IOR
WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII EAST OF 20E.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE 07th OF AUGUST 2024 AT 16:40 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 072200 TO 082200 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. TRISTAN: W to SW 35 to 45 in the south spreading eastward. It will
become NW 35 to 40 in the north-west from mid-morning and
spreading to places in the central parts.
2. CAPE WEST: W to SW 35 to 45 in the extreme west from mid-morning
spreading eastward and reaching 50 in the extreme south.
3. CAPE EAST: N to NW 35 to 40 in the extreme west towards the end of
the period.
SYNOPTIC CHART 12:00Z
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Low 26s14e 1016 hPa
Low 47s18e 990 hPa
Low 42s11w 992 hPa
High 30s42e 1024 hPa
Cold Front 1: 35s15w, 40s07w into 42s11w (992 hPa).
Cold Front 2: 28s13w, 30s08w, 35s02e, 40s11e, 45s19e into 447s718e
(990 hPa).
AREA FORECAST:
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CAPE EAST (32.5S/40S, 20E/50E):
WIND : SW 10 to 20 in the south-east at first, otherwise N to NW 10
to 20 reaching 30 to 40 in the extreme west towards the end of
the period.
VIS : Good but moderate in showers and rain in the extreme west
spreading towards the central parts by the end of the period.
SEA STATE: 3.0 to 4.0m SW swell, but 5.0 to 6.0m NW swell in the extreme
west from midday.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : Anticyclonic 05 to 10 spreading eastward. It will become NE 20
to 30 in the extreme west towards the end of the period.
VIS : Good.
SEA STATE: 3.0 to 3.5m SW swell, except in the north-west.
MOZAMBIQUE CHANNEL:
WIND : S to SE 10 to 20, becoming E to NE 05 to 15 in the south-west.
VIS : Good.
SEA STATE: 3.0m SW swell in the extreme south-east.
MADAGASCAR EAST:
WIND : E to SE 05 to 15 reaching 20 to 25 in the north.
VIS : Good.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to NW 10 to 20 reaching 30 in places in the south. It will
become SW 20 to 30 in the extreme south-west from midday
spreading eastward.
VIS : Moderate in showers and rain in the west spreading eastward,
clearing in the south from midday.
SEA STATE: 4.0 to 5.0m W to SW swell reaching 5.5m in the extreme south-
east at first and subsiding in the north-west at the end of
the period.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
DATE: 24/08/07 AT 1700 UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE STRONGER THAN AVERAGES GIVEN HERE).
PART 1: WARNING :
– GALE FORCE 8 OVER CRO, WAM AND AMS
– STRONG GALE FORCE 9 OVER KER.
– STORM FORCE 10 OVER NORTHERN KER AND SOUTHERN AMS OVERNIGHT.
PART 2: GENERAL SYNOPSYS, 24/08/07 AT 1200 UTC :
– LOW 975 HPA NEAR 49S/71E FORECAST 975 HPA NEAR 46S/79E THE
08/08/2024 AT 12 UTC. ASSOCIATED COLD FRONT (CG) OVER EASTERN KER
LEAVING THE AREA SOON AND WAVING FRONT OVER FAR SOUTHERN KER.
– THUNDERY LOW 977 HPA NEAR 41S/69E, FORECAST 969 HPA NEAR 42S/79E
THE 08/08/2024 AT 00UTC.ASSOCIATED COLD FRONT (CH), AXIS 34S/67E,
37S/72E, 40S/72E QUICKLY MOVING EASTWARD WITH THE LOW.
– HIGH 1023 HPA NEAR 31S/41E, FORECAST 1026 HPA OVER NORTHERN WAM LATER.
PART 3: FORECAST FOR 24 HOURS FROM 07/08/24 AT 1800 UTC TO 08/08/24 AT 1800 UTC :
WAM (30S/40S,50E/65E) :SCATTERED SHOWERS.
WIND: SW 7/8 OVER SOUTHEASTERN HALF, DECREASING ANTICLOCKWISE 3/5 BY
NORTHWESTERN.
SEA : VERY ROUGH TO HIGH BECOMING HIGH BY WESTERN LATER. SW
SWELL 4/6 M DECREASING 3/4 M OVER WESTERN LATER.
VIS : MODERATE TO POOR.
AMS (30S/40S,65E/80E) :
RAINS SHOWERS AND THUNDERY SQUALLS WITH CH OVER SOUTHERN HALF.
WIND: WESTERLY 7/8, TEMPORARY CLOCKWISE 9/10 OVER FAR SOUTHERN AT NIGHT.
DECREASING SW 5/6 OVER NORTHWESTERN AT END.
SEA : VERY ROUGH TO HIGH. SW SWELL 5/7 M.
VIS : POOR TO VERY POOR.
CRO (40S/50S,50E/65E) :
SHOWERS AND SQUALLS OVER SOUTHEASTERN. SNOW SHOWERS OVER FAR SOUTHERN.
WIND: SW 7/8, DECREASING W 4/5 OVER WESTERN SOON, INCREASING NW 6/7 OVER
FAR
