WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
15TH OF JUNE 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 152200 TO 162200 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:
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1. MARION FORTIES EAST: W to NW 35 in the south.
SYNOPTIC CHART 12:00Z
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High 1038 hPa 35s25w, High 1030 hPa 31s42e
Low 935 hPa 62s32e
1. Cold front: 29s04e 35s12e 40s20e 45s30e 50s39e into 62s32e
AREA FORECAST:
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ASCENSION (06S/15S, 00E/20W):
WIND : E to SE 05 to 15 reaching 20 in the west until mid-period.
VIS : Good, but moderate in showers in the extreme south-west.
SEA STATE: 3.0 to 3.5m in the south-west from mid-period, with S to SW
swell.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 05 to 15, but variable 05 to 10 in the east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : SE to E 05 to 15 reaching 20 to 30 in the south and south-
west.
VIS : Good, but moderate in showers and thundershowers in the west
and southern half.
SEA STATE: 3.5 to 4.5m but 3.0m in north and north-east at first, with S
to SW swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 05 to 15 reaching 20 to 25 in the west and south-west,
spreading eastwards towards mid-period.
VIS : Good, but moderate in showers and light rain in the south and
south-west.
SEA STATE: 3.0 to 4.0m in the south-west, spreading to the south and west
towards mid-period, while reaching 4.5m in the south-west,
with S to SW swell.
TRISTAN (30S/40S, 00E/20W):
WIND : SE 10 to 20 in the north, otherwise SW 10 to 20, but variable
05 to 10 in the west.
VIS : Good.
SEA STATE: 4.5 to 5.5m but 3.0 to 3.5m in the south-west, spreading to
the east towards the end of the period, with SW to S swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : Variable 05 to 10 in the north-east at first, otherwise W to
SW 10 to 20 reaching 25 to 30 in the south, but SE 10 to 20 in
the north.
VIS : Moderate in showers and rain in places, except in the north-
east, but in the north and west from mid-period.
SEA STATE: 4.5 to 5.5m in the south but 3.0 to 4.0m in the southern and
western halves, spreading to the north-eastern parts towards
the end of the period, with S to SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : NW 10 to 20 reaching 25 to 30 in the south and south-east, but
W to SW 10 to 20 in the west, spreading over the central parts
towards the end of the period.
VIS : Good, but moderate in showers and rain in the south-west,
spreading over the central and south-eastern parts towards the
end of the period.
SEA STATE: 3.0 to 4.0m in the south, but in the west towards mid-period,
spreading over the central parts towards the end of the
period, while reaching 4.5 to 5.0m in the south-west, with SW
swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : Anticyclonic 05 to 15 in the south-east until mid-period,
otherwise E to NE 10 to 20 reaching 25 to 30 in places in the
west. It will become S to SW 10 to 20 in the south-west by
mid-period.
VIS : Good, becoming moderate in showers and rain in the south
towards the end of the period.
MOZAMBIQUE CHANNEL:
WIND : N to NE 10 to 20 in the south-west, otherwise SE to E 10 to 20
reaching 25 to 30 in the north-east.
VIS : Good, but moderate in light rain and showers over the western
parts until mid-period.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : S to SE 10 to 20, reaching 25 to 30 in the north. It will
become N to NE 10 to 20 in the south from mid-period.
VIS : Moderate in rain and showers, but good in the south-east.
SEA STATE: 3.5 to 4.5m in the north, with S to SE swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to NW 20 to 30 reaching 35 in the south, becoming SW 20 to
30 in the south-west by mid-period.
VIS : Moderate in intermittent rain and showers in places, with
possible snow-showers in the south.
SEA STATE: 3.5 to 4.5m reaching 5.5 to 6.5m in the south, with W to SW
swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
2025/06/15 AT 0500UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- VIOLENT STORM FORCE 11 OVER AMS AND KER.
- STRONG GALE FORCE 9 OVER CRO.
PART 2: GENERAL SYNOPSIS, 25/06/15 AT 0000UTC
- LOW DEEPENING 988 NEAR 51S/59E THE 15 AT 00 UTC, MOVING RAPIDLY
NORTHEASTWARDS. EXPECTED 982 NEAR 39S/81E THE 16 AT 00 UTC.
- HIGH 1032 NEAR 32S/40E, MOVING SLOWLY EASTWARDS, EXPECTED AT END OVER
NORTHWESTERN WAM.
PART 3: FORECAST FOR 24 HOURS FROM 25/06/15 AT 0600UTC TO 25/06/16 AT 0600UTC
WAM (30S/40S, 50E/65E)
SCATTERED SHOWERS.
WIND: WEST OR SOUTHWEST 4 OR 5, BUT 6 OR 7 OVER SOUTHERN. ANTICLOCKWISE 3
TO 4 BY NORTH-WESTERN LATER. GUSTS.
SEA : ROUGH OR VERY ROUGH, LOCALLY HIGH IN SOUTHEAST AT BEGINNING. LONG
SW SWELL 3 TO 5 M.
VIS : POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
RAIN, SHOWERS AND THUNDERSQUALLS.
WIND: IN FAR NORTH: SOUTHWEST 5 TO 6.
ELSEWHERE: WESTERLY TO SOUTHWEST 7 TO 8, INCREASING 9 LATER BY
SOUTHERN, THEN BECOMING CLOCKWISE IN FAR SOUTHEAST AT NIGHT 10 TO
11. VIOLENT GUSTS.
SEA : VERY ROUGH TO HIGH, BECOMING VERY HIGH OVER SOUTH-EASTERN LATER.
LONG SW SWELL 5 TO 7 M.
VIS : VERY POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
RAIN OR SHOWERS.
WIND: SOUTH-WEST 8 TO 9 OVER EASTERN, WEST TO NORTH-WEST 6 TO 7
ELSEWHERE. AT NIGHT, WESTERLY 7 TO 8 ALL OVER THE AREA. SEVERE
GUSTS.
SEA : VERY ROUGH TO HIGH. LONG SW SWELL 3 TO 5 M, OCCASIONALLY 6 M OVER
NORTH-EASTERN.
VIS : POOR TO VERY POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
RAIN, SHOWERS AND THUNDERSQUALLS. LOCALLY SNOWY IN SOUTH.
WIND: SOUTHWEST 6 TO 7, INCREASING CLOCKWISE 9 TO 10, AT TIMES 11, FROM
NORTHWEST THEN NORTH. AT END, WESTERLY 7 TO 8 ALL OVER THE AREA.
SEVERE GUSTS.
SEA : VERY ROUGH TO HIGH, LOCALLY VERY HIGH OVER FAR NORTHERN. LONG
WESTERLY SWELL 5 OR 6 M.
VIS : POOR OR VERY POOR IN PRECIPITATION.