WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
12TH OF JUNE 2026 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 122200 TO 132200 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: W to SW 35 to 40 over the central parts spreading to the
east by mid-period, while moderating from the west.
2. MARION FORTIES EAST: NW 35 in the east, otherwise SW to W 35 to 40,
reaching 50 to 60 in the south-west, that will
spread to the south-east while becoming NW 40 to
50 in the south-east by mid-period, moderating to
35 in the east by end of period.
SYNOPTIC CHART 12:00Z
=====================
High 1035 hPa 38s13w, High 1032 hPa 32s75e
Low 983 hPa 48s34e, Low 1009 hPa 30s32e
1. Cold Front: 36s20e 41s29e 45s33e into 48s34e
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 10 to 20, but variable 05 to 10 in the east, where it
will become SW to W 05 to 15 by end of period.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : E to SE 10 to 20, but NE 15 to 25 in the south-west.
VIS : Good but moderate to poor in showers and thundershowers in the
south-west.
SEA STATE: 3.0m in the south-west, with E to NE swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 10 to 20, reaching 25 in the north and central parts.
VIS : Good.
SEA STATE: 3.0m in the northern parts.
TRISTAN (30S/40S, 00E/20W):
WIND : NE 15 to 25 in the north-west, otherwise anticyclonic 05
to 15 but NW 15 in the south-west and SW 10 to 20 in the
south-east as well as SE in the north.
VIS : Good.
SEA STATE: 3.0m in the south-east, and in the north-west, with SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : S to SW 15 to 25, but SE to E 05 to 15 in the north, becoming
anticyclonic in the west from mid-period.
VIS : Good, but moderate in showers and rain in the south-east.
SEA STATE: 3.0 to 4.0m, reaching 5.0 to 6.0m over the south-eastern
Parts at first, with W to SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : NW 15 to 25 reaching 30 in the east and but W to SW 30 to
40 over the central parts spreading to the east by
mid-period, while moderating to 15 to 25 from the west. It
will become E to SE 10 to 20 in the north-west by end of
period.
VIS : Good, but moderate to poor in showers and thundershowers in
the north-west, central and the east by mid-period.
SEA STATE: 3.0 to 4.0m, reaching 5.0 to 7.0m over the central and south-
eastern parts by mid-period, while becoming 4.0 to 5.0m in the
west, with SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : Cyclonic 15 to 25 in the south-east, but S to SW 10 to
20 reaching 25 in the south-west, otherwise N to NW 15
to 25, becoming SW to W 10 to 20 in the central and eastern
parts by mid-period. It will become S to SE 05 to 15 in the
west by end of the period.
VIS : Good, but moderate to poor in showers and thundershowers in
the east at first, but in the south-west by mid-period.
SEA STATE: 3.0m in the east and west, becoming 4.0 to 6.0m in the south-
West, with NE swell in the east at first and SW in the south-
west.
MOZAMBIQUE CHANNEL:
WIND : S 10 to 20, but N to NW 15 to 25 in the south-west until mid-
period.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : W to NW 05 to 15 in the extreme south, otherwise variable 05
to 10, but E to SE 05 to 15 in the north.
VIS : Moderate in showers and thundershowers in places.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : NW 25 to 35 in the east, otherwise SW to W 30 to 40, reaching
50 to 60 in the south-west, that will spread to the south-east
while becoming NW 40 to 50 in the south-east by mid-period,
moderating to 25 to 35 by end of period.
VIS : Moderate to poor in showers and rain, with snow at times.
SEA STATE: 3.5 to 4.5m, becoming 5.0 to 7.0m in the west towards mid-
period, and spreading eastwards while reaching 7.0 to 8.0m in
the south spreading to the south-east by end of period, with W
to NW swell becoming SW to W swell from mid-period.
AREA 2:
=======
MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK
(AMSTERDAM-CROZET-KERGUELEN)
26/06/12 AT 1600UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40%
STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- FORCE 8 GALES FORECAST OVER KER.
- FORCE 10 STORM EXPECTED OVER CRO.
PART 2: GENERAL SYNOPSIS, 26/06/12 AT 1200UTC
- A QUASI-STATIONARY HIGH-PRESSURE SYSTEM (1032 HPA) NEAR 32OS/78OE.
- A STORMY LOW-PRESSURE SYSTEM (1008 HPA) FILLING NEAR 30OS/51OE AND
MOVING SLOWLY EASTWARDS, PRECEDED BY CONVERGENCE LINES.
- A COLD FRONT (CG) OVER WESTERN CRO ARRIVING DURING THE NIGHT.
PART 3: FORECAST FOR 24 HOURS FROM 26/06/12 AT 1800UTC TO 26/06/13
AT 1800UTC
WAM (30S/40S, 50E/65E)
SHOWERS AND LOCALLY STORMY SQUALLS ASSOCIATED WITH A LOW-PRESSURE
SYSTEM.
WIND: NORTH 3/4, OCCASIONALLY 5, BUT NORTH-WESTERLY 4/5, OCCASIONALLY 6.
GUSTS DURING SQUALLS. FRESHENING NORTH-WESTERLY 6 TO 8 WITH GUSTS
OVER FAR SOUTH-WESTERN AHEAD OF THE COLD FRONT TOWARDS THE END OF
THE FORECAST PERIOD.
SEA : MODERATE TO ROUGH.
VISIBILITY: POOR TO VERY POOR DURING RAINFALL.
AMS (30S/40S, 65E/80E)
SCATTERED SHOWERS, BUT OCCASIONALLY STORMY SQUALLS IN THE FAR WEST
ASSOCIATED WITH NORTH-SOUTH CONVERGENCE LINES.
WIND: ANTICLOCKWISE 3/4, OCCASIONALLY 5, FRESHENING NORTH 4/5 OVER
WESTERN LATER, OCCASIONALLY 6. GUSTS DURING SQUALLS.
SEA : MODERATE TO ROUGH. SOUTH-WESTERLY SWELL 2 TO 3 M OVER FAR
SOUTHERN, ABATING.
VISIBILITY: MODERATE DURING RAINFALL, BUT VERY POOR DURING SQUALLS.
CRO (40S/50S, 50E/65E)
RAIN AND FRONTAL SHOWERS WITH CG.
WIND: NORTH-WESTERLY 5 TO 7 AHEAD OF CG, BECOMING CLOCKWISE 7/8, LOCALLY
9/10, BEHIND CG OVER THE SOUTH-WESTERN REGION, AND SETTLING
WESTERLY 7/8 OVER THE NORTH-WESTERN REGION BY THE END OF THE
FORECAST PERIOD.
SEA : MODERATE TO ROUGH. WESTERLY SWELL 2 TO 3 M, CROSS-SWELL WITH HEAVY
WIND-DRIVEN SEAS OVER SOUTHERN.
VISIBILITY: POOR TO VERY POOR IN RAINFALL.
KER (40S/50S, 65E/80E)
SCATTERED SHOWERS BECOMING MORE FREQUENT AS THE CG FRONT APPROACHES.
WIND: W 5 TO 7, VEERING NW 5/6, LOCALLY 7/8 AHEAD OF THE CG FRONT
TOWARDS THE END OF THE FORECAST PERIOD. GUSTS.
SEA : ROUGH TO VERY ROUGH. W SWELL 2 TO 3 METERS.
VISIBILITY: POOR DURING RAINFALL.