WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
31ST 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 312200 TO 012200 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: W to NW 35 in the south-west towards mid-period.
2. CAPE EAST: Cyclonic 35 in the north-west until towards the end of the
period.
3. DURBAN EAST: Cyclonic 35 in the south-west.
SYNOPTIC CHART 12:00Z
=====================
High 1020 hPa 26s04w, High 1022 hPa 44s33e
Low 954 hPa 57s11w
1. Cold Front: 30s12w 35s04w 40s02e 45s04e 50s07e into 57s11w
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 north, otherwise variable 05 to 10 but NW
to W 10 to 20 in the south-east at first.
VIS : Good but moderate in showers and rain in the south-west but in
the south until mid-period.
SEA STATE: 3.0 to 3.5m in the south-west, spreading to the south and west
toward mid-period, with SW swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : Anticyclonic 05 to 15 in the south-west, otherwise S to SE 10 to
20 reaching 25 in the south-east.
VIS : Good.
TRISTAN (30S/40S, 00E/20W):
WIND : Anticyclonic 05 to 15 in the north-east, otherwise W to NW 15 to
25 reaching 30 to 35 in the south-west towards mid-period.
VIS : Good, but moderate in showers and rain in the north-east, but in
the south-west towards mid-period.
SEA STATE: 3.0 to 4.0m reaching 4.5 to 5.0m in the south-west, with SW
swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : S to SE 10 to 20 in the north-east but anticyclonic 05 to 15 in
the north-west, otherwise W to SW 10 to 20 reaching 25 in the
east towards the end of the period, but NW 15 to 25 in the south-
west, drifting to the south-east towards the end of the period.
VIS : Good, but moderate to poor in showers and rain in the south-west,
drifting to the south-east towards the end of the period.
SEA STATE: 3.0 to 3.5m in the south-west by mid-period, with SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : Anticyclonic 05 to 15 in the eastern half but SE 10 to 20 in the
west, otherwise E to NE 10 to 20 but cyclonic 25 to 35 in the
north-west until towards the end of the period.
VIS : Good but poor to very poor in rain and thundershowers in the
north-west.
SEA STATE: 3.0 to 4.0m in the north-west, with E to NE swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : E to NE 10 to 20 reaching 25 to 30 in the west, but cyclonic 25
to 35 in the south-west.
VIS : Good, but moderate to poor in showers and thundershowers in the
west and south-west.
SEA STATE: 3.0 to 3.5m in the south-west, with E to NE swell.
MOZAMBIQUE CHANNEL:
WIND : N to NE 10 to 20 in the south-west, otherwise S to SE 10 to 20
but variable 05 to 10 in the north, spreading over the central
parts towards mid-period.
VIS : Good, but moderate to poor in showers and thundershowers in the
northern parts.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : Variable 05 to 10 in the north, otherwise S to SE 05 to 15,
becoming E to NE 05 to 10 in the south towards mid-period.
VIS : Good, but moderate to poor in showers and thundershowers in the
north and extreme west.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : Anticyclonic 05 to 10 in the north-west, otherwise SW 10 to 20
reaching 25 in the south-west.
VIS : Good.
SEA STATE: 3.0 to 4.0m in the south-east, with SW swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA
ACK (AMSTERDAM-CROZET-KERGUELEN)
25/12/31 AT 1600UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40%
STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALE RUNNING OVER WAM AND EXPECTED OVER AMS.
PART 2: GENERAL SYNOPSIS, 25/12/31 AT 1200UTC
- LOW 988 OVER 34S/62E, MOVING SOUTH-EASTWARD.
PART 3: FORECAST FOR 24 HOURS FROM 25/12/31 AT 1800UTC TO 26/01/01
AT 1800UTC
WAM (30S/40S, 50E/65E)
SHOWERS AND SQUALLS OVER SOUTH-EASTERN AT FIRST, SCATTERED RAIN OVER
SOUTHERN AT END.
WIND: CLOCKWISE 7/8 OVER FAR EASTERN AT FIRST, BECOMING ANTICLOCKWISE
3/5.
SEA: VERY ROUGH TO HIGH OVER EASTERN AT FIRST, BECOMING MODERATE FROM
WEST. SE SWELL 2 TO 4 M ABATING AT END. CROSS SEA OVER EASTERN.
VISI: POOR TO VERY POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
RAIN, SHOWERS AND SQUALLS OVER SOUTHERN AT FIRST.
WIND: CLOCKWISE 7/8 DECREASING W 4/5.
SEA: ROUGH, BECOMING VERY ROUGH TO HIGH. NW SWELL 3 TO 4 M.
VISI: POOR TO VERY POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
SCATTERED SHOWERS.
WIND: W 4/6 INCREASING SW 6/7 AT END.
SEA: SLIGHT TO MODERATE BECOMING ROUGH TO VERY ROUGH FROM SOUTH.
VISI: GOOD.
KER (40S/50S, 65E/80E)
RAIN, SHOWERS AND SQUALLS OVER NORTHERN.
WIND: WESTERLY 4/5 TEMPORARILY S 6/7 OVER NORTHERN.
SEA: MODERATE TO ROUGH.
VISI: GOOD BECOMING POOR TO VERY POOR OVER NORTHERN.