MONTHLY REPORT FOR JULY ( PUNJAB AND HARYANA)

PUNJAB:

In July month Punjab State received 185.2mm of rainfall against it normal rainfall of 176.2 which is 5 % more

than its long period average (LPA). Rainfall in six districts mostly in northeast parts of Punjab was deficient

whereas rainfall in remaining districts was normal to excess. Rainfall reported in July month is highest in last

10 year as this is highest rainfall since 2010 wherein rainfall reported in July month was 207 mm.

HARYANA:

In July Haryana state received 166.3 mm of rainfall against it normal of 156.3 which was 6 % higher than

normal. Seven districts received deficient to scanty rainfall whereas rainfall was normal to excess in remaining

district. In Haryana also rainfall reported in July 2020 was highest since 2010 as state received 166.3 mm of

rainfall wherein rainfall in year 2010 was 175.2 mm. District wise percentage rainfall departure maps for Punjab

and Haryana are given below in fig.1. District wise actual, normal and percentage departure of rainfall for

Punjab and Haryana are shown below in tables.

Fig1

HARYANA STATE DISTRICTS ACTUAL NORMAL DEP AMBALA 161.3 303.8 -47

BHIWANI 96.4 122 -21

CHANDIGARH 277.1 283.3 -2

FARIDABAD 208.8 190.1 10

FATEHABAD 138 98.1 41

GURGAON 150 179 -16

HISAR 150.3 111.6 35

JHAJJAR 164.8 137.3 20

JIND 178.4 139.7 28

KAITHAL 304.8 122.2 149

KARNAL 365.2 193.7 89

KURUKSHETRA 289.5 184.8 57

MAHENDRAGARH 91 151.7 -40

MEWAT 87.5 159 -45

PALWAL 101 140.9 -28

PANCHKULA 109 317.8 -66

PANIPAT 153.3 163.3 -6

REWARI 49.7 150.3 -67

ROHTAK 95.8 179 -46

SIRSA 128.4 89.1 44

SONEPAT 241.5 184.5 31

YAMUNA NAGAR 273.8 289.8 -6

SUBDIVISION RAINFALL 166.3 156.8 6

PUNJAB STATE

DISTRICTS ACTUAL NORMAL DEP AMRITSAR 160.2 194.8 -18

BARNALA 252.6 128.8 96

BHATINDA 160.9 115.2 40

FARIDKOT 225.9 116.5 94

FATEHGARH SAHIB 228.7 204.7 12

FEROZEPUR 109.6 124.2 -12

GURDASPUR 249.3 329.1 -24

HOSHIARPUR 84.5 259.1 -67

JALANDHAR 147.4 221.6 -33

KAPURTHALA 150 139.3 8

LUDHIANA 177.6 180.6 -2

MANSA 65.5 99.7 -34

MOGA 106.9 110.8 -4

MUKTSAR 225 111.3 102

NAWANSHAHAR 175 297 -41

PATIALA 239.8 202.7 18

ROPAR 274.4 274.3 0

SANGRUR 325.7 150.1 117

SAS NAGAR (MOHALI) 173.1 209.1 -17

TARN TARAN 80.4 125.1 -36

SUBDIVISION RAINFALL 185.2 176.2 5

HEAVY TO VERY HEAVY RAINFALL EVENTS IN PUNJAB AND HARYANA IN JULY 2020.

In the month of July 2020 three events of heavy to very heavy rainfall occurred in Punjab and Haryana

during 11th to 12th July , 20th and 21st and 28th to 29th July 2020 respectively. Broad synoptic,

thermodynamic and numerical features associated with heavy to very heavy rainfall event

during 20 to 21st July 2020 are given below

INTRODUCTION: Heavy to very heavy rainfall occurred in some district of southwest, Southeast and

Northwest, Punjab and also in parts of South and Northwest Haryana during 20th and 21st July. Rainfall was

mainly confined to Southwest, Central and Southeast, Punjab and Northwest, West and Southern parts of

Haryana. District received heavy to vey heavy rainfall are Mukatsar,Mansa,Bahtinda,Ferozpur,Sangrur, in

Punjab and Faridabad Rohtak Sirsa,Hisar Kurukshetra in Haryana during 20-21st July 2020. District wise

departures of rainfall from normal for Punjab, Haryana during 20th and 21st July 2020 are shown in fig below.

( Fig 2.)

Broad Synoptic features of Heavy to very heavy rainfall during 20th and 21st July 2020:

20th July: The monsoon trough at mean sea level was passing through Amritsar, Ludhiana, Meerut, Bareilly,

Gorakhpur, Bhagalpur and eastern end was close to the foothills of the Himalayas

21st July: The monsoon trough at mean sea level shifted slightly southward and passed through

Ganganagar, Delhi,Hardoi and Gorakhpur and the eastern part was still close to the foothills of the

Himalayas

20th July: The trough in mid tropospheric westerlies with its axis at 7.6 km above mean sea level was

roughly along Long.70°E to the north of Lat. 32°N.

21st July: The trough in mid-tropospheric westerlies was seen with its axis between 3.1and 7.6 km above

mean sea level roughly along Long. 70°E to the north of Lat. 25°N. Subtropical Westerly Jet Stream which

usually remain further northward 45 deg N during Northern Hemisphere Summer was also seen around 32-

35 deg N modulating westerly wind flow and also triggered thunderstorm activities in Punjab and Haryana

accompanied with squall and enhanced rainfall activities during 20th and 21st July 2020.

Heavy to very heavy rainfall events during 20th and 21st July 2020 was due to the following:

Location of Monsoon trough over central parts of the Punjab and Haryana Lead to large moisture

convergence over the southern and South western parts of the Punjab and Haryana on 20th of July. Strong

moisture influx from Arabian Sea and also trough in westerly in the mid troposphere level associated with

Subtropical Westerly Jet stream with its positions near 32-35 deg N further enhanced the convection due to

interaction of lower level easterly and upper level Westerly leading to heavy to very heavy rainfall in the

region.Thundermodynamic indices also indicated instability in the region during this period.

Location of Monsoon Trough as seen in GFS analysis (MSLP)

925hpa GFS analysis

Westerly trough in Middle Tropospher as seen in 500 hpa geopotential contours and wind fields.

Westerly trough in Middle Tropospher as seen in 500 hpa geopotential contours and wind fields.

Satellite derived convergence(meterosat-8) in the lower level showing convergence of the order of 40-50 ×10-5 s-1 at 1500UTC of 20th July

Satellite derived divergence(meterosat-8) in the middle level showing divergence of the order of 30 ×10-5 s-1at 1500UTC of 20th July

CLOUD SYSTEM SEEN IN IR1 CHANNEL

DAILY ACCUMULATED RAINFALL (HE & IMSRA) AND AVERAGE OLR.

The Daily OLR product depicting active weather activity over Punjab and Haryana on 20th and 21st July 2020.

Same can be seen in daily HE and IMSRA products with widespread rainfall over Punjab and Haryana on 20th

and 21st July 2020.

DWR PRODUCTS DATED 20TH AND 21ST JULY 2020

Weather forecast /warning issued by Meteorological Centre, Chandigarh to Govt

of Punjab and Haryana including impact of heavy to very heavy rainfall events

during 20 to 21st July . Dissemination of the same including social media platform

and ground reports as reported by media of the impact of timely forecast and

warning issued by MC,Chandigarh are given in next page.

Dissemination of forecast/warning through social media

Outreach: SMS, WhatsApp, Twitter & Facebook

GROUND REPORTS AS REPORTED BY MEDIA OF IMPACT BASED

FORECAST ISSUED BY MC, CHANDIGARH

PUNJAB

HARYANA

Media Reports