WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
13TH OF MAY 2026 AT 16:00 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. CAPE EAST: W to SW 35 to 45 in the central and south-eastern parts until
towards mid-period, but W to NW 35 in the east at first, but
in the south-west towards mid-period, spreading to the south
by mid-period.
2. MARION FORTIES EAST: W to SW 35 to 40, but NW 35 to 45 in the north-east
at first.
SYNOPTIC CHART 12:00Z
=====================
High 1024 hPa 30s01w
Low 986 hPa 46s04w, Low 986 hPa 42s39e
1. Cold Front: 29s17w 35s05w 40s01e into 46s04w
2. Cold front: 35s20e 36s35e 40s37e into 42s39e
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : E to SE 10 to 20.
VIS : Good.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 10 to 20, but SW 05 to 15 in the east.
VIS : Good, but moderate to poor in showers and thundershowers in the
east at times.
ST HELENA (15S/30S, 00E/20W):
WIND : Anticyclonic 05 to 15 in the south-east, otherwise SE to E 10 to
20 but N to NW 05 to 15 in the south-west.
VIS : Good, but moderate in showers and thundershowers in the south-
west.
SEA STATE: 3.0m in the west and south-west, with SW swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 15 to 25, reaching 30 in the south-east, but in the
north-west towards the end of the period.
VIS : Good.
SEA STATE: 3.0 to 3.5m in the eastern parts, with S to SW swell.
TRISTAN (30S/40S, 00E/20W):
WIND : Anticyclonic 05 to 15 in the extreme north-east, otherwise NW 15
to 25 reaching 30 in the south-west.
VIS : Good, but moderate in showers and rain in the northern parts, but
in the south-western parts towards mid-period.
SEA STATE: 3.0 to 4.0m reaching 4.5 to 5.5m in the south-west, with W swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : Anticyclonic 05 to 15 in the north-west, otherwise W to SW 10 to
20 reaching 25 to 30 in south-east, but NW 20 to 30 in the south-
west, drifting to the south-east towards mid-period.
VIS : Good, but moderate to poor in showers and rain in the south-west,
drifting to the south-east towards mid-period.
SEA STATE: 3.0 to 3.5m reaching 4.0 to 5.0m in the south-east, with SW
swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : W to SW 20 to 30 reaching 35 to 45 in the central and south-
eastern parts until towards mid-period, but W to NW 25 to 35 in
the east at first, but in the south-west towards mid-period,
spreading to the south by mid-period.
VIS : Moderate to poor in rain and thundershowers, but good in the
extreme north-west.
SEA STATE: 8.0 to 9.0m in the central and south-eastern parts at first,
otherwise 5.0 to 7.0m but 3.0 to 4.0m in the extreme west, with
SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : NW 10 to 20 in the south-east at first, but NE to E 10 to 20 in
the north-east, otherwise S to SE 10 to 20 but SW 10 to 20 in the
south-west. It will become anticyclonic 05 to 15 in the west
towards the end of the period.
VIS : Good, but moderate in showers and thundershowers in the east and
west.
SEA STATE: 3.0 to 4.0m, reaching 4.5 to 5.5m in the south-west, drifting to
the south-east by the end of the period, with S to SW swell.
MOZAMBIQUE CHANNEL:
WIND : Variable 05 to 10, but SE 10 to 20 in the north, spreading to the
south towards the end of the period, but 20 to 30 in the south-
west at first.
VIS : Good, but moderate in showers and rain in places over the
northern parts.
SEA STATE: 3.0m in the extreme south towards the end of the period, with S
to SW swell.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : E to SE 10 to 20, but NE 10 to 20 in the south.
VIS : Moderate in rain and showers in places.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : Variable 05 to 10 in the south at first, otherwise W to SW 30 to
40, but NW 35 to 45 in the north-east at first.
VIS : Moderate to poor in rain and showers.
SEA STATE: 4.0 to 6.0m reaching 7.0 to 9.0m in the north, with W swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
26/05/13 AT 1600UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40%
STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALE EXPECTED OVER WAM AND KER.
- VIOLENT STORM EXPECTED OVER CRO.
PART 2: GENERAL SYNOPSIS, 26/05/13 AT 1200UTC
- COLD FRONT SOON OVER WESTERN CRO AND WAM, LINKED WITH A RAPIDLY
DEEPENING LOW 989 NEAR 42S/39E, EXPECTED 960 NEAR 52S/54E THE 14/05
AT 12UTC, PRECEDE BY CONVERGENCE LINES
- HIGH 1034 NEAR 39S/78E, SLOWLY MOVING EASTWARD.
PART 3: FORECAST FOR 24 HOURS FROM 26/05/13 AT 1800UTC TO 26/05/14
AT 1800UTC
WAM (30S/40S, 50E/65E)
FRONTAL RAIN, SHOWERS AND SQUALLS AND IN CONVERGENCE LINES. FEW
SHOWERS OVER FAR NORTH-EASTERN.
WIND: NW 5/6 INCREASING 7/8 OVER FAR SOUTH-WESTERN WITH SEVERE GUSTS,
BUT N 3/4 OVER FAR NORTH-EASTERN. DECREASING W 5/6 LATER OVER
SOUTH-WESTERN BEHIND THE FRONT, AT TIMES 7.
SEA: ROUGH TO VERY ROUGH, BUT HIGH OVER SOUTH-WESTERN BY W SWELL
INCREASING 4 TO 6M, AND MODERATE OVER FAR NORTH-EASTERN.
VISI: POOR OR VERY POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
SHOWERS OVER FAR NORTH-EASTERN.
WIND: ANTICLOCKWISE3/4 AT TIMES 5, BUT E 5/6 WITH GUSTS OVER FAR
NORTH-EASTERN.INCREASING NW 5/6 LATER OVER FAR SOUTH-WESTERN WITH
GUSTS.
SEA: MODERATE TO ROUGH, BUT VERY ROUGH AT END OVER FAR SOUTH-WESTERN.
VISI : POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
FRONTAL RAIN, SHOWERS AND SQUALLS AND IN CONVERGENCE LINES. SHOWERS
BEHIND.
WIND: N 5/6 AT TIMES 7, INCREASING CLOCKWISE 8/9 BUT 10/11 IN THE
NORTH PART OF THE LOW CENTER, DECREASING NW 7/8 AT END. VIOLENT
GUSTS.
SEA : ROUGH TO VERY ROUGH AND CROSSED, BECOMING VERY ROUGH TO HIGH,
LOCALLY VERY HIGH IN THE VICINITY OF THE LOW CENTER. LON W SWELL 4 TO 5M, THEN SOON NEW W SWELL FROM NORTH-WESTERN INCREASING 5 TO 7M.
VISI: POOR OR VERY POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
RAIN, SHOWERS AND SQUALLS IN CONVERGENCE LINES, THEN DUE TO FRONT
OVER WESTERN LATER.
WIND: NW 5/6 AT TIMES 7, LOCALLY 8 OVER FAR SOUTH-WESTERN LATER.
GUSTS.
SEA: MODERATE TO ROUGH, BECOMING VERY ROUGH TO HIGH OVER WESTERN BY W
SWELL INCREASING 4 TO 5M.
VISI: POOR OR VERY POOR IN PRECIPITATION.=