India Meteorological Department/ भारत मौसम विज्ञान विभाग

ACWC KOLKATA / ए .सी .डबब्लू .सी कोलकाता

Coastal Weather Bulletin

DAILY TWO Bulletin Valid for 12 hrs from 21 UTC of 2026-08-12 to 09 UTC of 2026-08-13

 
Synoptic Situation THE LOW PRESSURE AREA OVER THE NORTH BAY OF BENGAL OFF WEST BENGAL-BANGLADESH COASTS MOVED NORTHWESTWARDS AND LAY AS A WELL MARKED LOW PRESSURE AREA OVER NORTH BAY OF BENGAL & ADJOINING BANGLADESH-WEST BENGAL COASTS AT 1730 HRS IST OF TODAY, THE 12TH AUGUST 2026. THE ASSOCIATED CYCLONIC CIRCULATION EXTENDING UPTO 9.4 KM ABOVE MEAN SEA LEVEL. IT IS LIKELY TO MOVE NORTHWESTWARDS ACROSS GANGETIC WEST BENGAL TOWARDS JHARKHAND AND MAY CONCENTRATE INTO A DEPRESSION DURING NEXT 24 HOURS. SOUTHWEST MONSOON MODERATE TO STRONG OVER NORTHWEST BAY OF BENGAL. SOUTHWEST MONSOON MODERATE OVER ANDAMAN SEA.

 
Andaman area
Wind MAINLY SOUTHWESTERLY 15 TO 20 KNOTS GUSTING TO 25 KNOTS OVER NORTH ANDAMAN SEA AND MAINLY SOUTHWESTERLY 15 TO 20 KNOTS OVER SOUTH ANDAMAN SEA
Weather RAIN OR THUNDERSHOWER VERY LIKELY TO OCCUR AT MANY PLACES OVER ANDAMAN & NICOBAR COASTS.
Visibility MODERATE BECOMING POOR IN HEAVY RAIN/THUNDERSHOWER OVER NORTH ANDAMAN SEA. GOOD BECOMING MODERATE IN RAIN/THUNDERSHOWER OVER SOUTH ANDAMAN SEA.
Sea Condition SLIGHT TO MODERATE OCASSIONALLY ROUGH OVER ANDAMAN SEA.
Port Signal KEEP HOISTED LOCAL CAUTIONARY SIGNAL NO. 3 AT SRI VIJAYAPURAM PORT.
Storm Surge/Tidal Warning SWELL WAVES IN THE RANGE OF 16.0 - 19.0 SEC PERIOD WITH 1.9 - 2.7 M HEIGHT ARE FORECASTED UP TO 20:30 HOURS ON 13-08-2026. IT ADVISED THAT THERE IS A POSSIBILITY OF SURGING OF WAVES, BOATS TO PLY WITH UTMOST VIGILANCE, RECREATION WITH DUE CARE.

West Bengal coast
Wind CYCLONIC; 20 TO 25 KNOTS GUSTING TO 30 KNOTS.
Weather RAIN OR THUNDERSHOWER VERY LIKELY TO OCCUR AT MOST PLACES WITH HEAVY TO VERY HEAVY RAINFALL VERY LIKELY AT A FEW PLACES AND EXTREMELY HEAVY RAINFALL VERY LIKELY AT ONE OR TWO PLACES OVER WEST BENGAL COAST.
Visibility MODERATE BECOMING POOR IN HEAVY TO VERY HEAVY RAIN/THUNDERSHOWER.
Sea Condition MODERATE TO ROUGH OCASSIONALLY VERY ROUGH.
Port Signal KEEP HOISTED LOCAL CAUTIONARY SIGNAL NO. 3 AT HOOGHLY (KOLKATA & HALDIA) PORT WITH SECTIONAL SIGNAL NO-I AT SAGAR ISLAND PORT.
Storm Surge/Tidal Warning SWELL WAVES IN THE RANGE OF 15.0 - 21.0 SEC PERIOD WITH 1.2 - 1.4 M HEIGHT ARE FORECASTED UP TO 20:30 HOURS ON 13-08-2026. IT ADVISED THAT THERE IS A POSSIBILITY OF SURGING OF WAVES, BOATS TO PLY WITH UTMOST VIGILANCE, RECREATION WITH DUE CARE.

Time of Issue21:57 IST of 2026-08-12