WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
21ST OF MAY 2026 AT 13:30 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 212200 TO 222200 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 to 40 in places in the west, spreading to the
central and south-east from the morning.
2. MARION FORTIES EAST : W to SW 35 to 45 in the east and south-east at
first
SYNOPTIC CHART 12:00Z
=====================
High 1024 hPa 33s03e, High 1026 hPa 38s35e
Low 1015 hPa 36s22e, Low 1009 hPa 50s20e, Low 980 hPa 51s52e
1. Cold Front: 41s13e 45s19e into 50s20e
2. Cold Front: 42s43e 43s52e 46s40e 45s55e 51s54e into 51s52e
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, but N to NW 20 to 30 in the
south-west, spreading to the south from the morning, otherwise, E
to SE 10 to 20, becoming SW 15 to 25 in the south-west from mid-
period.
VIS : Good, but moderate to poor in showers and thundershowers in the
south-west.
SEA STATE: 3.0 to 3.5m in the south-west, reaching 4.0 to 4.5m from the
morning, with SW swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : Variable 05 to 10 in the south-east and south-west, otherwise S to
SE 10 to 20 reaching 25 in the north-east at times.
VIS : Good.
TRISTAN (30S/40S, 00E/20W) :
WIND : Variable 05 to 10 in the north-east until mid-period, otherwise W
to NW 15 to 25, reaching 30 to 40 in places in the west, spreading
to the central and south-east from the morning.
VIS : Good in the north-east, otherwise moderate to poor in showers and
thundershowers.
SEA STATE: 3.0 to 4.0m (except in the east and north-east), but 4.5 to 5.5m
in the west and south-west, spreading to the central and south-
east from mid-period, while reaching 6.5 to 7.0m in the west,
with W to SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : N to NW 20 to 30 in the west and south-west, otherwise anti-
cyclonic 05 to 15.
VIS : Good, but moderate in showers and rain in the south and eastern
parts.
SEA STATE: 3.0 to 3.5m in the south-west, reaching 4.0m towards the end of
the period, with W to NW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : S to SW 20 to 30 in the east and south-east, but anti-cyclonic 05
to 15 in the central parts, spreading to the east from mid-period,
otherwise, cyclonic 15 to 25.
VIS : Good, but moderate to poor in showers and thundershowers in places
in the west, spreading to the central parts from mid-period. It
will become moderate in showers and rain in the west from late
morning.
SEA STATE: 3.0 to 4.0m in the eastern parts, reaching 5.0 to 6.0m in the
south-east until in the evening, with S to SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : N to NE 15 to 25 in the south-west, but SW 15 to 25 inthe south-
east, otherwise S to SE 15 to 25.
VIS : Good, but moderate in showers and rain in places in the northern
and western parts, as well as in the south-east towards the end of
the period.
SEA STATE: 3.0 to 4.0m in the central and eastern parts, with S to SE swell,
but SW in the south-east.
MOZAMBIQUE CHANNEL:
WIND : S to SE 05 to 15, reaching 20 to 30 in the south-east at times.
VIS : Good, but moderate in showers and rain in places in the west and
southern parts until in the afternoon.
SEA STATE: 3.0m in the central and south-east, with S to SE swell.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : S to SE 10 to 20, reaching 25 in the north.
VIS : Moderate in showers and rain in places.
SEA STATE: 3.0 to 4.0m in the southern parts, with S to SE swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to SW 20 to 30 in the central and eastern parts, reaching 35 to
45 in the east and south-east at first, otherwise anti-cyclonic 05
to 15 in the west, spreading to the east from tomorrow afternoon.
VIS : Good, but moderate in showers and rain in the east at first, as
well as north-west from the afternoon.
SEA STATE: 3.0 to 4.0m, but 5.0 to 6.0m in the central and eastern parts,
reaching 7.0 to 8.0m in the east and south-east until mid-period,
subsiding in the west from mid-period, with W to SW swell.
AREA 2:
=======
MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
26/05/21 AT 0500UTC
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.
- STRONG GALE EXPECTED OVER CRO AT THE END.
PART 2: GENERAL SYNOPSIS, 26/05/21 AT 0000UTC
- LOW 956 NEAR 57S/77E, MOVING RATHER SLOWLY EASTWARDS. ASSOCIATED COLD FRONT AXIS 30S/50E, 36S/66E, 44S/78E, EVACUATING AREAS LATER.
- NEW LOW EXPECTED 977 NEAR 54S/47E, MOVING RATHER SLOWLY NORTHEASTWARDS AND FILLING A LITTLE.
- RIDGE OVER WAM THEN AMS LATER.
PART 3: FORECAST FOR 24 HOURS FROM 26/05/21 AT 0600UTC TO 26/05/22 AT 0600UTC
WAM (30S/40S, 50E/65E)
RAIN, SHOWERS AND SQUALLS OVER NORTHERN AT FIRST AND OVER SOUTHERN AT THE END.
WIND: S OR SW 5 OR 6, LOCALLY 7 IN SOUTH, INCREASING W 7 OR 8 IN FAR SOUTH
LATER. GUSTS.
SEA : ROUGH OR VERY ROUGH LOCALLY HIGH OUVER SOUTHERN. SW SWELL.
VIS : POOR OR VERY POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
RAIN, SHOWERS AND SQUALLS OVER NORTHERN AT FIRST AND OVER SOUTHWESTERN AT THE END.
WIND: SW TO S 4 TO 5 LOCALLY 6 IN SOUTH BECOMING CLOCKWISE 6 TO 7 OVER
SOUTHWESTERN AT THE END. GUSTS.
SEA : ROUGH OR VERY ROUGH IN SW SWELL.
VIS : POOR OR VERY POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
RAIN, SHOWERS AND SQUALLS.
WIND: CLOCKWISE 7 OR 8 LOCALLY 9. SEVERE GUSTS.
SEA : VERY ROUGH OR HIGH. SW SWELL 5 OR 6 M.
VIS : POOR OR VERY POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
RAIN, SHOWERS AND SQUALLS.
WIND: WESTERLY 6 OR 7, LOCALLY 8 OVER NORTHERN AT THE END. GUSTS.
SEA : VERY ROUGH, LOCLLY HIGH IN WEST. SW SWELL INCREASING 5 OR 6 M IN WEST.
VIS : POOR OR VERY POOR IN PRECIPITATION.