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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 16th 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 161000 TO 171000 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 south, becoming SW 35 in the extreme
south-west spreading towards the south-east by the end of the period.
2. MARION FORTIES EAST: W to NW 35 to 40 in the north-east at first, as
well as in the north-west by mid-period spreading towards the south-
east by the end of the period.
SYNOPTIC CHART 06:00Z
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High 1026 hPa 30s50e.
Low 980 hPa 50s19e Low 976 hPa 54s43e Low 976 hPa 54s45e
Cold Front: 38s08e 40s14e 45s22e into 50s19e.
AREA FORECAST:
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CAPE EAST (32.5S/40S, 20E/50E):
WIND : W to NW 15 to 25 reaching 35 in the south, becoming SW 20 to
30 in the west reaching 35 in the extreme south-west spreading
towards the south-east by the end of the period.
VIS : Good over the central parts in the first half of the period,
otherwise moderate in showers and rain.
SEA STATE: 3.0 to 4.0m in places, but 4.5 to 5.5m in the south reaching
7.0 to 7.5m in the extreme south-west spreading towards the
south-central parts by the end of the period, SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : N to NE 10 to 20 in the north-east, otherwise SE 10 to 20 but
N to NW 10 to 20 in the south, becoming S to SW 15 to 25 in
the extreme south-west by mid-period.
VIS : Good, but moderate in showers in the north.
SEA STATE: 3.0 to 3.5m in the south-west in the second half of the
period, SW swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 15 to 25 reaching 30 in the extreme north-east.
VIS : Good in the extreme south, otherwise moderate in showers and
rain.
MADAGASCAR EAST:
WIND : E to SE 20 to 30, but N to NE 10 to 20 in the extreme south.
VIS : Good in the extreme south, otherwise moderate in showers and
thundershowers, but poor in the north-east.
SEA STATE: 3.0 to 3.5m in the north, SE swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to NW 20 to 30, reaching 35 to 40 in the north-east at
first, as well as in the north-west by mid-period spreading
towards the south-east by the end of the period. It will
become SW 20 to 30 in the south-west in the second half of the
period.
VIS : Moderate to poor in showers and snow-showers.
SEA STATE: 4.0 to 5.0m reaching 6.0 to 6.5m in places in the west, 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: 24/05/16 AT 0500 UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE.).
PART 1: WARNING:
– GALE FORCE 8 RUNNING OVER WAM AND CRO LOCALLY STRONG GALE FORCE 9.
– GALE FORCE 8 EXPECTED OVER AMS AND KER LOCALLY STRONG GALE FORCE 9.
PART 2: GENERAL SYNOPSYS, 24/05/16 AT 0000 UTC:
– LOW 973 HPA AROUND 53S/39E, SHIFTING EASTWARD FAIRLY QUICKLY.
ASSOCIATED CF COLD FRONT AXIS 35S/36E, 36S/40E, 40S/44E, 44S/50E, 50S/52E.
– HIGH 1027 HPA FROM THE WEST OVER NORTHERN WAM.
PART 3: FORECAST FOR 24 HOURS FROM 16/05/24 AT 0600 UTC TO 17/05/24 AT 0600UTC:
WAM (30S/40S, 50E/65E):
RAIN OR FRONTAL SHOWERS, OCCASIONALLY STORMY WITH CF.
WIND: ANTICLOCKWISE 3 TO 5 OVER NORTHERN ZONE INCREASING SOUTH-NORTHWEST 6 TO 8, SOMETIMES 9, AHEAD OF CF BACKING WEST 4 TO 6 BEHIND CF OVERNIGHT. STRONG GUSTS.
SEA : MODERATE TO ROUGH BECOMING ROUGH TO VERY ROUGH. EAST SWELL 3 TO
4 M OVERNIGHT.
VISI: POOR TO VERY POOR UNDER PRECIPITATION.
AMS (30S/40S, 65E/80E):
FEW SHOWERS, THEN RAIN OR FRONTAL SHOWERS, SOMETIMES THUNDERY WITH CF AT THE END OF THE PERIOD.
WIND: SOUTHERLY 4 TO 6 INCREASING NW 6 TO 8 LOCALLY 9 AHEAD OF CF BACKING W 5 TO 7 BEHIND AT END OF TERM.
SEA: MODERATE TO ROUGH, LOCALLY VERY ROUGH, WITH AN EASTERLY SWELL OF
3 TO 5 M AT THE END OF THE PERIOD.
VISI: POOR TO VERY POOR UNDER PRECIPITATION.
CRO (40S/50S, 50E/65E):
RAIN OR FRONTAL SHOWERS, OCCASIONALLY STORMY WITH CF.
WIND : NW 5 TO 6, INCREASING VERY QUICKLY 7 TO 8 FROM THE WEST, SOMETIMES 9 TO THE NORTH BACKING TO W 6 TO 8 THEN INCREASING N 6/7 AHEAD OF A NEW FRONT AT THE END OF THE TERM. STRONG GUSTS.
SEA: ROUGH TO VERY ROUGH, CROSSED, WITH A STRONG WIND SEA. ARRIVAL OF A NEW SWELL 3 TO 5 M EASTERLY SWELL.
VISI: POOR TO VERY POOR UNDER PRECIPITATION.
KER (40S/50S, 65E/80E):
RAIN OR FRONTAL SHOWERS, OCCASIONALLY STORMY.
WIND: NW 5 TO 6, OCCASIONALLY 7 INCREASING N 7/8 LOCALLY 9 AHEAD OF CF BACKING W 5 TO 7 BEHIND OVERNIGHT. STRONG GUSTS.
SEA: MODERATE TO ROUGH, LOCALLY VERY ROUGH. EAST SWELL 2 TO 4 M OVERNIGHT.
VISI: POOR TO VERY POOR UNDER PRECIPITATION.
ENDS DE CAPE TOWN RADIO/ZSC+
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