Cyclone Warning for West Bengal...less impact expected in Sub Himalayan West Bengal and Sikkim.. may have heavy rain
It is very likely to move north-northeastwards across northwest Bay of Bengal and cross West Bengal –Bangladesh coasts between Digha (West Bengal) and Hatiya Islands (Bangladesh) close to Sundarbans during Afternoon to Evening hours of 20th May 2020 with maximum sustained wind speed of 155-165kmph gusting to 185kmph.The system is now being continuously tracked by the Doppler Weather Radar (DWR) at Vishakhapatnam (Andhra Pradesh), Paradip (Odisha) and Gopalpur (Odisha).
Forecast track and intensity are given in the following table:
Date/Time(IST)
|
Position
(Lat. °N/ long.
°E)
|
Maximum sustained surface wind speed
(Kmph)
|
Category of cyclonic disturbance
|
19.05.20/1730
|
18.14/87.1
|
185-195 gusting to 215
|
Extremely Severe Cyclonic Storm
|
19.05.20/2330
|
18.7/87.3
|
180-190 gusting to 210
|
Extremely Severe Cyclonic Storm
|
20.05.20/0530
|
19.8/87.5
|
170-180 gusting to 200
|
Extremely Severe Cyclonic Storm
|
20.05.20/1130
|
20.9/87.98
|
160-170 gusting to 190
|
Extremely Severe Cyclonic Storm
|
20.05.20/1730
|
22.1/88.3
|
150-160 gusting to 180
|
Very Severe Cyclonic Storm
|
21.05.20/0530
|
24.10/89.2
|
80-90 gusting to 100
|
Cyclonic Storm
|
21.05.20/1730
|
25.10/90.0
|
40-50 gusting to 60
|
Depression
|
WARNINGS:
(1) Heavy rainfall Warning:
Gangetic West Bengal:Coastal districts of Gangetic West Bengal (East Medinipur, South & North 24 Parganas) are likely to experience light to moderate rainfall at many places tonight.Rainfall intensity is likely to increase gradually and become maximum on 20th May.Rainfall at most places with heavy to very heavy falls (07-20cm) ata few places over all the districts of Gangetic West Bengal with extremely heavy falls(>20 cm)at East & West Midnapur, North & South 24 Paraganas, Howrah, Hooghly and Kolkata of Gangetic West Bengal on 20th May.Heavy rain at one or two places over North & South 24 Parganas, Nadia and Murshidabad districts of Gangetic West Bengal on 21st May, 2020.
Sub-Himalayan West Bengal:Light to moderate rainfall at most places with heavy to very heavy falls (07-20cm)at a few places over Malda, North & South Dinajpur on 20th May,2020 and overall the districts of Sub-Himalayan West Bengal & Sikkim on 21st May, 2020.
(ii)Fishermen Warning:Fishermen are advised not to venture into NorthBay of Bengal along and off North Odisha, West Bengal and adjoining Bangladesh coasts upto 21st May, 2020.
(iii)Wind Warning:
Gangetic West Bengal:Squally wind speed reaching 55 to 65 kmph gusting to 75 kmph is likely to commence along and off West Bengal coast from tonight. The wind speed will gradually increase becoming gale wind speed reaching 75 to 85 kmph gusting to 95 kmph from 20th morning along and off districts of North & South 24-Parganas, East Midnapur, Howrah, Hooghly, Kolkata districts of West Bengal. It will gradually increase thereafter becoming110 to 120 kmph gusting to 130kmph over WestMidnapur, Howrah, Hooghly, Kolkata districts of West Bengal and wind speed of 155 to165 kmph gusting to 185kmph over the districts of North & South 24-Parganas and East Midnapur from the afternoon to night of 20th May 2020. Rest districts of Gangetic West Bengal will experience wind speed of 45 to 55 kmph gusting to 65 kmph likely on 20th May,2020 afternoon to evening.
Sub-Himalayan West Bengal:Squally wind speed reaching 40to 50kmph gusting to 60kmph is likely to commence over districts of Malda and North & South Dinajpur likely to commence from afternoon /night of 20th May,2020.
(iv)Deep Sea area wind warning : Gale wind speed reaching 190-200 gusting to 220 kmphis prevailing over westcentral and adjoining northwestBay of Bengal. Gale wind speed reaching 170-180 gusting to 200kmph is likely to prevail over northern parts of central Bay of Bengal and adjoining North Bay of Bengal from the morning of 20th May. It will gradually decrease becoming 155-165 kmph gusting to 185kmph over NorthBay of Bengal during landfall.
(v)Sea condition: Sea condition is Phenomenal and is veryl ikely to continue for next 12hours over Westcentral Bay and adjoining northwestBay of Bengal.It will become Phenomenal over north Bay of Bengal and adjoining central Bay of Bengal from morning of 20th May 2020.
(vi)Storm Surge expected: Storm Surge of about 4-5meters above Astronomical Tide is likely to inundate low lying areas of south & north 24 Parganas and about 3-4 meters over the low lying areas of East Medinipur District of West Bengal during the time of Landfall (figure enclosed).
(v)Port Warning: Great Danger Signal -10 kept hoisted at Hooghly Port and Sectional Signal No. II& III replaced by Sectional Signal No. II& I at Sagar Island Port.
(vi)Warning for Kolkata and adjoining Area :Light to moderate rain with squally wind speed reaching 75-85 kmph gusting to 95 kmph during morning hours of 20th May, 2020.Heavy to very heavy rain accompanied with gale wind speed 110-120 kmph gusting to 130 kmph during the time of landfall ( 20th May, 2020 afternoon to night).
(vii)Damage Expected and Action suggested:West Bengal (East Medinipur, South & North 24 Parganas, Howrah, Hoogli, Kolkata districts)
Damage Expected:
Extensive damage to all types of kutcha houses, some damage to old badly managed Pucca structures. Potential threat from flying objects.
Extensive uprooting of communication and power poles.
Disruption of rail/road link at several places.
Extensive damage to standing crops, plantations, orchards.
Blowing down of Palm and coconut trees.
Uprooting of large bushy trees.
Large boats and ships may get torn from their moorings.
Action Suggested:
Total suspension of fishing operations upto 21st May 2020.
Diversion or suspension of rail and road traffic.
People in affected areas to remain indoors. Mobilise evacuation from Low lying areas.
Movement in motor boats and small ships not advisable.
Total suspension of water borne activities in beach areas of West Bengal coast.
All the establishment and market of Kolkata and adjoining area may be closed and public movement may be restricted on 20th May 2020.
(viii)Post Landfall Outlook:After the landfall the system is very likely to continue to move north-northeastwards, across Gangetic West Bengal & Bangladesh and weaken gradually. It is likely to maintain the intensity of Cyclonic Storm till the morning of 21stMay and thereafter it will weaken into a Deep Depression over Bangladesh.Under its influence gale wind speed reaching 70-80 kmph gusting to 90 kmph likely over interior Districts (Murshidabad & Nadia) of Gangetic West Bengal during 20th night to 21st morning.Light to moderate rainfall at most paces with isolated heavy falls very likely over interior Districts of Gangetic West Bengal on 21st May, 2020.Light to moderate rainfall at most places with heavy to very heavy falls at a few places over Malda & Dinajpur districts on 20th May and over most of the districts of Sub-Himalayan West Bengal & Sikkim on 21st May, 2020.
(ix)Damage Expected and Action suggested for interior districts of Gangetic West Bengal.
(i) Minor damage to power and communication lines.
(ii) Major damage to Kutcha and some damage to Pucca roads.
(iii) Breaking of tree branches, uprooting of small trees.
(iv) Damage to banana and papaya trees.
(v) People in affected areas to remain indoors.
Gangetic West Bengal:Coastal districts of Gangetic West Bengal (East Medinipur, South & North 24 Parganas) are likely to experience light to moderate rainfall at many places tonight.Rainfall intensity is likely to increase gradually and become maximum on 20th May.Rainfall at most places with heavy to very heavy falls (07-20cm) ata few places over all the districts of Gangetic West Bengal with extremely heavy falls(>20 cm)at East & West Midnapur, North & South 24 Paraganas, Howrah, Hooghly and Kolkata of Gangetic West Bengal on 20th May.Heavy rain at one or two places over North & South 24 Parganas, Nadia and Murshidabad districts of Gangetic West Bengal on 21st May, 2020.
Sub-Himalayan West Bengal:Light to moderate rainfall at most places with heavy to very heavy falls (07-20cm)at a few places over Malda, North & South Dinajpur on 20th May,2020 and overall the districts of Sub-Himalayan West Bengal & Sikkim on 21st May, 2020.
(ii)Fishermen Warning:Fishermen are advised not to venture into NorthBay of Bengal along and off North Odisha, West Bengal and adjoining Bangladesh coasts upto 21st May, 2020.
(iii)Wind Warning:
Gangetic West Bengal:Squally wind speed reaching 55 to 65 kmph gusting to 75 kmph is likely to commence along and off West Bengal coast from tonight. The wind speed will gradually increase becoming gale wind speed reaching 75 to 85 kmph gusting to 95 kmph from 20th morning along and off districts of North & South 24-Parganas, East Midnapur, Howrah, Hooghly, Kolkata districts of West Bengal. It will gradually increase thereafter becoming110 to 120 kmph gusting to 130kmph over WestMidnapur, Howrah, Hooghly, Kolkata districts of West Bengal and wind speed of 155 to165 kmph gusting to 185kmph over the districts of North & South 24-Parganas and East Midnapur from the afternoon to night of 20th May 2020. Rest districts of Gangetic West Bengal will experience wind speed of 45 to 55 kmph gusting to 65 kmph likely on 20th May,2020 afternoon to evening.
Sub-Himalayan West Bengal:Squally wind speed reaching 40to 50kmph gusting to 60kmph is likely to commence over districts of Malda and North & South Dinajpur likely to commence from afternoon /night of 20th May,2020.
(iv)Deep Sea area wind warning : Gale wind speed reaching 190-200 gusting to 220 kmphis prevailing over westcentral and adjoining northwestBay of Bengal. Gale wind speed reaching 170-180 gusting to 200kmph is likely to prevail over northern parts of central Bay of Bengal and adjoining North Bay of Bengal from the morning of 20th May. It will gradually decrease becoming 155-165 kmph gusting to 185kmph over NorthBay of Bengal during landfall.
(v)Sea condition: Sea condition is Phenomenal and is veryl ikely to continue for next 12hours over Westcentral Bay and adjoining northwestBay of Bengal.It will become Phenomenal over north Bay of Bengal and adjoining central Bay of Bengal from morning of 20th May 2020.
(vi)Storm Surge expected: Storm Surge of about 4-5meters above Astronomical Tide is likely to inundate low lying areas of south & north 24 Parganas and about 3-4 meters over the low lying areas of East Medinipur District of West Bengal during the time of Landfall (figure enclosed).
(v)Port Warning: Great Danger Signal -10 kept hoisted at Hooghly Port and Sectional Signal No. II& III replaced by Sectional Signal No. II& I at Sagar Island Port.
(vi)Warning for Kolkata and adjoining Area :Light to moderate rain with squally wind speed reaching 75-85 kmph gusting to 95 kmph during morning hours of 20th May, 2020.Heavy to very heavy rain accompanied with gale wind speed 110-120 kmph gusting to 130 kmph during the time of landfall ( 20th May, 2020 afternoon to night).
(vii)Damage Expected and Action suggested:West Bengal (East Medinipur, South & North 24 Parganas, Howrah, Hoogli, Kolkata districts)
Damage Expected:
Extensive damage to all types of kutcha houses, some damage to old badly managed Pucca structures. Potential threat from flying objects.
Extensive uprooting of communication and power poles.
Disruption of rail/road link at several places.
Extensive damage to standing crops, plantations, orchards.
Blowing down of Palm and coconut trees.
Uprooting of large bushy trees.
Large boats and ships may get torn from their moorings.
Action Suggested:
Total suspension of fishing operations upto 21st May 2020.
Diversion or suspension of rail and road traffic.
People in affected areas to remain indoors. Mobilise evacuation from Low lying areas.
Movement in motor boats and small ships not advisable.
Total suspension of water borne activities in beach areas of West Bengal coast.
All the establishment and market of Kolkata and adjoining area may be closed and public movement may be restricted on 20th May 2020.
(viii)Post Landfall Outlook:After the landfall the system is very likely to continue to move north-northeastwards, across Gangetic West Bengal & Bangladesh and weaken gradually. It is likely to maintain the intensity of Cyclonic Storm till the morning of 21stMay and thereafter it will weaken into a Deep Depression over Bangladesh.Under its influence gale wind speed reaching 70-80 kmph gusting to 90 kmph likely over interior Districts (Murshidabad & Nadia) of Gangetic West Bengal during 20th night to 21st morning.Light to moderate rainfall at most paces with isolated heavy falls very likely over interior Districts of Gangetic West Bengal on 21st May, 2020.Light to moderate rainfall at most places with heavy to very heavy falls at a few places over Malda & Dinajpur districts on 20th May and over most of the districts of Sub-Himalayan West Bengal & Sikkim on 21st May, 2020.
(ix)Damage Expected and Action suggested for interior districts of Gangetic West Bengal.
(i) Minor damage to power and communication lines.
(ii) Major damage to Kutcha and some damage to Pucca roads.
(iii) Breaking of tree branches, uprooting of small trees.
(iv) Damage to banana and papaya trees.
(v) People in affected areas to remain indoors.
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