WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
11th 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 112200 TO 122200 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 at first.
2. TRADES (15S/30S, 00E/WEST COAST): S to SE 35 in the extreme
south-west at first.
SYNOPTIC CHART 12:00Z
=====================
High 1034 hPa 34s14w, High 1025 hPa 29s58e,
Low 1007 hPa 40s47e, Low 963 hPa 64s33e
1. Cold Front: 39s16e 50s43e 60s45e 64s39e into 64s33e.
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : S to SE 10 to 20.
VIS : Good.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SW 05 to 15.
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 in places at first.
VIS : Good but moderate to poor in showers and thundershowers in
the south-east.
SEA STATE: 3.0 to 3.5m, except in the north, reaching 4.0 to 5.0m in the
south-east, with SE swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 20 to 30 in the south reaching 35 over the extreme
south-west at first, becoming variable 05 to 10 in the south-
west during the second half of the period, otherwise variable
05 to 10.
VIS : Good but moderate in showers and thundershowers in the south.
SEA STATE: 3.5 to 4.0m 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
and NW 15 to 25 in the south-west.
VIS : Good but moderate in showers and thundershowers in the north-
east at first but moderate in showers in the south-west
from the second half of the period.
SEA STATE: 3.0 to 4.0m in the north-east reaching 4.5m at first
becoming 3.5 in the south-west towards the end of the period,
with S to SW swell but SE swell in the north-east.
CAPE WEST (30S/40S, 00E/20E):
WIND : Anticyclonic 10 to 15 in the south-west, 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.
SEA STATE: 3.0 but 3.5 to 4.5m in the north-east from second half of the
period, with SW swell but SE swell in the north.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : Cyclonic 15 to 25 in the east otherwise anticyclonic 10 to 15
reaching 15 to 25 in the north-west towards the second
half of the period.
VIS : Moderate to poor in showers and thundershowers in the south-
east during the first half of the period, becoming moderate
in showers in the north-west in the second half of the period,
otherwise good.
SEA STATE: 3.0 to 3.5 reaching 4.0 to 5.0m in the south-east in the first
half of the period, becoming 3.0 to 4.0 in the west towards
the end of the period with SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : S 05 to 15 but N to NE 10 to 20 in the east becoming SW 15 to
25 in the east and NE 10 to 15 in the north-west in the second
half of the period.
VIS : Good but moderate in rain and showers in the south-east.
MOZAMBIQUE CHANNEL:
WIND : S to SE 10 to 20.
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 otherwise NE 10 to 20.
VIS : Good but moderate in showers and rain in the north.
SEA STATE: 3.0 in the north in the first with SE swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to SW 20 to 30 reaching 35 in the south but S to SE 20 to 25
in the extreme north-east at first.
VIS : Moderate in showers and thundershowers in the south.
SEA STATE: 3.5 to 4.5m reaching 5.0 to 6.5m in the south-west 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)
26/09/11 AT 1700UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40%
STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALE CONTINUING OVER WAM AND CRO AND EXPECTED OVER KER.- SEVERE
GALE EXPECTED OVER CRO
PART 2: GENERAL SYNOPSIS, 26/09/11 AT 1200UTC
- HIGH AT 1025 HPA NEAR 29S/58E, WEAKENING.- LOW AT 1005 HPA NEAR
40S/47E, MOVING EASTWARD AND DEEPENING, FORECAST TO REACH 990 HPA
NEAR 41S/63E ON THE 12TH AT 12 UTC, WITH AN ASSOCIATED DISTURBANCE.-
A WEAK COLD FRONT IS FORECAST FOR SOUTHERN CRO.
PART 3: FORECAST FOR 24 HOURS FROM 26/09/11 AT 1800UTC TO 26/09/12
AT 1800UTC
WAM (30S/40S, 50E/65E)
RAIN OR FRONTAL SHOWERS WITH THUNDERSTORMS IN THE SOUTHWEST MOVING
NORTHWARD TOWARD THE NORTHEAST.WIND: NORTHWEST 5 TO 7 IN THE
SOUTHWEST AHEAD OF THE FRONT MOVING NORTHWARD OVER THE AREA, SHIFTING
TO SOUTHWEST 5 TO 7 BEHIND THE FRONT, LOCALLY 8 IN THE SOUTH.
GUSTS.SEA: MODERATE TO VERY ROUGH FROM NORTH TO SOUTH,, LOCALLY HIGH
IN THE SOUTHWEST AT END. SOUTHWEST SWELL 2 TO 5 M FROM NORTH TO
SOUTH.VISIBILITY: POOR DURING PRECIPITATION.
AMS (30S/40S, 65E/80E)
SCATTERED SHOWERS BECOMING MORE FREQUENT WITH FRONTAL RAIN IN THE
SOUTHWEST LATER.WIND: SOUTHWEST 5 TO 6 OCCASIONALLY 7,DECRASING TO 3
TO 4 FROM THE WEST, THEN VEERING TO NORTHWEST 5 TO 7 WITH GUSTS
LATER.SEA: ROUGH TO VERY ROUGH. SOUTHWEST SWELL 3 TO 5 M FROM NORTH
TO SOUTH.VISIBILITY: POOR DURING FRONTAL PRECIPITATION.
CRO (40S/50S, 50E/65E)
HEAVY RAIN OR FRONTAL SHOWERS OVER THE NORTHERN HALF.WIND:NORTHERN
HALF: CYCLONIC 6 TO 8 TEMPORARILY 9 LATER, STRONG GUSTS, SHIFTING TO
SOUTHWEST 4 TO 5 IN THE WEST AT END.SOUTHERN HALF: WEST TO SOUTHWEST
4 TO 6, VEERING TO NORTHWEST 6 TO 7 IN THE SOUTHWEST LATER.SEA: ROUGH
TO VERY ROUGH. SOUTHWEST SWELL 4 TO 5 M, SUBSIDING.VISIBILITY: VERY
POOR DURING PRECIPITATION.
KER (40S/50S, 65E/80E)
SCATTERED SHOWERS BECOMING MORE FREQUENT, WITH FRONTAL RAIN IN THE
NORTH LATER ON.WIND: SOUTHWEST TO WEST, WEAKENING TO 3 TO 6 FROM THE
WEST, THEN CYCLONIC 6 TO 8 WITH SEVERE GUSTS IN THE NORTHERN AREA
LATER ON.SEA: VERY ROUGH OR HIGH. SW SWELL 5 TO 6 M COMING FROM THE
WEST.VISIBILITY: VERY POOR DURING PRECIPITATION.=