SECURITE
IOR
WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII, EAST OF 20E.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE 17th 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 171000 TO 181000 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 in the west by mid-period.
2. MARION FORTIES EAST: N to NW 35 in the extreme south-west spreading
towards the south-east by the end of the period.
SYNOPTIC CHART 06:00Z
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High 1024 hPa 25s09w High 1028 hPa 30s48e.
Low 1012 hPa 34s29e Low 970 hPa 54s23e Low 956 hPa 60s13e.
Cold Front: 31s11e 35s15e 40s19e 45s22e 50s25e into 54s23e into 60s13e.
AREA FORECAST:
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CAPE EAST (32.5S/40S, 20E/50E):
WIND : S to SW 10 to 20 in the extreme south-east, otherwise N to
NW 15 to 25 reaching 35 in the west by mid-period.
VIS : Good, but moderate in showers and rain in the south.
SEA STATE: 3.5 to 4.5m, reaching 5.0 to 6.0m in the extreme south-west,
SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : Anti-cyclonic 05 in the east, otherwise N to NW 15 to 25 but
E to NE 10 to 20. It will become SW 10 to 20 in the extreme
south-west by the end of the period.
VIS : Good, but moderate in showers in the extreme east.
SEA STATE: 3.5 to 4.5m, SW swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 10 to 20.
VIS : Good, but moderate in showers in the extreme north.
SEA STATE: 3.0 to 3.5m in the south-east, SW swell.
MADAGASCAR EAST:
WIND : E to SE 15 to 25.
VIS : Moderate in showers in places.
SEA STATE: 3.0 to 4.0m, SW swell but SE swell in the north.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : N to NW 20 to 30 reaching 35 in the extreme south-west
spreading towards the south-east by the end of the period.
VIS : Good, but moderate to poor in showers and rain in the south-
west spreading towards the south-east by the end of the
period.
SEA STATE: 3.0 to 4.0m, W to SW swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK
AMSTERDAM-CROZET-KERGUELEN)
DATE: 24/08/17 AT 0500UTC
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 SYNOPSYS, 24/08/17 AT 0000 UTC:
-COLD FRONT AXIS 30S/66E ,35S/73E, 38S/80E, MOVING OVER NORTHEAST AMS.
– LOW 1012 HPA NEAR 41S/46E, MOVING OVER SOUTH WAM.
– ANTICLOCKWISE OVER NORTH CRO.
PART 3: FORECAST FOR 24 HOURS FROM 17/08/24 AT 0600 UTC TO 18/08/24 AT 0600UTC:
WAM (30S/40S, 50E/65E):
SHOWERS AND LOCALLY THUNDERY SQUALLS OVER SOUTHERN PART.
WIND : WESTERLY 4 TO 6 BECOMING CLOCKWISE 5 TO 7 OVER SOUTHERN PART, BACKING SW 3 A 5 OVER NORTHERN. GUSTS ON SQUALLS.
SEA: VERY ROUGH TO HIGH BECOMING ROUGH. LONG SOUTH-WEST SWELL 5 TO 7 M, DECREASING 3/4 M AT END.
VISI: POOR TO VERY POOR WITH PRECIPITATION.
AMS (30S/40S, 65E/80E):
RAIN AND FRONTAL SHOWERS OVER NORTHEASTERN PART. SHOWERS AND LOCALLY THUNDERY SQUALLS OVER WESTERN PART AT END.
WIND : NORTHWEST 5/6 AHEAD FRONT, BACKING BEHIND WESTERLY 4/5 THEN SOUTHWEST 4/5 LATER. NORTHERLY 5 OVER WESTERN PART AT END. GUSTS ON SQUALLS.
SEA : VERY ROUGH TO HIGH. LONG SW SWELL 4 TO 6 M, LOCALLY 7 M OVER SOUTHWESTERN PART AT FIRST, BEHIND FRONT.
VISI: POOR TO VERY POOR WITH PRECIPITATION.
CRO (40S/50S, 50E/65E):
SHOWERS MAINLY OVER NORTHERN PART.
WIND : SW 5/6 BECOMNING ANTICLOCKWISE 3 TO 5 OVER NORTHERN PART. INCREASING N 6/7 OVER WESTERN PART LATER AHEAD NEW FRONT.
SEA: VERY ROUGH TO HIGH BECOMING ROUGH BY WEST. LONG SW SWELL 5 TO 7 M DECREASING 3/4 M AT END.
VISI: POOR TO VERY POOR WITH PRECIPITATION.
KER (40S/50S, 65E/80E):
SHOWERS, SNOW IN SOUTH.
WIND : WESTERLY 6/7 WITH GUSTS, THEN SW 5/6 AND BECOMING VARIABLE 3 TO 5 OVER NORTHWESTERN PART AT END.
SEA: VERY ROUGH TO HIGH THEN ROUGH TO VERY ROUGH. LONG WESTERLY SWELL 5 TO 7 M DECREASING 3 TO 5 M.
VISI: POOR TO VERY POOR WITH PRECIPITATION.
ENDS THIS IS CAPETOWNRADIO
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