WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
09TH OF DECEMBER 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 092200 TO 102200 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. CAPE EAST: S to SW 35 in the south, drifting to the south-east by the
end of the period.
2. MARION FORTIES EAST: W to SW 35 to 45 in the west and southern
parts, spreading to the northern parts from
tomorrow morning, as well as eastern parts tomorrow
afternoon.
SYNOPTIC CHART 12:00Z
=====================
High 1020 hPa 35s05e, High 1016 hPa 30s60e
Low 966 hPa 51s16w, Low 959 hPa 54s39e
1. Cold Front : 35s17w 40s08w 45s05w 50s04w 54s09w into 51s16w
2. Cold Front : 35s22e 39s35e 42s44e 47s55e 51s56e 54s49e 56s43e into 54s39e
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : SE to E 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, but moderate in showers and thundershowers in the extreme
north-east at first.
ST HELENA (15S/30S, 00E/20W):
WIND : NW 10 to 20 in the south-west, otherwise SE to E 10 to 20, but
anticyclonic 05 to 15 in the south-east.
VIS : Good, but moderate in showers and rain in the south-west.
TRADES (15S/30S, 00E/WEST COAST):
WIND : Variable 05 to 10 in the south-west, otherwise S to SE 10 to 20
reaching 25 to 30 in the south-east.
VIS : Good.
SEA STATE: 3.0m in the south-east at first, with S to SE swell.
TRISTAN (30S/40S, 00E/20W):
WIND : N to NW 15 to 25 in the east, otherwise W to SW 15 to 25 reaching
30 in the south by the end of the period.
VIS : Good in the west, otherwise moderate in showers and rain in
places.
SEA STATE: 3.0 to 4.0 in the west, and south, spreading to the central and
eastern parts from mid-period, but 4.0 to 5.0m in the south-west,
spreading to the south-east by the end of the period, with W to
SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : S to SE 15 to 25 in the east and north-east, reaching 30 in the
east at times, but N to NW 15 to 25 in the south and west,
otherwise, anti-cyclonic 05 to 15.
VIS : Good, but moderate in showers and thundershowers in the south-
west.
SEA STATE: 3.0 to 3.5m in the south-east at first, as well as south-
west by the end of the period, with SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : Anti-cyclonic 05 to 15 in the west, but NW 15 to 25 in the
eastern parts, otherwise S to SW 15 to 25, reaching 30 to 35 in
the south, drifting to the south-east by the end of the period.
VIS : Good, but moderate in showers and rain in the south and eastern
parts.
SEA STATE: 3.0 to 4.0m except in the north-east until mid-period, reaching
5.0 to 6.0m in the south spreading to the south-east from mid-
period, with SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : Anti-cyclonic 05 to 15, but S to SE 15 to 25 in the south-
west, spreading to the south and north-west from tomorrow
morning.
VIS : Good, but moderate to poor in showers and thundershowers in
in the west and southern parts, spreading to the east from mid-
period, while clearing in the south.
SEA STATE: 3.0 to 3.5m in the west and south-west, spreading to the central
south from mid-period, with SW swell.
MOZAMBIQUE CHANNEL:
WIND : Variable 05 to 10 in the north, but N to NE 10 to 20 in the
south-west at first, otherwise S to SE 05 to 15, reaching 25 to
30 in the south-west from mid-period.
VIS : Good, but moderate in showers and thundershowers in the Central
and northern parts at times.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : E to NE 05 to 15.
VIS : Moderate in showers and thundershowers in places.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to SW 20 to 30, reaching 35 to 45 in the west and southern
parts, spreading to the northern parts from tomorrow morning, as
well as eastern parts tomorrow afternoon.
VIS : Moderate in showers and rain in places, with possible snow-
showers in the southern parts.
SEA STATE: 5.0 to 6.0m, reaching 7.0 to 9.0m in the west and southern parts,
spreading to the north from mid-period, with SW swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
25/12/09 AT 0600UTC
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, 25/12/09 AT 0000UTC
- HIGH 1018 HPA OVER NORTHERN WAM AND AMS.
- WARM FRONT OVER SOUTHERN CRO AND COLD FRONT ARRIVING ON CRO SOON AND KER LATER.
PART 3: FORECAST FOR 24 HOURS FROM 25/12/09 AT 0600UTC TO 25/12/10 AT 0600UTC
WAM (30S/40S, 50E/65E)
SCATTERED SHOWERS OVER SOUTHERN AT END.
WIND : VARIABLE 3 TO 4 OVER NORTHERN, SETTING-UP WEST TO NORTH-WEST 4 TO 5
OVER SOUTHERN AND 5 TO 6 OVER FAR SOUTHERN.
SEA : SLIGHT TO ROUGH FROM NORTH TO SOUTH. SOUTH-WESTERLY SWELL 2 TO 3M
OVER SOUTHERN.
VIS : POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
SCATTERED SHOWERS.
WIND:
NORTHERN HALF: SOUTH-WESTERLY 3 TO 4 SETTING-UP ANTICLOCKWISE 3 TO 4 AT END.
SOUTHERN HALF: WEST 4 TO 5 LOCALLY 6 OVER FAR SOUTHERN.
SEA: MODERATE TO ROUGH. SOUTH-WESTERLY SWELL, 2 TO 3 M OVER SOUTHERN.
VIS: POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
FRONTAL SHOWERS.
WIND : WESTERLY TO NORTH-WEST 5 TO 6, LOCALLY 7 BUT VARIABLE 4 TO 5 OVER
SOUTHERN AT BEGINNING AND BETWEEN 42S AND 47S AT END.
SEA : ROUGH TO VERY ROUGH BECOMING HIGH OVER FAR SOUTH-WESTERN AT END .
WESTERLY SWELL 2 TO 4 M INCREASING 4 TO 6 M OVER FAR SOUTH-WESTERN.
VIS : POOR TO VERY POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
FRONTAL SHOWERS.
WIND : WESTERLY 5 TO 6 LOCALLY 7 AT FIRST BUT 3 TO 4 OVER SOUTH-WESTERN
MOVING OVER ALL SOUTHERN SOON. SETTING UP NORTH-WEST 5 TO 6 BY
WESTERN LATER.
SEA : ROUGH TO VERY ROUGH. WESTERLY SWELL 3 TO 4 M.
VIS : POOR TO VERY POOR UNDER PRECIPITATION.