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 2026-08-18 to 09 UTC of 2026-08-19

 
Synoptic Situation DEPRESSION OVER JHARKHAND MOVED SLOWLY WEST-NORTHWESTWARDS WITH A SPEED OF 3 KMPH DURING PAST 6 HOURS AND LAY CENTRED AT 1730 HRS IST OF TODAY, THE 18TH AUGUST, 2026, OVER THE SAME REGION, NEAR LATITUDE 24.1°N AND LONGITUDE 85.3°E, CLOSE TO NORTH-NORTHWEST OF HAZARIBAGH (JHARKHAND), 90 KM NORTH OF RANCHI (JHARKHAND), 80 KM SOUTH-SOUTHEAST OF GAYA (BIHAR), 130 KM EAST OF DALTONGANJ (JHARKHAND) AND 150 KM SOUTHEAST OF DEHRI (BIHAR).IT IS VERY LIKELY TO CONTINUE TO MOVE WEST-NORTHWESTWARDS ACROSS JHARKHAND & BIHAR AND WEAKEN INTO A WELL MARKED LOW PRESSURE AREA DURING NEXT 12 HOURS. SOUTHWEST MONSOON MODERATE OVER NORTHWEST BAY OF BENGAL AND ANDAMAN SEA..

 
Andaman area
Wind SOUTHWEST TO WESTERLY 15 TO 20 KNOTS OVER NORTH ANDAMAN SEA AND SOUTHWEST TO WESTERLY 15 TO 20 KNOTS GUSTING TO 25 KNOTS OVER SOUTH ANDAMAN SEA .
Weather RAIN OR THUNDERSHOWER VERY LIKELY TO OCCUR AT MANY PLACES OVER ANDAMAN & NICOBAR COASTS.
Visibility GOOD BECOMING MODERATE IN RAIN/THUNDERSHOWER OVER NORTH ANDAMAN SEA AND MODERATE BECOMING POOR IN RAIN/THUNDERSHOWER OVER SOUTH ANDAMAN SEA.
Sea Condition SLIGHT TO MODERATE OVER NORTH ANDAMAN SEA AND SLIGHT TO MODERATE OCASSIONALLY BECOMING ROUGH OVER SOUTH ANDAMAN SEA.
Port Signal NIL.
Storm Surge/Tidal Warning SWELL WAVES IN THE RANGE OF 17.0 - 22.0 SEC PERIOD WITH 2.7 - 3.2 M HEIGHT ARE FORECASTED DURING 17:30 HOURS ON 18-08-2026 TO 23:30 HOURS ON 20-08-2026. 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 MAINLY SOUTHWESTERLY 15 TO 20 KNOTS GUSTING TO 25 KNOTS.
Weather RAIN OR THUNDERSHOWER VERY LIKELY TO OCCUR AT MOST PLACES OVER WEST BENGAL COAST.
Visibility GOOD BECOMING MODERATE IN RAIN/THUNDERSHOWER.
Sea Condition SLIGHT TO MODERATE OCASSIONALLY BECOMING ROUGH.
Port Signal NIL.
Storm Surge/Tidal Warning SWELL WAVES IN THE RANGE OF 17.0 - 21.0 SEC PERIOD WITH 1.1 - 1.3 M HEIGHT ARE FORECASTED DURING 11:30 HOURS ON 19-08-2026 TO 23:30 HOURS ON 20-08-2026. IT ADVISED THAT THERE IS A POSSIBILITY OF SURGING OF WAVES, BOATS TO PLY WITH UTMOST VIGILANCE, RECREATION WITH DUE CARE.

Time of Issue21:14 IST of 2026-08-18