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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 18TH 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 182200 TO 192200 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: Cyclonic 35 to 40 in the north-west until mid-period
becoming SE to S 35 to 40 in the central-northern parts in
the second half of the period.
2. DURBAN EAST: SW to S 35 in the south-west towards mid-period spreading
to the north-west by the end of the period.
3. MARION FORTIES EAST: W to SW 35 over the southern half until mid-
period.
SYNOPTIC CHART 12:00Z
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High 1038 hPa 40s09w
Low 1014 hPa 36s17e
Low 1010 hPa 34s35e
Low 962 hPa 55s36e
1. Cold Front: 32s15e 36s18e into 36s17e cont 39s25e 40s35e 43s40e 45s45e
48s50e 5 reaching 5.0 to 6.0m in the north-west and south-east
spreading to the northern-central parts from mid-period, with
SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : NE to N 15 to 25, but SW to S 10 to 20 in the south-west
reaching 25 to 35 towards mid-period spreading to the north-
west by the end of the period.
VIS : Good, but moderate to poor in showers and rain in the south-
west spreading to the north-west from mid-period.
SEA STATE: 3.0 to 4.0m in the south-west spreading to the north-west from
mid-period while reaching 5.0 to 6.0m, with SW swell.
MOZAMBIQUE CHANNEL (10S/25S, EAST COAST/WEST COAST):
WIND : SE to E 10 to 20 in the extreme north, otherwise NE to N 10 to
20 becoming NW to W 05 to 15 in the east from mid-period. It
will become S 15 to 25 in the extreme south-west by end of the
period.
VIS : Good, but moderate in showers and rain in the south-west by
the end of the period.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : N to NE 10 to 20 in the south reaching 25 in the south-west
towards mid-period, otherwise SE to E 15 to 25.
VIS : Good, but moderate in showers and rain in the north spreading
to the south-east by the end of the period.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to SW 15 to 25 reaching 30 to 35 over the southern half
until mid-period.
VIS : Good, but moderate to poor in showers and rain in the south-
west spreading to the north-east by the end of the period.
SEA STATE: 3.0 to 4.0m in the north-east at first, otherwise 4.5 to 5.5m
reaching 6.5 to 8.0m in the south until mid-period, with SW to
W swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
24/09/18 AT 1600UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
– GALE FORCE 8 EXPECTED OVER FAR SOUTHERN KER.
PART 2: GENERAL SYNOPSIS, 24/09/18 AT 1200UTC
— HIGH 1036 HPA NEAR 37S/89E, SLOW-MOVING.
– COLD FRONT (CF) AXIS 55S/98E, 45S/80E, 38S/69E, 31S/59E MOVING EASTWARD AT 10/15 KT.
– LOW 960 HPA NEAR 56S/41E ASSOCIATED WITH A COLD FRONT (CG) AXIS 63S/46E, 53S/61E, 40S/40E, 36S/22E MOVING EASTWARD AT 15/20 KT.
PART 3: FORECAST FOR 24 HOURS FROM 24/09/18 AT 1800UTC TO 24/09/19 AT 1800UTC
