WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
16TH 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 161000 TO 171000 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 WEST: Cyclonic 35 in the south.
2. MARION FORTIES EAST: W to NW 35 to 40 in the south during the first half
of the period.
SYNOPTIC CHART 06:00Z
=====================
High 1032 hPa 47s13w, High 1028 hPa 38s69e
Low 1002 hPa 40s09e, Low 990 hPa 52s39e
1. Cold front: 33s01e 36s09e into 40s09e
AREA FORECAST:
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ASCENSION (06S/15S, 00E/20W):
WIND : E to SE 10 to 20.
VIS : Good, but moderate in showers and thundershowers in the north and
north-east.
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 at times in the
north and east.
SEA STATE: 3.0m in the south-east, with S to SW swell.
ST HELENA (15S/30S, 00E/20W):
WIND : S to SE 10 to 20 in the south-east, otherwise E to NE 15 to 25.
VIS : Good but moderate in showers and thundershowers in the central
and south-western parts.
SEA STATE: 3.0 to 3.5m in the east at first, as well as in the south-east
and south-west from mid-period, with S to SW swell, but NE in the
south-west.
TRADES (15S/30S, 00E/WEST COAST):
WIND : SW 15 to 25 in the south, otherwise S to SE 10 to 20, reaching 25
in the north-east at times.
VIS : Good, becoming moderate in showers and rain in the south
towards mid-period.
SEA STATE: 3.0 to 3.5m reaching 4.0m in the south-east at first, as well as
south from tomorrow morning, with S to SW swell.
TRISTAN (30S/40S, 00E/20W):
WIND : S to SE 15 to 25 in the extreme east, but N to NE 20 to 30 in the
west, otherwise anti-cyclonic 05 to 15.
VIS : Good, but moderate in showers and rain in the north-west,
spreading to the south-west from mid-period.
SEA STATE: 3.0 to 4.0m in the west and east, reaching 4.5 to 5.0m in the
south-east until mid-period, with SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : Cyclonic 20 to 30 in the south and south-east, reaching 35 in the
south, otherwise S to SW 15 to 25, reaching 30 in places. It will
become NW 15 to 25 in the north-east towards the end of the
period.
VIS : Good in the north-east, otherwise moderate to poor in showers and
thundershowers.
SEA STATE: 3.0 to 4.0m, reaching 5.0 to 6.0m in the south and west,
spreading to the central parts from mid-period, with S to SW
swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : Variable 05 to 10 in the east, but W to NW 15 to 25 in the
extreme west, otherwise N to NE 10 to 20, reaching 25 to 30 in
the north-west, spreading to the south from mid-period.
VIS : Moderate to poor in showers and thundershowers in places in the
west, and south-east, otherwise good.
SEA STATE: 3.0 to 4.0m in the central and west, reaching 4.5m in the south-
west at first, with SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : S to SE to 15 in the east, otherwise N to NW 05 to 15, reaching
20 to 30 in the west towards the end of the period.
VIS : Good, but moderate in showers and thundershowers in places in the
west.
SEA STATE: 3.0m in the south-west, with SW swell.
MOZAMBIQUE CHANNEL:
WIND : Variable 05 to 10 in the central parts, but E to NE 05 to 15 in
the south-west, otherwise S to SE 05 to 15, reaching 20 to 25 in
the south-east at first.
VIS : Good, but moderate in showers and thundershowers in places in the
north-west.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : Variable 05 to 10 in the south, otherwise E to SE 05 to 15.
VIS : Good, but moderate in showers and thundershowers in places in the
north-east.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : Variable 05 to 10 in the north, otherwise W to NW 15 to 25,
reaching 30 to 40 in the south during the first half of the
period.
VIS : Good, but moderate in showers and rain in the south at first,
and in the north-east, as well as south-west towards the end of
the period.
SEA STATE: 3.5 to 4.5m in the west and south, 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)
26/04/16 AT 0500UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALE EXPECTED OVER SOUTHERN KER.
PART 2: GENERAL SYNOPSIS, 26/04/16 AT 0000UTC
- COLD FRONT 42S/44E, 49S/49E, 58S/54E EXPECTED OVER SOUTHWESTERN CRO AT FIRST, MOVING SLOWLY NORTHEASTWARD.
- HIGH 1028 NEAR 39S/65E MOVING SLOWLY EASTWARD.
- DISTURBANCE OVER NORTHEASTERN WAM.
PART 3: FORECAST FOR 24 HOURS FROM 26/04/16 AT 0600UTC TO 26/04/17 AT 0600UTC
WAM (30S/40S, 50E/65E)
RAIN, SHOWERS AND OCCASIONAL THUNDERSTORMS OVER NORTHEASTERN AREA.
WIND : EASTERLY 3 TO 5 AT TIMES 6 OVER NORTHEASTERN AREA. GUSTS IN SQUALLS.
SEA : MODERATE TO ROUGH.
VIS : POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
WIND : ANTICLOCKWISE 3 TO 5 BUT SW 5/6 OVER FAR SOUTHEASTERN AREA AT FIRST.
SEA : MODERATE TO ROUGH LOCALLY VERY OVER FAR SOUTHEASTERN AREA AT FIRST.
SW SWELL 2 TO 3 METERS ABATING.
VIS : GENERALLY GOOD.
CRO (40S/50S, 50E/65E)
FRONTAL RAIN AND SHOWERS.
WIND : NORTHWESTERLY 5 TO 7 AHEAD OF THE FRONT DECREASING SOUTHWESTERLY 3
TO 5 BEHIND BUT WESTERLY 5/6 AT TIMES 7 OVER FAR SOUTHERN AREA.
GUSTS.
SEA : MODERATE TO ROUGH OVER NORTHERN AREA BUT ROUGH TO VERY ROUGH BY W
SWELL 2 TO 3 METERS OVER SOUTHERN AREA.
VIS : POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
FRONTAL SHOWERS.
WIND : SW OR W 4 TO 6 OVER NORTHERN AREABUT 5 TO 7 AT TIMES 8 OVER SOUTHERN
AREA. SEVERE GUSTS OVER SOUTHERN AREA.
SEA : MODERATE TO VERY ROUGH FROM NW TO SE. SW SWELL 2 TO 4 METERS.
VIS : POOR IN PRECIPITATION.