WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
20TH OF JULY 2026 AT 08:30 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 201000 TO 211000 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 NW 35 in the south.
SYNOPTIC CHART 06:00Z
=====================
High 1028 hPa 30s24w, High 1022 hPa 41s44e, High 1016 hPa 48s05w
Low 1001 hPa 41s15w, Low 963 hPa 56s35e
1. Cold Front: 36s19w 38s15w 43s15w into 41s15w
2. Cold Front: 40s02e 44s13e 50s24e 55s38e into 56s35e
AREA FORECAST:
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ASCENSION (06S/15S, 00E/20W):
WIND : SE 10 to 20, but 25 in the south-west.
VIS : Good.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 05 to 15 in the west, otherwise variable 05.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : Variable 05 to 10 in the south-east, otherwise E to SE 10 to
20 in the north-west by the end of the period.
VIS : Good but moderate in showers and rain in places in the west.
SEA STATE: 3.0m in the central and north-western parts at first, with S
to SE swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : Variable 05 to 10 in the south-west, otherwise S to SE 05 to
15.
VIS : Good.
TRISTAN (30S/40S, 00E/20W):
WIND : Variable 05 to 10 in the north-east at first, otherwise W to
NW 15 to 25, but SW 20 to 30 in the south-west after mid-
period.
VIS : Good but moderate in showers and rain over the southern half. SEA STATE: 3.0 to 4.0m, reaching 4.5 in the south, with W to SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : Anticyclonic 05 to 10 in the north-west, otherwise NW to W 15
to 25, reaching 30 in the south-west.
VIS : Good but moderate in showers and rain in the south.
SEA STATE: 3.0 to 4.0m in the south, reaching 4.5m in the south-east,
with W to SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : Anticyclonic 05 to 10 in the east, otherwise W to SW 05 to 15,
but E to NE 15 to 25 in the north-east.
VIS : Good but moderate in showers in the west and in places over
the central parts.
SEA STATE: 3.5 to 4.5m, with S to SW swell over the eastern half
otherwise SE to E.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : Variable 05 to 10 in the west but SE to E 05 to 15 in the
east.
VIS : Good but moderate in showers and thundershowers over the
central parts and the north-east.
SEA STATE: 3.0 to 4.0m in the south-east, with S to SW swell.
MOZAMBIQUE CHANNEL:
WIND : Variable 05 to 10, but E to SE 05 to 10 in the south-east.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : Variable 05 to 10 but S to SE 05 to 15 in the north.
VIS : Good, but moderate in showers and rain the south.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : Anticyclonic 05 to 10 in the north-east, otherwise W to NW 15
to 25, reaching 30 to 35 in the south.
VIS : Good in the north-east, but moderate in showers and rain.
SEA STATE: 3.0 to 4.0m with NW swell, reaching 4.5 to 5.0m in the south,
with S to SE swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
26/07/20 AT 0600UTC
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 WAM, AMS, CRO AND KER.
PART 2: GENERAL SYNOPSIS, 26/07/20 AT 0000UTC
- LOW 982 HPA NEAR 41S/62E, MOVING EASTWARD, EXPECTED 993 HPA NEAR
43S/70E BY THE END.
- HIGH 1020 HPA NEAR 41S/41E, EXPECTED 1024 HPA NEAR 36S/49E AT END
END.
PART 3: FORECAST FOR 24 HOURS FROM 26/07/20 AT 0600UTC TO 26/07/21 AT
0600UTC
WAM (30S/40S, 50E/65E)
SHOWERS, LOC SQUALLS OVER EASTERN.
WIND: WEST TO SOUTHWEST 4/5 IN THE NORTH AND 6/7 IN THE SOUTH, LOCALLY 8
IN THE FAR SOUTH-EAST AT START, DECREASING SOUTHERLY 3/4 IN THE
WEST LATER. BUT NORTHWEST 6/7 IN THE NORTH-EAST AT START.
SEA : ROUGH TO VERY ROUGH, BUT HIGH IN THE SOUTH-EAST AT START. SOUTH
TO SOUTH-WESTERLY SWELL, 3 TO 5 METERS.
VIS : POOR TO VERY POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
RAIN AND FRONTAL SHOWERS, LOC SQUALLS.
WIND: NORTH-WEST 5/6, REACHING 7 NEAR THE FRONT, BACKING BEHIND WESTERLY
4/5 IN THE NORTH AND 6/7 IN THE SOUTH, LOCALLY 8 OVER FAR SOUTHWEST
AT FIRST.
SEA : ROUGH TO VERY ROUGH, BUT HIGH IN FAR SOUTH-WEST. WESTERLY SWELL
3/4 M BEHIND THE FRONT.
VIS : POOR TO VERY POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
SHOWERS AND SQUALLS.
WIND: WESTERN HALF: SOUTHERLY 5/6 IN THE NORTH AND 4/5 IN THE SOUTH,
INCREASING BY SOUTH-WEST SOON NORTH-WESTERLY 5/6 THEN AT END 6/7
WITH STRONG GUSTS OVER FAR SOUTH-WEST.
EASTERN HALF: CLOCKWISE 7/8 WITH GUSTS, SETTLING LATER SOUTHERLY
6/7 WITH SOUTH-EASTERLY 4/5 IN THE FAR SOUTH.
SEA : VERY ROUGH TO HIGH, BECOMING ROUGH TO VERY ROUGH LATER.
EASTERLY TO SOUTH-EASTERLY SWELL 3/4 M, BUT NORTH-WESTERLY SWELL
3/5 M IN THE NORTH-EAST.
VIS : POOR TO VERY POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
SHOWERS AND SQUALLS.
WIND: NORTHERN HALF: CLOCKWISE 7/8 THEN 6/7 BUT NORTHERLY 5/6 IN EAST.
SOUTHERN HALF: EASTERLY 6/7, VERY LOCALLY 8 AT FIRST, DECREASING
LATER NORTHERLY 3/4 THEN VARIABLE IN THE EAST, SETTLING SOUTHERLY
5/6 OVER WEST AT END.
SEA : ROUGH TO VERY ROUGH, BUT HIGH IN THE NORTH-WEST. WESTERLY TO NORTH-
WESTERLY SWELL 3/5 METERS, BUT SOUTH-WEST SWELL 3/4 OVERS
SOUTH-EAST AT FIRST.
VIS : VERY POOR IN PRECIPITATION.=