WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
10th OF JULY 2026 AT 08:30 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:
=======
FORECAST VALID FROM 101000 TO 111000 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 : Cyclonic 35 over the central parts and the south-east moderating
from the end of the period.
2. MARION FORTIES EAST : W to SW 35 to 45 in the central north and the west,
shifting south from mid-period.
SYNOPTIC CHART 06:00Z
=====================
High 1030 hPa 44s06e; Low 999 hPa 32s14w; Low 998 hPa 41s22w;
Low 979 hPa 50s59e
1. Cold Front: 18s25w 23s19w 27s15w 31s13w into 32s14w.
2. Cold Front: 36s23e 40s21e 43s23e into 41s22w.
3. Cold Front: 30s43e 35s54e 42s60e 49s61e into 50s59e.
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 15 but SW 05 to 10 in the east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : W to NW 15 to 25 reaching 30 in places in the south until mid-
period, but variable 05 to 10 in the east and the west towards the
end of the period.
VIS : Good but moderate in a band of showers and thundershowers across
the north-west, central parts and the south-east.
SEA STATE: 3.0m, with W to NW swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 10 to 20 but variable 05 to 10 in the south-west.
VIS : Good.
TRISTAN (30S/40S, 00E/20W):
WIND : Cyclonic 15 to 25 over the central parts, where it will reach 30
to 35 in the south-east moderating from the end of the period,
otherwise, NW to W 15 to 25.
VIS : Moderate to poor in showers and thundershowers in the west and
Central spreading to the east, otherwise good.
SEA STATE: 3.0 to 4.0m, reaching 4.5m over the central and the south-east,
subsiding from mid-period, with W to NW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : S to SE 10 to 20, reaching 25 in the north-east, but E to NE 15 to
25 in the south-west.
VIS : Good, but moderate in the west.
SEA STATE: 3.0 to 4.0m in the east, 3.5 to 4.5m in the extreme south-east,
with SW to S swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : S to SW 10 to 20 in the east, reaching 25 to 30 in the south-east,
otherwise, E to SE 05 to 15.
VIS : Good, but moderate in north-west, central parts and the east.
SEA STATE: 3.0 to 4.0m in the west, otherwise 4.5 to 5.0m, reaching 5.5m in
the south-east, with SW to S swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : N to NW 10 to 20 in the east otherwise, S to SE 10 to 20, but
variable 05 to 10 in the north and the central parts.
VIS : Moderate in showers and rain in the north but moderate in
showers and thundershowers in places in the central and south-east
as well as the west from the end of the period.
SEA STATE: 3.0 to 4.0m, reaching 4.5m in the extreme south, with SW swell.
MOZAMBIQUE CHANNEL:
WIND : Variable 05 to 10 in the south, otherwise S to SE 05 to 15.
VIS : Good but moderate in showers and rain in places over the
central parts.
SEA STATE: 3.0m in the extreme south-east by the end of the period, with SW
swell.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : E to SE 15 to 25 in the north, otherwise NE to N to 05 to 15.
VIS : Good in the south-east, otherwise moderate in showers and rain.
SEA STATE: 3.0m in the south-west towards the end of the period, with S to SE
swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to SW 25 to 30, reaching 35 to 45 in the central north, and the west, shifting south from mid-period.
VIS : Good in the north-west, otherwise moderate in showers and rain but
poor in snow-showers in the south.
SEA STATE: 4.0 to 4.5m in the south-east at first, otherwise 5.0 to
6.0m reaching 7.0m in the north and central parts and the north-
west, with W to SW swell.
AREA 2:
=======
MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
26/07/10 AT 0500UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40%
STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALE OVER WAM AN AMS
- STRONG GALE OVER CRO AND KER.
PART 2: GENERAL SYNOPSIS, 26/07/10 AT 0000UTC
- HIGH 1038 NEAR 34S/80E, SLOWLY MOVING EASTWARD.
- LOW 977 NEAR 48S/53E, WITH ASSOCIATED COLD FRONT (CF) AXIS 35S/44E,
42S/56E, 48S/56E, AND WARM FRONT (WF), AXIS 45S/63E, 49S/55E, 47S/52E, ALL
MOVING RAPIDLY SOUTH-EASTWARD.
- CONVERGENCE LINES PRECEDED BY CF OVER WAM, MOVING EASTWARD.
- COLD FRONT (CG) LATER OVER CRO AND SOUTHERN WAM.
PART 3: FORECAST FOR 24 HOURS FROM 26/07/10 AT 0600UTC TO 26/07/11 AT
0600UTC
WAM (30S/40S, 50E/65E)
SHOWERS AND SQUALLS LOCALLY THUNDERY, THEN FRONTAL RAIN AND SHOWERS
OVER SOUTHERN WITH CG LATER.
WIND: NORTH-WESTERLY 5/6, BUT 7/8 WITH SEVERE GUST OVER SOUTH-EASTERN
AT FIRST, INCREASING 6/7 OVER SOUTHERN LATER.
SEA: ROUGH TO VERY ROUGH, TEMPORARILY HIGH OVER FAR SOUTHERN. SW
SWELL 3 TO 5M.
VIS : POOR OR VERY POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
SHOWERS AND SQUALLS SOON OVER SOUTH-WESTERN.
WIND: ANTICLOCKWISE 3/4 AT TIMES 5 OVER NORTH-EASTERN, BUT
NORTH-WESTERLY 5 TO 7 FROM NORTH TO SOUTH ELSEWHERE, AT TIMES 8 OVER
FAR SOUTH-WESTERN AT FIRST WITH SEVERE GUSTS.
SEA : ROUGH TO VERY ROUGH, TEMPORARILY HIGH OVER FAR SOUTH-WESTERN AND
MODERATE OVER FAR NORTHERN AT FIRST. SW SWELL 3 TO 5M OVER SOUTHERN.
VIS : POOR OR VERY POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
FRONTAL RAIN AND SHOWERS, AT TIMES THUNDERY WITH CF, THEN WITH CG.
WIND : CLOCKWISE 7/8 AT TIMES 9, DECREASING NORTH-WESTERLY 5/6 AT
TIMES 7, INCREASING 7/8 OVER NORTHERN LATER. SEVERE GUSTS.
SEA : VERY ROUGH TO HIGH. W SWELL 4 TO 6M ABATING 3 TO 5M LATER.
VIS : POOR OR VERY POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
FRONTAL RAIN, SHOWERS AND SQUALLS.
WIND: INCREASING CLOCKWISE 7/8 AT TIMES 9, DECREASING NORTH-WESTERLY
5/6 AT TIMES 7. SEVERE GUSTS.
SEA : VERY ROUGH TO HIGH. WESTERLY SWELL 4 TO 6 M.
VIS : POOR OR VERY POOR IN PRECIPITATION.=