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WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII. EAST OF 20E.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE 31st OF MAY 2024 AT 16:30 UTC.
FOR SOUTH-EAST SECTOR OF METAREA. VII, PREPARED BY REUNION, SEE AREA 2 BELOW.
NOTE: WX OBSERVATIONS.
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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 312200 TO 012200 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:
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1. CAPE WEST:S to SE 35 to 40 in places in the east.
2. CAPE EAST: S to SE 35 to 40 in places.
3. MARION FORTIES EAST: W to SW 35 in the south at times.
SYNOPTIC CHART 12:00Z
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High 33s61e 1030 hPa
Cold Front: 33s23e, 35s28e, 40s42e, 45s51e, 50s59e, cont. 55s62e into
56s50e (938 hPa).
AREA FORECAST:
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CAPE EAST (32.5S/40S, 20E/50E):
WIND : N to NW 15 to 25 in the north-east reaching 30 in places a
first, otherwise S to SE 10 to 20 reaching 30 to 40 in places.
It will become E 20 to 30 in the west.
VIS : Moderate in showers and rain.
SEA STATE: 3.0 to 4.0m SW swell reaching 5.0m in the north-west.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : N to NE 15 to 25 in the east, otherwise NW 10 to 15, but S to
SW 15 to 25 in the extreme south-west at first.
VIS : Good in places, otherwise moderate in showers and rain.
SEA STATE: 3.0 to 4.0m S to SE swell in the extreme south-west reaching
5.0m from midday.
MOZAMBIQUE CHANNEL:
WIND : S to SE 10 to 20 in the north and south-east, otherwise N to
NE 10 to 20 in the south-west.
VIS : Good.
MADAGASCAR EAST:
WIND : SE 10 to 20 reaching 25 in places, but E to NE 15 to 25
in the south.
VIS : Good in the south, otherwise moderate in showers and
thundershowers.
SEA STATE: 3.0m S to SW swell in the eastern parts.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to SW 20 to 30 reaching 35 in the south at times.
VIS : Moderate in showers and rain.
SEA STATE: 3.5 to 4.5m W to NW swell reaching 5.5 to 6.5m W to SW swell
in the south, but 7.0m in places in the extreme south.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
DATE: 24/05/31 at 1700 utc
AVERAGED WIND SPEED ON BEAUFORT SCALE. (Wind gusts may be stronger than averages given here).
PART 1: WARNING :
– Force 8 gale over CRO and KER.
PART 2: GENERAL SYNOPSYS, 24/05/31 at 1200 UTC :
– High 103 hPa near 33S/61E, moving slowly east-north-eastward.
– Low 936 hPa near 57S/50E with cold front CF associated and axis 41S/47E, 46S/55E, 51S/63E moving quickly eastward.
PART 3: FORECAST FOR 24 HOURS from 31/05/24 at 1800 UTC to 01/06/24 at 1800 UTC :
WAM (30S/40S,50E/65E) :
Rain and frontal showers under CF.
WIND: Becoming NW 5/6 reaching 7 with gusts ahead CF backing Southerly
4/5 behind CF over south-western area.
SEA : moderate to rough from north to south. SW swell 2 to 4m.
VIS : poor under precipitation.
AMS (30S/40S,65E/80E) :
Scattered showers.
WIND: Becoming anticlockwise 2/4 over northern zone and Westerly 5/6
over southern area.
SEA : rough to high from west to east, becoming rough to very rough. SW
swell 4 to 6m abating 2 to 3m over western area.
VIS : poor under precipitation.
CRO (40S/50S,50E/65E) :
Rain and frontal showers with strong gusts CF ( loc snow in the south).
WIND: NW 6/7 ahead of CF, reaching 8 with strong gusts over southern
area, backing SW 5/6 over northern area and Westerly 7/8 over
southern area.
SEA : rough to very rough. SW swell 3 to 5m.
VIS : poor to very poor under precipitation.
KER (40S/50S,65E/80E) :
Rain and frontal showers with strong gusts CF ( loc snow in the south).
WIND: Increasing NW 6 to 7 ahead CF then W 7/8 behind CF.
SEA : very rough to high from we