WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
20TH OF MAY 2026 AT 16:15 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 202200 TO 212200 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. MARION FORTIES EAST: W to SW 35 to 40 in the southern half, drifting to
the eastern parts towards the end of the period.
SYNOPTIC CHART 12:00Z
=====================
High 1033 hPa 41s27e
Low 1005 hPa 51s07e
1. Cold Front: 38s02w 40s00w 45s07e into 51s07e
AREA FORECAST:
==============
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, but SW 05 to 10 in the east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : Variable 05 to 10 in the south-east, otherwise E to SE 10 to 20
but N to NW 15 to 25 in the south-west.
VIS : Good, but moderate in showers and thundershowers in the extreme
south-west.
SEA STATE: 3.0 to 3.5m in the extreme south-west, with SW swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : Variable 05 to 10 in the south-east, otherwise S to SE 10 to 20
reaching 25 in the north-east towards the end of the period.
VIS : Good.
TRISTAN (30S/40S, 00E/20W) :
WIND : Variable 05 to 10 in the extreme north-east, otherwise N to NW 15
to 25 reaching 30 in the south-west towards mid-period.
VIS : Good, but moderate to poor in showers and thundershowers in the
southern and western halves.
SEA STATE: 3.0 to 4.0m in the southern and western halves, reaching 4.5 to
5.0m in the south-west towards mid-period, with W to SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : NW 15 to 25 in the south-west, otherwise S to SE 10 to 20
reaching 25 in the south-east at first, but variable 05 to 10 in
the north-west and extreme north-east. It will become W to SW 10
to 20 in the south-east towards the end of the period.
VIS : Good, but moderate in showers and thundershowers in the southern
parts.
SEA STATE: 3.0 to 3.5m in the east at first with S to SE swell, but with W
to NW swell in the south-west towards the end of the period.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : S to SW 15 to 25 in the east, otherwise E to NE 10 to 20 reaching
25 to 30 in west and north-west, but anticyclonic 05 to 15 in the
central parts. It will become W to SW 10 to 20 in the extreme
west towards the end of the period.
VIS : Good, but moderate to poor in showers and thundershowers in
places in the east and west.
SEA STATE: 3.0 to 4.0m in the west and central parts, reaching 5.0 to 6.0m
in the east, with SW swell, but with E to SE swell in the west.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : S to SE 10 to 20, but E to NE 15 to 25 in the south-west,
spreading to the north-west towards the end of the period.
VIS : Moderate in showers and thundershowers in places, becoming good
in the south from mid-period.
SEA STATE: 3.0 to 4.0m in the south-east, spreading to the north-east
towards the end of the period, with S to SE swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 10 to 20, reaching 25 to 30 in the south-east.
VIS : Moderate in showers and rain in places.
SEA STATE: 3.0m in the south-east, spreading to the central parts towards
the end of the period, with S to SE swell.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : S to SE 05 to 15, reaching 20 to 25 in the north.
VIS : Moderate in showers and rain in places.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to SW 20 to 30 reaching 35 to 40 in the southern half, drifting
to the eastern parts towards the end of the period.
VIS : Good, but moderate in showers and rain in the south, drifting to
the eastern parts towards mid-period.
SEA STATE: 3.0 to 4.0m reaching 5.0 to 6.0m in the south-west, drifting to
the east towards mid-period, 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)
26/05/20 AT 1600UTC
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, 26/05/20 AT 1200UTC
- LOW 965 NEAR 54S/73E, MOVING RATHER SLOWLY SOUTHEASTWARDS AND
DEEPENING. ASSOCIATED COLD FRONT AXIS 32S/52E, 38S/66E, 49S/78E,
EVACUATING AREAS LATER.
- NEW LOW EXPECTED 979 THE 21 AT 06 UTC NEAR 53S/48E, MOVING RATHER
SLOWLY NORTHEASTWARDS AND FILLING A LITTLE.
- HIGH 1023 NEAR 33S/90E, MOVING EASTWARDS.
PART 3: FORECAST FOR 24 HOURS FROM 26/05/20 AT 1800UTC TO 26/05/21
AT 1800UTC
WAM (30S/40S, 50E/65E)
RAIN, SHOWERS AND SQUALLS.
WIND: SOUTH OR SOUTHWEST 5 OR 6, LOCALLY 7 IN SOUTH, DECREASING 4 OR
5 VERY SOON, INCREASING WEST 7 OR 8 IN FAR SOUTH LATER. GUSTS.
SEA: ROUGH OR VERY ROUGH IN SW SWELL, LOCALLY HIGH IN FAR SOUTH.
VISI: POOR OR VERY POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
RAIN, SHOWERS AND SQUALLS.
WIND: NORTHWEST 5 OR 6, AT TIMES 7 IN SOUTH, BACKING SOUTHWEST BEHIND
THE FRONT, DECREASING 4 OR 5 LATER. GUSTS.
SEA: MODERATE TO ROUGH, BECOMING ROUGH OR VERY ROUGH IN SW SWELL.
VISI: POOR OR VERY POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
RAIN, SHOWERS AND SQUALLS.
WIND: SOUTHWEST 6 OR 7, AT TIMES 8, DECREASING 5 OR 6 SOON, BECOMING
CLOCKWISE 7 OR 8 LATER, MAINLY WESTERLY. SEVERE GUSTS.
SEA: VERY ROUGH OR HIGH. SW SWELL 5 OR 6 M.
VISI: POOR OR VERY POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
RAIN, SHOWERS AND SQUALLS.
WIND: WESTERLY 6 OR 7, LOCALLY 8 IN EAST AT FIRST, DECREASING 5 OR 6
IN WEST LATER. GUSTS.
SEA: VERY ROUGH, LOCLLY HIGH IN WEST. SW SWELL INCREASING 5 OR 6 M IN
WEST.
VISI: POOR OR VERY POOR IN PRECIPITATION.=