WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
25TH OF MARCH 2025 AT 13:30 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:
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FORECAST VALID FROM 252200 TO 262200 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: Cyclonic 35 in the north.
SYNOPTIC CHART 12:00Z
=====================
High 1026 hPa 31s04w High 1026 hPa 40s48e.
Low 1005 hPa 38s24e.
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : SE to E 10 to 20.
VIS : Good.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 10 to 20 but SW 05 to 15 in the east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : SE to E 10 to 20 but N to NW 10 to 20 in the south-west.
VIS : Good but moderate to poor in showers and rain in the south-
west.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 10 to 20 reaching 25 to 30 in the east.
VIS : Good.
SEA STATE: 3.0m in the north-east, with S swell.
TRISTAN (30S/40S, 00E/20W):
WIND : Variable 05 in the north-east, otherwise N to NW 10 to 20
reaching 25 to 30 in the west. It will become SW 15 to 25 in
the extreme south-west at the end of the period.
VIS : Good but moderate to poor in rain and showers in the south and
west.
SEA STATE: 3.0 to 3.5m in the west from mid-period, with N to NW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : S to SW 15 to 25 in the south-east for the first half of the
period, otherwise S to SE 10 to 15 reaching 20 to 25 in the
north-east but variable 05 to 15 over the north-western and
central parts.
VIS : Moderate in light showers in the extreme south-east and
extreme south-west for the first half of the period, otherwise
good.
SEA STATE: 3.0 to 3.5m in the south-east for the first half of the
period, with S to SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : N to NW 15 to 25 over the eastern parts reaching 30 in the
south-east, otherwise W to SW 20 to 30.
VIS : Good in the north-east, otherwise moderate to poor in showers
and rain but moderate to poor in showers and thundershowers
over the central and south-eastern parts.
SEA STATE: 3.5 to 4.5m over the western and central parts, with SW
to W swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : N to NE 10 to 20 in the west, otherwise E to SE 10 to 20 but
become SW 15 to 25 in the south-west.
VIS : Good but moderate to poor in showers and thundershowers in the
south-west from mid-period.
MOZAMBIQUE CHANNEL:
WIND : S to SE 10 to 15 reaching 20 in the south-east but variable
05 over the central parts.
VIS : Good but moderate in isolated showers and thundershowers in
the extreme north.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : E to SE 10 to 20.
VIS : Moderate in showers and thundershowers.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : Cyclonic 15 to 25 reaching 30 to 35 in the north.
VIS : Moderate to poor in showers and thundershowers.
SEA STATE: 3.0m reaching 3.5 to 4.0m in the north, with SW swell but N to
NW swell in the north.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
25/03/25 AT 0600UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40%
STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- STRONG GALE FORCE 9 OVER NORTHERN KER AT FIRST.
PART 2: GENERAL SYNOPSIS, 25/03/25 AT 0000UTC
- COLD FRONT AXIS 33S/53E, 38S/64E, 44S/73E WITH LOW 993 HPA, MOVING
EASTWARD 30KT.
- HIGH 1027 HPA MOVING EASTWARD 30 KT EXPECTED OVER WAM AT END.
PART 3: FORECAST FOR 24 HOURS FROM 25/03/25 AT 0600UTC TO 25/03/26 AT
0600UTC
WAM (30S/40S, 50E/65E)
SHOWERS OVER NORTHEASTERN AREA, SCATTERED SHOWERS ELSEWHERE.
WIND : BECOMING ANTICLOCKWISE 3 TO 5 INCREASING LOCALLY SE 6 OVER
NORTHERN. GUSTS.
SEA : MODERATE TO ROUGH, LOCALLY VERY ROUGH OVER SOUTHEASTERN AT
FIRST. SW SWELL 2 TO 4 M.
VIS : POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
RAIN AND FRONTAL SHOWERS WITH CF AT THE END OF THE PERIOD.
WIND : NW 4 TO 6 AHEAD THE FRONT, BACKING S 4 TO 6 BEHIND. LATER,
ANTICLOCKWISE 2 TO 4 IN SOUTH, SE 4 TO 6 OVER NORTHERN AREA.
SEA : MODERATE TO ROUGH, VERY ROUGH OVER FAR SOUTHERN ZONE. SW SWELL
2 TO 4 M OVER SOUTHERN ZONE.
VIS : POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
SCATTERED SHOWERS.
WIND : W 5/6 DECREASING W 3 TO 5 LATER. GUSTS.
SEA : ROUGH TO VERY ROUGH. SW SWELL 2 TO 4 M ABATING OVER
NORTHWESTERN AT END.
VIS : MODERATE.
KER (40S/50S, 65E/80E)
FRONTAL SHOWERS OVER EASTERN AREA.
WIND : NE 6/7 OVER FAR EASTERN, BACKING SW THEN W 5/6, LOCALLY 8/9
OVER NORTHERN AT FIRST. GUSTS.
SEA : OFTEN VERY ROUGH. SW SWELL 2 TO 4 M.
VIS : POOR IN PRECIPITATION.=