WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
28TH OF APRIL 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 281000 TO 291000 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 30 to 40 in places in the central, spreading to the
east from the mid-period.
2. MARION FORTIES EAST: Cyclonic 35 to 45 in the west, spreading to the
north from the mid-period.
SYNOPTIC CHART 06:00Z
=====================
High 1035 hPa 37s00e
Low 987 hPa 44s37e, Low 52s04w.
1. Cold Front: 24s37e 31s43e 42s47e 36s36e 49s44e into 44s37e.
2. Cold front: 37s20w 39s09w 45s04w 52s00e into 52s04w.
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 from the mid-period, with S to SW 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 north-
west.
SEA STATE: 3.0m in the south, with S to SW swell.
ST HELENA (15S/30S, 00E/20W):
WIND : E to SE 10 to 20, reaching 25 over the central and eastern
parts spreading to the north from the second half of the period.
VIS : Good, but moderate in showers and rain over the central parts.
SEA STATE: 3.0 to 3.5m over the eastern and 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 in the
second half of the period.
VIS : Good, but moderate to poor in showers and thundershowers in
the south-west spreading north-eastwards to the west towards the
second half of the period.
SEA STATE: 3.0 to 3.5m in the south-west, spreading to the south from the
second half of the period, with NW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : Anticyclonic 05 to 15 in the west, but SE 15 to 25 in the
northern parts, otherwise S 15 to 20. It will become W to NW 10
to 20 in the south and south-west towards end of the period.
VIS : Good.
SEA STATE: 3.0m in the east, with S to SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : W to SW 15 to 25, but 30 to 40 in places in the central,
spreading to the east from mid-period, while
moderating to 10 to 15 in the west.
VIS : Moderate to poor in showers and thundershowers starting to clear
from the west in the second half of the period.
SEA STATE: 5.0 to 6.0 in the west, reaching 7.0 to 9.0 over the central and
southern parts, spreading to the eastern parts from mid-period,
while subside to 3.5 to 4.0 in the extreme south-west 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-west, spreading
to the south towards the mid-period.
VIS : Moderate in showers and rain in places.
SEA STATE: 3.0 to 4.0m in the west, reaching 5.0 to 6.0m in the south-west
spreading to the south from the second half of the period,
with SW swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 05 to 15, becoming 20 to 25 in the south from second half
of the period.
VIS : Good, but moderate in showers and thundershowers in places in the
north and south.
SEA STATE: 3.0m in the south-west, with SW swell.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : E to SE 05 to 10 .
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 west, spreading to
the north from mid-period.
VIS : Moderate to poor in showers and rain in places clearing from the
west and south during the second half of the period.
SEA STATE: 3.5m, becoming 5.0 to 6.0m in the north-west and south-west,
reaching 7.0 to 8.0m towards the second half of the period, with
NW swell, but SE in the south-west.
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 0400UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALE CONTINUING OR EXPECTED OVER WAM, CRO AND KER.
PART 2: GENERAL SYNOPSIS, 26/04/28 AT 0000UTC
- EXTRA-TROPICAL LOW JULUKA 1000 HPA NEAR 37S/51E, MOVING SLOWLY SOUTHEASTWARDS.
- 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 0600UTC TO 26/04/29 AT 0600UTC
WAM (30S/40S, 50E/65E)
RAIN, SHOWERS AND THUNDERSQUALLS.
WIND: NORTH OR NORTHWEST 5 OR 6, AT TIMES 7, BUT CLOCKWISE 7 OR 8 AT FIRST
IN SOUTHWEST. SEVERE GUSTS.
SEA: MODERATE OR ROUGH, LOCALLY VERY ROUGH IN SOUTHWEST.
VIS: POOR TO VERY POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
SHOWERS AND SQUALLS IN NORTHEAST.
WIND: ANTICLOCKWISE 3 TO 5, GRADUALLY INCREASING NORTH 5 OR 6 SOON IN FAR
WEST, AT TIMES 7 WITH GUSTS.
SEA: MODERATE OR ROUGH.
VIS: VERY POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
RAIN, SHOWERS AND SQUALLS, AT TIMES THUNDERY.
WIND: NORTH OR NORTHWEST 5 OR 6, AT TIMES 7, BUT OCCASIONALLY CLOCKWISE 7 OR
8 FROM NORTH. SEVERE GUSTS.
SEA: MODERATE OR ROUGH, BECOMING ROUGH OR VERY ROUGH.
VIS: POOR TO VERY POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
RAIN OR SHOWERS LATER IN WEST.
WIND: ANTICLOCKWISE 3 TO 5, INCREASING NORTH 6 OR 7 LATER IN WEST, AT TIMES
8. SEVERE GUSTS.
SEA: MODERATE OR ROUGH, BUT VERY ROUGH IN SOUTHEAST IN SW SWELL, THEN IN WEST AT END.
VIS: POOR IN PRECIPITATION.=