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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 25th OF JULY 2024 AT 17:00 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 252200 TO 262200 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: NW 35 in the extreme west.
2. MARION FORTIES EAST: E to NE 35 over the central parts.
SYNOPTIC CHART 12:00Z
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High 1024 hPa 50s42e.
Low 1010 hPa 37s40e Low 976 hPa 49s06e
Cold Front: 30s04e 35s10e 40s12e 45s13e into 49s06e.
AREA FORECAST:
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CAPE EAST (32.5S/40S, 20E/50E):
WIND : S to SW 15 to 25 over the central parts, otherwise E to NE 20
to 30 but NW 25 to 35 in the extreme west.
VIS : Good over the central parts, otherwise moderate to poor in
showers and rain.
SEA STATE: 3.5 to 4.5m in south-west, reaching 5.0 to 6.0m in extreme
south-west, SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : N to NW 15 to 25, but S to SW 10 to 20 but N to NE 10 to 20
in the extreme west.
VIS : Moderate in showers and rain.
MOZAMBIQUE CHANNEL:
WIND : S to SE 10 to 15, becoming NE 10 to 20 in the extreme south-
west.
VIS : Good, but moderate in showers in the south.
MADAGASCAR EAST:
WIND : S to SE 10 to 20, but N to NE 10 to 20 in the south.
VIS : Moderate in showers and thundershowers in places.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : E to NE 10 to 20 reaching 30 to 35 over the central parts, but
S to SW 10 to 20 in the north-west. it will become N to NW 15
to 25 in the north-west by mid-period.
VIS : Good, but moderate in showers and rain in the north-west
spreading towards the east by the end of the period.
SEA STATE: 3.0 to 4.0m in the north-west spreading towards the central
parts by mid-period, SW swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK
(AMSTERDAM-CROZET-KERGUELEN)
DATE: 24/07/25 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, AMS, and KER.
PART 2: GENERAL SYNOPSYS, 24/07/25 at 1200 UTC :
– Low 996 hPa near 45S/73E, moving eastward.
– Thundery low 1010 hPa near 30S/46E, forecast 1008 hPa near 35S/54E at
end.
– High 1027 hPa near 51S/44E forecast 1028 hPa near 48S/52E at end with
associated ridge 1025 hPa axis 48S/52E, 30S/73E.
PART 3: FORECAST FOR 24 HOURS from 25/07/24 at 1800 UTC to 26/07/24 at 1800 UTC :
WAM (30S/40S,50E/65E) : Rain, showers and thundery squalls by north-western with the thundery low. Strong gusts with squalls.
WIND: Becoming clockwise 5/6 by northwestern and increasing 7/8 south of
the low later. Southwesterly 5/6 over far southeastern becoming
variable 3/5.
SEA : Rough to very rough from northwest to southeast, becoming rough. SW
swell 3/5m decreasing 2/3m later.
VISI: Poor in precipitations.
AMS (30S/40S,65E/80E) : Scattered showers, more frequent over far southern at start.
WIND: West 5/6 over northern, 7/8 over southern. becoming southwest 6/7
over southeastern later and anticlockwise 3/5 over northwestern.
SEA : Rough to very rough, locally high over Southern area. South-West \
swell 3 to 5m.
VISI: Poor in precipitations.
CRO (40S/50S,50E/65E) :Scattered showers.
WIND: Anticlockwise 3/5, temporary S 5/6 over eastern at start. Becoming
SW 5/6 over southeastern soon, locally 7 over far southeastern at
end.
SEA : rough to very rough, becoming moderate to rough by western soon.
Southerly swell 3 to 5 m abating.
VISI: Generally good.
KER (40S/50S,65E/80E) : Showers and squalls over northern leaving the area by eastern later. Scattered snow showers over southern.
WIND: Clockwise 5/6, locally 7/8 over far Northern. Becoming south
westerly 5/6 by southern soon and increasing 7/8 later.
SEA : Rough to very rough, locally high over far Northern. Westerly swell
3 to 5m.
VISI: Poor in precipitations.
ENDS DE CAPE TOWN RADIO/ZSC+
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