All India Weekly Weather Report 10 – 16 May 2018 Significant Weather Features Meteorological Analysis
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Government of India Ministry of Earth Sciences India Meteorological Department National Weather Forecasting Centre ALL INDIA WEEKLY WEATHER REPORT 10 – 16 MAY 2018 Table-1(A) Table-1(B) Table-1(C) Table-2 Table-3 Fig-1 Fig-2 Annexure-1 SIGNIFICANT WEATHER FEATURES Temperature Scenario: Heat wave conditions were observed at some places over Vidarbha for two days and at one or two pockets over East Madhya Pradesh and Vidarbha on one day each during the week. Maximum temperature above 44°C was reported at many places over Vidarbha and East Madhya Pradesh on a few days and over West Madhya Pradesh, West Rajasthan , Haryana, Chandigarh & Delhi on one or two days . The highest maximum temperature of 47.3°C was recorded at Chandrapur (Vidarbha) on 11th May 2018 in the plains of the country during the week. Thunderstorm activity: Thunderstorm accompanied with squall had been reported at a few places over Assam & Meghalaya, Tamilnadu, North Interior Karnataka and Kerala, Gangetic West Bengal, East Uttar Pradesh and Jammu & Kashmir on one or two days during the week. Similar activity had been reported at isolated places over Assam & Meghalaya, Nagaland, Manipur, Mizoram & Tripura, Odisha, Haryana, Chandigarh & Delhi, Chhattisgarh, Coastal Andhra Pradesh, Telangana, Tamilnadu, Karnataka and Kerala on many days; over Bihar, Punjab, Himachal Pradesh, Jammu & Kashmir, East Madhya Pradesh, Sub-Himalayan West Bengal & Sikkim and Lakshadweep on a few days; over Uttarakhand, East Rajasthan, Konkan & Goa, Madhya Maharashtra and Rayalaseema, Andaman & Nicobar Islands, Arunachal Pradesh, West Madhya Pradesh and Vidarbha on one or two days during the week. Rainfall: Very heavy rain observed at isolated places over Bihar on one day; heavy rain observed at isolated places over Tamilnadu & Puducherry and Kerala on many days; over Nagaland, Manipur, Mizoram & Tripura and Odisha for a few days and over Andaman & Nicobar Islands, Gangetic West Bengal, Assam & Meghalaya, West Uttar Pradesh, Coastal Andhra Pradesh, Coastal & North Interior Karnataka and Telangana for one or two days, LEGEND: Few days-3 days, Many days-4 to 5 days and Most days-6 to 7 days during the week. METEOROLOGICAL ANALYSIS Last week’s cyclonic circulation over Sub Himalayan West Bengal & adjoining Bihar lay over West Bengal neighbourhood and extended upto 0.9 km above mean sea level whereas the trough aloft ran from east Bihar to northeast Odisha across Gangetic West Bengal at 1.5 km above mean sea level on 10th May 2018. Both these systems became less marked on 11th May 2018. Last week’s cyclonic circulation over east Assam & neighbourhood extending upto 0.9 km above mean sea level has become less marked on 10th May 2018. Last week’s wind discontinuity from North Interior Karnataka to South Interior Tamilnadu across South Interior Karnataka extending upto 0.9 km above mean sea level became unimportant on 10th May 2018. Last week’s cyclonic circulation over Lakshadweep area and neighbourhood lay over Lakshadweep and adjoining southeast Arabian Sea and extended upto 3.1 km above mean sea level with a trough running from this system to North Interior Karnataka at 1.5 km above mean sea level on 10th May 2018. The cyclonic circulation lay over SouthEast Arabian Sea adjoining Lakshadweep and extended upto 3.1 km above mean sea level whereas the trough from this system to North Interior Karnataka at 1.5 km above sea level has become less marked on 11th. The cyclonic circulation persisted over the same area and extended upto 2.1 km above mean sea level on 12th and has become less marked on 13th . Last week’s cyclonic circulation over north Kerala & neighbourhood at 1.5 km above mean sea level has become less marked on 10th May 2018. Last week’s western Disturbance as a trough in mid-tropospheric levels with its axis at 5.8 km above mean sea level roughly along Long. 87°E to the north of Lat. 28°N has become less marked on 10th May 2018. Last week’s cyclonic circulation over Comorin area and neighbourhood persisted and extended upto 0.9km above mean sea level on 10th May 2018 and has become less marked on 11th. A north-south trough at 1.5 km above mean sea level ran from Uttarakhand to south Uttar Pradesh on 10th May 2018. It ran from northern parts of north East Uttar Pradesh to north Chhattisgarh and extended upto 0.9 km above mean sea level on 11th and has become less marked on 12th. A north-south trough ran from northwest Rajasthan to south Madhya Maharashtra across West Madhya Pradesh and extended upto 0.9 km above mean sea level on 10th May 2018. It ran from northwest Rajasthan to north Madhya Maharashtra with an embedded cyclonic circulation extending upto 0.9 km above sea level over southeast Rajasthan and adjoining West Madhya Pradesh & Gujarat on 11th. Both the systems became less marked on 12th. A Western Disturbance as a trough in mid & upper tropospheric levels with its axis at 5.8 km above mean sea level ran roughly along Long. 55°E to the north of Lat. 25°N on 11th May 2018. It ran roughly along Long. 60°E to the north of Lat. 28°N on 12th. It was seen as a cyclonic circulation over Jammu & Kashmir and neighbourhood at 3.1 km above mean sea level with a trough aloft with its axis at 5.8 km above sea level roughly along Long. 74°E to the north of Lat. 34°N on 13th and it moved away east-northeastwards on 14th. An east-west trough ran from east Bihar to Nagaland and extended upto 0.9 km above mean sea level on 11th May 2018. It ran from West Uttar Pradesh to Nagaland across East Uttar Pradesh, Bihar and Sub-Himalayan West Bengal at 1.5 km above mean sea level on 12th.It ran from the cyclonic circulation over south Haryana and neighbourhood extending upto 0.9 km anove sea level to Nagaland across north Madhya Pradesh, south Bihar, north Gangetic West Bengal and Meghalaya and extended upto 1.5 km above sea level on 13th and has become less marked on 14th . A north-south trough extended from Haryana to northwest Madhya Pradesh across East Rajasthan and extended upto 0.9 km above mean sea level on 12th May 2018. It ran from the cyclonic circulation over south Haryana and neighbourhood extending upto 0.9 km above sea level to Madhya Maharashtra across East Rajasthan and West Madhya Pradesh and extended upto 0.9 km above sea level on 13th ;ran from cyclonic circulation over central Pakistan & adjoining Punjab and northwest Rajasthan extending upto 0.9 km anove sea level to north Madhya Maharashtra across southeast Rajasthan and West Madhya Pradesh on 14th and has become less marked on 15th. Another north-south trough runs along Long. 88°E to the north of 22°N at 3.1 km above mean sea level on 13th May 2018. It ran roughly along Long. 88°E to the north of 24°N between 3.1 km & 3.6 km above mean sea level on 14th. It persisted and was seen between 5.8 km & 7.6 km above mean sea level on 15th and ran roughly along Long. 92°E to the north of 24°N between the same levels on 16th. A north-south wind discontinuity ran from Rayalaseema to south Tamilnadu and extended upto 0.9 km above mean sea level on 13th May 2018. It ran from Telangana to south Tamilnadu extending upto 0.9 km above sea level on 14th; ran from North Interior Karnataka to south Tamilnadu across South Interior Karnataka extending upto 0.9 km above sea level on 15th and ran from South Interior Karnataka to north Interior Tamilnadu and extended upto 0.9 km above sea level on 16th. A western disturbance as a trough in mid-tropospheric westerlies with its axis at 5.8 km above mean sea level ran roughly along Long. 60°E to the north of Lat. 30°N on 13th May 2018. It ran roughly along Long. 65°E to the north of lat. 30°N on 14th; ran roughly along Long. 76°E to the north of lat. 34°N on 15th and ran roughly along Long. 82°E to the north of lat. 34°N on 16th. A cyclonic circulation lay over central Pakistan & adjoining Punjab and northwest Rajasthan and extended upto 0.9 km above mean sea level on 14th with a north south trough from the circulation to north Madhya Maharashtra across southeast Rajasthan and West Madhya Pradesh on 14th May 2018. The cyclonic circulation extending upto 0.9 km above sea level persisted over the same region but the north south trough from the circulation to north Madhya Maharashtra has become less marked on 15th.The cyclonic circulation has become less marked on 16th. A low pressure area has formed over SouthWest Arabian Sea & neighbourhood and the associated cyclonic circulation extended upto 4.5 km above mean sea level on 14th May 2018; It lay as a Well marked low pressure area over the same region with associated cyclonic circulation extending upto 5.8 km above mean sea level on 15th.It lay over South West and adjoining West Central Arabian Sea and the Gulf of Aden with the associated cyclonic circulation extending upto 5.8 km above sea level on 16th Forenoon.It concentrated into a Depression and lay centred at 1730 hours IST of 16th May 2018 near Latitude 13.0 ₒ N anf Longitude 50.0 ₒ E, about 540 kms east northeast of Aden( Yeman) and 420 Km west northwest of Socotra island.