GMDSS BULLETIN I 200900
ISSUED BY: INDIA METEOROLOGICAL DEPARTMENT, NEW DELHI
HIGH SEA FORECAST FOR MET. AREA VIII (N)
AREA OF COVERAGE: AREA OF THE INDIAN OCEAN ENCLOSED BY LINES FROM THE
INDO-
PAKISTAN FRONTIER AT 23O45\U2019N 68 DEG E TO 00 DEG N 6 DEG E, THECE
TO CAPE
GARDAFUI; THE EAST AFRICAN COAST SOUTH TO THE EQUATOR, THENCE TO 95
DEG E, TO
6 DEG N, THENCE NORTH EASTWARDS TO MYANMAR/THAIL FRONTIER IN 10 DEG N
98 DEG
30\U2019E NORTHWARDS COVERING ENTIRE BAY OF BENGAL.
VALID FROM 09 UTC OF 20 TH OCTOBER 2026 TO 00 UTC OF 22 ND OCTOBER
2026.
PART-I STORM WARNING: NIL.
PART-II SYNOPTIC WEATHER SYSTEM AT 0300 UTC:
THE WELL MARKED LOW PRESSURE AREA OVER SOUTHWEST ARABIAN PERSISTED
OVER THE
SAME REGION AT 0300 UTC OF TODAY, THE 20 TH OF OCTOBER 2026. THE
ASSOCIATED
CYCLONIC CIRCULATION EXTENDS UPTO 7.6KM ABOVE MEAN SEA LEVEL. IT IS
VERY LIKELY
TO CONTINUE TO MOVE WEST-NORTHWESTWARDS MAINTAINING ITS INTENSITY OF
WELL
MARKED LOW-PRESSURE AREA DURING NEXT 12 HOURS. THEREAFTER, IT IS
LIKELY TO
CONTINUE TO MOVE FURTHER WEST-NORTHWESTWARDS AS A LOW-PRESSURE AREA
TILL
21 ST AND THEN WEST-SOUTHWESTWARDS TOWARDS SOMALIA COAST ON 22 ND
OCTOBER.
THE UPPER AIR CYCLONIC CIRCULATION OVER SOUTHWEST BAY OF BENGAL AND
ADJOINING
TAMIL NADU COAST EXTENDING UPTO 5.8 KM ABOVE MEAN SEA LEVEL PERSISTS.
UNDER ITS
INFLUENCE A LOW-PRESSURE AREA IS LIKELY TO FORM OVER THE SAME REGION
DURING
NEXT 24 HOURS.
THE UPPER AIR CYCLONIC CIRCULATION OVER GULF OF THAILAND &
NEIGHBOURHOOD LAY
OVER GULF OF THAILAND AND ADJOINING THAILAND & MYANMAR AND
EXTENDS UPTO 4.5 KM
ABOVE MEAN SEA LEVEL AT 0300 UTC OF TODAY, 20 TH OCTOBER. IT IS
LIKELY TO EMERGE INTO
NORTH ANDAMAN SEA BY TOMORROW, 21 ST OCTOBER MORNING. THEREAFTER IT
WILL MOVE
WEST-NORTH-WESTWARDS AND UNDER ITS INFLUENCE A LOW-PRESSURE AREA IS
LIKELY TO
FORM OVER SOUTHEAST AND ADJOINING EAST-CENTRAL BAY OF BENGAL AROUND
23 RD
OCTOBER 2026. THEN IT IS LIKELY TO MOVE NORTH-WESTWARDS AND INTENSIFY
FURTHER.
PART-III AREA FORECAST:
AREA: ARB A1 (ARABIAN SEA)-EQUATOR TO 10 DEG N W OF 80 DEG E.
ARB A1-FORECAST VALID FROM 09 UTC OF 20 TH OCT 2026 TO 00 UTC OF 21
ST OCT 2026.
I) WIND DIRECTION AND SPEED: 1) W OF 70 DEG E: NE/N-LY 10/15 KTS BEC
CYCLONIC 10/15
KTS AT 06 DEG N AND 60 DEG E.
2) REST AREA: SE-LY 05/10 KTS TO THE S OF 7 DEG N
REST AREA NW/W-LY 05/10 KTS.
II) WAVE HEIGHT: 1.0-2.5 MTR.
III) WEATHER: 1) E OF 60 DEG E: FAIRLY WIDESPREAD RA/TS.
2) REST AREA: ISOLATED RA/TS.
IV) VISIBILITY: 1) E OF 60 DEG E: POOR.
2) REST AREA: GOOD.
ARB A1-FORECAST VALID FROM 00 UTC OF 21 ST OCT 2026 TO 00 UTC OF 22
ND OCT 2026.
I) WIND DIRECTION AND SPEED: 1) W OF 60 DEG E: CYCLONIC 05/15 KTS
AT 06 DEG N AND 57 DEG E.
2) E OF 60 DEG E TO 70 DEG: SE/S-LY 05/10 KTS.
3) REST AREA: SE-LY 05/10 KTS
TO THE S OF 4 DEG N REST AREA NW/W-LY 05/10 KTS.
II) WAVE HEIGHT: 1.0-2.5 MTR.
III) WEATHER: 1) E OF 65 DEG E: WIDESPREAD RA/TS.
2) REST AREA: ISOLATED RA/TS.
IV) VISIBILITY: 1) E OF 65 DEG E: VERY POOR.
2) REST AREA: GOOD.
ARB A2-ARABIAN SEA: -23 DEG 45 MIN N 68 DEG E TO 00 DEG N 63 DEG E TO
CAPE GARDAFUI
TO N OF 10 DEG N. 55.
ARB A2-FORECAST VALID FROM 09 UTC OF 20 TH OCT 2026 TO 00 UTC OF 21
ST OCT 2026.
I) WIND DIRECTION AND SPEED: 1) N OF 20 DEG N: ANTI-CYCLONIC 05/10
KTS.
2) REST AREA: N/NE-LY 05/15 KTS.
II) WAVE HEIGHT: 0.5-2.0 MTR.
III) WEATHER: 1) S OF 18 DEG N: SCATTERED RA/TS.
2) REST AREA: FAIR.
IV) VISIBILITY: 1) S OF 18 DEG N: MODERATE.
2) REST AREA: GOOD.
ARB A2-FORECAST VALID FROM 00 UTC OF 21 ST OCT 2026 TO 00 UTC OF 22
ND OCT 2026.
I) WIND DIRECTION AND SPEED: 1) N OF 20 DEG N: ANTI-CYCLONIC 05/10
KTS.
2) REST AREA: N/NE-LY 05/15 KTS.
II) WAVE HEIGHT: 0.5-2.0 MTR.
III) WEATHER: 1) S OF 16 DEG N: SCATTERED RA/TS.
2) REST AREA: FAIR.
IV) VISIBILITY: 1) S OF 16 DEG N: MODERATE.
2) REST AREA: GOOD.
BOB A3-BAY OF BENGAL: EQUATOR TO 10 DEG N BETWEEN E OF 80 DEG E WEST
OF 10
DEG N/98 DEG 30 MIN E TO 6 DEG N/95 DEG E THENCE S-WARDS TO EQUATOR.
BOB A3-FORECAST VALID FROM 09 UTC OF 20 TH OCT 2026 TO 00 UTC OF 21
ST OCT 2026.
I) WIND DIRECTION AND SPEED: 1) S OF 05 DEG N: SE/S-LY 10/15 KTS.
2) REST AREA: S/SW-LY 05/10 KTS.
II) WAVE HEIGHT: 0.5-2.5 MTR.
III) WEATHER: WIDESPREAD RA/TS.
IV) VISIBILITY: VERY POOR.
BOB A3-FORECAST VALID FROM 00 UTC OF 21 ST OCT 2026 TO 00 UTC OF 22
ND OCT 2026.
I) WIND DIRECTION AND SPEED1) N OF 05 DEG N: SW/S-LY 05/10 KTS.
2) REST AREA: SE/S-LY 05/10 KTS.
II) WAVE HEIGHT: 0.5-2.5 MTR.
III) WEATHER: WIDESPREAD RA/TS.
IV) VISIBILITY: VERY POOR.
BOB: A4: BAY OF BENGAL N OF 10 DEG N E OF 80 DEG E.
BOB A4-FORECAST VALID FROM 09 UTC OF 20 TH OCT 2026 TO 00 UTC OF 21
ST OCT 2026.
I) WIND DIRECTION AND SPEED: NE/E-LY 05/15 KTS.
II) WAVE HEIGHT: 1.0 -2.0 MTR.
III) WEATHER: 1) S OF 20 DEG N: WIDESPREAD RA/TS.
2) REST AREA: FAIR.
IV) VISIBILITY: 1) S OF 20 DEG N: VERY POOR.
2) REST AREA: GOOD.
BOB A4-FORECAST VALID FROM 00 UTC OF 21 ST OCT 2026 TO 00 UTC OF 22
ND OCT 2026.
I) WIND DIRECTION AND SPEED: N/NE-LY 05/15 KTS BEC CYCLONIC 05/10 KTS
AT 91 DEG E AND 11 DEG N.
II) WAVE HEIGHT: 0.5-2.0 MTR.
III) WEATHER: 1) S OF 19 DEG N: WIDESPREAD RA/TS.
2) REST AREA: FAIR.
IV) VISIBILITY: 1) S OF 19 DEG N: VERY POOR.
2) REST AREA: GOOD.
ADVISORY: PLEASE BE AWARE. WIND WAVE FORECASTS ARE AVERAGES. WIND
GUSTS
CAN BE 40 PER CENT STRONGER THAN THE FORECAST. MAXIMUM WAVE HEIGHT
CAN BE
TWICE THE FORECAST WAVE HEIGHT.
NEXT FORECAST WILL BE ISSUED AT 20/1700 UTC.=