WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
11TH OF MAY 2026 AT 16:30 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 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. TRISTAN: NW 35 in the west towards mid-period, drifting to the central
and southern parts towards the end of the period.
2. CAPE WEST: W to SW 35 to 45 over the south-eastern parts but over the
central parts until mid-period.
3. CAPE EAST: W to NW 40 to 60 over the central parts, but SW 40 to 50 in
the western parts, spreading over the central parts towards
mid-period.
4. MARION FORTIES EAST: NW to N 35 reaching 40 to 60 in the north-west
towards mid-period, drifting to the southern parts
towards the end of the period, while becoming S to
SW 35 to 45 in the south-west.
SYNOPTIC CHART 12:00Z
=====================
High 1024 hPa 26s07w, High 1024 hPa 30s62e
Low 966 hPa 39s23e, Low 961 hPa 51s28e
1. Cold Front: 31s17e 34s20e 35s23e into 39s23e
2. Cold Front: 33s38e 40s43e 45s41e into 51s28e
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 10 to 20, but SW 05 to 15 in the east.
VIS : Good.
SEA STATE: 3.0m in the extreme south, with S to SW swell.
ST HELENA (15S/30S, 00E/20W):
WIND : Anticyclonic 05 to 15 in the south-east, otherwise SE to E 10 to
20 but N to NW 15 to 25 in the south-west.
VIS : Good, becoming moderate in showers and thundershowers in the
south-west towards the end of the period.
SEA STATE: 3.0m in the east until mid-period, with S to SW swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : W to SW 10 to 20 in the south, but NW 15 to 25 in the south-east,
otherwise S to SE 10 to 20, reaching 25 to 30 in the north-east,
but in the south-east towards the end of the period.
VIS : Good.
SEA STATE: 3.0 to 3.5m reaching 4.0 to 4.5m in the south until mid-period,
with S to SW swell.
TRISTAN (30S/40S, 00E/20W):
WIND : W to SW 10 to 20 in the south-east until mid-period, otherwise NW
15 to 25 reaching 30 to 35 in the west towards mid-period,
drifting to the central and southern parts towards the end of the
period.
VIS : Good, but moderate to poor in showers and rain in the southern
and western parts.
SEA STATE: 4.5 to 5.5m, but 3.0 to 4.0m in the north, with SW to W swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : W to SW 20 to 30 reaching 35 to 45 over the south-eastern parts
but over the central parts until mid-period. It will become SW 10
to 20 in the northern and western parts towards the end of the
period.
VIS : Good but moderate to poor in showers and rain in the south and
east.
SEA STATE: 4.0 to 6.0m, reaching 7.0 to 9.0m in the south-east at first,
subsiding to 3.0 to 4.0m in the west towards the end of the
period, with W to SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : W to NW 20 to 30 reaching 40 to 60 over the central parts, but SW
40 to 50 in the western parts, spreading over the central parts
towards mid-period.
VIS : Moderate to poor in rain and thundershowers.
SEA STATE: 3.0 to 4.0m in the east until mid-period, otherwise 5.0 to 7.0m
reaching 8.0 to 10.0m in the west, drifting to the south towards
mid-period, with SW to W swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : N to NE 10 to 20 in the east, otherwise W to NW 15 to 25 reaching
30 in the south-west.
VIS : Good, but moderate in showers and thundershowers in the south-
east.
SEA STATE: 3.5 to 4.5m in the south-west, with S to SW swell.
MOZAMBIQUE CHANNEL:
WIND : NE 05 to 15 in the west, otherwise variable 05 to 10, but N to NW
10 to 20 in the south.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : E to NE 10 to 20 in the south, otherwise SE 10 to 20.
VIS : Moderate in rain and showers in places, but good in the south-
western parts.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : NW to N 25 to 35 reaching 40 to 60 in the north-west towards mid-
period, drifting to the southern parts towards the end of the
period, while becoming S to SW 35 to 45 in the south-west.
VIS : Moderate to poor in rain and showers over the western
half, spreading to the east towards the end of the period, while
becoming with snow-showers over the south-western parts.
SEA STATE: 3.0 to 5.0m, reaching 7.0 to 10.0m in the north-west towards mid-
period, spreading to the south towards the end of the period,
with W to NW swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA
ACK (AMSTERDAM-CROZET-KERGUELEN)
26/05/11 AT 1600UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40%
STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- NIL.
PART 2: GENERAL SYNOPSIS, 26/05/11 AT 1200UTC
- COLD FRONT WITH THUNDERSTORMS CF AXIS 28S/37E, 39S/42E, 51S/34E,
MOVING QUICKLY EASTWARDS, EXPECTED TO REACH WAM AND CRO ON THE 12/05
AROUND 00 UTC.
- UNDULATING FRONT IN FRONTOLYSIS CG AXIS 32/51S, 35S/72E OVER WAM
AND AMS.
- HIGH 1024 OVER WAM AND AMS NEAR 30S/63E SLOW MOVING.
- HIGH 1018 OVER CRO AND KER NEAR 50S/66E SLOW MOVING.
PART 3: FORECAST FOR 24 HOURS FROM 26/05/11 AT 1800UTC TO 26/05/12
AT 1800UTC
WAM (30S/40S, 50E/65E)
FRONTAL RAIN AND SHOWERS AT FIRST DUE TO CG, THEN RAIN AND SQUALLS
WITH THUNDERSTORMS OVER WESTERN AREA DUE TO CF SOON.
WIND: ANTICLOCKWISE 2 TO 4 AT TIMES 5 INCREASING NORTHERLY 5 TO 6
FROM WESTERN AREA WITH THE ARRIVAL OF THE FRONT CF. GUSTS.
SEA : MODERATE , BUT LOCALLY ROUGH OVER SOUTHWESTERN AREA SOON.
VIS : POOR TO VERY POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
SHOWERS AND SQUALLS.
WIND: WESTERLY TO SOUTHWESTERLY 3 TO 4 LOCALLY 5 BACKING SOON
SOUTHERLY 3 TO 4 LOCALLY 5 WITH GUSTS.
SEA : MODERATE TO ROUGH FROM WEST TO EAST. SW SWELL AROUND 3 METERS
OVER EASTERN AREA ABATING.
VIS : POOR TO VERY POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
FRONTAL RAIN AND SHOWERS WITH THUNDERSTORMS OVER WESTERN AREA SOON
DUE TO CF.
WIND: VARIABLE 2 TO 4 INCREASING NORTHERLY 5 TO 6 LOCALLY 7 BY
WESTERN AREA WITH THE ARRIVAL OF THE FRONT CF AT FIRST. GUSTS.
SEA : MODERATE BECOMING ROUGH FROM WESTERN AREA.
VIS : POOR TO VERY POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
WIND: ANTICLOCKWISE 2 TO 4 INCREASING NORTHERLY 4 TO 5 LOCALLY 6 BY
WESTERN AREA LATER.
SEA : MODERATE TO ROUGH FROM WEST TO EAST LOCALLY VERY ROUGH OVER
SOUTHEASTERN AREA AT FIRST BY SW SWELL 2 TO 4 METERS.
VIS : GOOD