WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
1ST OF AUGUST 2025 AT 15:30 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 012200 to 022200 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. TRISTAN: NW to N 35 in the east at first and SW to W 35 to 40 in the
south-west and central parts in the first half of the period
spreading to the south-east in the second half of the period.
2. CAPE WEST: NW to N 35 in the south-west.
3. CAPE EAST: N to NW 35 in the extreme east at first and SW to S 35 to 40
in the central-south and south-east.
4. MARION FORTIES EAST: SW to W 35 to 45 in the central and north-eastern
parts during the first half of the period.
SYNOPTIC CHART 12:00Z
=====================
High 1034 hPa 36s17e
Low 980 hPa 51s04w, Low 994 hPa 45s39e
1. Cold Front: 25s14w 30s11w 35s10w 40s07w 45s02w into 51s04w.
2. Cold Front: 30s38e 35s40e 40s42e 45s43e into 45s39e.
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : E to SE 05 to 15 reaching 20 at first.
VIS : Good.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 05 to 15, but W to NW 05 to 10 in the east.
VIS : Good.
SEA STATE: 3.0m in the south subsiding in the second half of the period,
with S swell.
ST HELENA (15S/30S, 00E/20W):
WIND : E to SE 05 to 15 in the north-east, but N to NW 15 to 25 in the
south-east, otherwise SW to S 15 to 25 reaching 30 in the south
towards the end of the period.
VIS : Good, but moderate in rain and showers in the south.
SEA STATE: 3.0m in the extreme north-east, with S to SE swell. 3.5 to 4.5m
in the south-west spreading to the south-east from mid-period,
with W to SW swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : SE to E 10 to 20 becoming NW to N 10 to 20 in the south-west
spreading to the south-east in the second half of the period
while reaching 25 in the south-west.
VIS : Good.
SEA STATE: 3.0 to 3.5m, reaching 4.0m in the south-east at first, with S to
SW swell.
TRISTAN (30S/40S, 00E/20W):
WIND : NW to N 25 to 35 in the east at first, otherwise SW to W 20 to 30
reaching 35 to 40 in the south-west and central parts in the
first half of the period spreading to the south-east in the
second half of the period.
VIS : Moderate to poor in showers and rain with possible snow showers
in the south from mid-period.
SEA STATE: 3.5 to 4.5m in the north-east, otherwise 4.5 to 5.5m reaching 6.0
to 7.0m in the south from mid-period, with SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : E to NE 10 to 20 in the east reaching 25 in the south-east from
mid-period, otherwise NW to N 15 to 25 reaching 30 to 35 in the
south-west.
VIS : Good, but moderate to poor in showers and rain in the west
towards mid-period.
SEA STATE: 3.0 to 3.5m in the east, but 3.5 to 4.5m in the west reaching 5.0
to 5.5m in the south-west, with SW swell, but NW in the west.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : N to NW 25 to 35 in the extreme east at first, otherwise SW to S
20 to 30 reaching 35 to 40 in the central-south and south-east,
but anticyclonic 05 to 15 in the west drifting to the central
parts by mid-period. It will become NE 15 to 25 in the west
towards mid-period reaching 30 towards the end of the period.
VIS : Good, but moderate in showers and rain in the west but poor in
the extreme east at first.
SEA STATE: 3.0 to 4.0m in the north-east at first and in the west, otherwise
5.0 to 6.0m reaching 6.5 to 7.5m in the central parts spreading
to the south-east towards the end of the period, with SW to S
swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : N to NE 15 to 25 in the east reaching 30 in the south-east,
otherwise SW to S 20 to 30 spreading the east towards the end of
the period. It will become NE 15 to 25 in the south-west from
mid-period.
VIS : Moderate to poor in rain and showers becoming good in the west
towards mid-period.
SEA STATE: 3.0 to 3.5m, but 4.5 to 5.5m in the west spreading to the central
parts towards mid-period reaching 6.0 to 6.5m in the south-west
drifting to the south-central parts in the second half of the
period, with E to NE swell in the east otherwise SW swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 15 to 25 reaching 30 in the south-west at first.
VIS : Moderate in rain and showers in places.
SEA STATE: 3.5 to 4.5m in the south-west spreading over the southern half
from mid-period, with SW to S swell.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : E to SE 05 to 15, reaching 20 to 25 in the north-west, but NE to
E 10 to 20 in the south. It will become SW 15 to 25 in the south-
west towards the end of the period.
VIS : Moderate in showers and rain in places, becoming good in the
north from mid-period.
SEA STATE: 3.0 to 3.5m in the north and east, with E to SE swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : NW 20 to 30 in the east at first, otherwise SW to W 20 to 30
reaching 35 to 45 in the central and north-eastern parts during
the first half of the period. It will become NW 20 to 30 in the
west from mid-period spreading to the south-east by the end of
the period.
VIS : Good, but moderate to poor in rain and showers with possible
snow-showers in the south until mid-period.
SEA STATE: 4.5 to 5.5m, reaching 6.0 to 7.0m in the north-west in the first
half of the period and in the north-east in the second half of
the period, with W to NW swell.
AREA 2:
=======
MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
25/08/01 AT 1400UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40%
STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALE FORCE 8 RUNNING OVER SOUTHERN CRO AND EXPECTED OVER SOUTHERN
KER AT THE END.
PART 2: GENERAL SYNOPSIS, 25/08/01 AT 1200UTC
-COLD FRONT WITH THUNDERY SQUALLS REACHING WESTERN WAM AND WESTERN
CRO AT FIRST AND MOVING EASTWARD.
- HIGH 1038 HPA NEAR 37S/66E, MOVING EASTWARD 10/15 KT.
PART 3: FORECAST FOR 24 HOURS FROM 25/08/01 AT 1800UTC TO 25/08/02
AT 1800UTC
WAM (30S/40S, 50E/65E)
FRONTAL SHOWERS BY WESTERN AREA. SQUALLS.
WIND : ANTICLOCKWISE 3 A 5, INCREASING NORTHERLY 5/6 LOCALLY 7 BY
WESTERN SOONAHEAD OF THE FRONT BACKING S 5/6 LOCALLY 7 BEHIND OVER
WESTERN AT THE END. GUSTS.
SEA : MODERATE TO ROUGH, BECOMING VERY ROUGH OVER SOUTH-WESTERN. SW
SWELL 2/4 M.
VISI : POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
WIND : ANTICLOCKWISE 3/5.
SEA : VERY ROUGH OVER EASTERN AREA, MODERATE TO ROUGH OVER WESTERN.
SW SWELL 4 TO 6 M ABATING.
VISI : GOOD.
CRO (40S/50S, 50E/65E)
FRONTALES SHOWERS OVER WESTERN MOVING EASTWARD.
WIND : INCREASING NW 6/7, LOCALLY 8 AHEAD THE FRONT BACKING S 6/7
BEHIND. GUSTS.
SEA : ROUGH TO VERY ROUGH, LOCALLY HIGH IN SOUTH. WESTERLY SWELL 2/4 M
IN NORTH, 3 TO 5 M IN SOUTH.
VISI : POOR TO VERY POOR WITH PRECIPITATION.
KER (40S/50S, 65E/80E)
FRONTAL SHOWERS OVER SOUTH-WESTERN AT THE END.
WIND : WESTERLY 5 TO 7 IN NORTH, 6 TO 8 IN SOUTH. GUSTS.
SEA : ROUGH TO VERY ROUGH, LOCALLY HIGH IN SOUTH. SOUTH-WESTERLY SWELL
3 TO 5 M.
VISI : POOR IN PRECIPITATION.