WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
28TH OF APRIL 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 282200 TO 292200 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: W to SW reaching 35 to 40 in places over the central,
and east drifting to the extreme east by the end of the
period.
2. MARION FORTIES EAST: Cyclonic 35 to 45 in the north, drifting
to the extreme north-east towards the end of the period. It
will become NW 35 in the extreme south-west during the second
half of the period.
SYNOPTIC CHART 12:00Z
=====================
High 1035 hPa 35s00e
Low 979 hPa 53s00e, Low 981 45s37e.
1. Cold front: 39s09w 46s00e 53s02e into 53s00e.
2. Cold Front: 26s40e 35s47e 46s49e 52s41e 47s34e into 45s37e.
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : E to SE 15 to 25.
VIS : Good, but moderate in showers and thundershowers in the extreme
northern parts.
SEA STATE: 3.0m in the south spreading to the north towards mid-period, with
S to SE swell
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 10 to 20, but SW 05 to 10 in the east.
VIS : Good, but moderate in showers and thundershowers in the extreme
north.
SEA STATE: 3.0m in the south spreading to the north by the end of the
period, with S to SW swell.
ST HELENA (15S/30S, 00E/20W):
WIND : E to SE 15 to 25 becoming variable 05 to 10 in the south during
the second half of the period.
VIS : Good.
SEA STATE: 3.0 to 3.5m over the northern parts, with SE swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 15 to 25.
VIS : Good.
SEA STATE: 3.0 to 3.5m, with S to SE swell.
TRISTAN (30S/40S, 00E/20W):
WIND : Anticyclonic 05 to 15 in the east, otherwise N to NW 15 to 25
reaching 30 in the south-west at times drifting eastwards during
the first half of the period.
VIS : Good, but moderate to poor in showers and thundershowers in
the south-west spreading north-westwards to the west
in the first half of the period.
SEA STATE: 3.0 to 3.5m in the south, with NW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : Anticyclonic 05 to 15 in the west, but SE 15 to 25 in the
north-east, otherwise S 15 to 20. It will become W to NW 10
to 20 in the south and south-west towards the mid-period.
VIS : Good.
SEA STATE: 3.0m in the east, becoming 3.5m in the extreme south towards end
of the period, with S to SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : W to SW 15 to 25, reaching 30 to 40 in places over the central,
and east drifting to the extreme east by the end of the period,
while moderating to 10 to 15 in the west.
VIS : Moderate to poor in showers and thundershowers in the east
starting to clear in the west towards the end of the period.
SEA STATE: 5.0 to 6.0 in the west, reaching 7.0 to 9.0 over the east,
while subside to 3.0 to 3.5 in the extreme south-west towards the
end of the period with W to SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : W to SW 15 to 25, reaching 30 in the south becoming variable 05
to 10kt in the west towards the end of the period.
VIS : Moderate in showers and rain in places clearing from the west
during the second half of the period.
SEA STATE: 3.0 to 4.0m in the west, drifting eastwards to the south reaching
5.0 to 6.0m with SW swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 05 to 15 in the north, otherwise 20 to 25.
VIS : Good, but moderate in showers and thundershowers in places in the
north and south.
SEA STATE: 3.0m in the south with SW swell.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : Variable 05 becoming S to SE 10 to 15 towards the end of the
period.
VIS : Good but moderate in showers and thundershowers in places.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : Cyclonic 15 to 25, reaching 35 to 45 in the north, drifting
to the extreme north-east towards the end of the period. It will
become W to NW 20 to 30 from the west reaching 35 in the extreme
south-west during the second half of the period.
VIS : Moderate to poor in showers and rain in the east during the first
half of the period, while becoming moderate to poor in the south-
west toward the end of the period.
SEA STATE: 3.5m, becoming 5.0 to 6.0m in the north and west,
reaching 7.0 to 8.0m at times, with NW swell, but SW in the
south-west during the second part of the period.
AREA 2:
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FQIO20 FMEE 280417
MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
26/04/28 AT 1600UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (Wind gusts may be about 40% stronger than the averages given here).
PART 1: WARNING
- Strong gale force 9 over CRO.
- Gale force 8 continuing or expected over WAM, AMS and KER.
PART 2: GENERAL SYNOPSIS, 26/04/28 AT 1200UTC
- Extra-tropical Low JULUKA 990 hPa near 44S/55E, moving slowly south-eastwards.
- Low 979 hPa near 42S/37E, expected 985 hPa near 42S/52E at end.
- Cold front very soon over WAM and CRO and merging with extra-tropical low.
- High 1024 over AMS and KER, slowly moving eastwards.
PART 3: FORECAST FOR 24 HOURS FROM 26/04/28 at 1800UTC to 26/04/29 at 1800UTC
WAM (30S/40S, 50E/65E)
Rain, showers and thundersqualls.
WIND: North or Northwest 5 or 6, at times 7. Setting-up Westerly 7 to 8 by
South-Western at end. Severe gusts.
SEA : Moderate or rough, becoming very rough to high by Western later by
Westerly swell 4 to 5 m.
VIS : Very poor in precipitation.
AMS (30S/40S, 65E/80E)
Scattered showers.
WIND: Anticlockwise 3 to 5, gradually increasing North 5 or 6 soon by
NWestern, at times 7 and locally 8 at end with gusts.
SEA : Moderate or rough, very rough by South-Western at end.
VIS : Very poor in precipitation.
CRO (40S/50S, 50E/65E)
Rain, showers and squalls, at times thundery.
WIND: Northerly or Northwest 5 or 6, clockwise 7 to 8 over Eastern at
beginning. North 7 to 8, locally 9 over North-Eastern later. Clockwise
6 to 7 over North-Western at end. Severe gusts.
SEA : Rough or very rough. Northerly swell 4 m over Eastern soon then North-
West swell 4 to 5 m by North-Western at end.
VIS : Very poor in precipitation.
KER (40S/50S, 65E/80E)
Rain or showers in west.
WIND: Anticlockwise 3 to 5, increasing North 6 or 7 by Western, at times 8.
Severe gusts.
SEA : Moderate or rough, but very rough in southeast in SW swell, then in
west at end by North swell 4 to 5 m.
VIS : Very poor in precipitation.