WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
29TH OF OCTOBER 2025 AT 13:30 UTC.
FOR SOUTH-EAST SECTOR OF METAREA. VII, PREPARED BY REUNION, SEE AREA 2
BELOW.
NOTE: WX OBSERVATIONS.
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COULD ALL VESSELS EXPERIENCING UNEXPECTED, SEVERE WX/SEA STATE PLEASE
MAKE EVERY EFFORT TO REPORT THIS TO SAWS VIA CAPE TOWN RADIO.
AREA 1:
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FORECAST VALID FROM 292200 TO 302200 UTC:
WIND IN KNOTS, WAVE HEIGHTS IN METERS. NO SEA STATE GIVEN IF WAVES LESS THAN 3M.
NOTE THE WIND SPEEDS QUOTED HERE ARE THE EXPECTED AVERAGE SPEEDS.
INDIVIDUAL GUSTS MAY EXCEED THESE VALUES BY A FACTOR OF UP TO 1.5.
WAVE HEIGHTS ARE SIGNIFICANT WAVE HEIGHTS, WHICH MAY BE ACCOMPANIED BY INDIVIDUAL WAVES 1.5 TO 2.0 TIMES HIGHER.
GALE FORCE WARNINGS:
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1. MARION FORTIES EAST: W to SW 35 to 40 in the south.
SYNOPTIC CHART 12:00Z
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High 1030 hPa 33s03w High 1020 hPa 34s58e.
Low 950 hPa 56s42e.
AREA FORECAST:
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ASCENSION (06S/15S, 00E/20W):
WIND : SE 10 to 20.
VIS : Good.
SEA STATE: 3.0m for the first half of the period, with SE swell.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 10 to 15 but SW 05 to 10 in the east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : Variable 05 in the south, otherwise E to SE 10 to 20.
VIS : Good.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 10 to 20 reaching 25 in the south-east.
VIS : Good.
SEA STATE: 3.0m, except in the north, reaching 3.5 to 4.0m in the south-
east, with S to SE swell.
TRISTAN (30S/40S, 00E/20W):
WIND : NW 15 to 25 reaching 30 in the south-east but W to SW 15 to 25
in the south-west spreading to the south-east by mid-period.
VIS : Good in the north-east, otherwise moderate in showers and
rain.
SEA STATE: 3.0 to 4.0m over the central and southern parts, reaching 4.5
to 5.0m in the south, with W to NW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : Anticyclonic 05 to 10 over the central and north-western
parts for the first half of the period, otherwise S to SE 15
to 25 but NW 15 to 25 in the south-west reaching 30.
VIS : Good.
SEA STATE: 3.5 to 4.5m in the east and south-west, with S to SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : SW 15 to 25 but E to NE 15 to 25 in the north-west reaching 30
from mid-period.
VIS : Moderate in showers and rain in the east and north, otherwise
good.
SEA STATE: 3.5 to 4.5m reaching 5.5 to 6.5m in the south, with SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : S to SE 10 to 20 but NE 15 to 25 in the south-west.
VIS : Good but moderate in showers in the extreme west.
SEA STATE: 3.0m in places, with S to SW swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 10 to 15 reaching 20 to 25 in the south-east.
VIS : Good.
SEA STATE: 3.0m in the south-east, with S swell.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : SE 10 to 20 but NE 10 to 20 in the south.
VIS : Good.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to SW 20 to 30 reaching 35 to 40 in the south.
VIS : Moderate in showers and rain but moderate to poor in snow-
showers in the south.
SEA STATE: 6.0 to 8.0m reaching 9.0 to 10.0m in the south, with SW to W
swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
25/10/29 AT 0500UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALE FORCE 8 EXPECTED OVER CRO.
- STORM FORCE 10 RUNNING OVER KER.
PART 2: GENERAL SYNOPSIS, 25/10/29 AT 0000UTC
- DEEPENING LOW 987 HPA NEAR 46S/70E WITH COLD FRONT CF ASSOCIATED AND AXIS 1S/53E, 35S/65E, 40S/74E, 46S/70E MOVING EASTNORTHEASTWARD.
- ARRIVAL OF A NEW COLD FRONT OVER CRO AND AMS AT THE END OF THE FORECAST PERIOD.
PART 3: FORECAST FOR 24 HOURS FROM 25/10/29 AT 0600UTC TO 25/10/30 AT 0600UTC
WAM (30S/40S, 50E/65E)
RAIN AND FRONTAL SHOWERS, SQUALLS WITH CF IN THE NORTH THEN OVER THE SOUTHERN WITH A NEW FRONT AT THE END OF THE PERIOD.
WIND: NORTHWEST 3 TO 5 AHEAD OF CF, BACKING SOUTHWEST 3/4 BEHIND, THEN LATER BECOMING ANTICLOCKWISE 3 TO 5 OVER SOUTHERN OF CF.
NORTHWEST 4/5 INCREASING 5/6 IN THE DAYTIME AHEAD OF A NEW FRONT.
SEA: ROUGH TO VERY ROUGH FROM NORTH TO SOUTH. SOUTHWEST SWELL 3 M OVER SOUTHERN AND WESTERN AREAS, STRENGTHENING TO 3 TO 4 M.
VISIBILITY: POOR TO VERY POOR UNDER PRECIPITATION.
AMS (30S/40S, 65E/80E)
RAIN AND FRONTAL SHOWERS WITH CF AT THE START OF THE PERIOD.
WIND: NORTHWEST 4 TO 6 AHEAD OF CF, BACKING SOUTH 4/5 BEHIND.
BECOMING ANTICLOCKWISE 3 TO 5 OVER WESTERN AREAS OVERNIGHT.
SEA: ROUGH TO VERY ROUGH FROM NORTH TO SOUTH. SOUTHWEST SWELL 3 M OVER SOUTHERN AREAS.
VISIBILITY: POOR UNDER PRECIPITATION.
CRO (40S/50S, 50E/65E)
SHOWERS FOLLOWED BY RAIN AND FRONTAL SHOWERS AS A NEW COLD FRONT PASSES THROUGH OVERNIGHT.
WIND: NORTHWEST 6/7 LOCALLY 8, VEERING WEST 6/7 AT THE END OF THE FORECAST PERIOD.
SEA: ROUGH TO VERY ROUGH. WEST SWELL 3 TO 5 M.
VISIBILITY: VERY POOR DURING PRECIPITATION.
KER (40S/50S, 65E/80E)
RAIN AND FRONTAL SHOWERS, SQUALLS WITH CF.
WIND: LOW PRESSURE 6 TO 8, SOMETIMES 9/10 NORTH OF THE LOW-PRESSURE SYSTEM, SETTLING IN THE WEST AT 4 TO 6 DURING THE NIGHT. STRONG GUSTS.
SEA: ROUGH TO VERY ROUGH LOCALLY, BECOMING ROUGH TO VERY ROUGH. WEST SWELL 3 TO 4 M.
VISIBILITY: VERY POOR IN PRECIPITATION