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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 28th OF MAY 2024 AT 08:30 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 281000 TO 291000 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 EAST: W to NW 35 in the extreme south-east at first.
2. MARION FORTIES EAST: W to SW 35 to 45 in the south-east.
SYNOPTIC CHART 06:00Z
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High 1022 hPa 23s04w High 1028 hPa 26s35e.
Low 1016 hPa 26s12e Low 1012 hPa 34s09w Low 980 hpa 55s12e
Low 976 hPa 52s46e.
Cold front: 41s10e 45s14e 50s16e 55s12e 60s14e
AREA FORECAST:
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CAPE EAST (32.5S/40S, 20E/50E):
WIND : N to NE 10 to 20 in the north-west, otherwise W to NW 10 to 20
reaching 35 in the extreme south-east at first, becoming S to
SW 15 to 25 in the south-east by mid-period.
VIS : Good, but moderate in showers and rain in the south-east.
SEA STATE: 3.5 to 4.5m reaching 5.5 to 6.0m in the south-east, SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : NE 15 to 25 in the south-west, otherwise E to SE 10 to 20.
VIS : Good, but moderate in showers in the north.
SEA STATE: 3.0 to 4.0m in places, SW swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 15 to 25.
VIS : Moderate in showers in places.
SEA STATE: 3.0 to 3.5m in the south-east, S to SW swell.
MADAGASCAR EAST:
WIND : S to SE 15 to 25 reaching 30 in the west.
VIS : Good in the extreme south, otherwise moderate in showers.
SEA STATE: 3.0 to 3.5m in the south and central towards mid-period,
swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to SW 15 to 25 reaching 35 to 45 in the south-east becoming
N to NW 10 to 20 in the west by mid-period spreading towards
the east by the end of the period.
VIS : Moderate in showers and rain in places.
SEA STATE: 6.0 to 7.0m, reaching 8.0 to 9.0m but 10.5 to 11.5m in the
south-west, 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: 24/05/28 AT 0500UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE.).
PART 1: WARNING:
– STORM FORCE 10 OVER SUD-OUEST KER AT FIRST.
– STRONG GALE FORCE 9 OVER CRO AND KER.
– GALE FORCE 8 OVER WAM AND AMS.
PART 2: GENERAL SYNOPSYS, 24/05/28 AT 0000 UTC:
– LOW 952 HPA NEAR 51S/66E, MOVING RATHER QUICKLY EAST-SOUTH-EASTWARD. COLD FRONT AXIS: 28S/48E, 31S/59E, 40S/72E, 52S/74E (CF).
– LOW 965 HPA NEAR 53S/35E, WITH COLD FRONT 46S/20E, 44S/32E, 50S/46E, 55S/36E MOVING EASTWARD QUICKLY OVER CRO AND KER (CG).
PART 3: FORECAST FOR 24 HOURS FROM 28/05/24 AT 0600 UTC TO 29/05/24 AT 0600UTC:
WAM (30S/40S, 50E/65E):
SHOWERS.
WIND: ANTICLOCKWISE 3 TO 5 AU NORD, INCREASING W 5 TO 7 IN SOUTH, TEMPORARILY W 8 OVER SOUTHERN DURING THE PERIOD.
SEA: ROUGH TO VERY ROUGH, VERY ROUGH TO HIGH IN SOUTH. SW SWELL 3 TO
4 M.
VISI: POOR IN PRECIPITATIONS.
AMS (30S/40S, 65E/80E):
FRONTAL SHOWERS ( CF). SQUALLY WEATHER IN NORTH-EASTERN AT FIRST.
WIND: NW 4 TO 6 AHEAD THE FRONT OVER EASTERN THEN INCREASING W 4 TO
6 OVER NORTHERN, 7/8 WITH SEVERE GUSTS OVER SOUTHERN BEHIND THE FRONT.
SEA: MODERATE TO ROUGH, BECOMING VERY ROUGH TO HIGH BY SOUTH-WESTERN AREA SOON. SOUTH-WEST SWELL 2 TO 4 M.
VISI : POOR TO VERY POOR IN PRECIPITATIONS.
CRO (40S/50S, 50E/65E):
RAIN AND FRONTAL SHOWERS ( CG). SQUALLS.
WIND: MAINLY W 6 TO 8 INCREASING 9 OVER NORTHERN AREA DECREASING SW 3 TO 5 OVER WESTERN AREA AT END. SEVERE GUSTS.
SEA: VERY ROUGH TO HIGH, LOCALLY VERY HIGH OVER NORTHERN. W SWELL 4 TO 6 M. SEVERE WIND SEA.
VISI: VERY POOR IN PRECIPITATIONS.
KER (40S/50S, 65E/80E):
RAIN AND FRONTAL SHOWERS AND SQUALLS.
WIND: W OR NW 6/8, REACHING 9/10 OVER FAR SOUTH-WESTERN AT FIRST.
SEVERE GUSTS. S 6/7 WITH GUSTS OVER SOUTH-WESTERN LATER.
SEA: VERY ROUGH TO HIGH, VERY HIGH OVER SOUTH-WESTERN PART AT FIRST.
WESTERLY SWELL 4 TO 6 M.
VISI: VERY POOR IN PRECIPITATIONS.
ENDS DE CAPE TOWN RADIO/ZSC+
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