SECURITE
AOR-E
WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII WEST OF 20E.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE 11th 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 111000 TO 121000 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: NW 35 in the central and east and as well as the west towards
mid-period spreading to the east towards the end of the
period. It will become cyclonic 35 to 50 in the west by the
second half of the period.
2. CAPE WEST: NW to W 35 in places in the west spreading to the central
by mid-period.
SYNOPTIC CHART 06:00Z
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High 30s09e 1024 hPa
Low 55s22e 973 hPa
Low 46s26e 978 hPa
Cold Front 1: 38s22e 42s22e into 43s20e.
Cold Front 2: 38s40e 43s46e 48s51e into 48s45e
AREA FORECAST:
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ASCENSION (06S/15S, 00E/20W):
WIND : E to SE 10 to 20.
VIS : Good.
ANGOLA (06S/15S, 00E/00N):
WIND : SE 10 to 20, but S to SW 10 to 15 in the extreme east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : Anti-cyclonic 05 to 15, but NW 20 to 25 in the south-west
reaching 30 in the south-west.
VIS : Moderate in showers in the south-west, otherwise good.
SEA STATE: 3.5 to 4.5m in the south-west, NW to W swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : SE to S 15 to 25 but anticyclonic 10 to 15 in the extreme
south-west.
VIS : Good.
SEA STATE: 3.0m in the extreme south, SW swell.
TRISTAN (30S/40S, 00E/20W):
WIND : Variable 05 to 10 in the south-west in the first half of the
period, otherwise NW 20 to 30 reaching 35 in the central and
east and as well as the west towards mid-period spreading to
the towards the end of the period. It will become cyclonic 25
to 30 in the west by the second half of the period where it
will reach 35 to 50 in places in the west.
VIS : Good in the north-east, otherwise moderate in showers and
rain.
SEA STATE: 4.0 to 6.0m reaching 6.5 to 7.5m in the west by towards mid-
period, anticyclonic swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : SE to S 05 to 15 in the north-east, otherwise NW to W 15 to 25
reaching 35 in places in the west spreading to the central by
mid-period.
VIS : Good in places in the central, otherwise moderate to poor in
showers.
SEA STATE: 4.5 to 5.5m reaching 6.5 to 7.5m in the south-east in the
first half of the period, W to SW swell.
ENDS THIS IS CAPETOWNRADIO
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