WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
13TH OF JUNE 2026 AT 18:00 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-west towards the end of the period.
2. MARION FORTIES EAST: SW 35 to 40 in the south but in the east at
first.
SYNOPTIC CHART 12:00Z
=====================
High 1037 hPa 36s06w, High 1029 hPa 38s23e
Low 965 hPa 51s51e
1. Cold Front: 29s37e 35s46e 40s50e 45s53e into 51s51e
AREA FORECAST:
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ASCENSION (06S/15S, 00E/20W):
WIND : SE to E 10 to 20.
VIS : Good.
ANGOLA (06S/15S, 00E/00N):
WIND : Variable 05 to 10 in the east, otherwise S to SE 10 to 20,
reaching 25 in the south until towards mid-period.
VIS : Good.
SEA STATE: 3.0m in the south, with S to SE swell.
ST HELENA (15S/30S, 00E/20W):
WIND : E to SE 15 to 25, but NE to N 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 15 to 25, reaching 30 in the east towards the end of
the period.
VIS : Good.
SEA STATE: 3.0 to 4.0m, with S swell.
TRISTAN (30S/40S, 00E/20W):
WIND : NE 15 to 25 in the north-west, otherwise NW 15 to 25 reaching
30 to 35 in the south-west towards the end of the period, but
anticyclonic 05 to 15 in the east.
VIS : Good, becoming moderate to poor in showers and thundershowers
in the west towards the end of the period.
SEA STATE: 3.5 to 4.5m in the west towards the end of the period, with N
to NW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : E to NE 10 to 20 in the east and south-east at first,
otherwise S to SE 10 to 20, but SW 15 to 25 in the south-west,
spreading over the central parts towards mid-period, while
reaching 30 in the south-east.
VIS : Good, but moderate in showers and thundershowers in the south-
east.
SEA STATE: 3.0 to 3.5m in the eastern half, with SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : NE to E 20 to 30 in the north-west, otherwise anticyclonic 05
to 15 but SW 15 to 25 in the east, reaching 30 in the south-
east at first.
VIS : Good, but moderate to poor in showers and thundershowers in
the west, spreading over the central parts towards the end of
the period.
SEA STATE: 3.0 to 3.5m, reaching 4.0 to 6.0m in the eastern parts but in
the central parts until mid-period, with SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : NE 15 to 25 in the west, otherwise E to SE 10 to 20 but S to
SW 10 to 20 in the south-east at first, but in the south-west
towards the end of the period.
VIS : Good, but moderate to poor in showers and thundershowers in
the central and south-western parts.
SEA STATE: 3.0 to 3.5m, reaching 4.0 to 4.5m in the south, with S to SW
swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 10 to 20, becoming NE 10 to 20 in the south-west
towards the end of the period.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : Variable 05 to 10 in the south at first, otherwise E to SE 05
to 15, reaching 20 to 25 in the north towards the end of the
period.
VIS : Moderate in showers and thundershowers in places.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : SW 20 to 30, reaching 35 to 40 in the south but in the east at
first.
VIS : Moderate in showers and rain, but with snow over the southern
parts until mid-period.
SEA STATE: 5.0 to 7.0m, subsiding to 4.0m in the west by mid-period, 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)
26/06/13 AT 1800UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40%
STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALES FORECAST OVER KER.
- ONGOING STORM OVER FAR SOUTHERN CRO.
PART 2: GENERAL SYNOPSIS, 26/06/13 AT 1200UTC
- DEEPENING LOW , 965 HPA, NEAR 51S/51E, MOVING EAST-SOUTHEASTWARD 30
KT, WITH ASSOCIATED COLD FRONT AXIS 33S/45E, 38S/51E, 45S/56E,
50S/56E.
- HIGH 1032 HPA NEAR 35S/80E MOVING SLOWLY EASTWARD .
- HIGH 1029 HPA, FORECAST OVER NORTHWESTERN WAM AT END.
PART 3: FORECAST FOR 24 HOURS FROM 26/06/13 AT 1800UTC TO 26/06/14
AT 1800UTC
WAM (30S/40S, 50E/65E)
FRONTAL RAIN, SHOWERS AND SQUALLS LEAVING THE AREA BY EASTERN LATER.
WIND : NW 5/6 AHEAD OF THE FRONT, BACKING SW 6/7 BEHIND. GUSTS.
BECOMING ANTICLOCKWISE 3/5 OVER WESTERN AT END.
SEA : MODERATE TO ROUGH BECOMING VERY ROUGH LOCALLY HIGH OVER
SOUTHWESTERN HALF OVERNIGHT WITH SW SWELL INCREASING NEAR 5 METERS.
VIS : POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
FRONTAL RAIN, SHOWERS AND SQUALLS.
WIND : ANTICLOCKWISE 3 TO 5, INCREASING NW 6/7 AHEAD OF FRONT
TONIGHT AND BACKING SW 6/7 BEHIND LATER. GUSTS.
SEA : MODERATE TO ROUGH BECOMING VERY ROUGH OVER SOUTHWESTERN AT END.
VIS : POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
RAIN, SHOWERS AND THUNDERY SQALLS WITH THE FRONT. SHOWERS BEHIND
(SNOW OVER SOUTHERN)
WIND : WESTERLIES 7/8, AT TIMES 9/10 OVER FAR SOUTHERN AT START.
SEVERE GUSTS.
SEA : VERY ROUGH TO HIGH AND CROSSED. WESTERLY SWELL 4 TO 5 METERS.
VIS : POOR OR VERY POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
RAIN, SHOWERS AND THUNDERY SQALLS WITH THE FRONT. SHOWERS BEHIND
(SNOW OVER SOUTHERN)
WIND : INCREASING NW 7/8 AHEAD OF FRONT AND BACKING W 6 TO 7 LOCALLY
8 OVER SOUTHERN AREA . GUSTS.
SEA : ROUGH TO VERY ROUGH, BECOMING HIGH IN SOUTHWEST LATER WITH
WESTERLY SWELL 4 METERS.
VIS : POOR OR VERY POOR IN PRECIPITATION.