INDIA METEOROLOGICAL DEPARTMENT (MINISTRY OF EARTH SCIENCES)

SOUTHWEST MONSOON-2019 END OF SEASON REPORT

FOR UTTARAKHAND STATE

HIGHLIGHTS

For the state as a whole, the rainfall for the season (June-September) was 82% of its long period average (LPA) and thus categorized as a normal monsoon.

Monthly rainfall over Uttarakhand as a whole was 47% of LPA in June, 71% of LPA in July, 91% of LPA in August and 117% of LPA in September respectively.

Out of the total 13 districts of Uttarakhand 01 district received excess, 06 districts received normal and 06 districts received deficient seasonal rainfall.

Monsoon current advanced over Uttarakhand on 24th June 2019 about 2 day later than its normal date of 22ndJune and covered the entire State on the 05th July 2019.

The monsoon activity over Uttarakhand was normal during the season (June-September). South-West Monsoon withdrew from the entire State on 11th October 2019.

1. ONSET OF SOUTHWEST MONSOON – 2019

The southwest (SW) monsoon 2019 set in over Kerala on 08th June, 7 days later than its normal date of 1st June. It advanced over some parts of Kumaun region of Uttarakhand on 24th June. It advanced further over most parts of Uttarakhand on 02nd July and covered the entire state on 05th July 2019. Fig.1 shows the isochrones of advance of SW Monsoon 2019.

Fig.1 Isochrones of advance of SW Monsoon 2019

2. CHIEF SYNOPTIC FEATURES OF SW MONSOON - 2019:

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

24.06.2019

South-West monsoon advanced into some parts of Kumaun region of Uttarakhand on 24th

June, 2019.

The trough at mean sea level ran from northwest Rajasthan to Nagaland across East Rajasthan, North Madhya Pradesh, Bihar, Sub Himalayan West Bengal & Assam.

A cyclonic circulation extending upto 0.9 km above mean sea level laid over East Rajasthan & adjoining West Madhya Pradesh.

The Western disturbance as a cyclonic circulation between 3.1 and 3.6 km above mean sea level over north Pakistan & adjoining Jammu & Kashmir persisted. A trough aloft ran with its axis at 5.8 km above mean sea level roughly along Long. 68°E to the north of Lat. 30°N.

Light to moderate rainfall/thunderstorm occurred at many places in Uttarakhand. Very heavy rainfall occurred at isolated places in Uttarakhand. Pantnagar-15

25.06.2019

Northern Limit of Monsoon (NLM) passed through Lat. 21°N/Long. 60°E, Lat. 21°N/Long. 65°E, Veraval, Surat, Indore, Mandla, Pendra, Sultanpur, Lakhimpur Kheri, Mukteshwar and Lat. 31°N/Long. 80°E.

The trough at mean sea level ran from Punjab to Nagaland across south Haryana, south Uttar Pradesh, Bihar, Sub Himalayan West Bengal and Assam.

The cyclonic circulation over south Gujarat & neighbourhood laid over Gujarat region & adjoining areas of north Madhya Maharashtra and West Madhya Pradesh between 1.5 & 2.1 km above mean sea level.

The Western disturbance as a cyclonic circulation between 3.1 and 3.6 km above mean sea level over north Pakistan & adjoining Jammu & Kashmir became less marked. However, the trough aloft with its axis at 5.8 km above mean sea level roughly along Long. 72°E to the north of Lat. 30°N persisted.

A cyclonic circulation laid over Punjab & adjoining areas of Haryana & northwest Rajasthan and extending upto 3.1 km above mean sea level.

The cyclonic circulation over East Madhya Pradesh & neighbourhood between 3.1 and 3.6 km above mean sea level became less marked.

The cyclonic circulation extending upto 0.9 km above mean sea level over East Rajasthan & adjoining West Madhya Pradesh became less marked.

Light to moderate rainfall/thunderstorm occurred at many places in Uttarakhand. Heavy rainfall occurred at isolated places in Uttarakhand. Kalsi-9,Haripur-8,Munsiyari-8

23.07.2019

The monsoon trough at mean sea level passed through Phalodi, Tonk, Gwalior, Banda, Mirzapur, Patna, Purnea & thence Eastwards to Nagaland.

The cyclonic circulation over northern parts of Punjab & neighbourhood laid over Punjab & neighbourhood and seen between 4.5 & 5.8 km above mean sea level.

Very light to moderate rainfall/thunderstorm occurred at many places in Uttarakhand. Heavy to very heavy rainfall occurred at isolated places in Uttarakhand. Jakholi-13, Uttarkashi-8

24.07.2019

The monsoon trough at mean sea level passed through Bikaner, Alwar, Gwalior, Hamirpur, Varanasi, Burdwan, Haldia & thence to Northwest Bay of Bengal.

The cyclonic circulation over Punjab & neighbourhood laid over Haryana & adjoining West Uttar Pradesh at 5.8 km above mean sea level.

Very light to moderate rainfall/thunderstorm occurred at most places in Uttarakhand. Heavy to very heavy rainfall occurred at isolated places in Uttarakhand. Haldwani-16, Haripur-11, Kalsi-10, Didihaat-10, Dunda-10, Uttarkashi-9, Berinaag-7

25.07.2019

The monsoon trough at mean sea level passed through Ganganagar, Hissar, Agra, Sultanpur, Patna, Krishnanagar and thence southeastwards to Northwest Bay of Bengal and extending upto 0.9 km above mean sea level.

The cyclonic circulation over Haryana & adjoining West Uttar Pradesh laid over south Haryana & neighbourhood and seen between 5.8 & 7.6 km above mean sea level.

A Western Disturbance as a cyclonic circulation between 4.5 & 5.8 km above mean sea level laid over western parts of Afghanistan & neighbourhood.

Very light to moderate rainfall/thunderstorm occurred at most places in Uttarakhand. Heavy rainfall occurred at isolated places in Uttarakhand. Chandra Badni (AWS)-7

26.07.2019

The monsoon trough at mean sea level passed through Phalodi, Alwar, Agra, Banda, Churk, Gaya, Purulia, centre of Low Pressure Area over northwest Bay of Bengal & adjoining coastal West Bengal and thence south-eastwards to east central Bay of Bengal and extending upto 1.5 km above mean sea level.

A trough ran from the cyclonic circulation associated with the low pressure area to north Rajasthan across Jharkhand, north Chhattisgarh and cyclonic circulation over south Uttar Pradesh & neighbourhood between 3.1 & 7.6 km above mean sea level tilting southwards with height.

The cyclonic circulation over south Haryana & neighbourhood between 5.8 & 7.6 km above mean sea level merged with the above trough.

The cyclonic circulation over Northeast Uttar Pradesh & neighbourhood laid over south Uttar Pradesh & neighbourhood extending upto 5.8 km above mean sea level tilting south-westwards with height.

The Western Disturbance as a cyclonic circulation between 4.5 & 5.8 km above mean sea level over Afghanistan & neighbourhood laid over northeast Afghanistan & adjoining north Pakistan.

Light to moderate rainfall/thunderstorm occurred at most places in Uttarakhand. Heavy rainfall occurred at isolated places in Uttarakhand. Banbasa- 8, Dehradun (CWC) – 7

01.08.2019

The monsoon trough at mean sea level passed through Phalodi, Ajmer, Guna, centre of Low Pressure Area over central parts of north Madhya Pradesh & neighbourhood, Daltonganj, Jamshedpur, Digha and thence southeastwards to east central Bay of Bengal and extending upto 2.1 km above mean sea level.

The cyclonic circulation over southwest Rajasthan & neighbourhood extending upto 3.6 km above mean sea level, tilting southwestwards with height moved away westwards.

Very light to moderate rainfall occurred at many places in Uttarakhand. Heavy rainfall occurred at isolated places in Uttarakhand. Mussoorie(AWS)-8, Rudraprayag(AWS)-7

02.08.2019

The monsoon trough at mean sea level passed through Anupgarh, Narnaul, Agra, Nowgong, Siddhi, Ambikapur, Sambalpur, Paradip and thence south-eastwards to eastcentral Bay of Bengal and extending upto 1.5 km above mean sea level.

The cyclonic circulation over northwest Madhya Pradesh & neighbourhood laid over south Uttar Pradesh and neighbourhood and extending upto 0.9 km above mean sea level.

The trough from south Rajasthan to Northwest Bay of Bengal ran from Gujarat to the cyclonic circulation over north coastal Odisha & neighbourhood across north Maharashtra and Chhattisgarh between 3.1 & 5.8 km above mean sea level tilting southwards with height.

A cyclonic circulation between 1.5 & 2.1 km above mean sea level laid over Punjab and neighbourhood.

Light to moderate rainfall occurred at most places in Uttarakhand. Heavy rainfall occurred at isolated places in Uttarakhand. Sahaspur(AWS)-11, Chorgalia(AWS)-9, Laksar- 7, Kalagarh(AWS)-7, Chopta(AWS)-7

03.08.2019

The monsoon trough at mean sea level passed through Bikaner, Jaipur, Nowgong, Siddhi, Chaibasa, Digha and thence southeastwards to eastcentral Bay of Bengal and extending upto 1.5 km above mean sea level.

The cyclonic circulation over south Uttar Pradesh and neighborhood extending upto 0.9 km above mean sea level merged with the monsoon trough.

The cyclonic circulation over Punjab and neighborhood persisted and seen between 3.1 & 3.6 km above mean sea level.

A cyclonic circulation laid over Central Pakistan & neighbourhood and extending upto 1.5 km above mean sea level.

A Western Disturbance as a trough in upper tropospheric westerlies ran with its axis at 7.6 km above mean sea level roughly along Long. 70°E to the north of Lat. 34°N.

Very light to moderate rainfall occurred at many places in Uttarakhand. Heavy to very heavy rainfall occurred at isolated places (District Pauri Garhwal) in Uttarakhand Kalagarh (AWS)-12

04.08.2019

The monsoon trough at mean sea level passed through Bikaner, Jaipur, Gwalior, Allahabad, Gaya, Bankura, Digha and thence southeastwards to north Bay of Bengal and extending upto 1.5 km above mean sea level.

The cyclonic circulation over Punjab and neighborhood between 3.1 & 3.6 km above mean sea level persisted.

The cyclonic circulation over Central Pakistan & neighbourhood extending upto 1.5 km above mean sea level became less marked.

The trough from south Gujarat to the cyclonic circulation over northwest Bay of Bengal ran from south Gujarat to the cyclonic circulation over Bangladesh across Madhya Pradesh and Jharkhand between 3.1 & 5.8 km above mean sea level tilting southwards with height.

The Western Disturbance as a trough in upper tropospheric westerlies with its axis at 7.6 km above mean sea level roughly along Long. 76°E to the north of Lat. 34°N persisted.

Light to moderate rainfall occurred at a few places in Uttarakhand. Heavy rainfall occurred at isolated places in Uttarakhand Kapkot-11, Soneprayag(AWS)-9, Song(AWS)-9, Sahaspur(AWS)-9, Dehradun(CWC)-7, and Chopta (ASG)-7

05.08.2019

The monsoon trough at mean sea level passed through Anupgarh, Sikar, Nowgong, Ambikapur, Chaibasa, Midnapur and thence to the center of low pressure area over North Bay of Bengal & neighbourhood and extending upto 1.5 km above mean sea level.

The cyclonic circulation over Punjab and neighborhood between 3.1 & 3.6 km above mean sea level became less marked.

The Western Disturbance as a trough in upper tropospheric westerlies with its axis at 7.6 km above mean sea level roughly along Long. 76°E to the north of Lat. 34°N persisted.

Light to moderate rainfall occurred at most places, heavy to very heavy rainfall occurred at a few places and extremely heavy rainfall occurred at isolated places in Uttarakhand Banbasa (CWC)-27, Kapkot-17, Haridwar (CWC)-13, Chalthi (AWS)-13, Kotdwar (AWS)-12, Kotdwar-11, Berinag-11, Ukhimath (AWS)-11, Kalsi (AWS)-10, Lansdown (AWS)-10, Tharali (AWS)-9, Chorgalia (AWS)-9, Ukhimath-9, Dharchula-9, Dangoli (AWS)-9, Chamoli-8, Khatima (AWS)-8, Haripur-8, Rani Mazra (AWS)-8, Vikasnagar (ARG)-8, Munsiyari-8, Haridwar (AWS)-8, Shama (AWS)-7, Niranjanpur (AWS)-7, Kaladhungi (AWS)-7, Raiwala (AWS)-7

06.08.2019

The Well Marked Low Pressure area over North Bay of Bengal and adjoining coastal areas of Bangladesh & West Bengal concentrated into a Depression and lay centered at 0830 hours IST of today, the 6th August, 2019, over northwest Bay of Bengal off north Odisha West Bengal coasts near Lat 20.5°N & Long 88.0°E, above 160 km southeast of Balasore (Odisha) and about 130 km south-southeast of Digha (West Bengal).

The monsoon trough at mean sea level passed through Ganganagar, Hissar, Mainpuri, Mirzapur, Ranchi, Jamshedpur and thence to the centre of the Depression over northwest Bay of Bengal and extending upto 1.5 km above mean sea level.

A cyclonic circulation extending upto 1.5 km above mean sea level laid over Haryana & neighbourhood embedded in the Monsoon trough.

The trough from south Gujarat ran upto the cyclonic circulation associated with the Depression over northwest Bay of Bengal across north Maharashtra, south Chhattisgarh and south Odisha and extending between 3.6 & 7.6 km above mean sea level tilting southwards with height.

The feeble offshore trough at mean sea level from south Gujarat coast to north Kerala coast persisted.

Light to moderate rainfall/Thunderstorm occurred at most places in Uttarakhand. Heavy rainfall occurred at isolated places in Uttarakhand. Kalagarh(AWS)-7

08.08.2019

The Depression over northeast Chhattisgarh & neighbourhood moved west northwest wards with a speed of about 33 kmph in last six hours and lay centred at 0830 hours IST of 08th August, 2019, over north Chhattisgarh & neighbourhood near Latitude 23.0°N and Longitude 82.9°E about 40km west northwest of Ambikapur (Chhattisgarh), about 250 km west of Ranchi (Jharkhand) and about190 km south southeast of Sidhi (East Madhya Pradesh.

The cyclonic circulation over northwest Madhya Pradesh & neighbourhood between 3.1 & 4.5 km above mean sea level became less marked.

A cyclonic circulation laid over central Pakistan & neighbourhood at 1.5 km above mean sea level.

A trough between 3.1 & 7.6 km above mean sea level ran from southwest Rajasthan to northwest Bay of Bengal across Madhya Pradesh, cyclonic circulation associated with the Depression over north Chhattisgarh & neighbourhood and Odisha tilting southwards with height.

Light to moderate rainfall occurred at most places in Uttarakhand. Heavy to Very Heavy rainfall occurred at isolated places in Uttarakhand. Nandkesari-13, Kapkot-13, Nandprayag-11, Ganganagar-10, Jakholi-9, Ukhimath-9, Soneprayag (AWS)-8, Chamoli-7, Mussoorie-7, Dunda-7, Koti (AWS)-7, Song (AWS)-7

11.08.2019

The Well Marked Low Pressure Area over northern parts of Saurashtra & Kutch persisted. Associated cyclonic circulation extended upto 5.8 km above mean sea level tilting southwestward with height.

The monsoon trough at mean sea level passed through center of well marked low pressure area over northern parts of Saurashtra & Kutch, Chittorgarh, Shivpuri, Hamirpur, Patna, Purulia, Digha and thence southeastwards to eastcentral Bay of Bengal.

A Western Disturbance as a trough in mid & upper westerlies at 5.8 km above mean sea level ran roughly along Long. 65°E to the north of Lat. 31°N.

The cyclonic circulation over North Bay of Bengal & neighbourhood laid over northeast & adjoining eastcentral Bay of Bengal and neighbourhood between 3.1 & 5.8 km above mean sea level. Under the influence of this cyclonic circulation a Low Pressure Area was likely to form over northwest Bay of Bengal & neighbourhood during subsequent 48 hours.

Light to moderate rainfall/thunderstorm occurred at most places and heavy to very heavy rainfall occurred at a few places in Uttarakhand. Nandkesari (AWS)-14, Haldwani (AWS)- 13, Dehradun-13, Narendra Nagar (AWS)-12, Kashipur (AWS)-10, Chamoli-10, Kapkot-9, Gangolihat (AWS)-8, Garud-7, Pant Nagar-7, Birahi (AWS)-7

16.08.2019

The Well Marked Low Pressure Area over northeast Rajasthan and adjoining areas of northwest Madhya Pradesh and southwest Uttar Pradesh with the associated cyclonic circulation extending upto 7.6 km above mean sea level tilting south-westwards with height persisted.

The monsoon trough at mean sea level passed through Bikaner, centre of Well Marked Low Pressure Area over northeast Rajasthan and adjoining areas of northwest Madhya Pradesh and southwest Uttar Pradesh, Rewa, Hazaribagh, Shanti Niketan and thence eastnortheastwards to Nagaland across Bangladesh & south Assam.

The trough from the cyclonic circulation associated with the Well Marked Low Pressure Area to north Gujarat Region ran from the cyclonic circulation associated with the Well Marked Low Pressure Area to Gujarat Region between 3.6 & 4.5 km above mean sea level.

A fresh Western Disturbance as a trough in mid & upper tropospheric westerlies ran with its axis at 5.8 km above mean sea level roughly along Long 62°E to the north of Lat 30°N.

The other Western Disturbance as a trough in midtropospheric westerlies with its axis at 5.8 km above mean sea level roughly along Long 68°E to the north of Lat 32°N moved away north-eastwards.

Very light to moderate rainfall/thunderstorm occurred at most places in Uttarakhand and heavy rainfall occurred at isolated places in Uttarakhand. Joshimath(AWS)-9, Dehradun(CWC)-8, Devprayag(CWC)-7, Harsil(AWS)-7

17.08.2019

The Well Marked Low Pressure Area over south Haryana & adjoining northeast Rajasthan laid as Low Pressure Area over the same region. The associated cyclonic circulation extended upto 5.8 km above mean sea level.

The monsoon trough at mean sea level passed through Anupgarh, centre of Low Pressure Area over south Haryana & adjoining northeast Rajasthan, Gwalior, Satna, Daltonganj, Bankura, Krishnanagar and thence south-eastwards to northeast Bay of Bengal.

The trough from the cyclonic circulation associated with the Low Pressure Area to Gujarat Region between 3.6 & 4.5 km above mean sea level became less marked.

The Western Disturbance as a trough in mid & upper tropospheric westerlies with its axis at 5.8 km above mean sea level roughly along Long 66°E to the north of Lat 32°N persisted.

Light to moderate rainfall/thunderstorm occurred at most places in Uttarakhand. Heavy to very heavy rainfall occurred at isolated places in Uttarakhand. Koti (AWS)-17, Haldwani-11, Nagthat (AWS)-11, Nainidanda (AWS)-11, Chakrata (AWS)-10, Bhimtal (AWS)-9, Munsiyari-9, Syunsi (AWS)-7, Dhari (AWS)-7, Tuini (AWS)-7, Deoprayag (CWC)-7, Nainital-7

18.08.2019

The Low Pressure Area over central parts of Haryana persisted. The associated cyclonic circulation extended upto 4.5 km above mean sea level.

Under the influence of cyclonic circulation over West Bengal and adjoining Bangladesh, a low pressure area formed over central parts of Gangetic West Bengal & adjoining Jharkhand. The associated cyclonic circulation extended upto 7.6 km above mean sea level tilting southwards with height.

The monsoon trough at mean sea level passed through Amritsar, centre of Low Pressure Area over central parts of Haryana, Fatehgarh, Gorakhpur, Gaya, and centre of low pressure area over central parts of Gangetic West Bengal & adjoining Jharkhand and thence east southeastwards to northeast Bay of Bengal.

The cyclonic circulation between 1.5 km & 3.1 km above mean sea level over Kutch & neighbourhood became less marked.

The Western Disturbance as a trough in mid & upper tropospheric westerlies with its axis at 5.8 km above mean sea level ran roughly along Long 70°E to the north of Lat 30°N.

Light to moderate rainfall/thunderstorm occurred at most places in Uttarakhand. Heavy to very heavy rainfall occurred at isolated places in Uttarakhand. Marora- 12, Gairsain-10, Syunsi-9(AWS), Satpuli(AWS)-9, Thailisain (AWS)-8, Chinyalisaur-8 Karnprayag-7, Banbasa-7, Nandkesari -7, Nainital-7, Uttarkashi-7, Deoprayag-7, Someshwar-7, Berinag-7, Nainidanda(AWS)-7, Sult(AWS)-7

30.08.2019

The monsoon trough at mean sea level passed through Jaisalmer, Sikar, Gwalior, Sidhi, Ambikapur, Jharsuguda, Bhubaneshwar and thence southeastwards to eastcentral Bay of Bengal

and extending upto 0.9 km above mean sea level.

The Western Disturbance as a cyclonic circulation over north Pakistan & neighbourhood

between 3.1 km & 3.6 km above mean sea level laid over eastern parts of Jammu & Kashmir

and was moving away east-northeastwards.

Light to moderate rainfall/thundershowers occurred at many places and heavy rainfall occurred at isolated places in Uttarakhand. Uttarkashi-11, Haripur-10, Kalsi-8, Tiuni -7

31.08.2019

The monsoon trough at mean sea level passed through Bikaner, Jaipur, Guna, Pendra Road, Sambalpur, Gopalpur and thence southeastwards to north Andaman Sea and extending upto 0.9 km above mean sea level.

A cyclonic circulation laid over north Haryana & neighbourhood extending upto 0.9 km above mean sea level.

A fresh Western Disturbance as a trough in mid westerlies ran with its axis at 5.8 km above mean sea level roughly along Long 65°E to the north of 30°N.

Light to moderate rainfall/thunderstorm occurred at most places in Uttarakhand. Heavy to Very Heavy rainfall occurred at isolated places in Uttarakhand. Pantnagar-13, Haldwani-12, Sataynarayan (Haridwar)-10, Haripur-9, Banbasa-8, Uttarkashi-7, Didihat-7

06.09.2019

The monsoon trough at mean sea level passed through Jaisalmer, Kota, Guna, Jabalpur, Pendra Road, Jharsuguda, centre of low pressure area over north coastal Odisha & adjoining Gangetic West Bengal and thence southeastwards to eastcentral Bay of Bengal and extending upto 2.1 km above mean sea level tilting southwards with height.

The cyclonic circulation extending upto 1.5 km above mean sea level over East Madhya Pradesh & neighbourhood merged with above monsoon trough.

The cyclonic circulation between 3.1 km & 3.6 km above mean sea level over north Haryana & neighbourhood became less marked.

Light to moderate rainfall/thunderstorm occurred at many places in Uttarakhand. Heavy to very heavy rainfall occurred at isolated places in Uttarakhand Roorkee-13, Kotdwar-12, Ranimazra(ARG)-8, Nainidanda(AWS)-7, Jollygrant-7, Dehradun-7, Nandkesari-7 and Raiwala(AWS)-7

07.09.2019

The monsoon trough at mean sea level passed through Jaisalmer, Ajmer, Raisen, Pendra Road, centre of low pressure area over north Odisha & neighbourhood and thence south eastwards to eastcentral Bay of Bengal and extending upto 1.5 km above mean sea level tilting southwards with height.

A cyclonic circulation laid over central Pakistan & neighbourhood and extends upto 1.5 km above mean sea level.

A Western Disturbance as a cyclonic circulation laid over west Afghanistan & neighbourhood at 3.1 km above mean sea level.

Very light to moderate rainfall/thunderstorm occurred at a few places in Uttarakhand. Heavy rainfall occurred at isolated places in Uttarakhand Ukhimath-11, Munsiyari-8

28.09.2019

The cyclonic circulation over southwest Uttar Pradesh & neighbourhood laid over south Uttar Pradesh & adjoining north Madhya Pradesh and extending upto 4.5 km above mean sea level.

A cyclonic circulation extending upto 0.9 km above mean sea level laid over central Pakistan & adjoining northwest Rajasthan.

The cyclonic circulation over south Pakistan & adjoining west Rajasthan extending upto 0.9 km above mean sea level became less marked.

The Western Disturbance as a cyclonic circulation over eastern parts of Jammu & Kashmir at 3.1 km above mean sea level moved away eastnortheastwards.

Light to moderate rainfall/thunderstorm occurred at most places in Uttarakhand. Heavy rainfall occurred at isolated places in Uttarakhand. Deoprayag-13, Pauri-10, Mussoorie-9, Dhanaulti-9, U.T.U.(ARG)-9, Jollygrant-8, Koti(AWS)-8, Gangolihat(AWS)-8, Dehradun-8, Nagthat(AWS)-8, Tehri(CWC)-7, Pithoragarh-7, Nainidanda (AWS)-7, Sahaspur(AWS)-7

29.09.2019

The Well Marked Low Pressure Area over Gulf of Kutch & neighbourhood persisted, however the associated cyclonic circulation extended upto 7.6 km above mean sea level.

A cyclonic circulation at 5.8 km above mean sea level laid over Punjab & neighbourhood.

The trough extending upto 3.1 km above mean sea level from cyclonic circulation over south Uttar Pradesh to northeast Bay of Bengal ran from Punjab to south Assam across Haryana, southwest Uttar Pradesh, cyclonic circulation, over southeast Uttar Pradesh, Bihar & Sub Himalayan West Bengal and extending upto 3.1 km above mean sea level.

The cyclonic circulation extending upto 0.9 km above mean sea level over central Pakistan & adjoining northwest Rajasthan became less marked.

Light to moderate rainfall/thunderstorm occurred at most places in Uttarakhand. Heavy rainfall occurred at isolated places in Uttarakhand Dharchula-9,Kalsi-8,Haripur-8,Dhanolti-7, Chakrata(AWS)-7

30.09.2019

The cyclonic circulation over Punjab & neighbourhood persisted and extended upto 5.8 km above mean sea level.

The cyclonic circulation over southeast Uttar Pradesh & neighbourhood persisted and extended upto 3.6 km above mean sea level and a trough aloft at 4.5 km above mean sea level ran roughly along latitude 23.0°N and longitude 85.0°E

The trough extending upto 3.1 km above mean sea level from Punjab to south Assam ran from cyclonic circulation over Punjab to south Assam across Haryana, West Uttar Pradesh, cyclonic circulation over southeast Uttar Pradesh, Bihar & Sub-Himalayan West Bengal.

Light to moderate rainfall/thunderstorm occurred at most places in Uttarakhand. Very heavy rainfall occurred at isolated places in Uttarakhand Haldwani-16

3. WITHDRAWAL OF SOUTHWEST MONSOON:

The rainfall activity was normal in Uttarakhand during the SW Monsoon season. The withdrawal of SW monsoon 2019 may be

attributed as the most delayed withdrawal in recorded history of SW monsoon, which this year commenced on 9th October, 2019

from west Rajasthan, Haryana & Punjab with a change in the lower tropospheric circulation pattern. The change in the wind flow

pattern over Uttarakhand from southeasterly to northwesterly and the development of anti-cyclonic circulation over west Rajasthan

in lower levels made conditions favorable for the further withdrawal of southwest monsoon from most parts of Rajasthan, some

parts of Madhya Pradesh, most parts of Uttar Pradesh, some parts of Uttarakhand, remaining parts of Haryana and most parts of

Punjab on 10th October. Consequently, SW monsoon withdrew from the entire state of Uttarakhand on 11th October, 2019 and

entire country on 16th October 2019 with the simultaneous onset of Northeast monsoon rainfall over the south Peninsula. Fig.3

shows the isochrones of withdrawal of SW Monsoon 2019.

Fig.3: Isochrones of withdrawal of Monsoon 2019

4. RAINFALL DISTRIBUTION OVER UTTARAKHAND DURING MONSOON – 2019:

The rainfall during SW monsoon season (June to September) for the State as a whole is as follows: Met. Sub-division/ State Actual Rainfall June-

September (in mm) Normal/Long Period Average (LPA)Rainfall June-September(in mm)

Departure from normal (in %)

Uttarakhand 960.4 1176.9 -18

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 this year 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 82% of its LPA. The seasonal rainfall intensity distribution over the State was in the categories of excess,

46 % 46 %

8 %

NORMAL

DEFICIENT

LARGE DEFICIENT

EXCESS

normal and deficient. Out of 13 districts of Uttarakhand 01 district received excess, 06 districts received normal and 06 districts

received deficient seasonal rainfall. In terms of area 08% area received excess, 46% area received normal and 46% area received

deficient rainfall. In totality, the monsoon rainfall was normal (-18%) over the state.

5. INTENSITY DISTRIBUTION OF RAINFALL DURING MONSOON-2019 OVER UTTARAKHAND:

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/ State

Month Actual Rainfall (in mm)

Normal or Long period average (LPA) ( in

mm)

Departure from normal (in %)

Uttarakhand June-2019 84.3 177.8 -53

July- 2019 288.8 407.7 -29

August- 2019 360.1 397.7 -9

September-2019 227.2 193.7 17

From the above table, the monthly rainfall was normal over the state during August & September and deficient in June &

July. The June rainfall was 47%, July 71%, August 91% and September 117% of their respective monthly LPAs. The amount of

rainfall (in terms of % of LPA) was maximum in September and minimum in June. This year 08% area of Uttarakhand received

excess, 46% area received normal and 46% area received deficient rainfall. In this way, the performance of monsoon 2019 was

normal (82%) 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:

0

10

20

30

40

50

60

1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29

NO

. OF

STA

TIO

NS

DATE

UTTARAKHAND RAINFALL INTENSITY DISTRIBUTION

MONSOON SEASON - 2019

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

Fig.6: Weekly Monsoon Rainfall-2019 over Uttarakhand

The weekly monsoon rainfall was more than normal over the State on 3 occasions, 2 in August and 1 in September; normal

on 5 occasions, 1 in June, 1 in July, 2 in August and 1 in September and it was less than normal on other weeks. In terms of

percentage departure from normal, the weekly rainfall was large excess (≥ +60%) during 1 week, excess (+20 to +59 %) during 2

weeks, normal (-19% to +19%) during 5 weeks, deficient (-20% to -59%) during 7 weeks and large deficient (-60% to -99%) during

3 weeks. Thus, week by week monsoon rainfall performance was average.

Fig.7 Weekly departure of the Monsoon Rainfall 2019 over Uttarakhand

Week Ending 5

Jun- 12

Jun- 19

Jun- 26

Jun- 03

Jul- 10

Jul- 17

Jul- 24

Jul- 31

Jul- 07

Aug- 14

Aug- 21

Aug- 28

Aug- 4

Sep- 11

Sep- 18

Sep- 25

Sep- 30

Sep-

Departure -14 -47 -84 -24 -73 -22 5 -71 -23 -4 -9 21 -50 24 -38 -8 -49 571

12.4 17.1

5.9

43.0

17.6

67.0

101.7

26.0

82.4

90.9 90.3

113.5

40.1

80.9

37.2 45.4

19.7

69.1

14.4

32.4 36.4

56.4

64.7

86.4

97.2

91.0

106.6

94.9

99.5

94.1

80.1

65.1

59.6

49.3

38.5

10.3

0.0

20.0

40.0

60.0

80.0

100.0

120.0

5 Jun- 12 Jun-

19 Jun-

26 Jun-

03 Jul- 10 Jul- 17 Jul- 24 Jul- 31 Jul- 07 Aug-

14 Aug-

21 Aug-

28 Aug-

4 Sep- 11 Sep-

18 Sep-

25 Sep-

30 Sep-

Actual

Normal

Rai

nfa

ll (i

n m

m)

Week Ending

%

De

pa

rtu

re

Week Ending

8. DISTRICT-WISE SPATIAL DISTRIBUTION OF RAINFALL DURING MONSOON 2019

Fig.8 District wise Spatial Distribution of Rainfall during monsoon 2019 over Uttarakhand

The maximum number of rainfall days was over Pithoragarh district (109 days) and minimum rainfall days were over

Hardwar district (55 days). Widespread to fairly widespread rainfall occurred on 50 days or more (maximum) in Bageshwar,

Chamoli, Dehradun, Garhwal Tehri, Nainital, Pithoragarh, Rudraprayag and Uttarkashi districts and 35 days (minimum) over

Hardwar district.

9. DISTRICT-WISE HEAVY RAINFALL DISTRIBUTION DURING MONSOON 2019

Fig.9 District wise Heavy Rainfall distribution during monsoon 2019 over Uttarakhand

The maximum number of heavy rainfall days was over Pithoragarh district (13 days) and minimum over Almora district (1

day).

21

0 12

0

17 20 11

0

18 7

0 0 14

16

25

16 33

24 21

11 20

18

14 20 20

21

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18 20

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13 18

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33 39

46

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34

20

38

17

38 68 52

23

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0

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100

120

ALM

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L TE

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UD

HA

M S

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H N

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UTT

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DISTRICTS

MONSOON-2019 SPATIAL RAINFALL DISTRIBUTION

UTTARAKHAND

ISOL SCT MANY MOST

1

5 6

3 4

7

12

3 4

1

5

1

1

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1

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5 4

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L P

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NA

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D

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DISTRICTS

MONSOON-2019 HEAVY RAINFALL DISTRIBUTION UTTARAKHAND

ISOL FEW MANY MOST

10. DISTRICTS WISE RAINFALL DISTRIBUTION (JUNE-SEPTEMBER) 2019:

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

Serial No

State/ Districts Actual Rainfall June-September (in mm)

Normal/ Long period average (LPA) Rainfall June-September ( in mm)

Departure from normal (in %)

1. Almora 700.4 842.7 -17

2. Bageshwar 1204.5 842.7 43

3. Chamoli 840.9 776 8

4. Champawat 1051.2 1338 -21

5. Dehradun 1092 1524.6 -28

6. Garhwal Pauri 711.7 1225.1 -42

7. Garhwal Tehri 612.6 990.2 -38

8. Hardwar 697.2 971.2 -28

9. Nainital 1287.8 1425 -10

10. Pithoragarh 1411.3 1544.9 -9

11. Rudraprayag 1260.6 1484.5 -15

12. Udham Singh Nagar 962 1073.6 -10

13. Uttarkashi 769.5 1208.4 -36

Out of 13 districts, 6 districts viz. Champawat, Dehradun, Garhwal Pauri, Garhwal Tehri, Hardwar and Uttarkashi received

the deficient; 6 districts viz. Almora, Chamoli, Nainital, Pithoragarh, Rudraprayag and Udham Singh Nagar received the normal and

1 district viz. Bageshwar received excess rainfall in varying intensity. The actual rainfall of the season was highest over Pithoragarh

(1411.3 mm) and lowest over Garhwal Tehri (612.6) districts. However, in terms of % of the normal rainfall/ LPA, Bageshwar district

received the maximum 143% and Garhwal Pauri minimum 58%. Thus, monsoon 2019 has been a normal (-18%) monsoon year for

Uttarakhand.

11. Monthly district-wise rainfall (in mm) over Uttarakhand during Monsoon Season-2019

S.N. State/ Districts June (in

mm) Departure (%) June

July (in mm)

Departure (%) July

Aug (in mm)

Departure (%) Aug

Sept (in mm)

Departure (%) Sept

1 Almora 77 -49 179.4 -34 288.9 10 155.1 1

2 Bageshwar 84 -45 246.2 -10 523.5 99 350.8 128

3 Chamoli 50.3 -50 209.1 -22 381.5 35 200 60

4 Champawat 98.4 -54 267.5 -43 371.7 -8 313.7 28

5 Dehradun 89.8 -50 336.3 -39 364.6 -33 301.3 22

6 Garhwal Pauri 23.1 -86 202.6 -52 314.6 -29 171.5 -14

7 Garhwal Tehri 67.2 -50 192.3 -44 233 -33 120.1 -25

8 Hardwar 21.1 -82 262.9 -21 266.7 -26 146.5 -10

9 Nainital 134.4 -42 498 1 363.8 -17 291.7 10

10 Pithoragarh 133.7 -48 423 -22 478.4 -3 376.1 48

11 Rudraprayag 101.8 -51 351.2 -33 554.7 -1 252.9 30

12 Udham Singh Nagar 136 -10 328.3 -13 245.3 -29 252.4 27

13 Uttarkashi 84.6 -59 243.2 -41 317 -22 124.7 -30

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

12. Weekly district-wise rainfall (in mm) over Uttarakhand during Monsoon Season-2019

Week Ending 5 Jun-

12 Jun-

19 Jun-

26 Jun-

03 Jul-

10 Jul-

17 Jul-

24 Jul-

31 Jul-

07 Aug-

14 Aug-

21 Aug-

28 Aug-

4 Sep-

11 Sep-

18 Sep-

25 Sep-

30 Sep-

ALMORA 11.6 19.3 2.3 43.8 1.2 27.0 64.4 26.8 60.3 60.2 28.9 101.9 85.5 44.3 18.3 12.8 40.4 52.0

BAGESHWAR 17.5 4.2 5.8 55.7 1.7 74.8 45.5 35.0 90.0 206.0 140.0 82.5 77.5 103.3 69.2 150.0 3.3 42.5

CHAMOLI 17.2 6.7 2.9 23.2 0.3 21.7 105.4 26.5 55.7 70.8 130.7 136.7 27.6 86.4 21.0 37.8 11.5 59.0

CHAMPAWAT 15.6 20.3 2.0 48.0 24.5 68.5 82.5 22.0 82.5 209.1 28.3 110.3 20.0 82.5 69.2 71.0 50.0 45.0

DEHRADUN 3.9 3.7 38.7 39.6 35.6 104.6 73.4 15.8 110.9 62.9 116.8 106.2 47.6 69.8 43.2 41.9 36.7 140.7

GARHWAL PAURI 2.7 10.5 4.3 5.7 17.9 53.9 75.4 7.8 47.6 91.6 61.5 114.9 33.7 27.6 37.3 27.8 22.4 69.5

GARHWAL TEHRI 3.3 11.2 4.2 46.3 13.7 69.3 57.5 4.3 49.6 40.4 62.2 117.4 10.4 6.6 7.8 0.0 11.4 93.5

HARIDWAR 0.0 18.1 2.6 0.3 17.0 32.1 169.3 0.7 43.8 131.9 55.7 46.2 12.4 27.9 50.5 54.3 9.3 24.9

NAINITAL 14.0 39.5 8.5 67.1 50.0 94.5 197.6 37.6 123.7 70.1 14.2 187.8 47.0 139.2 36.6 58.4 40.8 61.3

PITHORAGARH 22.8 36.3 4.9 55.8 20.5 108.3 159.2 28.8 120.1 145.7 117.5 107.6 56.0 121.8 82.0 106.2 18.2 99.6

RUDRAPRAYAG 39.3 32.1 5.8 13.7 13.6 69.7 74.9 78.8 125.0 144.9 196.1 109.6 89.2 55.3 47.4 37.0 11.5 116.6

U.S NAGAR 0.0 30.8 0.1 104.8 14.0 107.2 169.8 15.3 22.2 85.3 63.9 66.9 20.0 164.8 30.2 42.7 13.9 9.9

UTTARKASHI 10.4 1.9 3.1 54.2 19.0 57.5 38.0 37.6 106.2 36.4 109.3 104.6 27.8 82.0 11.6 4.2 9.3 56.5

< 10 mm 10-20 mm 20-50 mm 50-100 mm >100 mm

13. Rainfall Map of Monsoon-2019 of different Districts of Uttarakhand Met Sub-division:

PERIOD: 01.06.2019 – 30.09.2019