WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
21ST OF SEPTEMBER 2026 AT 13:30 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 212200 TO 222200 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. CAPE EAST: CYCLONIC 35 IN THE CENTRAL PARTS, WHILE MOVING
EASTWARDS,
IT WILL REACH 40 BY MID-PERIOD.
2. MARION FORTIES EAST: NW 35 IN THE EXTREME SOUTH-WEST FROM
MID-PERIOD.
SYNOPTIC CHART 12:00Z
=====================
HIGH 1030 HPA 32S22E, HIGH 1029 HPA 44S32E
LOW 1008 HPA 45S04E, LOW 1017 37S37E
1. COLD FRONT: 29S08W 35S03W 39S01W INTO 45S04E.
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : E TO SE 10 TO 20.
VIS : GOOD.
ANGOLA (06S/15S, 00E/00N):
WIND : S TO SE 05 TO 15.
VIS : GOOD.
ST HELENA (15S/30S, 00E/20W):
WIND : E TO SE 10 TO 20.
VIS : GOOD.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S TO SE 10 TO 20, BUT SW TO W 05 TO 15 IN THE EXTREME
EAST.
VIS : GOOD.
TRISTAN (30S/40S, 00E/20W):
WIND : W TO SW 15 TO 25, AND ANTICYCLONIC 05 TO 15 IN THE WEST,
WHILE
SPREADING EASTWARDS IT WILL BECOME ANTICYCLONIC 05 TO 15
IN
THE CENTRAL PARTS AND SE 15 IN THE NORTH-EAST AND NW 15 TO
25
IN THE SOUTH-WEST.
VIS : GOOD.
SEA STATE: 3.0 M IN THE EXTREME SOUTH-WEST, WITH W TO SW SWELL.
CAPE WEST (30S/40S, 00E/20E):
WIND : E TO SE 15 TO 25 BUT W TO NW 05 TO 15 IN THE SOUTH-WEST,
BUT
SW 05 TO 15 IN THE SOUTH-WEST.
VIS : GOOD, BUT MODERATE IN SHOWERS AND THUNDERSHOWERS IN THE
EXTREME SOUTH-EAST FROM MID-PERIOD.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : SE 05 TO 10, BUT CYCLONIC 20 TO 30 IN THE CENTRAL PARTS,
WHILE
MOVING EASTWARDS, IT WILL REACH 35 TO 40 BY MID-PERIOD BUT
NE
15 TO 25 IN THE WEST.
VIS : GOOD BECOMING MODERATE TO POOR IN PLACES IN THE EAST,
SPREADING TO THE NORTH-EAST BY END OF PERIOD.
SEA STATE: 3.0 TO 4.0M IN THE CENTRAL AND SOUTHERN PARTS, REACHING
5.0M
IN THE EAST, WITH SW SWELL.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : E TO NE 15 TO 25, BUT SE 05 TO 15 IN THE CENTRAL-NORTH
AND SW 05 TO 15 IN THE SOUTH-WEST WHERE IT WILL BECOME SE
TO E
15 TO 25 BY MID-PERIOD.
VIS : GOOD BUT MODERATE TO POOR IN SHOWERS AND THUNDERSHOWERS
IN
THE EAST.
SEA STATE: 3.0 TO 4.0M IN THE CENTRAL AND SOUTHERN PARTS, WITH S TO
SE
SWELL.
MOZAMBIQUE CHANNEL:
WIND : S TO SE 05 TO 15 BUT W TO SW 05 TO 15 IN THE EAST.
VIS : GOOD.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : N TO NE 05 TO 15 IN THE SOUTH, OTHERWISE E TO SE 15 TO 25.
VIS : GOOD.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : SE 10 TO 20 IN THE NORTH, OTHERWISE NW TO N 15 TO 25,
REACHING
30 IN THE EXTREME SOUTH-WEST BUT 35 FROM MID-PERIOD.
VIS : GOOD BUT MODERATE IN SHOWERS AND RAIN IN THE NORTH AT
FIRST,
BUT IN SNOW-SHOWERS OVER THE SOUTH.
SEA STATE: 7.08 TO 8.0M IN THE EAST AT FIRST, OTHERWISE 3.0 TO 4.0M
REACHING 5.0M IN THE IN THE SOUTHERN PARTS, WITH W TO SW SWELL.
AREA 2:
======
MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA
ACK (AMSTERDAM-CROZET-KERGUELEN)
26/09/21 AT 0500UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40%
STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALE OR STRONG GALE CONTINUING OVER CRO.
- GALE EXPECTED SOON OVER KER.
PART 2: GENERAL SYNOPSIS, 26/09/21 AT 0000UTC
- DISTURBED FRESH OR STRONG WESTERLY FLOW OVER SOUTHERN PART OF
BASIN.
- COLD FRONT AXIS 40S/61S 40S/55E, MOVING EASTWARD.
- HIGH 1029 OVER NORTHERN WAM AND AMS.
- HIGH EXPECTED 1032 OVER WESTERN CRO AT END.
PART 3: FORECAST FOR 24 HOURS FROM 26/09/21 AT 0600UTC TO 26/09/22 AT
0600UTC
WAM (30S/40S, 50E/65E)
RAIN OVER FAR SOUTHERN SOON.
WIND : ANTICLOCKWISE 3 TO 5, BUT W 5 OR 6 OVER FAR SOUTHERN AT FIRST.
SEA : MODERATE TO VERY ROUGH FROM NORTH TO SOUTH. SW SWELL OVER
SOUTHERN, 2 OR 3 METERS, INCREASING 4 OR 5 METERS AT END.
VISI : POOR WITH PRECIPITATION OVER FAR SOUTHERN.
AMS (30S/40S, 65E/80E)
FEW SHOWERS, THEN FRONTAL SHOWERS AND RAIN OVER SOUTHERN AT END.
WIND : ANTICLOCKWISE 3 TO 5 BUT W 5 OR 6 OVER FAR SOUTHERN.
SEA : MODERATE TO VERY ROUGH FROM NORTH TO SOUTH. SW SWELL 2 TO 4
METERS
OVER SOUTHERN.
VISI : GOOD, THEN POOR WITH PRECIPITATION OVER FAR SOUTHERN.
CRO (40S/50S, 50E/65E)
FRONTAL RAIN AND SHOWERS OVER FAR NORTHERN AT FIRST, ELSEWHERE
SCATTERED SHOWERS, LOCALLY SNOWY OVER FAR SOUTHERN.
WIND : W OR SW 6 OR 7 OVER NORTHERN, 8 OR 9 OVER SOUTHERN, DECREASING
5
OR 6 FROM WEST LATER, THEN BECOMING ANTICLOCKWISE 3 TO 5 OVER
NORTHERN AT END. SEVERE GUSTS.
SEA : VERY ROUGH TO VERY HIGH FROM NORTH TO SOUTH. SW SWELL 2 TO 4
METERS SOON INCREASING 7 TO 9 METERS.
VISI : POOR TO VERY POOR WITH PRECIPITATION.
KER (40S/50S, 65E/80E)
RAIN OVER NORTHERN. SNOW SHOWERS OVER SOUTHERN.
WIND : W 6 OR 7, SOON INCREASING 7 OR 8, DECREASING SW 5 OR 6 OVER
NORTHWESTERN AT END. SEVERE GUSTS.
SEA : VERY ROUGH SOON BECOMING HIGH TO VERY HIGH FROM SOUTHWEST. W
TO SW
SWELL 3 TO 5 METERS, INCREASING 7 OR 8 METERS AT END.
VISI : POOR TO VERY POOR WITH PRECIPITATION.
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