WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
28TH OF DECEMBER 2025 AT 14:45 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 282200 TO 292200 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:
====================
NIL.
SYNOPTIC CHART 12:00Z
=====================
High 1016 hPa 34s15w, High 1018 hPa 39s21e, High 1025 hPa 43s47e
Low 1007 hPa 37s00e, Low 1005 hPa 26s54e
1. Cold Front: 25s10w 30s04w 35s01w into 37s00e
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : E to SE 05 to 15.
VIS : Good.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 05 to 15 but SW 05 to 10 in the east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : SE to E 05 to 15 in the extreme north, otherwise variable 05 to
10 but NW to W 10 to 20 in the south, reaching 25 in the south-
west towards mid-period.
VIS : Good but moderate in showers and rain in the south.
TRADES (15S/30S, 00E/WEST COAST):
WIND : Variable 05 to 10 in the south-west, otherwise S to SE 05 to 15
reaching 20 in the south-east towards the end of the period.
VIS : Good.
TRISTAN (30S/40S, 00E/20W):
WIND : Variable 05 to 10 in the east until mid-period, otherwise NW 10
to 20 reaching 25 in the south-west.
VIS : Good but moderate in showers and rain in the east, but in the
west by mid-period, spreading to the central parts towards the
end of the period.
SEA STATE: 3.0 to 3.5m in the south-east at first, but in the south-west
towards mid-period, with W to SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : Anticyclonic 05 to 15 in the central parts, otherwise S to SE 05
to 15 reaching 20 to 30 in the east, but cyclonic 20 to 30 in the
south-west, drifting to the extreme south towards the end of the
period.
VIS : Good, but moderate to poor in showers and rain in the south-west,
drifting to the south towards the end of the period.
SEA STATE: 3.0 to 3.5m in the south-west until mid-period, with NW to W
swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : Anticyclonic 05 to 15 in the central parts, otherwise E to SE 10
to 20 but NE 10 to 20 in the north-west where it will reach 25 to
30 towards the end of the period.
VIS : Good but moderate in showers and rain in the east and south-east.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : SE to E 10 to 20 reaching 25 in the north from mid-period, but NE
10 to 20 in the west, reaching 25 to 30 in the south-west towards
the end of the period.
VIS : Moderate in showers and thundershowers in places, becoming good
from the south-west towards mid-period.
SEA STATE: 3.0m in the south-east towards the end of the period, mainly SE
swell.
MOZAMBIQUE CHANNEL:
WIND : N to NW 10 to 20 in the north, otherwise S to SE 10 to 20
reaching 25 in places in the central parts, spreading over the
southern parts towards the end of the period.
VIS : Good, but moderate to poor in showers and thundershowers in the
northern parts.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : N to NW 10 to 20, but S to SE 05 to 15 in the south.
VIS : Moderate to poor in showers and thundershowers in places.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : Variable 05 to 10 in the east at first, otherwise N to NW 10 to
20, becoming W to SW 10 to 20 in the west towards mid-period.
VIS : Good, but moderate in showers and rain in the west, drifting to
the east by the end of the period.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK
(AMSTERDAM-CROZET-KERGUELEN)
25/12/28 AT 1400UTC
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, 25/12/28 AT 1200UTC
- HIGH 1030 HPA NEAR 35S/91E, MOVING EASTWARD SLOWLY.
- HIGH 1026 HPA NEAR 44S/46E EXPECTED OVER CRO SOON AND OVER KER AT
END.
- BETWEEN THESE TWO CELLS: WAVING FRONT WITH LOW 1004 HPA NEAR
31S/61E WITH ASSOCIATED CONVERGENCE LINE.
PART 3: FORECAST FOR 24 HOURS FROM 25/12/28 AT 1800UTC TO 25/12/29
AT 1800UTC
WAM (30S/40S, 50E/65E)
SHOWERS AND SQUALLS OVER EASTERN AREA.
WIND : CLOCKWISE 4 TO 6 LOCALLY 7 OVER EASTERN AREA BACKING SE 4 TO 6
ELSEWHERE. GUSTS.
SEA : MODERATE OR ROUGH. VARIABLE SWELL 2 M.
VISI : POOR OR VERY POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
SHOWERS AND THUNDERSQUALLS OVER WESTERN AND SOUTHERN AREA MOVING
EASTWARD..
WIND : NORTHERLY 4 TO 6 AHEAD THE FRONT BACKING LATER SE 6/7 IN
SOUTHWEST. GUSTS.
SEA : MODERATE TO ROUGH.
VISI : POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
SCATTERED SHOWERS.
WIND : SW 5/6 OVER SOUTHERN AND BECOMING ANTICLOCKWISE 3 TO 5 BY
WESTERN AREA SOON.
SEA : ROUGH, LOCALLY VERY ROUGH OVER SOUTHEASTERN AT FIRST BECOMING
MODERATE BY WESTERN AREA SOON. SW SWELL 2 TO 3 M.
VISI : POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
SHOWERS OR THUNDERSQUALLS.
WIND : NW 6 TO 7 OVER EASTERN BACKING WESTERLY 6/7 IN SOUTH AND
ANTICLOCKWISE 3 TO 5 IN NORTH. GUSTS.
SEA : ROUGH TO VERY ROUGH. NORTH-WEST THEN WEST SWELL 3 TO 4 M.
VISI : POOR OR VERY POOR IN PRECIPITATION.=