WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
10th OF SEPTEMBER 2026 AT 17:00 UTC.
FOR SOUTH-EAST SECTOR OF METAREA. VII, PREPARED BY REUNION, SEE AREA 2
BELOW.
NOTE: WX OBSERVATIONS.
======================
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 102200 TO 112200 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:
====================
1. ST HELENA: Cyclonic 35 in the south-east from mid-period.
2. CAPE EAST: Cyclonic 35 in the south-east.
3. MARION FORTIES EAST : NW 35 in places in the south but cyclonic 35 in
the north-east by the end of the period.
SYNOPTIC CHART 12:00Z
=====================
High 1024 hPa 32s20w, High 1028 hPa 29s51e,
Low 968 hPa 60s05e,
1. Cold Front: 43s14e 53s23e 60s23e 66s11e into 60s05e.
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : SE to E 10 to 20.
VIS : Good.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 05 to 15, but SW 05 to 10 in the east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : Variable 05 to 10 in the north-east, otherwise SE to
E 15 to 25 but cyclonic 20 to 30 in the south-east reaching 35
from mid-period.
VIS : Good but moderate to poor in showers and thundershowers in
the south-east.
SEA STATE: 3.0 to 4.0m, except in the north, reaching 4.5 to 5.0m in the
south-east, with SE swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 15 to 25 reaching 30, but variable 05 to 10 in the
north-west.
VIS : Good but moderate in showers and thundershowers in the south
towards the end of the period.
SEA STATE: 3.0 to 3.5m in the south, with SE to S swell.
TRISTAN (30S/40S, 00E/20W):
WIND : Anticyclonic 05 to 15, but S to SE 20 to 30 in the north-east.
VIS : Good but moderate in showers and thundershowers in the north-
west.
SEA STATE: 3.0 to 4.0m in the east reaching 4.5 to 5.0m in the north-
east, with S to SW swell but SE swell in the north-east.
CAPE WEST (30S/40S, 00E/20E):
WIND : Anticyclonic 05 to 15 in the south, otherwise S to SE 10 to 20
reaching 25 to 30 in the north.
VIS : Good but moderate in showers and thundershowers in the north
by the end of the period.
SEA STATE: 3.0 to 4.0m, with SW swell but SE swell in the north.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : Cyclonic 15 to 25 reaching 30 to 35 in the south-east but SE
10 to 20 in the west, becoming Anticyclonic 05 to 10 in the
south-west from mid-period.
VIS : Moderate to poor in showers and thundershowers in the south-
east but in rain in places in the west, otherwise good.
SEA STATE: 3.0 to 4.0m, except in the north-east at first, reaching 4.5
to 5.0m in the south-east, with SW to W swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : SW 10 to 20 in the extreme west at first, otherwise
Anticyclonic 05 to 15 but NE 15 to 25 in the north-east.
VIS : Good but moderate in rain and showers in the north-east until
mid-period.
MOZAMBIQUE CHANNEL:
WIND : S to SE 05 to 15.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : E to SE 15 to 25 in the north reaching 30 in the extreme
north-west but NE 10 to 20 in the south.
VIS : Moderate in showers and rain in places.
SEA STATE: 3.0 to 4.0m in the north, with E to SE swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to SW 20 to 30 in the south-east at first, otherwise NW 15
to 25 reaching 30 to 35 in places in the south but cyclonic 20
to 30 in the north reaching 35 in the north-east by the end of
the period.
VIS : Moderate in showers and thundershowers in the north and south-
west spreading to the south-east from mid-period.
SEA STATE: 3.0 to 4.0m in the extreme north otherwise 4.5 to 5.5m,
reaching 6.5 to 7.5m in places but 8.0 to 8.5m in the south-
east at first, with W to SW swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA
ACK (AMSTERDAM-CROZET-KERGUELEN)
26/09/10 AT 1700UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40%
STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALE FORCE 8 OVER CRO AND KER.
PART 2: GENERAL SYNOPSIS, 26/09/10 AT 1200UTC
- WAVING COLD FRONT CF OVER CRO AND KER AREA, AXIS42S/50E, 43S/55E,
44S/60E, 45S/65E, 46S/70E, 50S/75E AND MOVING EASTWARD 20/25KT.- HIGH
1032 HPA NEAR 32S/54E.
PART 3: FORECAST FOR 24 HOURS FROM 26/09/10 AT 1800UTC TO 26/09/11
AT 1800UTC
WAM (30S/40S, 50E/65E)
SCATTERED SHOWERS, FOLLOWED BY RAIN AND FRONTAL SHOWERS AS A NEW WARM
FRONT MOVES OVER FAR SOUTHERN OF THE REGION DURING THE DAY.
WIND: ANTICLOCKWISE, FORCE 3 TO 4, OCCASIONALLY 5 OVER NORTHERN,
BUT WESTERLY, FORCE 5 TO 6 WITH GUSTSOVER SOUTHERN; TEMPORARILY
SOUTHERLY, FORCE 3/4, AHEAD OF THE WARM FRONT TOWARDS THE END
OF THE FORECAST PERIOD.
SEA : MODERATE TO ROUGH, VERY ROUGHOVER FAR SOUTHERN AT THE END
OF THE FORECAST PERIOD. LONG SWELLS FROM THE SOUTH-WEST, 3 TO
4 M OVER FAR SOUTHERN.
VIS : GENERALLY GOOD, BECOMING POOR OVER FAR SOUTHERN.
AMS (30S/40S, 65E/80E)
SCATTERED SHOWERS, FOLLOWED BY RAIN AND FRONTAL SHOWERS OVER THE
SOUTHERN PART OF THE REGION DURING THE DAY.
WIND: WEST TO SOUTH-WESTERLY, FORCE 5 TO 6, FRESHENING LOCALLY
FORCE 7 OVER SOUTHERN AREAS AHEAD OF THE COLD FRONT, VEERING
SOUTH-WESTERLY, FORCE 4 TO 6, BEHIND THE FRONT AT THE END OF
THE FORECAST PERIOD.
SEA : ROUGH TO VERY ROUGH DUE TO A LONG SOUTH-WESTERLY SWELL OF 4 TO 5
METRES.
VIS : GOOD, BECOMING POOR UNDER THE COLD FRONT.
CRO (40S/50S, 50E/65E)
RAIN, SHOWERS AND FRONTAL SQUALLS ASSOCIATED WITH THE COLD FRONT,
FOLLOWED BY A NEW WEATHER SYSTEM AFFECTING THE NORTHERN PART OF THE
REGION TOWARDS THE END OF THE FORECAST PERIOD.
WIND: WESTERLY, FORCE 6 TO 7, LOCALLY 8. STRONG GUSTS. SHIFTING
TO SOUTH-WESTERLY, FORCE 6 TO 8, DURING THE NIGHT, THEN
BECOMING CLOCKWISE, FORCE 6 TO 8, OVER THE NORTH-WESTERN
PART OF THE REGION TOWARDS THE END OF THE FORECAST PERIOD.
SEA : ROUGH TO VERY ROUGH, BECOMING VERY ROUGH TO HIGH. LONG
SOUTH-WESTERLY SWELL OF 4 TO 6 METRES.
VIS : VERY POOR DURING RAINFALL.
KER (40S/50S, 65E/80E)
RAIN, SHOWERS AND FRONTAL SQUALLS UNDER A COLD FRONT.
WIND: WEST TO SOUTH-WESTERLY, FORCE 6 TO 8. STRONG GUSTS.
SEA : ROUGH TO VERY ROUGH, LOCALLY HIGH. LONG SWELL FROM THE
WEST TO SOUTH-WEST, 2 TO 4 METRES, CROSSING WITH VERY ROUGH
WIND SEAS.
VIS : POOR TO VERY POOR DURING PRECIPITATION.