WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
24TH OF SEPTEMBER 2026 AT 17:15 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:
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FORECAST VALID FROM 242200 TO 252200 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. MARION FORTIES EAST: W to NW 35 to 40 in the east, central and
southern parts, becoming SW 35 to 45 in the south
from mid-period, spreading to the south-east from
the evening.
SYNOPTIC CHART 12:00Z
=====================
High 1028 hPa 39s29e, High 1024 hPa 31s39e
Low 1020 hPa 28s08e, Low 959 hPa 59s18e
1. Cold Front: 31s22w 37s16w 41s08w 46s01w 50s08e 51s20e into 59s18e
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : E to SE 10 to 20 reaching 25 in the south-west.
VIS : Good but moderate in light rain in the south-west.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 10 to 20 but SW 05 to 10 in the east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : Variable 05 to 10 in the south, otherwise E to SE 10 to 20.
VIS : Good.
TRADES (15S/30S, 00E/WEST COAST):
WIND : Variable 05 to 10 in the central and south, becoming SW 10 to
20 from mid-period, otherwise S to SE 10 to 20, reaching 25 to
30 in the north-east at times.
VIS : Good but moderate in showers and thundershowers in places in
the south-east.
TRISTAN (30S/40S, 00E/20W):
WIND : N to NW 15 to 25 in the central and south-east until the
afternoon, otherwise anti-cyclonic 05 to 15.
VIS : Good but moderate in showers and rain in the west, central and
south-east.
SEA STATE: 3.0 to 4.0m in the west and southern parts, subsiding in the
west from mid-period, with W to SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : Variable 05 to 10 in the north, but W to NW 15 to 25 in the
south-west, otherwise S to SE 10 to 20 reaching 25 in the
north-west.
VIS : Good but moderate in showers and thundershowers in places in
the east and northern parts.
SEA STATE: 3.0 to 3.5m in the south-west spreading to the south from mid-
period, with S to SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : E to NE 15 to 25 in the north-west until mid-period, but W to
NW 15 to 25 in the south-east, otherwise anti-cyclonic 05
to 15.
VIS : Good but moderate in light showers and rain in the north-east
at first, becoming moderate in showers and thundershowers in
places over the west towards mid-period.
SEA STATE: 3.0 to 4.0m in the west and southern parts, spreading to the
east from the morning, while subsiding in the west, with SW
swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : Anti-cyclonic 05 to 15, becoming N to NE 15 to 25 in the west
and south-west but S to SE 15 to 25 in the north from the
morning.
VIS : Good.
SEA STATE: 3.0m in the south-east by the end of the period, with SW
swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 05 to 15, reaching 20 to 30 in the south-east.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : S to SE 05 to 15, reaching 20 to 30 in the north. It will
become E to NE 05 to 15 in the south from the afternoon.
VIS : Good but moderate in showers and thundershowers in the
north-east at first.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to NW 20 to 30, reaching 35 to 40 in the east, central and
southern parts, becoming SW 35 to 45 in the south from mid-
period, spreading to the south-east from the evening.
VIS : Good but moderate in rain and showers over the southern
parts.
SEA STATE: 4.0 to 5.0m reaching 6.0 to 7.0m in the in the southern parts,
but 7.5 to 8.0m in the south-east at first, as well as south
from mid-period, with W to SW swell.
AREA 2:
======
MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA
ACK (AMSTERDAM-CROZET-KERGUELEN)
26/09/24 AT 1700UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40%
STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALE FORCE 8 OVER CRO AND KER.
PART 2: GENERAL SYNOPSIS, 26/09/24 AT 1200UTC
- LOW 1007 HPA NEAR 39S/62, EXPECTED1003 HPA NEAR 45S/80E AT END.
ASSOCIATED COLD FRONT AXIS 36S/60E, 49S/73E MOVING RAPIDLY EASTWARD
.- HIGH 1034 HPA NEAR 37S/88E, MOVING EASTWARD.- HIGH 1024 HPA NEAR
30S/38E, EXPECTED 1026 HPA NEAR 32S/54E AT END.- FRONT ARRIVING SOON
OVERS SOUTH CRO.
PART 3: FORECAST FOR 24 HOURS FROM 26/09/24 AT 1800UTC TO 26/09/25
AT 1800UTC
WAM (30S/40S, 50E/65E)
SHOWERS OR SQUALLS.
WIND: SOUTHERLY 4/5, LOCALLY 6 IN THE SOUTHEAST AT
FIRST, SETTLING DURING THE DAY WESTERLY 4/6 OVER THE SOUTH AND
BECOMING VARIABLE ANTICLOCKWISE 2/4 IN THE NORTH. BUT NORTHWESTERLY 4 IN NORTHWEST AT FIRST
SEA: MODERATE TO ROUGH, BECOMING VERY ROUGH IN THE FAR SOUTH. SOUTHWEST SWELL 2 TO 4 METERS.
VISI: POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
RAIN AND FRONTAL SHOWERS, LOC SQUALLS. VIOLENT GUSTS AHEAD OF THE
FRONT.
WIND: NORTHERLY TO NORTHWEST 5/6 AHEAD THE FRONT, REACHING
LOCALLY 7 IN THE SOUTH, BACKING SOUTHWEST 5/6 BEHINDREACHING LOCALLY 7 IN THE SOUTH. DECREASING SOUTH 3/4 IN THE NORTHWEST AT THE END.
SEA: ROUGH, BECOMING MODERATE IN THE NORTH AND VERY ROUGH IN THE SOUTH. SOUTHWEST SWELL OF 2 TO 4 METERS BEHIND THE FRONT.
VISI: POOR TO VERY POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
RAIN AND FRONTAL SHOWERS, SNOW IN THE SOUTH. VIOLENT GUSTS IN
SOUTH.
WIND: SETTLING NORTH-WESTERLY 6/7, LOCALLY 8 FROM THE SOUTH WITH
THE FRONT, THEN INCREASING WESTERLY 7/8 AT END, BUT SOUTHERLY TO
SOUTHWESTERLY 4/5 OVER THE NORTH AT THE START.
SEA: VERY ROUGH TO HIGH. SOUTHWESTERLY SWELL 4 TO 6 M.
VISI: POOR TO VERY POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
RAIN AND FRONTAL SHOWERS, LOC SQUALL. SNOW IN THE SOUTH. VIOLENT
GUSTS AHEAD OF THE FRONT.
WIND: NORTHERN HALF: NORTHERLY TO NORTHWEST 7/8 AHEAD OF THE FRONT AND SOUTHERLY 5/6, LOCALLY 7 BEHIND, SETTLING LATER WESTERLY 6/7 IN WEST.SOUTHERN HALF: NORTHWESTERLY 7/8 AHEAD OF
THE FRONT, BACKING WESTERLY 6/7 BEHIND, BECOMING SOON TEMPORARILY
VARIABLE 2/4 AND INCREASING DURING THE DAY NORTHWESTERLY 6/7 BY
WEST.
SEA: VERY ROUGH, BUT HIGH IN THE SOUTHWEST. WESTERLY SWELL 2 TO
4 METERS AHEAD OF THE FRONT AND SOUTHWESTERLY SWELL 3 TO 5 METERS
BEHIND.
VISI: POOR TO VERY POOR IN PRECIPITATION.=