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WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII: E OF 20E ISSUED BY THE
SOUTH AFRICAN WEATHER SERVICE ON THE 21st OF AUGUST 2024 AT 16:30 UTC.
FOR SOUTH-EAST SECTOR OF METAREA. VII, PREPARED BY REUNION, SEE AREA 2
BELOW.
NOTE: WX OBSERVATIONS.
======================
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 212200 TO 222200 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 east for the first half of the period and W to SW
35 to 40 over the central and eastern parts reaching 45 to 50 in the
south-east. It will NE to E 35 in the west towards the end of the period.
2. DURBAN EAST: S to SW 35 in the west for the first half of the period.
3. MARION FORTIES EAST: S to SE 35 to 40 over central parts but 45 to 50 in
the north.
SYNOPTIC CHART 12:00Z
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High 1032 hPa 38s09e High 1030 hPa 30s53e.
Low 996 hPa 40s29e Low 980 hPa 42s11w.
Cold Front 1: 33s27e 37s30e 39s32e into 40s29e.
Cold front 2: 26s35w 27s27w 29s18w 32s11w 37s07w 41s07w 44s10w into
42s11w.
AREA FORECAST:
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CAPE EAST (32.5S/40S, 20E/50E):
WIND : NW 25 to 35 in the east for the first half of the period,
otherwise W to SW 20 to 30 reaching 35 to 40 over the central
and eastern parts but 45 to 50 in the south-east. It will
become NE to E 20 to 30 in the west from mid-period reaching
35 towards the end of the period.
VIS : Moderate to poor in showers and rain, becoming good in the
west from mid-period.
SEA STATE: 4.0 to 6.0m reaching 7.0 to 9.0m over the central parts
spreading to the eastern parts by mid-period while reaching
10.0 to 11.0m over the south-eastern parts towards the end of
the period, with mainly W to SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : N to NW 15 to 25 but S to SW 20 to 30 in the west spreading to
the central parts by end of the period while reaching 35 in
the west for the first half of the period.
VIS : Good but moderate in showers and rain in the west.
SEA STATE: 4.0 to 5.0m in the west reaching 6.0 to 6.5m in the south-
west, with mainly SW swell.
MOZAMBIQUE CHANNEL:
WIND : SE to S 05 to 15 reaching 20 to 25 in the north at first but
20 to 30 in the south-west from mid-period.
VIS : Good, becoming moderate in showers and rain in the south-west
from mid-period.
SEA STATE: 3.0 to 4.0m in the south-west from mid-period, with SW swell.
MADAGASCAR EAST:
WIND : E to SE 15 to 25 but NE to E 10 to 20 in the south.
VIS : Good in the south, otherwise moderate in light showers.
SEA STATE: 3.0 to 3.5m in the north, with E to SE swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : S to SE 15 to 25 reaching 30 to 40 over central parts but 45
to 50 in the north.
VIS : Moderate to poor in showers and rain over the central and
northern parts, otherwise good.
SEA STATE: 3.0 to 4.0m in the south with W to SW swell, otherwise 4.0 to
6.0m with S swell, reaching 7.0 to 9.0m in the north but 10.0m
in the extreme north from mid-period.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK
(AMSTERDAM-CROZET-KERGUELEN)
DATE: 24/08/21 at 1700 UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (Wind gusts may be stronger than
averages given here).
PART 1: WARNING :
– Strong gale force 9 running over CRO and KER.
– Gale force 8 expected over far south-east AMS at end.
PART 2: GENERAL SYNOPSYS, 24/08/21 at 1200 UTC :
– High 1028 hPa near 30S/52E moving eastward 25/30 kt.
– Low 968 hPa near 53S/65E with cold front axis 39S/52E, 41S/60E, 44S/69E,
48S/72E, 51S/71E moving eastward 25/30 kt.
– Low 996 hPa near 40S/28E , forecast 986 hPa near 39S/48E at end.
PART 3: FORECAST FOR 24 HOURS from 21/08/24 at 1800 UTC to 22/08/24 at
1800 UTC :
WAM (30S/40S,50E/65E) :Showers over Southern area.
WIND: Anticlockwise 3 to 5 over Northern, increasing West to North-West 6
to 7 over Southern.
SEA : rough to very rough from northern to southern. SW swell 3 to 4 m.
VIS : poor in precipitation.
AMS (30S/40S,65E/80E) :Showers over Southern area.
WIND: W 4 to 6 in north increasing 6 to 7 locally 8 with gusts in south.
SEA : rough to very rough in north, very rough in south. SW
swell 3 to 4 m, 5 to 6 m in south.
VIS : poor in precipitation.
CRO (40S/50S,50E/65E) :Frontal showers and squalls over northern.
WIND: SW 7 to 8 , locally 9 at first, decreasing temporarily
variable 2 to 4, increasing clockwise 6 to 7 locally 8 by
north-western area later. Gusts.
SEA : very rough to high, very high over eastern part, then very
rough by western area later. W swell 5 to 7 m abating 3 to 5 at end.
VIS : Poor to very poor in precipitation.
KER (40S/50S,65E/80E) :Frontal showers and squalls.
WIND: W or SW 7 to 8 locally 9, decreasing variable 3 to 5
over western area at end. Gusts.
SEA : Rough to very rough, becoming very rough by western
area at first. W to SW swell 4 to 6 m.
VIS : Poor to very poor in precipitation.
ENDS DE CAPE TOWN RADIO/ZSC+
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