WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
15TH OF APRIL 2026 AT 17:35 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 152200 TO 162200 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: W to NW 35 in the south-east, but SW to S 35 in the south-
west, drifting to the south towards mid-period.
2. CAPE EAST: E to NE 35 in the south and north-west towards the end of
the period.
3. DURBAN EAST: N to NE 35 in the extreme south-west towards the end of
the period.
4. MARION FORTIES EAST: W to NW 35 in the east at first, but in the
south-west towards mid-period, drifting to the
south-east towards the end of the period.
SYNOPTIC CHART 12:00Z
=====================
High 1029 hPa 38s16w, High 1023 hPa 40s59e
Low 1004 hPa 45s01e, Low 990 hPa 52s39e
1. Cold front: 39s09w 40s05e into 45s01e
2. Cold front: 32s26e 35s28e 40s33e 45s35e into 52s39e
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : SE to E 10 to 20.
VIS : Good.
VIS : Good, becoming moderate in showers and thundershowers in the
north-east towards the end of the period.
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 and south-west towards the end of the period,
with S to SW swell.
ST HELENA (15S/30S, 00E/20W):
WIND : SE to E 10 to 20, but NE 15 to 25 in the south-west.
VIS : Good but moderate in showers and rain in the central and south-
western parts.
SEA STATE: 3.0 to 3.5m in places, subsiding towards the end of the period,
with S to SW swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : SW 10 to 20 in the south-west, otherwise S to SE 10 to 20
reaching 25 to 30 in the north-east but in the south-east at
first.
VIS : Good, becoming moderate in showers and rain in the extreme south
towards the end of the period.
SEA STATE: 3.0 to 3.5m reaching 4.0m in the south-east until mid-period,
with S to SW swell.
TRISTAN (30S/40S, 00E/20W):
WIND : N to NE 20 to 30 in the north-west, otherwise anticyclonic 05 to
15 but S to SE 15 to 25 in the south-east.
VIS : Good, but moderate in showers and rain in the north-west, but in
the east at first.
SEA STATE: 3.0 to 4.0m in the south and east, reaching 4.5 to 5.0m in the
south-east, with SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : W to NW 10 to 20 in the east, reaching 25 to 35 in the south-
east, but SE 05 to 15 in the north-east until mid-period,
otherwise SW to S 15 to 25, reaching 30 to 35 in the south-west,
drifting to the south towards mid-period, while becoming S to SE
20 to 30 in the south-west.
VIS : Good, but moderate in showers and rain in the south-west,
spreading to the central and south-eastern parts by mid-period.
SEA STATE: 3.5 to 4.5m, reaching 5.0 to 5.5m in the southern parts, with S
to SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : Anticyclonic 05 to 15 in the central parts, otherwise E to NE 10
to 20 reaching 25 to 35 in the south and north-west towards the
end of the period, but W to NW 15 to 25 in the south-west.
VIS : Moderate to poor in showers and thundershowers in places, but
good in the south and extreme west.
SEA STATE: 3.0 to 3.5m in the central parts, reaching 4.0 to 5.0m in the
western parts, with SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : S to SW 10 to 20 in the north-west, otherwise SE to E 10 to 20
reaching 25 in the north and south-east, but N to NE 10 to 20 in
the west, reaching 25 to 35 in the extreme south-west towards the
end of the period.
VIS : Good, but moderate in showers and thundershowers in the east and
west, but poor in the south-west, spreading to the south towards
mid-period.
SEA STATE: 3.0 to 3.5m in the south-east until mid-period with SE swell,
becoming with S to SW swell in the extreme south-west towards
mid-period.
MOZAMBIQUE CHANNEL:
WIND : NE to E 05 to 15 in the south-west, otherwise S to SE 05 to 15,
reaching 20 to 25 in the south-east.
VIS : Good, but moderate in showers and thundershowers in places in the
northern parts.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : E to SE 05 to 15, becoming NE 05 to 15 in the south towards the
end of the period.
VIS : Moderate in showers and thundershowers in places.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to NW 15 to 25 reaching 30 to 35 in the east at first, but in
the south-west towards mid-period, drifting to the south-east
towards the end of the period.
VIS : Good, but moderate to poor in showers and rain in the south and
north-east, but in the east at first.
SEA STATE: 3.5 to 4.5m, with W to SW swell.
AREA 2:
=======
MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA
ACK (AMSTERDAM-CROZET-KERGUELEN)
26/04/15 AT 1600UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40%
STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALE OVER SOUTHEASTERN KER AT END.
PART 2: GENERAL SYNOPSIS, 26/04/15 AT 1200UTC
- COLD FRONT 35S/26E, 39S/30E, 45S/36E, 51S/39E EXPECTED OVER
SOUTHWESTERN CRO SOON.
- HIGH 1028 NEAR 41S/59E MOVING SLOWLY EASTWARD.
- DISTURBANCE OVER NORTHEASTERN WAM.
PART 3: FORECAST FOR 24 HOURS FROM 26/04/15 AT 1800UTC TO 26/04/16
AT 1800UTC
WAM (30S/40S, 50E/65E)
RAIN, SHOWERS AND OCCASIONAL THUNDERSTORMS OVER NORTHEASTERN AREA.
WIND:
- OVER NORTHERN : E 4 TO 6 DECREASING 3 TO 5 AT END. GUSTS IN
SQUALLS.
- OVER SOUTHERN : E 4 TO 6 AT FIRST, DECREASING ANTICLOCKWISE 2/4 AT
TIME 5 SOON.
SEA : MODERATE TO ROUGH. SW SWELL 2 TO 3 M ABATING.
VIS : POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
SHOWERS OVER NORTHERN. SQUALLS OVER NORTHWESTERN.
WIND: BECOMING ANTICLOCKWISE 3 TO 5 AT TIME 6/7 OVER FAR SOUTHEASTERN
SOON. GUSTS.
SEA : MODERATE TO ROUGH BECOMING VERY ROUGH OVER FAR SOUTHEASTERN
AREA. SW SWELL 2 TO 3 METERS.
VIS : POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
FRONTAL RAIN AND SHOWERS.
WIND: INCREASING NW5/6, INCREASING 7 IN SOUTH, AHEAD THE FRONT AND
BACKING TEMPORARILY 3 TO 5 BEHIND THEN INCREASING W 5/6 AT
TIMES 7 OVER FAR SOUTHERN AT END. GUSTS.
SEA : MODERATE TO ROUGH BECOMING VERY ROUGH IN THE FRONT IN SOUTHERN
AREA. SW SWELL 2 TO 3 M ABATING THEN W SWELL 2 TO 3 M BEHIND THE
FRONT.
VIS : POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
FRONTAL SHOWERS.
WIND: SW OR W 5/6 LOCALLY 7 WITH GUSTS AND INCREASING LOCALLY 8 OVER
SOUTHEASTERN AT END.
SEA : ROUGH TO VERY ROUGH. SW SWELL 2 TO 4M.
VIS : POOR IN PRECIPITATION.