INDIA METEOROLOGICAL DEPARTMENT (MINISTRY OF EARTH SCIENCES) SOUTHWEST MONSOON-2020 END OF SEASON REPORT FOR STATE HIGHLIGHTS  For the state as a whole, the rainfall for the season (June-September) was 80% of its long period average (LPA) and thus categorized as a deficit monsoon.  Monthly rainfall over Uttarakhand as a whole was 82% of LPA in June, 90% of LPA in July, 93% of LPA in August and 31% of LPA in September respectively.  Out of the total 13 districts of Uttarakhand 01 district received excess, 04 districts received normal and 08 districts received deficient seasonal rainfall.  Monsoon current advanced over Uttarakhand on 23rdJune, 2020 and covered the entire State on the 24th June, 2020.  The monsoon activity over Uttarakhand was deficient duringthe season (June-September).  South-West Monsoonwithdrew from the entire State on 30thSeptember, 2020.

1. ONSET OF SOUTHWEST MONSOON – 2020

The southwest (SW) monsoon 2020 set in over Kerala on its normal date of 01stJune.It advanced over some parts of Kumaon region ofUttarakhandon 23rd June. It advanced further overmost parts of Uttarakhand on 24th June and covered the entire state on 24th June 2020.Fig.1 shows the isochrones of advance of SW Monsoon 2020.

Fig.1 Isochrones of advance of SW-Monsoon 2020

2. CHIEF SYNOPTIC FEATURES OF SW MONSOON - 2020:

Monsoon activity and significant rainfall (7 Date Synoptic Situation cm and above) (at 08:30 Hours IST. of Next Day)

• A western disturbance as a trough in mid- tropospheric levels ran with its axis at 5.8 km above mean sea level roughly along Long.65°E to the north of Lat.27°N. Very light to light rainfall/thunderstorm occurred • The cyclonic circulation over north Rajasthan & neighbourhood laid over at a few places in Uttarakhand.Heavy rainfall south Haryana & neighbourhood and extended up to 0.9 km above mean sea occurred at isolated places (Banbasa - level. 12.06.2020 ) in Uttarakhand. Monsoon activity • A western disturbance as a trough in mid- tropospheric levels ran with its remained normal. axis at 5.8 km above mean sea level roughly along Long.65°E to the north of

Lat.27°N. Banbasa-8 • The trough ran from the above cyclonic circulation over south Haryana to the cyclonic circulation associated with the low pressure area across north Madhya Pradesh and Chhattisgarh at 0.9 km above mean sea level. • The cyclonic circulation over East Uttar Pradesh & neighbourhood extending up to 3.6 km above mean sea level persisted. • The trough at mean sea level ran from central Pakistan to Bangladesh Light to moderate rainfall occurred at a few across north Rajasthan, south Uttar Pradesh, Jharkhand and Gangetic West places in Uttarakhand. Heavy rainfall/ 17.06.2020 Bengal and extended up to 0.9 km above mean sea level. thunderstorm occurred at isolated places in • A trough ran from East Uttar Pradesh to Bangladesh across Jharkhand and Uttarakhand. Gangetic West Bengal between 1.5 & 3.1 km above mean sea level. • The Western Disturbance as a trough between 5.8 & 7.6 km above mean Dharchula-10. sea level roughly along Long.80°E to the north of Lat.32°N had moved away north-eastwards. • The Northern Limit of Monsoon (NLM) passed through Lat. 25°N/Long. 68°E, Ahmedabad, Shajapur, Fatehpur, Lat. 28°N/Long. 80°E, Mukteshwar, and Lat. 32°N/Long. 79°E. • Conditions were becoming favourable for further advance of southwest monsoon into remaining parts of Gujarat, Madhya Pradesh, Uttar Pradesh, Light to moderate rainfall/thunderstorm occurred entire Western Himalayan Region, Haryana, & , most parts at most places in Uttarakhand. Heavy rainfall 23.06.2020 of Punjab and some parts of Rajasthan during next 48 hours. occurred at isolated places of Uttarakhand. • The trough at mean sea level from north Punjab to northwest Bay of Bengal ran from northwest Rajasthan to northwest Bay of Bengal across northeast -8, Betalghat-7, Jakholi-7, Rajasthan, north Madhya Pradesh, northern parts of Chhattisgarh, southern Gangolihat-7. parts of Jharkhand and northern parts of Odisha and extends up to 1.5 km above mean sea level. • Cyclonic circulation laid over central Pakistan & neighbourhood and extendedupto 1.5 km above mean sea level. • The western part of the monsoon trough at mean sea level passed through Very light to moderate rainfall/thunderstorm , Ambala, Meerut and Gorakhpur and its eastern part laid close to the occurred at a few places in Uttarakhand. Very foothills of the . heavy rainfall occurred at isolated places 28.06.2020 • The cyclonic circulation over central Pakistan & neighbourhood extending (Dharchula).Monsoon activity remained normal upto 1.5 km above mean sea level persisted. and rainfall distribution remained scattered. • The east-west shear zone ran roughly along 15°N Lat. at 5.8 km above mean sea level. Dharchula-13. • The monsoon trough at mean sea level passed through Amritsar, Ambala, Delhi, Fursatganj, Jehanabad, Dhanbad, Digha, then south-eastwards to Very light to moderate rainfall/thunderstorm north Bay of Bengal. occurred at a few places in Uttarakhand. Very • The cyclonic circulation over central Pakistan & neighbourhood extending up heavy rainfall occurred at isolated places. 29.06.2020 to 1.5 km above mean sea level persisted. Monsoon activity remained normal in • A cyclonic circulation laid over East Uttar Pradesh & neighbourhood at 0.9 Uttarakhand. km above mean sea level. • The east-¬west shear zone ran roughly along 15°N Lat. at 5.8 km above Sama-16 mean sea level had become less marked. • A cyclonic circulation laid over West Rajasthan & neighbourhood at 0.9 km above mean sea level. Very light to moderate rainfall/thunderstorm • A trough ran from cyclonic circulation over West Rajasthan to occurred at a few places in Uttarakhand. Heavy interior Odisha across Madhya Pradesh and Chhattisgarh at 0.9 km above rainfall occurred at isolated places. Monsoon 01.07.2020 mean sea level. activity remained normal in Uttarakhand. • A cyclonic circulation laid over East Uttar Pradesh & neighbourhood

between 1.5 km & 4.5 km above mean sea level. Loharkhet-9, Dharchula-7. • A shear zone ran roughly along Lat. 15°N between 4.5 km & 5.8 km above mean sea level. • The monsoon trough at mean sea level passed through Ganganagar, Narnaul, Aligarh, Sultanpur, Patna, Raiganj, Shillong and Imphal • The cyclonic circulation over East Uttar Pradesh & neighbourhood persisted and seen between 1.5 km & 3.6 km above mean sea level. • The trough from above cyclonic circulation over East Uttar Pradesh to Very light to moderate rainfall/thunderstorm Vidarbha across East Madhya Pradesh persisted and seen between 3.1 km & occurred at a few places in Uttarakhand. Heavy 3.6 km above mean sea level. rainfall occurred at isolated places. Monsoon 02.07.2020 • A cyclonic circulation laid over West Rajasthan & neighbourhood and over activity remained normal in Uttarakhand. interior Odisha&neighborhood at 0.9 km above mean sea level has become

less marked. Sama-9, Loharkhet-7 • Thetrough from cyclonic circulation over West Rajasthan to cyclonic circulation over interior Odisha across Madhya Pradesh and Chhattisgarh at 0.9 km above mean sea level had become less marked. • A shear zone ran roughly along Lat. 15°N between 4.5 km & 5.8 km above mean sea level had become less marked • The monsoon trough at mean sea level passed through Ganganagar, Narnaul,Gwalior, Sidhi,Daltonganj and Disha then south-eastwards towards north Bay of Bengal. Light to moderate rainfall occurred at many • The cyclonic circulation over East Uttar Pradesh & neighbourhood persisted places. Heavy rainfall occurred at isolated places and now seen between 1.5 km & 3.1 km above mean sea level. in Uttarakhand. Thunderstorm occurred at a few • The trough from above cyclonic circulation over East Uttar Pradesh to 03.07.2020 places in Uttarakhand. Monsoon activity Vidarbharan up to east Vidarbha across East Madhya Pradesh and seen remained normal in Uttarakhand. between 1.5 km and 3.1 km above mean sea level.

• A cyclonic circulation laid over Northeast Rajasthan & neighbourhood at 0.9 Munsiyari-10, Kapkot-9, Sama-8, Dharchula-8 km above mean sea level. • A shear zone ran roughly along 16°N between 3.6 km & 5.8 km above mean sea level tilting, southwards withheight. Heavy to very heavy rainfall occurred at isolated places. Very light to moderate rainfall occurred at most places in Uttarakhand. Thunderstorm • The cyclonic circulation over Northeast Rajasthan & neighbourhood occurred at a few places in Uttarakhand. persisted and seen at 1.5 km above mean sea level Monsoon activity remained active in • The trough cyclonic circulation over East Uttar Pradesh to east Vidarbha Uttarakhand. between 1.5 km & 3.1 km above mean sea level had become less marked. -12, Jollygrant-11, 04.07.2020 • The monsoon trough at mean sea level passed through Anupgarh, Sikar, Nandaprayag(CWC)-10, -9, Gwalior, Sidhi, Ranchi, Jamshedpur, Haldia and thence southeastwards to (CWC)-9, Devprayag-9, eastcentral Bay of Bengal and extends upto 0.9 km above mean sea level. -8, Kalsi(AWS)-8, • The cyclonic circulation over East Uttar Pradesh & neighbourhood persisted Karnaprayag(AWS)-8, (AWS)-8, and seen at 3.1 km above mean sea level. Ranimazra(AWS)-7, Lansdwone(AWS)-7, Nandakesari-7, Champawat(AWS)-7, Haripur- 7, Berinag-7, Ganganagar-7. Very light to moderate rainfall/thunderstorm occurred at most places in Uttarakhand. Heavy • The Well Marked Low Pressure Area over Saurashtra& neighbourhood with to very heavy rainfall occurred at isolated places associated cyclonic circulation extending upto 7.6 km above mean sea level in Uttarakhand. Monsoon activity is active in 07.07.2020 tilting southwards with height persisted. Uttarakhand. • The trough in westerlies with its axis at mid-tropospheric levels ran roughly -19, Banbasa-18, Mukteshwar-13, along Longitude 72° E to the north of Latitude 30°N. -12, Haldwani-11, Pantnagar-9, -8, Champawat-8, Ranikhet-7, Betalghat-7, Loharkhet-7 Very light to moderate rainfall/thunderstorm • A trough ran from the cyclonic circulation associated with the Well Marked occurred at many places in Uttarakhand. Heavy Low Pressure Area over Gulf of Kutch &neighbourhood to north Rajasthan at rainfall occurred at isolated 0.9 km above mean sea level. 08.07.2020 places(Narendranagar) inUttarakhand. Monsoon • A Western Disturbance as a trough in midtroposphericwesterlies with its axis activity remained normal in Uttarakhand. at 5.8 km above mean sea level ran roughly along Longitude 60° E to the

north of Latitude 23° N. Narendranagar-8 • The Well Marked Low Pressure Area over Gulf of Kutch &neighbourhood laid as a Low Pressure Area over northeast Arabian Sea & adjoining south Pakistan and associated cyclonic circulation extendedupto 5.8 km above mean sea level tiltingsouth-westwards with height. Very light to moderate rainfall occurred at many • The trough from the cyclonic circulation associated with the above Low places in Uttarakhand. Heavy to very heavy Pressure Area to north Rajasthan at 0.9 km above mean sea level had rainfall occurred at isolated places (Sama, become less marked. Chamoli) in Uttarakhand. Thunderstorm occurred 09.07.2020 • The monsoon trough at mean sea level passed through Amritsar, Karnal, at a few places in Uttrakhand. Monsoon activity , Ballia, Patna, Bhagalpur and its eastern part runs close to the remained normal in Uttarakhand. foothills of the Himalayas.

• A cyclonic circulation laid over Haryana & neighbourhood and extends upto Sama(HMO)-12, Chamoli-9. 1.5 km above mean sea level. • The Western Disturbance as a trough in mid-tropospheric westerlies with its axis at 5.8 km above mean sea level roughly along Longitude 62° E to the north of Latitude 33° N persisted. • The monsoon trough at mean sea level ran close to foothills of the Himalayas. Very light to moderate rainfall/thunderstorm • The Low Pressure Area over northeast Arabian Sea & adjoining south occurred at a few places in Uttarakhand. Heavy Pakistan persisted. The associated cyclonic circulation extendedupto 3.6 km rainfall occurred at isolated places (Munsiyari, above mean sea level. 10.07.2020 Dharchula&Kotdwar) in Uttarakhand. Monsoon • The Western Disturbance as a trough in midtroposphericwesterlies with its activity remained normal in Uttarakhand. axis at 5.8 km above mean sea level roughly along Longitude 66° E to the

north of Latitude 33° N persisted. Munsiyari-10,Dharchula-9,Kotdwar-7. • A cyclonic circulation laid over Eastcentral Arabian Sea off north Maharashtra coast at 5.8 km above mean sea level. • The monsoon trough at mean sea level passed through Amritsar, Chandigarh, Badaun, Churk, Jamshedpur, Digha and thence southeastwards to Northeast Bay of Bengal. • A cyclonic circulation laid over Northwest Bay of Bengal and adjoining Very light to moderate rainfall/thunderstorm Gangetic West Bengal between 2.1 & 5.8 km above mean sea level. occurred at a few places in Uttarakhand. Heavy • A cyclonic circulation laid over southeast Uttar Pradesh & neighbourhood rainfall occurred at isolated places in and extends upto 1.5 km above mean sea level. 14.07.2020 Uttarakhand. Monsoon activity remained weak in • The cyclonic circulation over South Pakistan & neighbourhood at 1.5 km Uttarakhand. above mean sea level persisted.

• The Western Disturbance as a trough in midtroposphericwesterlies with its Dehradun(CWC)-7, Dhumakot-7. axis at 5.8 km above mean sea level ran roughly along Longitude 70°E to the north of Latitude 32°N. • The cyclonic circulation over Southwest Rajasthan & neighbourhood at 2.1 km above mean sea level had become less marked. Very light to moderate rainfall/thunderstorm occurred at many places in Uttarakhand. Heavy • The cyclonic circulation over south Uttar Pradesh & neighbourhood laid over to very heavy rainfall occurred at isolated places 16.07.2020 Central parts of North Madhya Pradesh & neighbourhood and extends upto (Loharkhet, Sama and ). Monsoon 2.1 km above mean sea level. activity remained normal in Uttarakhand. Loharkhet -17, Sama-11, Uttarkashi -9. Heavy rainfall occurred at isolated places(Sama, • The monsoon trough at mean sea level passed through Phalodi, Ajmer, Haldwani and Loharkhet). Very light to moderate 17.07.2020 Guna, Satna, Daltonganj, Shanti Niketan and thence eastwards to Tripura. rainfall occurred at many places in Uttarakhand. • A cyclonic circulation laid over south Rajasthan & neighbourhood and Monsoon activity remained normal in extends upto 0.9 km above mean sea level. Uttarakhand. Sama-11, Haldwani-10, Loharkhet -9. • The monsoon trough at mean sea level passed through Jaisalmer, Ajmer, Morena, Fatehpur, Churk, Hazaribag, Shanti Niketan and thence eastwards to Heavy to very heavy rainfall occurred at isolated Tripura. places (Munsiyari-125.0 mm, Haripur-72.0 mm) • The cyclonic circulation over south Gujarat & neighbourhood laid over in Uttarakhand. Very light to moderate rainfall coastal areas of Saurashtra& Kutch and neighbourhood and extends upto 7.6 occurred at a few places in Uttarakhand. 18.07.2020 km above mean sea level tilting southwestwards with height. Monsoon activity remained normal in • The trough from the above cyclonic circulation over coastal areas of Uttarakhand. Saurashtra& Kutch and neighbourhood ranupto north Rajasthan at 1.5 km above mean sea level. Chalthi (Champawat-AWS)-14, Munsiyari -12, • A trough in midtroposphericwesterlies ran with its axis at 7.6 km above Haripur-7. mean sea level runs roughly along Long. 64°E to the north of Lat. 30°N • The monsoon trough at mean sea level passed through Ganganagar, Heavy to very heavy rainfall occurred at isolated Rohtak, Fursatganj, Patna and thence towards the foothills of Himalayas and places (Dharchula-149.4, Munsiyari-84.0 mm, extendedupto 0.9 km above mean sea level. Nainital-70.5 mm) in Uttarakhand. Very light to • The cyclonic circulation over coastal areas of Saurashtra& Kutch and 19.07.2020 moderate rainfall occurred at a few places in neighbourhood laid over southwest Rajasthan & neighbourhood and seen Uttarakhand. Monsoon activity remained normal between 3.1 km & 3.6 km above mean sea level. in Uttarakhand. • The trough from the cyclonic circulation over Saurashtra& Kutch to north Dharchula-15, Munsiyari-8 and Nainital-7 Rajasthan had become less marked. • The monsoon trough at mean sea level passed through Amritsar, Ludhiana, Heavy to very heavy rainfall occurred at isolated Meerut, Bareilly, Gorakhpur, Bhagalpur and eastern end laid close to the places in Uttarakhand. Very light to moderate foothills of the Himalayas. rainfall occurred at most places in Uttarakhand. • The cyclonic circulation over southwest Rajasthan & neighbourhood Thunderstorm occurred at isolated places in 20.07.2020 persisted and seen at 3.6 km above mean sea level. Uttarakhand. Monsoon activity remained normal • The trough in midtroposphericwesterlies with its axis at 7.6 km above mean in Uttarakhand. sea level ran roughly along Long. 70°E to the north of Lat. 32°N. (CWC)-11, Dehradun (CWC)-8, • The cyclonic circulation over central Pakistan & neighbourhood merged with Roshnabad-7, Raiwala (AWS)-7, Chalthi heat low. (AWS)-7, Didihat (AWS)-7. • The monsoon trough at mean sea level passed through Bikaner, Narnaul, Fursatganj, Patna, Malda and thence eastwards to Nagaland across Meghalaya. • The Western Disturbance as a cyclonic circulation over southeastern parts of Afghanistan & neighbourhood laid over north Pakistan & neighbourhood and extendedupto 2.1 km above mean sea level. Very light to moderate rainfall occurred at many • A trough ran from the above Western Disturbance to Eastcentral Arabian places with heavy rainfall at isolated places in Sea off Konkan coast across West Rajasthan and Saurashtra& Kutch Uttarakhand. Thunderstorm occurred at isolated between 0.9 km & 2.1 km above mean sea level. places in Uttarakhand. Monsoon activity • The cyclonic circulation over Eastcentral Arabian Sea off Karnataka coast remained normal in Uttarakhand. laid over Eastcentral Arabian Sea off Konkan coast between 2.1 km & 4.5 km 26.07.2020 above mean sea level. Loharkhet(HMO)-9, Kalsi(AWS)-9, • A trough ran from the above system to southeast Uttar Pradesh at 4.5 km Haldwani(AWS)-9, Sultan pur patti-9, above mean sea level. Dehradun-8, Dehradun(CWC) -7, • The cyclonic circulation between 0.9 km & 1.5 km above mean sea level Dehradun(AWS)-7, Haripur(FMO)-7 & over central parts of Rajasthan had become less marked. Dharchula-7. • The cyclonic circulation over northeast Rajasthan & neighbourhood between 2.1 km & 3.6 km above mean sea level had become less marked. • The cyclonic circulation at 1.5 km above mean sea level over south Gujarat Region & neighbourhood had become less marked. • The trough from Saurashtra& Kutch to Punjab between 4.5 km & 7.6 km above mean sea level had become less marked. • The monsoon trough at mean sea level continued to run close to the foothills Very light to moderate rainfall occurred at many of Himalayas. places with heavy rainfall at isolated places in • The Western Disturbance as a cyclonic circulation over north Pakistan & Uttarakhand. Thunderstorm occurred at a few neighbourhood extending upto 2.1 km above mean sea level persisted. The places in Uttarakhand. Monsoon activity 27.07.2020 trough from the above Western Disturbance to EastcentralArabian Sea off remained normal in Uttarakhand Konkan coast had become less marked.

The cyclonic circulation over Eastcentral Arabian Sea off Konkan coast had Dharchula-18, Sama-18, Haridwar-12, become less marked. The trough from the above system to southeast Uttar Khatima-8, Sultanpur Patti-StateARG-7. Pradesh had also become less marked. Light to moderate rainfall occurred at most • The monsoon trough at mean sea level continued to run close to the foothills places with heavy to extreme heavy rainfall at of Himalayas. isolated places in Uttarakhand. Thunderstorm • The Western Disturbance as a cyclonic circulation over north Pakistan & occurred at a few places in Uttarakhand. neighbourhood extending upto 2.1 km above mean sea level had become Monsoon activity remained active in Uttarakhand 28.07.2020 less marked. Kapkot -31, Kanalichinna(AWS)-18, Sama-15, • A cyclonic circulation laid over southwest Rajasthan between 2.1 km & 3.1 Loharkhet-13, Thal(ARG)-12, Dharchula-11, km above mean sea level. Didihat-11, Chamoli -9, Berinag-8, Banbasa-8, • A trough in westerlies ran from Jammu Division to Northeast Arabian Sea off Munsiyari-8, Chorgalia(ARG)-8, Khatima-8, Pakistan coast at 1.5 km above mean sea level. Gangolihat-7, Dehradun-7. • The monsoon trough at mean sea level passed through Firozpur, Hissar, Gurugram, Gwalior,Banda, Rewa, Daltonganj, Dumka, and thence eastwards Very Light to moderate rainfall occurred at most to Nagaland across Assam. places with heavy rainfall at isolated places in • A cyclonic circulation laid over Central Pakistan & neighbourhood at 1.5 km Uttarakhand. Monsoon activity remained normal 29.07.2020 above mean sea level. in Uttarakhand • A cyclonic circulation laid over Punjab & neighbourhood and extends upto 0.9 km above mean sea level. Haripur(FMO)-10, Dhumakot-7, Tehri-7, The trough in westerlies from Jammu Division to Northeast Arabian Sea off Devprayag(CWC)-7 Pakistan coast at 1.5 km above mean sea level had become less marked. • The monsoon trough at mean sea level passed through Ganganagar, Narnaul, Etawah, Varanasi, Patna and thence eastwards to Nagaland across Meghalaya and south Assam. • A northsouth trough ran from northeast Uttar Pradesh to southeast Madhya Very light to moderate rainfall occurred at most Pradesh and extends upto 0.9 km above mean sea level. places with heavy to very heavy • The cyclonic circulation over Southwest & adjoining West-central Bay of rainfall/thunderstorm at isolated places in Bengal off South Andhra Pradesh & North Tamil Nadu coasts laid over south Uttarakhand. Monsoon activity remained normal Coastal Andhra Pradesh & adjoining north Tamilnadu between 3.1 & 5.8 km in Uttarakhand. 30.07.2020 above mean sea level tilting southwestwards with height. • The cyclonic circulation over Southwest Rajasthan and adjoining North Sahastradhara-18(AWS), Dehradun(CWC)-16, Gujarat between 2.1 km & 3.1 km above mean sea level had become less Chamba(AWS)-10, Haripur(FMO)-10, marked. UCOST(AWS)-9, Mussoorie-9, Tehri-9, • The cyclonic circulation over Central Pakistan & neighbourhood at 1.5 km Dhanaulti-8, Kalsi(AWS)-8, Dunda-7, above mean sea level had merged with circulation associated with the heat Pratapnagar-7. low. • The cyclonic circulation over Punjab & neighbourhood extending upto 0.9 km above mean sea level had become less marked. • The monsoon trough at mean sea level passed through Bikaner, Very light to moderate rainfall occurred at most Sikar, , Fatehpur, Gaya, Dumka and thence eastwards to Manipur across places with heavy to very heavy Sub¬-Himalayan West Bengal and Assam. rainfall/thunderstorm occurred at isolated places • A cyclonic circulation laid over Meghalaya & neighbourhood at 0.9 km in Uttarakhand. Monsoon activity remained above mean sea level. normal in Uttarakhand. • An eastwest shear zone ran roughly along Lat.13°N tilting southwards with 31.07.2020 height between 3.1km & 5.8 km above mean sea level. Haridwar-16, Roshnabad-12, Laksar-12, Sama- • A cyclonic circulation laid over Punjab & neighbourhood and extendedupto 11, Dehradun-11, Loharkhet-10, 0.9 km above mean sea level. (AWS)-10, Khanpur(AWS)-9, • The northsouth trough from northeast Uttar Pradesh to southeast Madhya Narsan(AWS)-8, Rani Majra(AWS)-8, Pradesh extending upto, 0.9 km above mean sea level had become less Thal(AWS)-7, Sahastradhara(AWS) -7 marked. Very light to moderate rainfall occurred at a few • A trough in mid tropospheric westerlies with its axis at 5.8 km above mean places with heavy to very heavy 01.08.2020 sea level ran roughly along Longitude 64°E to the north of Latitude 28°N. rainfall/thunderstorm occurred at isolated places • The cyclonic circulation over Punjab & neighbourhood extending upto 0.9 in Uttarakhand. Monsoon activity remained km above mean sea level had become less marked. normal in Uttarakhand. Kapkot-12, Banbasa-9, Ukhimath-8, Loharkhet-8. • The monsoon trough at mean sea level passed through Bikaner, Sikar, Delhi, Budaun, Lucknow, Buxar, Bokaro, Kolkata and thence southeastwards to Northeast Bay of Bengal and extends upto 1.5 km above mean sea level. Very light to moderate rainfall occurred at many • The Well marked low pressure area over central parts of North Arabian Sea places with heavy to very heavy/Extremely heavy adjoining south Pakistan laid over Northwest & adjoining Northeast Arabian rainfall (cm) occurred at isolated places in Sea & neighbourhood. The associated cyclonic circulation extendedupto 5.8 Uttarakhand. Monsoon activity is Normal in 08.08.2020 km above mean sea level. It was likely to move westwards. Uttarakhand. • The trough from cyclonic circulation associated with well marked low pressure area to Madhya Pradesh ran from cyclonic circulation associated Haldwani-20, Chorgaliya(AWS)-18, Devprayag- with the well marked low pressure area over Northwest & adjoining Northeast 11, Khatima-10, Thal(AWS)-8, Munsiyari-7, Arabian sea and neighbourhood to southeast Uttar Pradesh across south Ukhimath-7, Haridwar-7. Rajasthan & North Madhya Pradesh between 2.1 km & 4.5 km above mean sea level. • The monsoon trough at mean sea level passed through Firozpur, Delhi, Very light to moderate rainfall occurred at many Fursatganj, Ambikapur and thence southeastwards to the centre of low places with heavy to very heavy rainfall occurred pressure area over northwest Bay of Bengal off north OdishaGangetic West at isolated places in Uttarakhand. Monsoon Bengal coasts and extendedupto 0.9 km above mean sea level. activity remained Normal in Uttarakhand. 09.08.2020 • A cyclonic circulation laid over southeast Uttar Pradesh and neighbourhood at 1.5 km above mean sea level. Sahastradhara (ARG)-17, Loharkhet-16, Sama- • The trough from Northwest Arabian sea off Oman coast to southeast Uttar 15, Mussoorie-12, Bhatwari-11, Kalsi (AWS)-10, Pradesh across south Rajasthan & North Madhya Pradesh between 2.1 km & Haripur-10, Dhanolti-9, Dehradun(CWC)-9, 4.5 km above mean sea level had become less marked. Munsiyari-8, Kapkot-8, Birahi-7, Chopta (ASG)-7 • The monsoon trough at mean sea level passed through Bikaner, Jaipur, Gwalior, centre of low pressure area over northeast Madhya Pradesh, Jamshedpur, Contai and thence southeastwards to Northeast Bay of Bengal Light to moderate rainfall occurred at most places and extends upto 0.9 km above mean sea level. with heavy to very heavy rainfall occurred at • The low pressure area over northeast Madhya Pradesh & neighbourhood isolated places in Uttarakhand. Monsoon activity persisted. The associated cyclonic circulation extendedupto 2.1 km above remained Active in Uttarakhand. 10.08.2020 mean sea level. • The cyclonic circulation over southeast Uttar Pradesh and neighbourhood at Deoprayag-13, Mussoorie-11, Chamoli-11, 1.5 km above mean sea level had merged with the cyclonic circulation Ukhimath-10, -10, Kapkot-9, - associated with the low pressure area northeast Madhya Pradesh & 9, Berinag-9, Garud-9, Haripur-8, Dharchula-8, neighbourhood. Sama-8, Nandprayag-8, Birahi-8, Didihat-7, • The trough from southeast Rajasthan to cyclonic circulation associated with Dhanauri(AWS)-7, Nandkesari-7 low pressure area over northeast Madhya Pradesh at 3.1 km above mean sea level had become less marked. • The low pressure area over northwest Madhya Pradesh & neighbourhood had become less marked. However the associated cyclonic circulation Very light to moderate rainfall occurred at most extending upto 1.5 km above mean sea level laid over Northeast Rajasthan & places with heavy rainfall occurred at isolated neighbourhood. places in Uttarakhand. Monsoon activity • The monsoon trough at mean sea level passed through Bikaner, Sikar, remained Normal in Uttarakhand. 11.08.2020 Gwalior, Sidhi, Dehri, Dhanbad, Kolkata and thence southeastwards to Northeast Bay of Bengal and extendedupto 0.9 km above mean sea level. Chopta(AWS)-10, Bageshwar-10, • The cyclonic circulation over Southeast Pakistan & adjoining Kutch laid over Sahastradhara(AWS)-10, Narendranagar-10, South Pakistan & adjoining West Rajasthan between 1.5 & 2.1 km above Sama(HMO)-10, Didihat(AWS)-9, mean sea level. (CWC)-8, Loharkhet(HMO)-7, • A trough ran from Southwest Uttar Pradesh to South Chhattisgarh across Dhanaulti-7 East Madhya Pradesh between 1.5 km & 2.1 km above mean seal level. • The monsoon trough at mean sea level passed through Ferozpur, Kaithal, Moradabad, Gonda, Gaya, Shantiniketan, Canning Light to moderate rainfall occurred at most places and thence southeastwards to Northeast Bay of Bengal. with heavy to very heavy rainfall occurred at • The cyclonic circulation over South Pakistan & adjoining West Rajasthan isolated places in Uttarakhand. Monsoon activity 12.08.2020 persisted and had seen at 2.1 km above mean sea level. remained Normal in Uttarakhand. • The trough from Southwest Uttar Pradesh to south Chhattisgarh across East Madhya Pradesh between 1.5 km &2.1 km above mean seal level had Nandkesari-15, Haldwani-11, Dewal(AWS)-9, become less marked. Nandprayag-9, Betalghat-9, Mussoorie-8, • The cyclonic circulation over South Pakistan & adjoining West Rajasthan Kalsi(AWS)-7, Nainital-7, Champawat(AWS)-7 persisted and now seen at 2.1 km above mean sea level. • The monsoon trough at mean sea level passed through Ferozepur, Narnaul, Very light to light rainfall/thunderstorm occurred Gwalior, Satna,Ambikapur, Chaibasa and thence to the centre of low pressure at a few places with moderate rainfall at isolated 13.08.2020 area over Northwest Bay of Bengal offnorthOdisha& West Bengal coasts. places in Uttarakhand. Monsoon activity • The cyclonic circulation over South Pakistan & adjoining West Rajasthan at remained Weak in Uttarakhand. 2.1 km above meansea level persisted. Very light to moderate rainfall occurred at most places with heavy to very heavy/extremely heavy rainfall/thunderstorm occurred at isolated places. Monsoon activity remained Active in • The monsoon trough at mean sea level passed through Bikaner, Ajmer, Uttarakhand. 15.08.2020 Shivpuri, Nowgong, Rewa, Daltonganj and Purulia. Sama-27, Dehradun(CWC)-18, Dhumakot-18, • The cyclonic circulation over south Haryana & neighbourhood persisted and Dehradun(AWS-Mokhampur)-17, extends upto 3.1 km above mean sea level. Lansdowne(AWS)-15, Loharkhet-13, Song(AWS)-13, UCOST(AWS)-12, Dehradun(MC)-11, Rikhnikhal(AWS)-11, Haripur- 9, Sahaspur(AWS)-9, Munsyari-8, Rani mazra(AWS)-7, Kotdwar(AWS)-7 • The monsoon trough at mean sea level passed through Bikaner Ajmer, Gwalior, Satna, center of low pressure area over south Jharkhand & Very light to moderate rainfall occurred at most neighbourhood, Midnapur and thence Eastwards to Northeast Bay of Bengal places with heavy to very heavy rainfall occurred and extends upto 1.5 km above mean sea level. at isolated places. Monsoon activity is Normal in 16.08.2020 • The cyclonic circulation over south Haryana & neighbourhood laid over Uttarakhand. south Punjab & neighbourhood and extends upto 1.5 km above mean sea level. Kalsi(AWS)-14, Loharkhet-12, Song(AWS)-11, • The cyclonic circulation over south Gujarat region & neighbourhood Sama-10, Kapkot-10, Haripur-9, Thal(AWS)-9 persisted and seen between 2.1 km & 3.1 km above mean sea level. • The Low pressure area over north Chhattisgarh & neighbourhood laid over Very light to moderate rainfall/thunderstorm Northeast Madhya Pradesh & adjoining areas of north Chhattisgarh and occurred at many places with heavy rainfall Southeast Uttar Pradesh with the associated cyclonic circulation extending occurred at isolated places. Monsoon activity is 17.08.2020 upto 5.8 km above mean sea level tilting southwards with height. It was very Normal in Uttarakhand. likely to move west-northwestwards and weaken during next 24 hours.

• The cyclonic circulation over south Punjab & neighbourhood persisted and Berinag - 64.8mm seen at 1.5 km above mean sea level. • The monsoon trough at mean sea level passed through Bikaner, Alwar, Gwalior, Banda, Siddhi, Ranchi, Bankura, Canning and thence Very light to moderate rainfall occurred at most southeastwards to Northeast Bay of Bengal and extendedupto 1.5 km above places with heavy to very heavy rainfall occurred mean sea level. at isolated places. Monsoon activity is Normal in 18.08.2020 • The cyclonic circulation over south Punjab & neighbourhood laid over Uttarakhand. northwest Rajasthan & neighbourhood and extendedupto 1.5 km above mean sea level. Jolly Grant-12, Karnprayag (CWC)-10, • The cyclonic circulation over northeast Madhya Pradesh & neighbourhood Dehradun-9, Sama(HMO)-9, Nandprayag(CWC)- extending upto 5.8 km above mean sea level tilting southwards with height 8, Dharchula-7 persisted. • The Low Pressure Area over north Bay of Bengal & neighbourhood laid as a Well Marked Low Pressure Area over Northwest Bay of Bengal & neighbourhood with associated cyclonic circulation extending upto 7.6 km above mean sea level tilting southwestwards with height. It was very likely to move westwards gradually and concentrate into a Depression during next 24 hours. • The monsoon trough at mean sea level passed through Ganganagar, Delhi, Light to moderate rainfall occurred at most places Badaun, Allahabad, Daltonganj and thence eastsoutheastwards to the with heavy rainfall occurred at isolated places. centre of Well Marked Low Pressure Area over Northwest Bay of Monsoon activity is Active in Uttarakhand. 19.08.2020 Bengal & neighbourhood.

• The eastwest shear zone ran roughly along Lat. 21°N across central Dhanaulti-11, Kashipur-9, Dhumakot-8, Bhatwari- between 3.6 km & 5.8 km above mean sea level tilting southwards with 7 height. • The cyclonic circulation over northwest Rajasthan & neighbourhood laid over West Rajasthan & neighbourhood and extends upto 1.5 km above mean sea level. • The cyclonic circulation over south Gujarat Region & neighbourhood between 2.1 km & 5.8 km above mean sea level tilting southwestwards with height had become less marked. • The well Marked Low Pressure Area over Northwest Madhya Pradesh & neighbourhood laid as a Low Pressure Area over central parts of East Rajasthan & neighbourhood with the associated cyclonic circulation extending upto 7.6 km above mean sea level tilting southwestwards with height. It was very likely to move nearly westwards across Rajasthan during next 2 days. • The Monsoon Trough at mean sea level passed through Jaisalmer, centre of Very light to moderate rainfall occurred at a few Low Pressure Area over East Rajasthan & neighbourhood, Jhansi, Sidhi, places with heavy rainfall at isolated places in Hazaribagh, Diamond Harbour and thence south southeast wards to Uttarakhand. Thunderstorm occurred at isolated Northwest Bay of Bengal and extendedupto 0.9 km above mean sea level. 23.08.2020 places in Uttarakhand. Monsoon activity • The cyclonic circulation extending upto 1.5 km above mean sea level over remained Normal in Uttarakhand. south Assam & neighbourhood persisted.

• The cyclonic circulation between 3.1 km and 5.8 km above Haripur-8 mean sea level over Northeast Arabian Sea & neighbourhood laid over Northwest Arabian Sea & neighbourhood. • A cyclonic circulation laid over Bangladesh & neighbourhood between 5.8 km and 7.6 km above mean sea level. • A fresh Low Pressure Area was likely to develop over North Bay of Bengal & neighbourhood around 25th August, 2020. • A fresh Low Pressure Area was likely to develop over North Bay of Bengal & neighbourhood around 25th August, 2020. • The Low Pressure Area over central parts of south Rajasthan & Very light to moderate rainfall occurred at most neighbourhood laid over Southwest Rajasthan & neighbourhood and the places with heavy rainfall at isolated places in associated cyclonic circulation extendedupto 7.6 km above mean sea level Uttarakhand. Monsoon activity remained Active 24.08.2020 tilting south-westwards with height. It was likely to persist during next 24 in Uttarakhand. hours and merge with heat low thereafter.

• The Monsoon Trough at mean sea level passed through centre of Low Chamoli-9, Mori-7 Pressure Area over Southwest Rajasthan & neighbourhood, Ajmer, Tikamgarh, Sidhi, Ranchi, Kolkata and thence east-south-eastwards to the centre of Low Pressure Area over North Bay of Bengal & neighbourhood. • The Low Pressure Area over Southwest Rajasthan &neighbourhood,laid over southwest Rajasthan & adjoining Pakistan with the associated cyclonic Very light to moderate rainfall occurred at many circulation extending upto 7.6 km above mean sea level tilting places with heavy rainfall at isolated places in southwestwardswith height. It was likely to merge with heat low during next 48 Uttarakhand. Monsoon activity is Normal in hours. 25.08.2020 Uttarakhand. • The Monsoon Trough at mean sea level passed through centre of Low

Pressure Area over Southwest Rajasthan & adjoining Pakistan, Churu, Sama(AWS)-11, Song(AWS)-8, Sama(HMO)-7, Narnual, Gorakhapur, Patna, Bankura, Canning and thence southeastwards Loharkhet-7 to the centre of Low Pressure Area over North Bay of Bengal & neighbourhood and extendedupto 1.5 Km above mean sea level. • The Monsoon Trough at mean sea level passed through Ganganagar, Very light to moderate rainfall occurred at most Hissar, Hardoi, Gorakhpur, Patna, places with heavy rainfall at isolated places in Jamshedpur, the centre of Well Marked Low Pressure Area over Northwest Uttarakhand. Thunderstorm occurred at isolated 26.08.2020 Bay of Bengal and adjoining coastal areas of Gangetic West Bengal and north places in Uttarakhand. Monsoon activity is Active Odisha and thence east southeastwards to Northeast Bay of Bengal. in Uttarakhand. • A cyclonic circulation between 1.5 km and 2.1 km above mean sea level laid over northwest Rajasthan and adjoining areas of Haryana and Punjab. Someshswar-7, Dharchula-7 • Monsoon Trough at mean sea level passed through Bikaner, Jaipur, centre Very light to moderate rainfall occurred at most of Well Marked Low Pressure Area over central parts of north Madhya places with heavy rainfall at isolated places in Pradesh & adjoining south Uttar Pradesh, Ranchi, Krishnanagar and thence Uttarakhand. Thunderstorm occurred at isolated 28.08.2020 southeastwards to North Bay of Bengal. places in Uttarakhand. Monsoon activity is • The cyclonic circulation over southeast Pakistan & neighbourhood between Normal in Uttarakhand. 3.1 & 5.8 km above mean sea level tilting southwards with height had become Banbasa(CWC)-7. less marked. • The cyclonic circulation extends up to 3.1 km above mean sea level over Very light to moderate rainfall occurred at Pakistan & adjoining Punjab laid over Punjab & adjoining Pakistan. scattered places in Uttarakhand. Heavy rainfall 02.09.2020 • The western end of the Monsoon Trough at mean sea level ran close to the occurred at isolated places. Monsoon activity is foothills of Himalayas and the eastern end passed through Bahraich, Gaya, normal. Thunderstorm occurred at isolated Shantiniketan and thence eastwards to Manipur across Bangladesh & south places in Uttarakhand. Assam. Uttarkashi-7, Uttarkashi(CWC)-7 • The Low Pressure Area over central parts of East Uttar Pradesh & neighbourhood and associated cyclonic circulation extending upto 5.8 km above mean sea level persisted. It was likely to move east-northeast-wards Very light to moderate rainfall occurred at a few during next 48 hours. places with heavy to very heavy rainfall at • The monsoon trough at mean sea level passed through Bikaner, Alwar, isolated places in Uttarakhand. Thunderstorm center of Low Pressure Area over central parts of East Uttar Pradesh & occurred at isolated places. Monsoon activity 22.09.2020 neighbourhood, Gaya, Malda and thence eastwards to Manipur across remained NORMAL. Bangladesh and south Assam. • The cyclonic circulation over West Rajasthan & neighbourhood laid over Bastia(ARG)-21, Khatima-12, Chalthi(AWS)-10, Northeast Rajasthan and extends upto 0.9 km above mean sea level. Chorgalia(AWS)-8, Sultanpur Patti(AWS)-8, • The Western Disturbance laid as a trough in mid & upper tropospheric Banbasa-7 westerlies with its axis at 5.8 km above mean sea level roughly along Long. 65°E to the north of Lat. 28°N. • The cyclonic circulation over Northwest Rajasthan & adjoining Punjab laid Very light to moderate rainfall occurred at a few over West Rajasthan & neighbourhood and extends upto 1.5 km above mean places with heavy to rainfall at isolated places in sea level. Uttarakhand. Thunderstorm occurred at isolated 23.09.2020 • A Western Disturbance as a cyclonic circulation at 3.1 km above mean sea places. Monsoon activity remained NORMAL. level laid over western parts of Afghanistan & neighbourhood with a trough aloft in mid & upper tropospheric westerlies with its axis at 5.8 km above Dehradun (CWC)-9, Ramnagar (AWS)-8, mean sea level roughly along Long. 62°E to the north of Lat. 30°N. Haldwani (HMO)-7 • The Low Pressure Area over central parts of East Uttar Pradesh & neighbourhood and associated cyclonic circulation extending upto 5.8 km above mean sea level persisted. It was likely to move eastnortheastwards during next 48 hours. Very light to light rainfall occurred at a few places • The monsoon trough at mean sea level passed through Bikaner, Alwar, and Moderate to heavy rainfall occurred at center of Low Pressure Area over central parts of East Uttar Pradesh & isolated places. Thunderstorm occurred at 24.09.2020 neighbourhood, Gaya, Malda and thence eastwards to Manipur across isolated places. Monsoon activity remained Bangladesh and south Assam. NORMAL. • The cyclonic circulation over West Rajasthan & neighbourhood laid over Northeast Rajasthan and extends upto 0.9 km above mean sea level. Haldwani(HMO)-10 • The Western Disturbance laid as a trough in mid & upper tropospheric westerlies with its axis at 5.8 km above mean sea level roughly along Long. 65°E to the north of Lat. 28°N.

3. WITHDRAWAL OF SOUTHWEST MONSOON:

The rainfall activity was deficientinUttarakhandduring theSW Monsoon season. The withdrawal of SW monsoon 2020this year commenced on 28th September, 2020 from west Rajasthan& Punjabwith achange in the lower tropospheric circulation pattern. The change in the wind flow pattern over Uttarakhand from south-easterly to north-westerlyand the development of anti-cyclonic circulation over west Rajasthan in lower levels made conditions favourable for the further withdrawal of southwest monsoon from remaining parts of Punjab, entire Haryana, Jammu & Kashmir, Ladakh, Himachal Pradesh, Uttarakhand,most parts of Rajasthan, some parts of Madhya Pradesh, most parts of Uttar Pradesh on 30th September.Consequently, SWmonsoon withdrew fromthe entire country on 28th October 2020 with the simultaneous onset of Northeast monsoon rainfall over the south Peninsula. Fig.3 shows the isochrones of withdrawal of SWMonsoon 2020.

Fig.3: Isochrones of withdrawal of Monsoon 2020

4. RAINFALL DISTRIBUTION OVER UTTARAKHAND DURING MONSOON – 2020:

The rainfall during SW monsoon season (June to September) for the State as a whole is as follows:

Met. Sub-division/ State ActualRainfall June- Normal/Long Period Average Departure from September (in mm) (LPA)RainfallJune-September(in mm) normal(in %) Uttarakhand 942.7 1176.9 -20

8 % 30 %

NORMAL DEFICIENT LARGE DEFICIENT EXCESS/LARGE EXCESS

62 %

Fig. 4 Rainfall Distribution over the area of Uttarakhand

The LPA rainfall based on 1951 to 2000 for Uttarakhand was 1229.2 mm which was revised in 2019 to 1176.9 mm based on 1961 to 2010 observed rainfall data series. As seen in the table above, the seasonal rainfall over Uttarakhand State/ sub- division as a whole was 80% of its LPA.The seasonal rainfall intensity distribution over the State was in the categories of excess, normal anddeficient. Out of 13 districts of Uttarakhand 01 district received large excess, 04 districts received normal and 08districts received deficient seasonal rainfall.In terms of area 08% area received large excess, 30% area receivednormal and 62% area receiveddeficientrainfall. In totality, the monsoon rainfall wasdeficient(-20%) over the state.

5. INTENSITY DISTRIBUTION OF RAINFALL DURING MONSOON-2020 OVER UTTARAKHAND:

UTTARAKHAND RAINFALL INTENSITY DISTRIBUTION MONSOON SEASON - 2020 80

70

60

50

40

30 NO. OF STATIONS

20

10

0 1 4 7 10131619222528 1 4 7 101316192225 28 31 3 6 9 12151821242730 2 5 8 11 14 17 20 23 26 29

DATE

VERY LIGHT RAINFALL LIGHT RAINFALL MODERATE RAINFALL HEAVY RAINFALL VERY HEAVY RAINFALL EXTREMELY HEAVY RAINFALL

Fig. 5 Rainfall Intensity Distribution

6. MONTHLY DISTRIBUTION OF RAINFALL OVER THE STATE:

The monthly rainfall distribution of the state is given in a table below:

Met. Sub-division/ Month Actual Rainfall (in Normal or Long period Departure from normal State mm) average (LPA) ( in (in %) mm) Uttarakhand June-2020 145.5 177.8 -18 July- 2020 367.3 407.7 -10 August- 2020 370.1 397.7 -7 September-2020 60.2 193.7 -69

From the above table, the monthly rainfall was normal over the state duringJune, July &August and deficient in September. The June rainfall was 82%, July 90%, August 93% and September 31% of theirrespective monthly LPAs. The amount of rainfall (in terms of % of LPA) was maximum in Augustand minimum in September. This year 08% area of Uttarakhandreceivedexcess, 30% area received normal and 62% areareceived deficientrainfall.In this way,the performance of monsoon 2020 was deficient (80%) over the State.

7. WEEKLY RAINFALL DISTRIBUTION:

Weekly rainfall distribution and departure over Uttarakhand Meteorological sub-divisions is shown in Fig. 6 and Fig. 7 below respectively: 140

120

100 101.9 99.3 97.3 95.3 94.3 95.6

82.9 80 78.6 71.4 Actual 63.6 60 61 Normal 114.7 107.6 53.4 49.9 96.3 83.5 84.6 40 78.8 36.6 75.9 37.7

Rainfall(inmm) 28.3 52.6 52 22.5 20 42.8 33.7 25.2 23.4 18.37.3 17.8 15.7 8.9 11.2 0 3 Jun- 10 17 24 01 Jul- 08 Jul- 15 Jul- 22 Jul- 29 Jul- 05 12 19 26 2 Sep- 9 Sep- 16 23 30 Jun- Jun- Jun- Aug- Aug- Aug- Aug- Sep- Sep- Sep-

Week Ending

Fig.6: Weekly Monsoon Rainfall-2020 over Uttarakhand

The weekly monsoon rainfall was more than normal over the State on 2 occasions, 1 in June and 1 in July; normal on 6 occasions, 1 in June, 1 in July and 4 in Augustand it was less than normal on other weeks. In terms of percentage departure from normal, the weekly rainfall was large excess (≥ +60%) during 1week,excess (+20 to +59 %) during 1 week, normal (-19% to +19%) during 6 weeks, deficient (-20% to -59%) during 10 weeks and large deficient (-60% to -99%)during 3weeks. Thus, week by week monsoon rainfall performance was average.

175.00

150.00

125.00

100.00

75.00

50.00

25.00

%Departure 0.00 3 Jun- 10 Jun- 17 Jun- 24 Jun- 01 Jul- 08 Jul- 15 Jul- 22 Jul- 29 Jul- 05 Aug-12 Aug-19 Aug-26 Aug- 2 Sep- 9 Sep- 16 Sep- 23 Sep- 30 Sep- -25.00

-50.00

-75.00

-100.00

Week Ending

Fig.7 Weekly departure of the Monsoon Rainfall 2020 over Uttarakhand

3 10 17 24 01 08 15 22 29 05 12 19 26 2 9 16 23 30 Week Ending Jun- Jun- Jun- Jun- Jul- Jul- Jul- Jul- Jul- Aug- Aug- Aug- Aug- Sep- Sep- Sep- Sep- Sep- Departure 151 -37 -31 5 -47 46 -45 -20 -18 -15 1 11 -5 -40 -62 -83 -58 -50

8. DISTRICT-WISE SPATIAL DISTRIBUTION OF RAINFALL DURING MONSOON2020

MONSOON-2020 SPATIAL RAINFALL DISTRIBUTION UTTARAKHAND 90

80

70 19

60 21 23 26 19 39 50 25 11 22 26 21 13 7 40 16 13 9 14 11 0 30 9 12 16 15 17 21 10 24 NUMBER OF DAYS DAYS OF NUMBER 20 15 13 7 17 13 33 31 12 8 10 21 18 14 14 15 16 14 11 8 12 11 0 0 0 0 0 0 ALMORA NAINITAL CHAMOLI HARDWAR DEHRADUN UTTARKASHI BAGESHWAR CHAMPAWAT RUDRAPRAYAG GARHWAL TEHRI GARHWAL GARHWAL GARHWAL DISTRICTS

ISOL SCT MANY MOST NAGAR SINGH UDHAM

Fig.8 District wise Spatial Distribution of Rainfall during monsoon 2020 over Uttarakhand

The maximum number of rainfall days was over Udham Singh Nagar district (78 days) and minimum rainfall days were over Hardwar district (35 days). Widespread to fairly widespread rainfall occurred on 50 days or more (maximum) inPithoragarhand 16 days (minimum) over .

9. DISTRICT-WISE HEAVY RAINFALL DISTRIBUTION DURING MONSOON 2020

MONSOON-2020 HEAVY RAINFALL DISTRIBUTION UTTARAKHAND 20 1 18 3 1 1 16 0 3 14 6 12 9 10 0 8 0 3 1 1 14 1 6 0 0 1 1 1 10 0 0 NUMBER NUMBER DAYSOF 4 2 7 7 6 6 5 5 5 5 5 2 0 3 1 0 ALMORA NAINITAL CHAMOLI HARDWAR DEHRADUN UTTARKASHI BAGESHWAR CHAMPAWAT PITHORAGARH RUDRAPRAYAG GARHWAL GARHWAL TEHRI GARHWAL GARHWAL PAURI DISTRICTS UDHAM UDHAM SINGH NAGAR

ISOL FEW MANY MOST

Fig.9 District wise Heavy Rainfall distribution during monsoon 2020 over Uttarakhand The maximum number of heavy rainfall days was over Pithoragarhdistrict (19 days) and minimum over Almoradistrict (2 days).

10. DISTRICTS WISE RAINFALL DISTRIBUTION (JUNE-SEPTEMBER) 2020:

The following table shows the district wise rainfall distribution for Uttarakhand:

Serial State/ Districts Actual Rainfall June- Normal/ Long period Departure from No September (in mm) average (LPA) Rainfall normal(in %) June-September ( in mm) 1. Almora 596.6 842.7 -29 2. Bageshwar 1992.4 842.7 136 3. Chamoli 845.3 776 9 4. Champawat 640.3 1338 -52 5. Dehradun 1123.2 1524.6 -26 6. Garhwal Pauri 641.6 1225.1 -48 7. Garhwal Tehri 706.9 990.2 -29 8. Hardwar 797.5 971.2 -18 9. Nainital 952.2 1425 -33 10. Pithoragarh 1547.8 1544.9 0 11. Rudraprayag 977.1 1484.5 -34 12. Udham Singh Nagar 1044.4 1073.6 -3 13. Uttarkashi 633.4 1208.4 -48

Out of 13 districts, 8 districts viz.Almora, Champawat, Dehradun, GarhwalPauri,GarhwalTehri,Nainital, RudraprayagandUttarkashireceived deficient; 4 districts viz.Chamoli, Haridwar, Pithoragarh, and Udham Singh Nagarreceived normal and 1 district viz. Bageshwarreceivedexcess rainfall in varying intensity. The actual rainfall of the season was highest over Bageshwar(1992.4mm) and lowest over Garhwal Tehri(596.6) districts. However, in terms of % of the normal rainfall/ LPA, Bageshwar district received the maximum 136% and Champawatminimum48%.Thus, monsoon 2019has been a deficient (-20%) monsoon year for Uttarakhand.

11. Monthly district-wise rainfall (in mm) over Uttarakhand during Monsoon Season-2020

June (in Departure July (in Departure Aug (in Departure Sept (in Departure S.N. State/ Districts mm) (%) June mm) (%) July mm) (%) Aug mm) (%) Sept

1 Almora 126 -17 217.7 -20 239.5 -9 13.4 -91 2 Bageshwar 340.9 124 708.9 159 812.7 209 129.9 -16 3 Chamoli 84.5 -16 312.7 16 407 44 41.1 -67 4 Champawat 124.5 -42 265.9 -44 192.3 -53 57.6 -77 5 Dehradun 124.4 -31 446.2 -20 465 -14 94.3 -62 6 Garhwal Pauri 77.7 -52 273.3 -35 246 -45 44.6 -78 7 Garhwal Tehri 127.5 -6 269.6 -22 283.4 -19 26.4 -84 8 Hardwar 77.5 -34 352.4 6 325 -9 42.6 -74 9 Nainital 144.7 -37 372.6 -24 349.9 -20 85 -68 10 Pithoragarh 305.2 18 602.9 12 541.1 10 98.7 -61 11 Rudraprayag 193.8 -7 339.7 -35 406.1 -27 37.5 -81 12 Udham Singh Nagar 180 20 460.8 22 307.3 -11 96.3 -52 13 Uttarkashi 73.3 -65 246.8 -41 272.7 -33 40.6 -77

60% or more20 % to 59 % 19 % to -19%-20 % to -59 % -60 % or less

12. Weekly district-wise rainfall (in mm) over Uttarakhand during Monsoon Season-2020 3 10 17 24 01 08 15 22 29 05 12 19 26 2 9 16 23 30 Week Ending Jun- Jun- Jun- Jun- Jul- Jul- Jul- Jul- Jul- Aug- Aug- Aug- Aug- Sep- Sep- Sep- Sep- Sep- ALMORA 7.3 17.0 16.8 56.2 31.1 98.1 44.1 20.8 20.5 57.5 46.3 74.5 29.7 63.2 10.3 0.0 0.0 3.1 BAGESHWAR 12.6 14.6 60.4 119.2 134.1 213.1 81.1 144.2 242.7 150.3 270.1 251.5 103.9 85.2 24.0 20.9 32.7 31.8 CHAMOLI 8.0 11.9 23.4 23.6 17.6 107.1 55.6 41.5 83.5 82.2 101.4 111.1 108.5 28.7 17.6 2.6 11.8 9.2 CHAMPAWAT 19.5 8.8 30.0 52.8 14.3 109.3 35.5 34.1 79.1 50.1 25.8 66.4 17.5 39.6 7.3 2.3 41.4 6.8 DEHRADUN 23.4 30.4 34.1 17.4 23.4 137.2 47.6 76.7 99.0 131.8 124.4 153.2 92.3 44.9 36.7 22.7 16.3 18.5 GARHWAL PAURI 12.4 11.6 16.8 32.9 5.4 97.5 44.2 42.7 50.7 56.7 46.7 76.6 74.9 27.9 27.8 10.2 3.2 3.4 GARHWAL TEHRI 30.1 21.3 16.8 48.5 10.7 79.5 35.7 39.0 44.2 95.5 104.7 58.0 64.9 31.4 17.8 3.5 5.1 0.0 HARIDWAR 18.2 29.1 13.5 13.7 3.1 112.7 39.5 119.6 55.3 123.2 83.0 68.8 58.3 17.0 20.3 4.2 8.0 8.0 NAINITAL 15.1 21.9 16.1 70.0 21.6 137.0 50.6 78.7 83.9 40.0 90.6 145.9 55.2 40.7 17.8 13.7 9.1 44.0 PITHORAGARH 17.4 28.7 50.5 108.5 102.0 157.6 92.4 153.4 160.5 95.3 181.0 181.0 58.7 63.3 30.4 19.1 36.4 11.8 RUDRAPRAYAG 10.8 36.1 48.0 82.4 18.9 105.7 48.5 59.0 59.6 127.3 109.3 95.4 97.6 41.2 12.1 2.9 13.9 8.7 U.S NAGAR 37.0 1.5 25.3 78.3 37.9 180.4 49.2 70.9 128.6 61.2 71.6 85.0 65.0 56.3 14.8 17.0 59.8 4.8 UTTARKASHI 27.7 9.4 5.1 21.8 17.8 49.4 32.5 82.3 28.4 83.4 31.3 47.5 118.1 37.9 36.3 0.7 0.3 3.4

< 10 mm10-20 mm20-50 mm50-100 mm>100 mm

13. Rainfall Map ofMonsoon-2020 of different Districts of Uttarakhand Met Sub-division:

PERIOD: 01.06.2020 – 30.09.2020