WWIN40 DEMS 120900

IWB (MORNING) DATED 12-09-2020



THE MONSOON TROUGH AT MEAN SEA LEVEL NOW PASSES THROUGH PHALODI,
SIKAR, HARDOI, PATNA, BURDWAN AND THENCE EASTWARDS TO MANIPUR
ACROSS BANGLADESH AND ASSAM. THE OFF-SHORE TROUGH AT MEAN SEA
LEVEL FROM NORTH MAHARASHTRA COAST TO NORTH KERALA COAST PERSISTS.
THE CYCLONIC CIRCULATION OVER EASTCENTRAL ARABIAN SEA OFF KARNATAKA
COAST NOW LIES OVER EASTCENTRAL ARABIAN SEA OFF MAHARASHTRA COAST
AND EXTENDS UPTO 3.1 KM ABOVE MEAN SEA LEVEL TILTING SOUTHWESTWARDS
WITH HEIGHT. THE EAST-WEST SHEAR ZONE ROUGHLY ALONG 15ON ACROSS
PENINSULAR INDIA NOW SEEN AT 5.8 KM ABOVE MEAN SEA LEVEL. THE TROUGH
IN MID TROPOSPHERIC WESTERLIES WITH ITS AXIS AT 5.8 KM ABOVE MEAN
SEA LEVEL NOW LIES AS A CYCLONIC CIRCULATION OVER SOUTH AFGHANISTAN
& NEIGHBOURHOOD BETWEEN 3.1 & 5.8 KM ABOVE MEAN SEA LEVEL. A
CYCLONIC CIRCULATION LIES OVER WEST-CENTRAL BAY OF BENGAL OFF
ANDHRA PRADESH COAST AND EXTENDS UPTO 3.1 KM ABOVE MEAN SEA LEVEL.
UNDER ITS INFLUENCE, A LOW PRESSURE AREA IS LIKELY TO FORM OVER
WESTCENTRAL BAY OF BENGAL OFF ANDHRA PRADESH COAST BY TOMORROW.
ANOTHER CYCLONIC CIRCULATION LIES OVER JAMMU & KASHMIR AND
NEIGHBOURHOOD BETWEEN 3.1 & 3.6 KM ABOVE MEAN SEA LEVEL. THE TROUGH
FROM BIHAR TO SOUTH CHHATTISGARH ACROSS JHARKHAND HAS BECOME LESS
MARKED.

FORECAST:

RAIN/THUNDERSHOWER AT MOST PLACES OVER VIDARBHA, SUB-HIMALAYAN WEST
BENGAL & SIKKIM, ARUNACHAL PRADESH, ASSAM & MEGHALAYA, NAGALAND,
MANIPUR, MIZORAM & TRIPURA, KONKAN & GOA, COASTAL ANDHRA PRADESH &
YANAM, TELANGANA, KARNATAKA STATE, KERALA AND LAKSHADWEEP; AT MANY
PLACES OVER CHATTISGARH, BIHAR, ODISHA, ANDAMAN & NICOBAR ISLANDS,
GUJRAT REGION, SAURASTRA & KUTCH, MADHYA MAHARASTRA, MARATHWADA AND
RAYALSEEMA; AT A FEW PLACES OVER WEST MADHYA PRADESH, EAST MADHYA
PRADESH, JHARKHAND AND GANGETIC WEST BENGAL AND AT ISOLATED PLACES
OVER UTTRAKHAND, UTTER PRADESH, RAJASTHAN AND TAMILNADU, PUDUCHERRY
& KARAIKAL (.)

DRY WEATHER PREVAIL REST OF THE COUNTRY (.)

WARNING: 12 SEPTEMBER (DAY 1): HEAVY TO VERY HEAVY RAINFALL VERY
LIKELY AT ISOLATED PLACES OVER SAURASHTRA & KUTCH, KONKAN & GOA,
COASTAL ANDHRA PRADESH & YANAM AND KERALA & MAHE; HEAVY RAINFALL AT
ISOLATED PLACES OVER SOUTHWEST MADHYA PRADESH, VIDARBHA, SOUTH
CHHATTISGARH, BIHAR, SUB-HIMALAYAN WEST BENGAL & SIKKIM, ODISHA,
ARUNACHAL PRADESH, ASSAM & MEGHALAYA, GUJARAT REGION, MADHYA
MAHARASHTRA, TELANGANA, RAYALSEEMA, KARNATAKA AND TAMILNADU,
PUDUCHERRY & KARAIKAL.

THUNDERSTORM ACCOMPANIED WITH LIGHTNING VERY LIKELY AT ISOLATED
PLACES OVER EAST UTTAR PRADESH, MADHYA PRADESH, VIDARBHA,
CHHATTISGARH, BIHAR, JHARKHAND, GANGETIC WEST BENGAL, ODISHA,
ARUNACHAL PRADESH, ASSAM & MEGHALAYA, NAGALAND, MANIPUR, MIZORAM &
TRIPURA, MADHYA MAHARASHTRA, MARATHWADA, KONKAN & GOA, COASTAL
ANDHRA PRADESH & YANAM, TELANGANA, RAYALASEEMA, COASTAL & NORTH
INTERIOR KARNATAKA AND TAMILNADU, PUDUCHERRY & KARAIKAL.

STRONG WIND (SPEED REACHING 45-55 KMPH) VERY LIKELY OVER SOUTHWEST
ARABIAN SEA. SQUALLY WEATHER (WIND SPEED REACHING 45-55 KMPH) OVER
NORTHEAST AND EASTCENTRAL ARABIAN SEA; ALONG & OFF MAHARASHTRA-SOUTH
GUJARAT COASTS; SOUTHWEST AND WESTCENTRAL BAY OF BENGAL & ALONG
& OFF ANDHRA PRADESH COAST; AND (WIND SPEED REACHING 40-50 KMPH)
ALONG & OFF KERALA-KARNATAKA COASTS AND LAKSHADWEEP AREA. FISHERMEN
ARE ADVISED NOT TO VENTURE INTO THESE AREAS.


13 SEPTEMBER (DAY 2): HEAVY TO VERY HEAVY RAINFALL VERY LIKELY AT
ISOLATED PLACES OVER ODISHA, KONKAN & GOA, COASTAL ANDHRA PRADESH &
YANAM, TELANGANA, SOUTH INTERIOR KARNATAKA AND KERALA & MAHE; HEAVY
RAINFALL AT ISOLATED PLACES OVER SOUTH MADHYA PRADESH, VIDARBHA,
CHHATTISGARH, BIHAR, SUB-HIMALAYAN WEST BENGAL & SIKKIM, ARUNACHAL
PRADESH, ASSAM & MEGHALAYA, GUJARAT STATE, MADHYA MAHARASHTRA,
RAYALSEEMA AND COASTAL & NORTH INTERIOR KARNATAKA.

MODERATE THUNDERSTORM ACCOMPANIED WITH LIGHTNING VERY LIKELY AT
ISOLATED PLACES OVER EAST UTTAR PRADESH AND THUNDERSTORM ACCOMPANIED
WITH LIGHTNING VERY LIKELY AT ISOLATED PLACES OVER MADHYA PRADESH,
VIDARBHA, CHHATTISGARH, BIHAR, JHARKHAND, GANGETIC WEST BENGAL,
ASSAM & MEGHALAYA, COASTAL ANDHRA PRADESH & YANAM, TELANGANA,
RAYALASEEMA, COASTAL & NORTH INTERIOR KARNATAKA AND TAMILNADU,
PUDUCHERRY & KARAIKAL.

STRONG WIND (SPEED REACHING 45-55 KMPH) VERY LIKELY OVER SOUTHWEST
ARABIAN SEA. SQUALLY WEATHER (WIND SPEED REACHING 45-55 KMPH) OVER
NORTHEAST AND EASTCENTRAL ARABIAN SEA; ALONG & OFF MAHARASHTRA
COAST; WESTCENTRAL BAY OF BENGAL & ALONG & OFF ANDHRA PRADESH
COAST; AND (WIND SPEED REACHING 40-50 KMPH) ALONG & OFF
KERALA-KARNATAKA COASTS AND LAKSHADWEEP AREA. FISHERMEN ARE ADVISED
NOT TO VENTURE INTO THESE AREAS.=
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