IOR
WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII EAST OF 20E.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE 27TH OF SEPTEMBER 2024 AT 08:30 UTC.
FOR SOUTH-EAST SECTOR OF METAREA. VII, PREPARED BY REUNION, SEE AREA 2 BELOW.
NOTE: WX OBSERVATIONS.
======================
COULD ALL VESSELS EXPERIENCING UNEXPECTED, SEVERE WX/SEA STATE PLEASE MAKE EVERY EFFORT TO REPORT THIS TO SAWS VIA CAPE TOWN RADIO.
AREA 1:
=======
FORECAST VALID FROM 271000 TO 281000 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:
====================
1. CAPE EAST: W to NW 35 to 40 in the south-west and west from mid-
period.
2. DURBAN EAST: S to SW 35 in the south-west at first.
3. MARION FORTIES EAST: cyclonic 35 in the west towards mid-period
reaching 40 in the south-west by mid-period
spreading to the south by the end of the period.
SYNOPTIC CHART 06:00Z
=====================
High 1025 hPa 28s19w, High 1032 hPa 33s79e
Low 1007 hPa 32s38e, Low 1003 hPa 42s02e, Low 1008 hPa 47s24e
1. Cold Front: 36s09w 37s02w into 42s02e.
AREA FORECAST:
==============
CAPE EAST (32.5S/40S, 20E/50E):
WIND : S to SE 10 to 20 in the eastern parts reaching 25 to 30 in the
north at first, otherwise W to NW 15 to 25 reaching 30 to 40
in the south-west and west from mid-period.
VIS : Moderate to poor in showers and rain in places, but moderate
to poor in showers and thundershowers in the north-east
clearing towards the end of the period.
SEA STATE: 3.0 to 4.0m in places reaching 4.5 to 5.0m in the extreme
south-west towards the end of the period, with SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : S to SW 15 to 25 reaching 30 to 35 in the south-west at first,
but N to NW 15 to 25 in the eastern parts. It will become N to
NE 10 to 20 in the south-west towards mid-period reaching 25
to 30 towards the end of the period.
VIS : Good but moderate to poor in showers and thundershowers except
in the western parts.
SEA STATE: 3.5 to 4.5m in places in the west subsiding towards the end of
the period, with S to SW swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 10 to 20 in the south, otherwise E to NE 05 to 15
reaching 25 in the extreme north-east.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : NE 15 to 25 in the south, otherwise SE to E 10 to 20 reaching
25 in the north-west.
VIS : Moderate to poor in showers and rain, except in the south-
west.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to SW 15 to 25, but S to SE in the north-east during the
first half of the period, becoming cyclonic 25 to 35 in
the west towards mid-period reaching 40 in the south-west by
mid-period spreading to the south by the end of the period.
VIS : Good but moderate to poor in rain and snow-showers in the west
Spreading to the south and eastern parts from mid-period.
SEA STATE: 3.0 to 4.0m, reaching 4.5m in the south-east at first and in
places in the south-west towards the end of the period, S to
SW swell becoming SE in the south-west from mid-period.
AREA 2:
=======
MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
24/09/27 AT 0400UTC
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, 24/09/27 AT 0000UTC
– LOW 972 NEAR 57S/61E, RAPIDLY MOVING EASTWARD. WAVING FRONT OVER CRO AND KER.
– SQUALLS LINE OVER NORTH-WESTERN WAM, MOVING EASTWARD.
– HIGH 1031 OVER AMS, SLOW-MOVING EASTWARD.
PART 3: FORECAST FOR 24 HOURS FROM 24/09/27 AT 0600UTC TO 24/09/28 AT 0600UTC
WAM (30S/40S, 50E/65E)
SHOWERS AND SQUALLS.
WIND: N TO NW 4 TO 6, LOCALLY 7 WITH SEVERE GUSTS OVER SOUTH-EASTERN AT
END BUT BECOMING GRADUALLY VARIABLE 2 TO 4 OVER WESTERN.
SEA : ROUGH BY LONG SW SWELL 2 TO 4 M FROM NORTH TO SOUTH.
VIS : VERY POOR IN SQUALLS.
AMS (30S/40S, 65E/80E)
SHOWERS AND SQUALLS OVER SOUTH-WESTERN AT END.
WIND: ANTICLOCKWISE 3 TO 5, INCREASING LATER N 6 OR 7 OVER SOUTH-WESTERN.
SEA : ROUGH, VERY ROUGH OVER FAR SOUTHERN. LONG SW SWELL 2 TO 4 M FROM
NORTH TO SOUTH.
VIS : GOOD BUT VERY POOR IN SQUALLS.
CRO (40S/50S, 50E/65E)
RAIN, SHOWERS AND SQUALLS OVER NORTHERN.
WIND: WESTERLY 6 TO 7 WITH SEVERE GUSTS, BECOMING GRADUALLY ANTICLOCKWISE
3 TO 5 BY WESTERN.
SEA : ROUGH TO VERY ROUGH OVER NORTHERN, VERY ROUGH TO HIGH OVER
SOUTHERN. LONG SW SWELL 3 TO 5 M, LOCALLY 5 TO 6 M IN SOUTHERN.
VIS : POOR IN PRECIPITATIONS.
KER (40S/50S, 65E/80E)
RAIN AND SHOWERS OVER NORTHERN.
WIND: WESTERLY 6 TO 7 WITH SEVERE GUSTS, DECREASING AT END BY WESTERN.
SEA : VERY ROUGH TO HIGH. LONG WSW SWELL, 4 TO 6 M.
VIS : POOR IN PRECIPITATION.
NNNN
