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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 30th OF JULY 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 301000 TO 311000 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: 35 to 45 in places in the south from midnight.
2. MARION FORTIES EAST: N to NW 35 in the west at first, otherwise W to
SW 35 to 40 in places.
SYNOPTIC CHART 06:00Z
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Low 45s32e 984 hPa
Low 29s31e 1018 hPa
High 34s01e 1032 hPa
Cold Front: 35s24e, 40s37e into 45s32e (984 hPa).
AREA FORECAST:
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CAPE EAST (32.5S/40S, 20E/50E):
WIND : W to NW 20 to 30 in the east until evening, otherwise SW 25 to
35 reaching 45 in places in the south from midnight.
VIS : Moderate in showers and rain.
SEA STATE: 3.5 to 4.5m SW swell reaching 5.5 to 6.5m in the west
spreading eastward, but 7.5 to 8.5m in places in the south.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : Anti-cyclonic 05 to 10 in the north-west, otherwise W to SW 15
to 25.
VIS : Good, but moderate in showers and rain in the south-west
spreading eastward.
SEA STATE: 3.0 to 4.0m SW swell reaching 5.0m in the extreme south-west
from midnight.
MOZAMBIQUE CHANNEL:
WIND : E to SE 10 to 20.
VIS : Good.
SEA STATE: 3.0m SW swell in the extreme south.
MADAGASCAR EAST:
WIND : SE 10 to 20 in the north, otherwise N to NW 10 to 15, becoming
variable 05 to 10 in the extreme south.
VIS : Good, but moderate in showers and rain in places.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : N to NW 15 to 25, reaching 35 in the west, becoming W to SW 20
to 30 reaching 40 in places.
VIS : Moderate to poor in showers and rain.
SEA STATE: 3.5 to 4.5m W to NW swell reaching 5.5 to 6.5m in the north-
west but 7.5m in the extreme north-west spreading eastward.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
DATE: 24/07/30 AT 0500UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE.).
PART 1: WARNING :
– NIL.
PART 2: GENERAL SYNOPSYS, 24/07/30 AT 0000 UTC :
– HIGH 1015 HPA NEAR 32S/70E EXTENDING INTO A RIDGE OF HIGH PRESSURE AXIS
ON 32S/70E, 43S/66E, 55S/63E, ALL MOVING EASTWARD AT 15/20 KT.
– LOW 966 HPA NEAR 62S/27E ASSOCIATED WITH A WAVING FRONT (CF) AXIS
62S/41E, 49S/54E, 39S/48E, 33S/55E AND MOVING EASTWARD AT 25/30 KT.
– LOW 981 HPA NEAR 46S/29E ASSOCIATED WITH A FRONT (CG) AXIS 50S/32E,
40S/36E, 33S/22E, MOVING EASTWARD AT 15/20 KT.
PART 3: FORECAST FOR 24 HOURS FROM 30/07/24 AT 0600 UTC TO 31/07/24 AT 0600UTC :
WAM (30S/40S,50E/65E) :
RAIN AND FRONTAL SHOWERS, THUNDERY SQUALLS AT TIMES.
WIND: NORTHERLY 4/5 OVER EASTERN AREA AND CLOCKWISE 4 TO 6 OVER WESTERN
AREA, BACKING WESTERLY 5 TO 7. GUSTS.
SEA : MODERATE TO ROUGH, SOON BECOMING ROUGH TO VERY ROUGH. SW SWELL
INCREASING BY 2 TO 4 M FROM EAST TO WEST.
VISI: POOR TO VERY POOR IN PRECIPITATIONS.
AMS (30S/40S,65E/80E) :
LIGHT SHOWERS AT THE BEGINNING, SOON TO BE FOLLOWED BY FRONTAL SHOWERS UNDER CF.
WIND: ANTICLOCKWISE 3 TO 5, VEERING NORTHERLY 5/6 AHEAD OF THE FRONT AND
BACKING WESTERLY 5 TO 7 BEHIND.
SEA : ROUGH. S SWELL 2 TO 4 M FROM WEST TO EAST.
VISI: POOR IN PRECIPITATIONS.
CRO (40S/50S,50E/65E) :
RAIN, SQUALLS AND FRONTAL SHOWERS UNDER CF, THEN UNDER CG.
WIND: NORTHERLY 4 TO 6 AHEAD OF CF, BECOMING CLOCKWISE 2 TO 4 BEHIND,
THEN INCREASING NORTHERLY 5 TO 7 AHEAD OF CG AND BACKING WESTERLY 5
TO 7 BEHIND CG. STRONG GUSTS.
SEA : ROUGH, LOCALLY VERY ROUGH OVER NORTHERN AREA. W SWELL 2 TO 4 M FROM
EAST TO WEST.
VISI: POOR IN PRECIPITATIONS.
KER (40S/50S,65E/80E) :
RAIN, SQUALLS AND FRONTAL SHOWERS UNDER CF AT THE END OF THE PERIOD OVER WESTERN AREA.
WIND: ANTICLOCKWISE 3 TO 5, BECOMING NORTHERLY 4 TO 6.
SEA : ROUGH, LOCALLY VERY ROUGH OVER EASTERN AREA AT THE BEGINNING OF THE
PERIOD. SOUTHERLY SWELL 3 TO 5 M AT THE BEGINNING OVER EASTERN
AREA, THEN ARRIVAL OF A NEW WESTERLY SWELL 2 TO 3M.
VISI: POOR IN PRECIPITATIONS.
ENDS DE CAPE TOWN RADIO/ZSC+
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