AOR-E
WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII WEST OF 20E.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE 12TH OF OCTOBER 2024 AT 08:30 UTC.
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 121000 TO 131000 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. TRISTAN: W to SW 35 in the north-east during the first half of the
period.
SYNOPTIC CHART 06:00Z
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High 1027 hPa 30s30w, High 1031 hPa 32s58e, High
Low 1012 hPa 36s02w, Low 986 hPa 50s12e, Low 1002 hPa 48s48e
1. Cold Front: 30s00w 35s03e into 36s02w
2. Cold Front: 40s04e 45s09e into 50s12e
3. Cold Front: 35s41e 40s45e 45s52e into 48s48e
AREA FORECAST:
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ASCENSION (06S/15S, 00E/20W):
WIND : SE to E 10 to 20.
VIS : Good.
SEA STATE: 3.0 to 3.5m in the south-west, spreading to the south-east by
end of the period.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 10 to 20 but W to SW 05 to 10 in the east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : W to SW 15 to 20 in the south and south-east at first,
otherwise SE to S 15 to 25, becoming NE 10 to 15 in the
south-west from mid-period.
VIS : Good but moderate in showers in places in the north-west.
SEA STATE: 3.0 to 4.0m, spreading to the north-east during the first half
of the period, while reaching 4.5 to 5.5m in the south-east,
mainly SW swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : SW 15 to 20 in the south-west during the first half of the
period, otherwise S to SE 15 to 25, reaching 30 in the east by
end of the period.
VIS : Good, but very poor in fog in the extreme north-east,
spreading to the south-east towards end of the period.
SEA STATE: 4.5m to 5.5m in the extreme south-west at first otherwise 3.0
to 4.0m in the south-west during the first half of the period,
spreading to the north and east in the second half of the
period, with mainly SW swell.
TRISTAN (30S/40S, 00E/20W):
WIND : W to SW 10 to 20 but 25 to 35 in the north-east during the
first half of the period. It will become N to NW 15 to 25 in
the west and south-west from mid-period.
VIS : Good but moderate to poor in showers and thundershowers in the
north-east at first.
SEA STATE: 4.0 to 6.0m but 3.0 to 3.5m in the west, spreading to the east
while subsiding in the west towards the end of period, mainly
SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : S to SE 05 to 15 in the north-east, otherwise W to NW 15 to 25
becoming SW 10 to 20 in the west from mid-period, spreading to
the central parts towards end of period.
VIS : Good but moderate to poor in showers and rain over the western
half, spreading to the south-east by end of the period.
SEA STATE: 3.0 to 3.5m but 4.0 to 6.0m over the west and south-west,
spreading to the east during the second half of the period,
where it will moderate to 3.5 to 4.5 towards end of period,
mainly W to SW swell.
ENDS DE CAPE TOWN RADIO/ZSC+
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