WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
13TH OF DECEMBER 2025 AT 17:00 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 132200 TO 142200 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 35 in the south and south-east, but S to SW 35 to 40 in the
south-west, drifting to the south towards the end of the period.
2. CAPE WEST: W to NW 35 in the extreme south-west, spreading to the south-
east towards mid-period.
3. CAPE EAST: W to NW 35 in the south-east at first, but in the south-west
towards mid-period.
4. MARION FORTIES EAST: W to NW 35 to 40 in the north-east at first but in
the south-west by mid-period, spreading to the east
by the end of the period.
SYNOPTIC CHART 12:00Z
=====================
High 1024 hPa 32s01e, High 1027 hPa 35s59e
Low 983 hPa 43s20w, Low 957 hPa 57s38e
1. Cold Front: 28s28w 35s19w 40s16w into 43s20w
2. Cold Front: 30s34e 35s38e 40s42e 45s46e 50s48e into 57s38e
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 05 to 15, but SW 05 to 10 in the east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : E to SE 10 to 20, but W to SW 05 to 15 in the south.
VIS : Good, but moderate in showers and rain in the south.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 10 to 20 reaching 25 in the south-east, spreading to the
north-east towards mid-period.
VIS : Good.
SEA STATE: 3.0 to 3.5m in the south-east, subsiding towards the end of the
period, with S to SW swell.
TRISTAN (30S/40S, 00E/20W):
WIND : NW 15 to 25 reaching 30 to 35 in the south and south-east, but S
to SW 15 to 25 in the west, reaching 30 to 40 in the south-west,
drifting to the south towards the end of the period.
VIS : Moderate in showers and rain in places, becoming good from the
west and south-west towards the end of the period.
SEA STATE: 3.0 to 4.0m in the south, reaching 5.0 to 6.0m in the south-west,
spreading to the south-east towards the end of the period, with W
to SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : Anticyclonic 05 to 15 in the north-west, otherwise W to NW 15 to
25 reaching 30 to 35 in the extreme south-west, spreading to the
south-east towards mid-period, but S to SE 15 to 25 in the north-
east.
VIS : Good, but moderate in showers and rain in places in the south.
SEA STATE: 3.0 to 3.5m in north-east and southern half, reaching 4.0 to 5.0m
in the south, with W to SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : Anticyclonic 05 to 15 in the north, otherwise W to NW 15 to 25
reaching 30 to 35 in the south-east at first, but in the south-
west towards mid-period, while becoming E to SE 05 to 15 in the
extreme west.
VIS : Good but moderate in showers and rain in the southern and eastern
parts.
SEA STATE: 3.0 to 4.0m reaching 5.0 to 6.0m in the south-western parts, with
W to SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : S to SE 15 to 25 in the central parts, reaching 30 in the north
and west, otherwise E to NE 10 to 20 reaching 25 in the south-
west towards the end of the period.
VIS : Good but moderate to poor in showers and thundershowers in the
west and north-west.
SEA STATE: 3.0 to 3.5m in the south and west, with S to SW swell, but
with E to NE swell in the north-west.
MOZAMBIQUE CHANNEL:
WIND : Variable 05 to 10 in the north, otherwise SE to E 05 to 15
reaching 20 to 25 in the extreme south-west, drifting to the
south-east towards the end of the period.
VIS : Moderate to poor in showers and thundershowers in places,
becoming good from the south towards the end of the period.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : E to SE 10 to 20, reaching 25 in the south-east until mid-period.
VIS : Moderate in showers and thundershowers in places.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to NW 20 to 30 reaching 35 to 40 in the north-east at first but
in the south-west by mid-period, spreading to the east by the end
of the period.
VIS : Moderate in showers and rain in places, but with possible snow-
showers in the south.
SEA STATE: 4.0 to 5.0m, reaching 5.5 to 6.5m in the south-west towards mid-
period, with W to SW swell.
AREA 2:
=======
MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK
(AMSTERDAM-CROZET-KERGUELEN)
25/12/13 AT 1700UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40%
STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
GALE EXPECTED OVER CRO.
PART 2: GENERAL SYNOPSIS, 25/12/13 AT 1200UTC
- COLD FRONT CF WEST OF CRO AND WAM, CROSSING ALL PART EXCEPT AMS.
- HIGH 1026 OVER WAM, SLOW-MOVING EASTWARD.
PART 3: FORECAST FOR 24 HOURS FROM 25/12/13 AT 1800UTC TO 25/12/14
AT 1800UTC
WAM (30S/40S, 50E/65E)
RAIN (CF) OVER SOUTH-WESTERN LATER.
WIND : ANTICLOCKWISE 3/5 INCREASING NW 6/7 OVER SOUTHERN.
SEA : MODERATE LOCALLY ROUGH OVER SOUTHERN.
VISI : GOOD BECOMING POOR FROM SOUTH-WEST.
AMS (30S/40S, 65E/80E)
SHOWERS OVER SOUTH-EASTERN AT FIRST.
WIND : BECOMING ANTICLOCKWISE 2/4.
SEA : ROUGH TO VERY ROUGH BECOMING MODERATE OVER WESTERN. SW SWELL 3
TO 5 M ABATING AT END.
VISI : GOOD BUT POOR IN SHOWERS.
CRO (40S/50S, 50E/65E)
RAIN (CF).
WIND : NW 6/7 LOCALLY 8 OVER NORTHERN, DECREASING W 5/6 LATER.
SEA : MODERATE TO ROUGH BECOMING ROUGH TO VERY ROUGH BY NW SWELL 3 TO
5 M AT END.
VISI : POOR TO VERY POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
SHOWERS OVER NORTH-EASTERN AT FIRST, RAIN (CF) OVER WESTERN AT END.
WIND : ANTICLOCKWISE 3/5 INCREASING NW 6/7 OVER WESTERN AT END.
SEA : MODERATE TO ROUGH LOCALLY TO VERY ROUGH OVER NORTH-EASTERN AT
FIRST AND BECOMING VERY ROUGH OVER WESTERN AT END. W SWELL 2 TO 4 M
ABATING.
VISI : POOR IN PRECIPITATION.=