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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 10th OF AUGUST 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 101000 TO 111000 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. MARION FORTIES EAST: NW 35 to 45 in the central and north-western
parts spreading to the central parts by the end
of the period.
2. CAPE EAST: W to NW 35 to 45 in places in the west at first.
SYNOPTIC CHART 06:00Z
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High 21s08w 1022 hPa
High 32s63e 1028 hPa
Low 42s23e 978 hPa
Cold Front 1: 30s09w 35s15e 40s27e into 42s00e cont. 42s23e
AREA FORECAST:
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CAPE EAST (32.5S/40S, 20E/50E):
WIND : W to NW 15 to 25, reaching 35 to 45 in places in the west at
first, becoming SW 15 to 25 in the extreme west spreading to
the central parts by the end of the period.
VIS : Moderate to poor in showers and rain in places.
SEA STATE: 3.5 to 4.5m SW to W swell in the south-east at first,
otherwise 5.0 to 6.0m SW swell in the west, reaching 7.0 to
8.0m in places, but 9.0 to 10m in the extreme south-west.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : NE to N 10 to 20 in the east, otherwise NW 10 to 20 but
anticyclonic 05 to 15 in the south-west where it will become
NE 15 to 25 towards mid-period.
VIS : Good but moderate in showers places in the east.
SEA STATE: 3.0 to 4.0m in the extreme south-east, SW swell.
MOZAMBIQUE CHANNEL:
WIND : SW to S 10 in the extreme east, but SE to E 10 to 20 in the
north, otherwise NE 10 to 20 in the south-west.
VIS : Good, but moderate in the north.
MADAGASCAR EAST:
WIND : SE 10 to 20 in the north, otherwise E to NE 10 to 20.
VIS : Good, but moderate in showers in places.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : NW 20 to 30 reaching 35 to 45 in the central and north-western
parts spreading to the central parts by the end of the peiod.
VIS : Moderate to poor in showers and rain, but good in the south.
SEA STATE: 3.0 to 4.0m NE to N swell, but 4.5 to 5.5m NW to W swell in
the north-west, but 6.0 to 7.0m in the extreme north east, NW
swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK
(AMSTERDAM-CROZET-KERGUELEN)
DATE: 24/08/10 at 0500UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (Wind gusts may be about 40% stronger than the averages given here.).
PART 1: WARNING :
– Strong gale force 9 running over KER.
– Gale force 8 running over CRO.
PART 2: GENERAL SYNOPSYS, 24/08/10 at 0000 UTC :
– Low 991 near 48S/46E, moving eastward and deepening, expected 978 near
51S/57E the 11/08 at 00UTC. Associated warm front (WF) axis 50S/42E,
48S/53E, 44S/60E and cold front (CF) axis 48S/46E, 36S/44E, 28S/37E,
both moving eastward.
– High 1029 near 29S/64E, slow-moving.
PART 3: FORECAST FOR 24 HOURS from 10/08/24 at 0600 UTC to 11/08/24 at 0600UTC :
WAM (30S/40S,50E/65E) :Rain, showers and thundery squalls with CF over southern area. Scattered showers in north.
WIND: anticlockwise3/4 in far north-east, but NW 5/7 with gusts elsewhere
decreasing 4/6 later.
SEA : moderate to rough, locally very rough in far south. SW swell 2 to 3m.
VISI: poor or very poor in precipitations.
AMS (30S/40S,65E/80E) :Few showers, then rain and showers with CF over southern area later.
WIND: anticlockwise 3/5 in north, but W or NW 5/6 with gusts in south,
locally 7 in far south-east at first.
SEA : rough or very rough. Long SW swell 3 to 5 m, abating.
VISI: poor in precipitations.
CRO (40S/50S,50E/65E) :Frontal rain and showers with WF and CF (snow in south in the vicinity of WF), and thundery squalls with CF. Showers and thundery squalls behind CF.
WIND: N to NW 5/7 locally 8. Gusts. Backing gradually W to NW.
SEA : rough to very rough. W to SW swell 2 to 4 m.
VISI: poor or very poor in precipitations.
KER (40S/50S,65E/80E) :Showers in east at first. Frontal rain and showers with WF and CF (snow in south in the vicinity of WF), and thundery squalls with CF. Showers behind CF over western area at end.
WIND: SW 5 to 8 from west to east, locally 9 in far east at firts,
backing gradually NW then W from western area and decreasing 6/7
locally 8. Severe gusts.
SEA : very rough to high from west to east, becoming rough to very rough
from western area. W to SW swell 3 to 5 m, abating.
VISI: poor to very poor in precipitations.
ENDS THIS IS CAPE TOWN RADIO
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