WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
10TH OF APRIL 2026 AT 16:00 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 102200 TO 112200 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. TRISTAN: N to NW 35 in the south-west and south for the
first half of the period.
SYNOPTIC CHART 12:00Z
=====================
High 1023 hPa 36s02w, High 1024 hPa 32s49e
Low 1010 hPa 21e39s
Low 988 hPa 30w38s
Cold Front 31w26s, 26w31s, 23w36s
AREA FORECAST:
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ASCENSION (06S/15S, 00E/20W):
WIND : SE to E 10 to 20.
VIS : Good but moderate in rain over the central and southern parts
for the first Half of the period.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 05 to 15, but SW 05 to 15 in the south-east.
VIS : Good, becoming moderate in showers and thundershowers
in the north-east for the first half of the period.
ST HELENA (15S/30S, 00E/20W):
WIND : E to SE 05 to 15, but N to NW 10 to 20 in the south and
south-west.
VIS : Good but moderate in showers and thundershowers in the south-
west.
SEA STATE: 3.0 to 4.0m in the south-west from the second half of the
period, with S to SW swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SW 10 to 20 in the north-east for the first half of the
period, otherwise S to SE 10 to 20.
VIS : Good, but moderate to poor in showers and thundershowers in
the south-east until mid-period.
TRISTAN (30S/40S, 00E/20W):
WIND : Anticyclonic 05 to 15 in the north-east, otherwise N to NW 15
to 25 reaching 30 to 35 in the south-west and south for the
first half of the period, becoming SW 20 to 30 in the south
west from mid-period spreading to the southern parts from the
second half of the period.
VIS : Good, but moderate to poor in showers and thundershowers
over the western and southern parts.
SEA STATE: 3.5 to 4.5m in the western parts reaching 5.0 to 6.0m in the
south-west spreading to the southern parts from the second
half of the period, with W NW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : Anti-cyclonic 05 to 15 but NW 15 to 25 in the south-west.
VIS : Good, but moderate to poor in showers and thundershowers over
the north-eastern and south-eastern parts from the first half
of the period.
SEA STATE: 3.0m in the south-west towards the end of the period, with W
to SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : Cyclonic 15 to 25 but N to NW 05 to 15 in the north-east at
first, becoming S to SE 05 to 15 in the west from the second
half of the period.
VIS : Good, but moderate to poor in showers and thundershowers
over the north-western parts from mid-period and the central
and southern parts drifting to the eastern parts from mid-
period.
SEA STATE: 3.0m in the western and southern parts with SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : Anticyclonic 10 to 20, but variable 05 to 15 in the north-east
and central parts becoming SW 15 to 25 in the south-west
towards mid-period .
VIS : Good.
SEA STATE: 3.0m in the eastern parts at first, with S to SW swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 05 to 15 but SW 05 to 10 in the east.
VIS : Good, but moderate in showers and thundershowers in the
extreme north.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : E to SE 10 to 20 but NE 05 to 10 in the south-west.
VIS : Good, but moderate in showers and thundershowers in places.
SEA STATE: 3.0m in the east, with S to SE swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : Cyclonic 15 to 25 in the northern parts, otherwise W to SW 10
to 20 becoming anti-cyclonic 05 to 10 in the north-west from
mid-period. It will become NW 15 to 25 in the south-west
towards the end of the period.
VIS : Good, but moderate to poor in showers and thundershowers in
the northern and south-western parts drifting to the north-
east from the second half of the period.
SEA STATE: 3.0 to 4.0m, 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)
26/04/10 AT 1600UTC
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 KER.
PART 2: GENERAL SYNOPSIS, 26/04/10 AT 1200UTC
- Low 974 hPa near 51S/76E, expected 970 hPa near 54S/80E at end.
- Arrival of a low 1003 hPa near 42S/50E at end.
- High 1025 near 33S/51E, slowly moving eastward, expected 34S/64E at end.
PART 3: FORECAST FOR 24 HOURS FROM 26/04/10 at 1800UTC to 26/04/11 at 1800UTC
WAM (30S/40S, 50E/65E)
Showers over South-Western at end.
WIND: Anticlockwise 3 to 5 setting-up North-West 5 to 6 later by South-Western, increasing 7 at end.
SEA: Moderate to rough, very rough over South-Eastern at beginning. South-West swell 2 to 3 m.
VISIBILITY: Poor under precipitation.
AMS (30S/40S, 65E/80E)
Few showers over Southern.
WIND: Westerly 3 to 4, 5 to 6 over Southern setting-up Anticlockwise 3 to 4 during the day all over the area.
SEA: Rough, very rough over Southern. South-West swell 3 to 4m.
VISIBILITY: Poor under precipitation.
CRO (40S/50S, 50E/65E)
Showers over Southern then squalls over North-Western at end.
WIND: South-West 5 to 6, locally 7 over Southern, decreasing Westerly 3 to 5 in the afternoon then becoming Clockwise 5 to 7 at end by North-Western with gusts.
SEA: Rough to very rough, becoming rough at end. Westerly swell 3 to 4 m.
VISIBILITY: Poor under precipitation.
KER (40S/50S, 65E/80E)
Showers over Southern area.
WIND: SW 6 to 7, locally 8 over South-Eastern at beginning, decreasing Westerly 3 to 4 by Western at end.
SEA: Very rough to high becoming rough to very rough at end. Westerly swell 3 to 5m.
VISIBILITY: Poor to very poor under precipitation.