WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
10th OF MAY 2026 AT 16:00 UTC.
AREA 1:
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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.
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:
====================
1. TRISTAN : W to NW 35 in the south-east until mid-period.
2. CAPE WEST : W to SW 35 to 40 over the central parts but 45 to 50 in the
east, drifting to the south-east by mid-period.
3. CAPE EAST : W to NW 35 to 40 in places in the north-west and central
south, reaching 50 to 60 in the south-west towards the end of
the period.
4. DURBAN EAST: W to NW 35 in the south-west until mid-period.
5. MARION FORTIES EAST: N to NW 35 to 40 in the west and the central parts
drifting to the south-west towards mid-period.
SYNOPTIC CHART 12:00Z
=====================
High 1026 hPa 30s14w
Low 982 hPa 40s23e, Low 998 hPa 38s02e
1. Cold Front: 32s00e 33s01e 37s03e into 38s02e
2. Cold Front: 28s22e 31s25e 36s26e 41s23e into 40s23e
AREA FORECAST:
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ASCENSION (06S/15S, 00E/20W):
WIND : E to SE 10 to 20.
VIS : Good.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 10 to 20.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : SE to E 10 to 20 in the north, otherwise anticyclonic 05 to 15.
VIS : Good.
SEA STATE: 3.0 to 3.5m in the south-east, with S to SW swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : Variable 05 to 10 in the south, otherwise S to SE 05 to 15,
reaching 20 to 25 in places in the north-east by mid-period.
VIS : Good, but moderate in showers and rain in the south.
SEA STATE: 3.0 to 3.5 reaching 4.0 to 4.5m in the south, with SW swell.
TRISTAN (30S/40S, 00E/20W):
WIND : Anticyclonic 05 t 10 in the north, otherwise W to NW 10 to 20,
reaching 25 to 35 in the south-east until mid-period.
VIS : Good, but poor in showers and rain in the south-west but,
moderate over the south-eastern parts.
SEA STATE: 3.0 to 4.0m except in the north-west, reaching 4.5 to 6.0m in the
south and east, with SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : W to SW 15 to 25, reaching 30 to 40 over the central but 45 to 50
in the east, drifting to the south-east by mid-period.
VIS : Good in the north-west, otherwise moderate in showers and rain,
but poor in the south-east.
SEA STATE: 5.0 to 6.0m, but 6.5 to 7.5m over the eastern and central parts,
with W to SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : W to NW 15 to 25 over the western half, reaching 30 to 40 in
places in the north-west and central south, reaching 50 to 60 in
the south-west towards the end of the period.
VIS : Good in the east until mid-period, otherwise moderate to poor in
the west but over the central parts by mid-period.
SEA STATE: 3.0 to 4.0m over the eastern half with NW swell in the east, but
5.0 to 6.0 in the western half, reaching 7.0 to 9.0m in the
extreme western parts by mid-period, with SW to W swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : N to NE 10 to 20 in the east, otherwise W to NW 20 to 30,
reaching 30 to 35 in the south-west until mid-period.
VIS : Good, but moderate to poor in showers and thundershowers the
south-west, central and the south-eastern parts towards the end
of the period.
SEA STATE: 3.0 to 4.0m in the extreme south-west, with S to SW swell.
MOZAMBIQUE CHANNEL:
WIND : Variable 05 to 10, but N to NE 10 to 20 in the south.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : E to NE 05 to 15 in the south, otherwise S to SE 15 to 25, but
variable 05 to 10 over the central parts.
VIS : Good in the south-east, otherwise moderate in rain in places.
SEA STATE: 3.0m in the north at first, with SE swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : N to NW 15 to 25, reaching 30 to 40 in the west and the central
parts drifting to the south-west towards mid-period.
VIS : moderate to poor in showers and rain, becoming good in the south-
west by the end of the period.
SEA STATE: 3.0 to 3.5m, reaching 4.0 to 5.0m in the north-west by mid-period
spreading to the south-west by the end of the period, with N to
NW swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA
ACK (AMSTERDAM-CROZET-KERGUELEN)
26/05/10 AT 1500UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40%
STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- NIL.
PART 2: GENERAL SYNOPSIS, 26/05/10 AT 1200UTC
- FRONTOLYSIS FRONTS OVER WAM AND CRO
- HIGH 1025 OVER WAM AND AMS NEAR 33S/64E ALMOST STATIONARY WITH A
RIDGE EXTENDING TOWARD SOUTHERN AREA.
PART 3: FORECAST FOR 24 HOURS FROM 26/05/10 AT 1800UTC TO 26/05/11
AT 1800UTC
WAM (30S/40S, 50E/65E)
FRONTAL RAIN AND SHOWERS. SQUALLS.
WIND:BECOMING ANTICLOCKWISE 3 TO 5. GUSTS IN SQUALLS.
SEA : MODERATE, LOCALLY ROUGH.
VIS : POOR TO VERY POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
SHOWERS AND SQUALLS.
WIND: SW 5/6 AT TIME 7 IN SOUTH-EAST AT FIRST, DECREASING
ANTICLOCKWISE 3 TO 4 AT TIME 5 BY WESTERN AREA. GUSTS IN SQUALLS.
SEA : ROUGH TO VERY ROUGH, LOCALLY HIGH IN SOUTH-EAST AT FIRST
BECOMING GRADUALLY MODERATE BY WESTERN AREA SOON. SW SWELL 2 TO 4 M
ABATING.
VIS : POOR TO VERY POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
FRONTAL RAIN AND SHOWERS. SQUALLS.
WIND: VARIABLE 2 TO 4 AT TIME 5, INCREASING N 5/6 OVER WESTERN AREA
LATER. GUSTS IN SQUALLS.
SEA : ROUGH TO MODERATE. SW SWELL BETWEEN 2 TO 4 METERS.
VIS : POOR TO VERY POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
SHOWERS AND SQUALLS OVER SOUTHEASTERN AREA AT FIRST, THEN OVER FAR
NORTHWESTERN SOON.
WIND: SW 5/6 AT TIME 7 OVER EASTERN AREA AT FIRST, DECREASING
ANTICLOCKWISE 2 TO 4 BY WESTERN AREA SOON. SEVERE GUSTS.
SEA : ROUGH TO VERY ROUGH, LOCALLY HIGH OVER NORTHEASTERN AT FIRST,
BECOMING MODERATE TO ROUGH BY WESTERN AREA. SW SWELL 2 TO 4 METERS
ABATING.
VIS : POOR TO VERY POOR IN PRECIPITATION.