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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 20th OF MAY 2024 AT 17:10 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 202200 TO 212200 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: N to NW 35 to 40 in the extreme south-east at first,
otherwise W to SW 35 to 45 over the south-central parts spreading
towards the south-east by mid-period.
2. CAPE EAST: N to NW 35 in the south-west spreading towards the south-
east by the end of the period.
3. MARION FORTIES EAST: W to NW 35 to 40 in the extreme north-east and
south-east at first, as well as in the west towards mid-period
spreading towards the east by the end of the period while it reaches
40 to 45 in the south-west.
SYNOPTIC CHART 12:00Z
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High 1032 hPa 36s54.
Low 1018 hPa 33s30e Low 984 hPa 44s05e Low 972 hPa 55s46e.
Cold Front: 29s05w 35s04e 40s08e into 44s05e.
AREA FORECAST:
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CAPE EAST (32.5S/40S, 20E/50E):
WIND : N to NW 15 to 25 reaching 30 to 35 in the south-west spreading
towards the south-east by the end of the period, becoming W to
SW 15 to 25 in the west by mid-period.
VIS : Good, but moderate in showers and rain in the south-west.
SEA STATE: 3.0 to 4.0m in places, reaching 5.0m to 6.0m in the south-west
but 7.0 to 8.0m in the extreme south-west, SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : E to SE 15 to 25 in reaching 30 over the north-central parts,
but NE 15 to 25 in the south-west.
VIS : Good, but moderate in showers in the extreme east.
SEA STATE: 3.0 to 4.0m in the north-east with SE swell, as well as in the
extreme south-west with SW swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 15 to 25, reaching 30 in the in the extreme south-east
and north-east.
VIS : Good, but moderate in showers and thundershowers in the north.
SEA STATE: 3.0 to 3.5m in the south-east, SE swell.
MADAGASCAR EAST:
WIND : S to SE 20 to 30.
VIS : Moderate in showers and thundershowers.
SEA STATE: 3.0 to 3.5m in the south-east, SE swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : Anti-cyclonic 05 over the central parts, otherwise W to NW 15
to 25 reaching 35 to 40 in the extreme north-east and south-
east at first, as well as in the west towards mid-period
spreading towards the east by the end of the period while it
reaches 40 to 45 in the south-west.
VIS : Good, but moderate to poor in showers and rain in the north
spreading towards the south-east by mid-period.
SEA STATE: 5.0 to 6.0m, reaching 7.5 to 8.5m in places in the south, E to
SE swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
DATE: 24/05/20 AT 1700 UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE STRONGER THAN AVERAGES GIVEN HERE).
PART 1: WARNING :
– STRONG GALE OVER CRO.
– GALE FORCE 8 OVER KER.
PART 2: GENERAL SYNOPSYS, 24/05/20 AT 1200 UTC :
– THE COLD FRONT CF OVER NORTHEAST AMS LEAVES AREA ON VALIDITY.
– HIGH 1034 HPA OVER WAM, SLOW-MOVING.
– THE COLD FRONT CG MOVES OVER CRO THEN KER WITH RAPID WESTERLY FLOW, THE ASSOCIATED LOW MOVES OVER SOUTH OF 50S.
PART 3: FORECAST FOR 24 HOURS FROM 20/05/24 AT 1800 UTC TO 21/05/24 AT 1800 UTC :
WAM (30S/40S,50E/65E) :
FEW SHOWERS, MORE FREQUENT OVER SOUTHERN PART WITH CG.
WIND: ANTICLOCKWISE 3 TO 5 INCREASING SE 6 OVER NORTHEASTERN PART AT FIRST AND NW 6/7 OVER SOUTHERN PART.
SEA: MODERATE TO ROUGH. SW SWELL 3 M, DECREASING, THEN 3 TO 3.5 M OVER SOUTHERN PART.
VISI: POOR IN PRECIPITATIONS.
AMS (30S/40S,65E/80E) :
RAIN AND FRONTAL SHOWERS OVER NORTHEASTERN PART LEAVING AREA.
WIND: NW 6/7 AHEAD CF OVER FAR NORTHEASTERN PART AT FIRST, BACKING SOUTHERLY 6/7 BEHIND, DECREASING 5/6 LATER AND BECOMING ANTICLOCKWISE
3 TO 5 OVER WESTERN PART.
SEA: ROUGH. SW SWELL, 2.5 TO 3.5 METERS.
VISI: POOR IN PRECIPITATIONS.
CRO (40S/50S,50E/65E) :
RAIN AND FRONTAL SHOWERS UNDER CG.
WIND: NW 6/7 INCREASING 8/9 AHEAD CG AND BACKING WESTERLY 6 TO 8 BEHIND THEN DECREASING 5/6. NW 6/7 OVER WESTERN PART AT END.
SEA: VERY ROUGH TO HIGH. LONG SW SWELL 3 TO 4 METERS THEN 4 TO 6.
VISI: POOR TO VERY POOR.
KER (40S/50S,65E/80E) :
FRONTAL RAINS AND SHOWERS LATER.
WIND: WEST OR SOUTH 4/5 INCREASING NW 6/7 THEN 7/8 AHEAD CG, BACKING WESTERLY 6/7 BEHIND.
SEA: ROUGH TO VERY ROUGH. LONG W SWELL 3 METERS THEN 4 TO 5 METERS OVER WESTERN PART.
VISI: POOR IN PRECIPITATIONS.
ENDS DE CAPE TOWN RADIO/ZSC+
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