Monsoon Report
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INDIA METEOROLOGICAL DEPARTMENT (MINISTRY OF EARTH SCIENCES) SOUTHWEST MONSOON-2020 END OF SEASON REPORT FOR UTTARAKHAND 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 Champawat) 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, Rudraprayag 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, Chandigarh & Delhi, 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 Haldwani-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 Amritsar, Ambala, Meerut and Gorakhpur and its eastern part laid close to the occurred at a few places in Uttarakhand. Very foothills of the Himalayas. 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. Kotdwar-12, Jollygrant-11, 04.07.2020 • The monsoon trough at mean sea level passed through Anupgarh, Sikar, Nandaprayag(CWC)-10, Dehradun-9, Gwalior, Sidhi, Ranchi, Jamshedpur, Haldia and thence southeastwards to Karnaprayag(CWC)-9, Devprayag-9, eastcentral Bay of Bengal and extends upto 0.9 km above mean sea level. Mussoorie-8, Kalsi(AWS)-8, • The cyclonic circulation over East Uttar Pradesh & neighbourhood persisted Karnaprayag(AWS)-8, Lohaghat(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.