WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
09TH OF SEPTEMBER 2024 AT 13:30 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 092200 TO 102200 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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Nil.
SYNOPTIC CHART 06:00Z
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High 1043 hPa 42s03e
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 : SW to W 05 to 10 in the east, otherwise S to SE 10 to 20.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : NE 10 to 20 in the south-west, otherwise E to SE 10 to 20,
reaching 25 in the north.
VIS : Moderate in showers and rain, but good in the north-east.
TRADES (15S/30S, 00E/WEST COAST):
WIND : Variable 05 to 10 in the east, otherwise S to SE 15 to 25
reaching 30 in the south-east during the first half of the
period.
VIS : Good, but moderate in rain and showers in the south-west.
SEA STATE: 3.0m in east and central parts, reaching 3.5 to 4.5m in
the south-east during the first half of the period, with S to
SE swell.
TRISTAN (30S/40S, 00E/20W):
WIND : E to NE 10 to 20, becoming N to NW 20 to 25 in south-west by
mid-period.
VIS : Moderate in showers and rain in places.
CAPE WEST (30S/40S, 00E/20E):
WIND : SW 10 to 20 in the south-east during the first half of the
period, otherwise SE to E 15 to 25, reaching 30 in the north-
east at first.
VIS : Good but moderate in showers and rain in the west.
SEA STATE: 3.0 to 3.5m in the east, reaching 4.0 to 4.5m in the north-
east during the first half of the period, with S to SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : SE to E 15 to 25 in the south-west, otherwise S to SW 15 to 25
reaching 30 in the south during the second half of the period
and NE 15 to 25 in the north-west.
VIS : Moderate in showers and rain but good in the south-west.
SEA STATE: 3.0 to 3.5m, reaching 4.0 to 4.5m in the south by mid-period,
with W to SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : N to NW 05 to 15 in the north-east, otherwise S to SE 15 to
25, becoming NE 05 to 15 in the south-west by mid-period,
spreading to the north-west by the end of the period.
VIS : Moderate in showers and rain in places, clearing in the south
towards the end of the period.
SEA STATE: 3.0 to 4.0m in the west, moderating from the south-west, with
SW swell.
MOZAMBIQUE CHANNEL:
WIND : Variable 05 to 10 over the central parts, otherwise SE to E 05
to 15, reaching 20 to 25 in the north-east and in the south-
west by mid-period.
VIS : Good but moderate in showers and rain in the south.
SEA STATE: 3.0m in the south-west towards the end of the period, with
S to SW swell.
MADAGASCAR EAST:
WIND : N to NE 10 to 20 in the south, otherwise SE to E 10 to 20
reaching 25 in the north-west.
VIS : Good, but moderate in showers and rain over the northern half.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : SW 15 to 25 in the east at first, otherwise W to NW 15 to 25,
becoming SW 20 to 30 from the west by mid-period.
VIS : Moderate to poor in showers and rain but with possible snow
showers in the south.
SEA STATE: 3.0 to 4.0m, reaching 5.0 to 5.5m in the south-east at first,
with SW swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
DATE: 24/09/09 AT 0500UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE.).
PART 1: WARNING :
- GALE FORCE 8 OVER WAM, AMS, CRO AND KER.
- STRONG GALE FORCE 9 EXPECTED OVER KER.
PART 2: GENERAL SYNOPSYS, 24/09/09 AT 0000 UTC :
- CF WAVING COLD FRONT OVER WAM, CRO AND KER, AXIS 41S/40E, 42S/50E, 46S/65E,
50S/71E, 55S/73E MOVING EASTWARD.
- DISTURBED WESTERLY FLOW OVER THE WHOLE AREA, ATTENUATED BY HIGH PRESSURE OVER
WAM AND AMS.
PART 3: FORECAST FOR 24 HOURS FROM 09/09/24 AT 0600 UTC TO 10/09/24 AT 0600UTC :
WAM (30S/40S,50E/65E) :
RAIN AND FRONTAL SHOWERS WITH THE FRONT MOVING CF.
WIND: NW 4 TO 6, INCREASING 7 OR 8 WITH STRONG GUSTS NEAR THE FRONT,
LATER BECOMING ESTABLISHED BEHIND THE FRONT SW 5 TO 7 LOCALLY 8
WITH STRONG GUSTS OVER SOUTHERN AREA.
SEA : MODERATE TO ROUGH FROM NORTH TO SOUTH AND GRADUALLY BECOMING ROUGH
TO VERY ROUGH FROM NORTH TO SOUTH. SW SWELL, 2 TO 3 M, INCREASING
AT THE END 3 TO 5 M OVER SOUTH-WESTERN ZONE.
VIS : POOR TO VERY POOR UNDER PRECIPITATION.
AMS (30S/40S,65E/80E) :
RAIN AND FRONTAL SHOWERS IN THE SOUTH-WEST WITH CF OVERNIGHT.
WIND: NW 3 TO 5 INCREASING LATER NW 6 TO 7 THROUGH SW AREA, LOCALLY 8 WITH STRONG GUSTS OVER SW AREA NEAR FRONT AND BACKING LATE W TO SW 7 TO 8 WITH STRONG GUSTS OVER SW AREA.
SEA : MODERATE BECOMING HIGH TO VERY HIGH WITH CF. LONG SW SWELL 2 TO
3 M TEMPORARILY 3 TO 5 M WHEN PASSING FRONT.
VIS : POOR TO VERY POOR UNDER PRECIPITATION.
CRO (40S/50S,50E/65E) :
RAIN AND SHOWERS AHEAD OF CF THEN SHOWERS, RAIN AND SNOW BEHIND THE FRONT.
WIND: WEST TO NORTH-WEST 6 TO 7 LOCALLY 8 WITH VIOLENT GUSTS AHEAD OF CF
THEN LATER BECOMING SOUTH-WEST 7 TO 8 WITH STRONG GUSTS FROM THE
WEST ZONE BEHIND CF IN THE DAYTIME.
SEA : MODERATE TO ROUGH BECOMING ROUGH TO VERY ROUGH. SW SWELL 2 TO 3 M
STRENGTHENING OVERNIGHT 3 TO 5 M.
VIS : POOR TO VERY POOR UNDER PRECIPITATION.
KER (40S/50S,65E/80E) :
RAIN AND SHOWERS AT THE FRONT, THEN SHOWERS, RAIN AND SNOW BEHIND THE FRONT.
WIND: NORTHWESTERLY 6 TO 7 AHEAD OF THE FRONT, LOCALLY 8/9 WITH VIOLENT
GUSTS NEAR THE FRONT, THEN BECOMING WESTERLY 6 TO 8 BEHIND THE
FRONT.
SEA : MODERATE TO ROUGH BECOMING ROUGH TO VERY ROUGH BEHIND CF. W TO NW
SWELL, 3 TO 5 M.
VIS : POOR TO VERY POOR UNDER PRECIPITATION.