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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 28TH OF SEPTEMBER 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 281000 TO 291000 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: N to NW 35 to 40 in the south-west but W to SW 30 to 40 in
the extreme south-west, spreading over the central parts by
end of period.
2. DURBAN EAST: S to SW 35 in the south-west towards end of period.
3. MARION FORTIES EAST: NE 35 to 40 in the west by mid-period, spreading
over the central parts by end of period.
SYNOPTIC CHART 06:00Z
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High 1031 hPa 39s14w, High 1015 hPa 54s30e
Low 973 hPa 46s16e, Low 995 hPa 47s44e
Low 1010 hPa 33s48e, Low 1009 hPa 41s58e
1. Cold Front: 30s04e 32s12e 36s17e 40s21e into 46s16e 2. Cold Front: 40s433 45s47e into 47s44e
AREA FORECAST:
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CAPE EAST (32.5S/40S, 20E/50E):
WIND : N to NE 15 to 25 in the north-west, and anticyclonic 05 to 15
in the east, otherwise N to NW 15 to 25 reaching 30 to 40 in
the south-west but W to SW 30 to 40 in the extreme south-west,
spreading over the central parts by end of period.
VIS : Moderate to poor in showers and rain in the south and west,
spreading over the central parts towards end of period.
SEA STATE: 3.0m in places, reaching 4.0 to 6.0m in the south-west,
spreading over the western half by end of period, with SW
swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : NW 15 to 25 in the east, otherwise N to NE 15 to 25 reaching
30 in the west but S to SW 15 to 25 over the central parts,
reaching 30 to 35 in the south-west towards end of period.
VIS : Good but moderate to poor in showers and thundershowers in the
east but in the south-west towards mid-period.
SEA STATE: 3.0 to 3.5m in places in the east and central parts during the
first half of the period, but 3.0 to 4.0m in the south-west
towards end of period, with S to SW swell.
MOZAMBIQUE CHANNEL:
WIND : SE 05 to 15 in the north and south-east, otherwise variable 05
to 10 but N to NE 05 to 15 in the west and south-west.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : N to NE 15 to 25 in the south, otherwise E to SE 10 to 20
reaching 25 in the north-west.
VIS : Moderate in showers and rain in places, clearing in the south-
west towards the end of the period.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : SE 25 to 35 in the south, otherwise W to NW 15 to 25 reaching
30 in the east but NE 15 to 25 in the south-east, reaching 30
to 40 in the west by mid-period, spreading over the central
parts by end of period.
VIS : Good but moderate to poor in rain and snow-showers in the
south-east but in the west towards mid-period, spreading over
the central parts by end of period.
SEA STATE: 3.0 to 4.0m in the south during the first half of the period,
while reaching 4.5 to 5.5m in west, spreading over the central
parts by end of period, with N to NE swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
24/09/28 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 FAR SOUTH-EASTERN KER.
LOCALLY GALE FORCE 8 EXPECTED OVER CRO.
PART 2: GENERAL SYNOPSIS, 24/09/28 AT 0000UTC
WAVING FRONT (CF) OVER NORTHERN KER.
LOW 996 HPA NEAR 48S/43E WITH ASSOCIATED COLD FRONT (CG), MOVING EASTWARD, EXPECTED SOON OVER SOUTH-WESTERN CRO.
THUNDERY LOW 1006 HPA NEAR 32S/44E, MOVING EASTWARD AND FILLING; PRECEDED BY SQUALLS LINE.
HIGH 1031 HPA NEAR 33S/85E, MOVING SLOWLY EASTWARDS.
PART 3: FORECAST FOR 24 HOURS FROM 24/09/28 AT 0600UTC TO 24/09/29 AT 0600UTC
WAM (30S/40S, 50E/65E)
SHOWERS AND THUNDERY SQUALLS.
WIND: N TO NW 5/6 WITH GUSTS OVER NORTH-EASTERN AREA AHEAD OF SQUALL
LINE, VARIABLE 2/4 BEHIND, SETTING-UP LATER S 4/5 OVER FAR
SOUTHERN AREA. GUSTS WITH SQUALLS.
SEA : ROUGH, LOCALLY VERY ROUGH OVER FAR SOUTH-EASTERN AT FIRST. SW SWELL
2/4M.
VIS : POOR OR VERY POOR IN PRECIPITATIONS.
AMS (30S/40S, 65E/80E)
SHOWERS AND SQUALLS OVER SOUTH-WESTERN AREA, SCATTERED ELSEWHERE.
WIND: N TO NW 4/6 FROM NORTH TO SOUTH, LOCALLY 7 OVER FAR SOUTH-EASTERN
LATER. GUSTS IN SOUTH.
SEA : ROUGH, LOCALLY VERY ROUGH OVER FAR SOUTHERN AREA. SW SWELL 2/4M.
VIS : POOR OR VERY POOR IN PRECIPITATIONS.
CRO (40S/50S, 50E/65E)
RAIN AND SHOWERS IN NORTH, THEN SOON IN SOUTH WITH CG.
WIND: VARIABLE 3/5, BECOMING CLOCKWISE 4/6 AT FIRST FROM WESTERN,
INCREASING 6/7 LOCALLY 8 OVER EASTERN AREA AT END. GUSTS.
SEA : ROUGH TO VERY ROUGH, BECOMING MODERATE IN SOUTH-WEST AT END. SW
SWELL 3/5M ABATING.
VIS : POOR OR VERY POOR IN PRECIPITATIONS.
KER (40S/50S, 65E/80E)
RAIN AND SHOWERS IN NORTH.
WIND: W TO NW 5/6 LOCALLY 7 NORTHERN OF CF, BUT W 5/7 LOCALLY 8 FROM
NORTH TO SOUTH SOUTHERN OF CF, BECOMING VARIABLE 3/5 IN FAR
SOUTHERN AREA LATER.
SEA : VERY ROUGH BUT HIGH OVER FAR SOUTHERN AREA, BECOMING ROUGH TO VERY
ROUGH. W TO SW SWELL 4/6M ABATING 3/4M.
VIS : POOR IN PRECIPITATIONS.
ENDS DE CAPE TOWN RADIO/ZSC
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