IOR
WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII. EAST OF 20E.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE 18th 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 181000 TO 191000 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: W to NW 35 in the south-west in the first half of the
period.
2. MARION FORTIES EAST: W to NW 35 in places in the west-central, central
parts and in the south-east during the first
half of the period.
SYNOPTIC CHART 06:00Z
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-High 1024 hPa 26s05e
-High 1028 hPa 32s55e.
-Low 1000 hPa 36s08w
Cold Front: 29s30w 34s04w into 36s08w
AREA FORECAST:
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CAPE EAST (32.5S/40S, 20E/50E):
WIND : W to NW 15 to 25 reaching 30 to 35 in the south-west in the
first half of the period, becoming anti-cyclonic 05 to 15 over
the central parts towards the end of the period.
VIS : Moderate in showers and rain in places in the west during the
first half of the period and in the east during the second
half of the period, otherwise good.
SEA STATE: 3.5 to 4.5m, reaching 5.5 to 6.5m in the west but 7.0 to 8.0m
in the extreme south-west at first, W to SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : Anti-cyclonic 05 to 15 in the east, otherwise N to NE 10 to 20
reaching 25 in the north-central but cyclonic 05 to 15 in the
south-west. It will become SE 05 to 15 in the north-west
towards the end of the period.
VIS : Good.
SEA STATE: 3.0m, SW swell.
MOZAMBIQUE CHANNEL:
WIND : SW 05 to 15 in the central parts at first, otherwise E to SE
10 to 20, reaching 25 in the north-east.
VIS : Good, but moderate in showers in places in the north.
SEA STATE: 3.0m in the extreme south, S to SW swell.
MADAGASCAR EAST:
WIND : E to SE 15 to 25, but NE 10 to 20 in the extreme south-west.
VIS : Moderate in showers in places.
SEA STATE: 3.0 to 3.5m, SW swell but SE swell in the north.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to NW 15 to 25, reaching 30 to 35 in places in the west-
central, central parts and in the south-east during the first
half of the period.
VIS : Moderate to poor in showers and rain in places.
SEA STATE: 3.5 to 4.5m reaching 5.0 to 6.0m in the west W to NW swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK
AMSTERDAM-CROZET-KERGUELEN)
DATE: 24/08/18 AT 0500 UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE.).
PART 1: WARNING :
– GALE CONTINUING OVER CRO.
PART 2: GENERAL SYNOPSYS, 24/08/18 AT 0000 UTC :
-COLD FRONT CF AXIS 28S/67E , 32S/74E, 36S83E, MOVING SLOWLY EASTWARD.
– HIGH 1029 OVER NORTHWESTERN WAM AND 1025 HPA OVER NORTHWESTERN CRO, MOVING SLOWLY EASTWARD.
– SHALLOW LOW 1019 HPA NEAR 37S/61E OVER SOUTHEASTERN WAM, FILLING AND MOVING SLOWLY EAST-NORTHEASTWARD AND FILLING OVER WESTERN AMS.
– NEW COLD FRONT CG OVER CRO FROM WEST, AXIS 38S/45E, 41S/53E, 47S/
