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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 21ST OF OCTOBER 2024 AT 17:15 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 212200 TO 222200 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.
2. DURBAN EAST: E to SE 35 in the north but N to NE 35 to 40 in the
south-west during the first half of the period.
3. MARION FORTIES EAST: W to NW 35 to 40 in the south.
SYNOPTIC CHART 12:00Z
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High 1034 hPa 39s39e.
Low 1010 hPa 36s11w.
AREA FORECAST:
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CAPE EAST (32.5S/40S, 20E/50E):
WIND : Variable 05 to 10 in the south-east, otherwise SE to E 15 to
25 reaching 30 over the central parts but Cyclonic 30 to 40 in
the north-west. It will become NE 10 to 20 in the south-west
by mid-period.
VIS : Good in the north-east but in the west by mid-period,
otherwise moderate to poor in showers and rain but very poor
in the north-west.
SEA STATE: 3.0 to 4.0m in the south and western half, with SW swell,
reaching 4.5 to 5.5m in the north-west, with E swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : S to SW 10 to 15 in the extreme south-east at first but in the
extreme south-west by end of period, otherwise E to SE 15 to
25 reaching 30 to 35 in the north but N to NE 15 to 25 in the
north-west, reaching 30 to 40 in the south-west during the
first half of the period, where it will become SW 15 to 25.
VIS : Moderate to poor in showers and rain but very poor in the
south-west.
SEA STATE: 3.0 to 4.0m over the western and central parts, reaching 4.5m
in the extreme south-west during the first half of the period,
with SE to E swell.
MOZAMBIQUE CHANNEL:
WIND : SE to E 15 to 25, reaching 30 in the south-east, becoming
variable 05 to 10 over the central parts during the second
half of the period.
VIS : Good, but moderate to poor in showers and rain in the north
but in the south at first.
SEA STATE: 3.0 to 3.5m in the south-east, with SE to E swell.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : NE 20 to 30 in the south-west, otherwise SE to E 10 to 20
reaching 25 in the north-west.
VIS : Moderate to poor in showers and rain in places.
SEA STATE: 3.0 to 3.5m in the south-west, with SW swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : SW 10 to 20 in the north-east during the first half of the
period, otherwise W to NW 15 to 25 reaching 30 to 40 in the
south but variable 05 to 10 in the north.
VIS : Good, but moderate to poor in showers and rain in the south-
west, drifting to the south-east towards end of period.
SEA STATE: 3.0 to 4.0m, reaching 4.5 to 5.5m in the south-west by mid-
period, spreading to the south-east towards end of 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)
24/10/21 AT 1600UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
NIL
PART 2: GENERAL SYNOPSIS, 24/10/21 AT 1200UTC
– COLD FRONT 33S/50E, 36S/41E, 40S/77E, 45S/80E.
– HIGH 1034 NEAR 40S/38S WITH A RIDGE TOWARD EASTERN, SLOW-MOVING EASTWARD.
PART 3: FORECAST FOR 24 HOURS FROM 24/10/21 AT 1800UTC TO 24/10/22 AT 1800UTC
WAM (30S/40S, 50E/65E)
RAIN OR SHOWERS OVER EASTERN AT FIRST.
WIND: SOUTHERLY 4/5, LOCALLY 6 OVER FAR NORTHERN.
SEA : MODERATE BECOMING ROUGH. SW SWELL, 2 TO 3 M, INCREASING 3 TO 4 M OVER
SOUTHERN.
VIS : POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
FRONTAL RAIN AND SHOWERS.
WIND: NW 4/5 BACKING SOUTHERLY 4/5 LOCALLY 6 OVER NORTH-WESTERN.
SEA : MODERATE BECOMING ROUGH AT END. SW SWELL 2 TO 3 M OVER SOUTHERN.
VIS : POOR TO VERY POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
FEW SHOWERS.
WIND: W TO SW 4/6 INCREASING NW 7 OVER FAR SOUTH-WESTERN AT END.
SEA : ROUGH OR VERY ROUGH. SW SWELL 2 TO 4 M, LOCALLY 4 TO 5 M OVER SOUTHERN.
VIS : GOOD.
KER (40S/50S, 65E/80E)
FEW SHOWERS.
WIND: WESTERLY 4/6 INCREASING 5/7.
SEA : BECOMING VERY ROUGH. W SWELL 2 TO 4 M LOCALLY 4 TO 5 M OVER SOUTH-WESTERN
AT END.
VIS : POOR IN PRECIPITATION.
