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WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE 2nd OF AUGUST 2024 AT 17:30 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 022200 TO 032200 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. TRISTAN: SW 35 in the east but W to NW 35 to 40 in the south-west from
mid-period.
2. CAPE WEST: N to NW 35 in the south-east.
3. CAPE EAST:W to NW 35 in the south-west.
4. MARION FORTIES EAST: W to SW 35 to 45 but NW 35 in the west from mid-
period.
SYNOPTIC CHART 12:00Z
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High 1020 hPa 27s45e
Low 1018 hPa 33s35e
Low 1010 hPa 38s10e
Low 996 hPa 46s05e
Cold front: 30s02w 35s08e into 38s10e
Cold front: 33s10w 35s05w 40s00 into 46s05e
AREA FORECAST:
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ASCENSION (06S/15S, 00E/20W):
WIND : S to SE 15 to 20 reaching 25 in the west.
VIS : Good but moderate in showers and rain in the west.
ANGOLA (06S/15S, 00E/00N):
WIND : SE to S 10 to 20, but W to SW 05 to 10 in the extreme east.
VIS : Good.
SEA STATE: 3.0m S swell in the extreme south-east.
ST HELENA (15S/30S, 00E/20W):
WIND : S to SE 15 to 25 reaching 30 in the south-east.
VIS : Moderate in showers and rain.
SEA STATE: 3.0 to 4.0m in the south reaching 5.0m, SW swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 15 to 25 but SW 15 to 25 in the south-west becoming NW
15 to 25 at times.
VIS : Good.
SEA STATE: 3.0 to 4.0m in the south-west, SW swell in places in the east.
TRISTAN (30S/40S, 00E/20W):
WIND : SW 20 to 30 reaching 35 in the east parts during the first
half of the period, but anti-cyclonic 05 to 15 in the north-
west. It will become W to NW 20 to 30 in the
west from mid-period reaching 35 to 40 in the south-west.
VIS : Moderate in showers and rain.
SEA STATE: 3.0 to 4.0m, reaching 5.0 to 6.0m, SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : N to NW 20 to 30 in the east reaching 35 in the south-east,
otherwise S to SW 10 to 20 in the west reaching 30.
VIS : Moderate in showers and rain.
SEA STATE: 3.0 to 4.0m reaching 5.0 to 6.0m in the south, SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : W to SW 25 to 35 in the east otherwise W to NW 15 to 25
reaching 30 to 35 in the south-west .
VIS : Moderate in showers and rain in places.
SEA STATE: 3.5 to 4.5m reaching 5.0m in the west, SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : Anti-cyclonic 05 to 15 in the north-east and in the south-
west, otherwise NW 15 to 25 but NE 15 to 25 in the extreme
west.
VIS : Good but moderate in showers and rain in the extreme south.
SEA STATE: 3.0 to 4.0m, S to SW swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 10 to 20, but NE 10 to 20 in the south-west at times.
VIS : Good but moderate in showers in the north.
SEA STATE: 3.0m SW swell in the extreme south.
MADAGASCAR EAST:
WIND : SE 10 to 20 reaching 25 in the north but anti-cyclonic 05 to
15 in the south.
VIS : Good, but moderate in showers and rain in the east.
SEA STATE: 3.0 to 4.0m, SW swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to SW 20 to 30 reaching 40 to 45 in the east. It will become
NW 10 to 20 in the west from mid-period, reaching 30 to 35.
VIS : Moderate to poor in showers and rain.
SEA STATE: 3.5 to 4.5m reaching 5.5 to 6.5m, but 7.0 to 8.0m, W to SW
swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK(AMSTERDAM-CROZET-KERGUELEN)
DATE: 24/08/02 AT 1700 UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE STRONGER THAN AVERAGES GIVEN HERE).
PART 1: WARNING:
– GALE FORCE 8 OVER WAM AND AMS.
– STRONG GALE FORCE 9 OVER CRO.
– STORM FORCE 10 OVER KER.
PART 2: GENERAL SYNOPSYS, 24/08/02 AT 1200 UTC:
– LOW 966 NEAR 48S/71E WITH ASSOCIATED COLD FRONT OVER FAR EASTERN AMS AND KER, LEAVING THE AREA TOMORROW MORNING.
– COLD FRONT CG AXIS 37S/43E, 40S/55E, 47S/58E, 54S/51E QUICKLY MOVING EASTWARD.
– THUNDERY LOW OVER FAR NORTHWESTERN WAM AT END.
PART 3: FORECAST FOR 24 HOURS FROM 02/08/24 AT 1800 UTC TO 03/08/24 AT 1800 UTC:
WAM (30S/40S, 50E/65E):
FRONTAL SHOWERS WITH CG OVER SOUTHERN, THUNDERY SQUALLS OVER FAR NORTHWESTERN AT END. STRONG GUSTS OVER FAR SOUTHERN.
WIND : WEST TO SOUTHWEST 3/5 OVER FAR NORTHERN, 6/7 ELSEWHERE, LOCALLY 8 OVER FAR SOUTHERN.
SEA : VERY ROUGH TO HIGH, BECOMING ROUGH OVER NORTHWESTERN AT END. LONG SW SWELL 6/8M DECREASING 3/5M BY WESTERN SOON.
VISI : POOR WITH PRECIPITATIONS.
AMS (30S/40S, 65E/80E):
RAIN, SHOWERS AND THUNDERY SQUALLS OVER FAR EASTERN WITH CF AT START.
SHOWERS AND SQUALLS WITH CG OVER SOUTHERN.
WIND : SOUTHWESTERLY 7/8, LOCALLY 5/6 OVER FAR NORTHWESTERN. DECREASING W 4 TO 7 FROM NORTH TO SOUTH LATER.
SEA : VERY ROUGH TO HIGH, LOCALLY VERY HIGH OVER FAR SOUTHERN. LONG SW SWELL 6/8M PROPAGATING EASTWARD.
VISI : POOR.
CRO (40S/50S, 50E/65E):
SHOWERS AND SQUALLS, MORE FREQUENT WITH CG. SNOW OVER FAR SOUTHWESTERN LATER. STRONG GUSTS.WIND : WEST TO SOUTHWEST 8/9 DECREASING 5/6 OVER FAR WESTERN AT END.SEA : HIGH, WESTERLY SWELL 5/7 M.VISI : POOR.
KER (40S/50S, 65E/80E):
RAIN, SHOWERS AND THUNDERY SQUALLS WITH CF, SHOWERS AND SQUALLS BEHIND, AND WITH CG.
WIND : TEMPORARY CLOCKWISE 7/8 OVER FAR SOUTHERN AT START. SW 7/8 ELSEWHERE, TEMPORARY INCREASING 9/10 WITH VIOLENT GUST WITH CG OVER NORTHERN.
SEA : VERY ROUGH TO HIGH, LOCALLY VERY HIGH OVER FAR NORTHERN. WESTERLY SWELL 6/8M.
VISI : POOR.
ENDS DE CAPE TOWN RADIO/ZSC+
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