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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 27th 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 271000 TO 281000 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 SW 35 to 40 in the west reaching 45 to 50 in places
spreading to the central parts from mid-period, but N
to NW 35 to 40 in the south-east from mid-period.
2. MARION FORTIES EAST: N to NW 35 in the north-west spreading to
the south-east by mid-period while reaching 40 to
50 in the west by end of the period.
SYNOPTIC CHART 06:00Z
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High 1036 hPa 44s17w High 1040 hPa 35s63e.
Low 984 hPa 41s20e.
1. Cold Front: 33s17e 35s20e 37s23e 40s26e 34s24e into 41s20e.
AREA FORECAST:
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CAPE EAST (32.5S/40S, 20E/50E):
WIND : W to SW 30 to 40 in the west reaching 45 to 50 in places
spreading to the central parts from mid-period, otherwise N to
NW 20 to 30 reaching 35 to 40 in the south-east from mid-
period.
VIS : Good but moderate to poor in rain and showers in the west and
south spreading to the central parts from mid-period.
SEA STATE: 4.0 to 6.0m, except in the north-east for the first half of
the period, but 6.5 to 8.5m in the west spreading to the
central parts by mid-period reaching 9.0m to 10.0m in the
north-west, with SW to W swell but N to NW swell in the east.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : N to NE 15 to 25 reaching 30 in the west from mid-period,
becoming SW 20 to 30 in the extreme south-west from mid-
period.
VIS : Good.
SEA STATE: 3.0 to 4.0m in the west spreading to the central parts from
mid-period reaching 5.0 to 6.0m in the extreme south-west by
end of period, with SW swell.
MOZAMBIQUE CHANNEL:
WIND : N to NE 10 to 20 in the west reaching 25 to 30 in the south-
west, otherwise E to SE 05 to 10 reaching 15 to 20 in the
north.
VIS : Good.
MADAGASCAR EAST:
WIND : E to SE 15 to 25, but NE 15 to 25 in the south reaching 30 in
the extreme south-west.
VIS : Moderate in light showers.
SEA STATE: 3.0m in the north, with S to SE swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : N to NW 10 to 20 but 25 to 35 in the north-west spreading to
the south-east by mid-period while reaching 40 to 50 in the
west by end of the period.
VIS : Moderate to poor in showers and rain.
SEA STATE: 4.0 to 5.0m reaching 6.0 to 8.0m in the north and west towards
the end of the period, with 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: 24/08/27 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 RUNNING OVER KER AND EXPECTED OVER CRO.
PART 2: GENERAL SYNOPSYS, 24/08/27 AT 0000 UTC :
– HIGH 1037 NEAR 35S/64E, SLOW-MOVING AND BUILDING, EXPECTED 1040 NEAR 35S/66E AT END.
– WAVING FRONT (CF) OVER WESTERN CRO AT FIRST, MOVING SOUTH-WESTWARD 25/30KT, EXPECTED OVER SOUTHERN KER AT END.
– WARM FRONT (WF) OVER WESTERN CRO AT END, ASSOCIATED WITH A LOW EXPECTED 970 NEAR 47S/35E THE 28/08 AT 06UTC.
PART 3: FORECAST FOR 24 HOURS FROM 27/08/24 AT 0600 UTC TO 28/08/24 AT 0600UTC :
WAM (30S/40S,50E/65E) :
SHOWERS OVER FAR SOUTH-WESTERN, FEW SHOWERS ELSEWHERE.
WIND: ANTICLOCKWISE 3/5 IN EAST BUT N 5/7 WITH GUSTS IN WEST.
SEA: MODERATE TO ROUGH, VERY ROUGH OVER SOUTH-WESTERN. SW SWELL 2 TO 3M OVER SOUTHERN AREA.
VIS: MAINLY GOOD, LOCALLY POOR OVER FAR SOUTH-WESTERN IN PRECIPITATIONS.
AMS (30S/40S,65E/80E) :
FEW SHOWERS.
WIND: ANTICLOCKWISE 3/5, LOCALLY SW 5/6 WITH GUSTS IN FAR SOUTH-EAST.
SEA: MODERATE TO ROUGH, VERY ROUGH IN FAR SOUTH-EAST. S TO SW SWELL 2 TO 4M FROM NORTH-WEST TO SOUTH-EAST.
VIS: GOOD.
CRO (40S/50S,50E/65E) :
FRONTAL RAIN, SHOWERS AND SQUALLS WITH CF THEN WF
WIND: NW 5/7 WITH GUSTS, BUT VARIABLE 3/4 IN FAR SOUTH-WEST. INCREASING N TO NW 6/7 LOCALLY 8, AT END IN WEST. GUSTS.
SEA: ROUGH TO VERY ROUGH. W SWELL 2 TO 3M, THEN ARRIVAL OF A NW SWELL 3 TO 5M FROM WESTERN AREA AT FIRST.
VIS: POOR OR VERY POOR IN PRECIPITATIONS.
KER (40S/50S,65E/80E) :
FRONTAL RAIN AND SHOWERS WITH CF OVER SOUTHERN AREA.
WIND: SW 6/8 WITH GUSTS IN EAST BUT VARIABLE 3/4 IN WEST. SETTING-UP SOON NW 5/7 WITH GUSTS, IN WEST.
SEA: ROUGH TO VERY ROUGH, BUT VERY ROUGH TO HIGH OVER EASTERN AREA. SW SWELL 3 TO 5M FROM WEST TO EAST ABATING 2 TO 4M.
ARRIVAL OF A NW SWELL 3 A 4M OVER FAR WESTERN AT END.
VIS: POOR IN PRECIPITATIONS.
ENDS
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