WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII EAST OF 20E.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
27th OF JULY 2026 AT 17:00 UTC.
FOR SOUTH-EAST SECTOR OF METAREA. VII, PREPARED BY REUNION, SEE AREA 2
BELOW.
NOTE: WX OBSERVATIONS.
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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 272200 TO 282200 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: SW to W 35 in the north-east at first as well as in
places in the south.
SYNOPTIC CHART 12:00Z
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High 1026 hPa 36s56e.
1. Cold Front: 34s22e 36s29e 40s36e 43s43e into 44s42e.
AREA FORECAST:
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CAPE EAST (32.5S/40S, 20E/50E):
WIND : NW to N 15 to 25 in the east, otherwise SW to S 20 to 30 in the central parts spreading to the east from mid-period becoming anticyclonic 05 to 15 in the west from mid-period.
VIS : Good but moderate in showers and rain in the extreme north-
western and north-central parts as well as in the east.
SEA STATE: 3.0 to 4.0m reaching 4.5 to 5.0m in places in the south-central parts at first, with SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : SE to S 20 to 30 in south-west, otherwise E to NE 10 to 20 but
variable 05 to 10 in the south-east and north-west.
VIS : Good but moderate to poor in showers and thundershowers in the
western and central parts.
SEA STATE: 3.0 to 4.0m in the east until mid-period, becoming 4.5 to 5.0m in the south-west from mid-period, with S to SW swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 05 to 15.
VIS : Good but moderate in showers and rain in places in the south.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : Variable 5 to 10 in the south, otherwise S to SE 10 to 20.
VIS : Good but moderate in showers and rain in places in the south- west and north-east.
SEA STATE: 3.0m in the extreme south, with SW swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : SW to W 15 to 25 reaching 30 to 35 in the north-east at first
and in the south.
VIS : Good but moderate in showers and rain in the north-east at first.
SEA STATE: 4.0 to 5.0m, reaching 5.5 to 6.5m in the south-west, spreading to the south-east towards mid-period, with SW to W swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
26/07/27 AT 1700UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40%
STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- SEVERE GALE OVER CRO
- VIOLENT STORM OVER KER.
PART 2: GENERAL SYNOPSIS, 26/07/27 AT 1200UTC
- HIGH AT 1026 HPA NEAR 35S 70E, EXTENDING WESTWARDS AS A RIDGE.
- LOW AT 1001 HPA NEAR 45S 43E IS DEEPENING, FORECAST TO REACH 994
HPA NEAR 47S 57E ON THE 28TH AT 00 UTC, WITH A DISTURBED SYSTEM
INCLUDING COLD FRONTS CENTRED ON 45S 43E, 40S 38E AND 35S 31E.
- COLD FRONT CENTRED AT 44S/59E, 46S/68E, 50S/71E, MOVING EASTWARDS.
PART 3: FORECAST FOR 24 HOURS FROM 26/07/27 AT 1800UTC TO 26/07/28
AT 1800UTC
WAM (30S/40S, 50E/65E)
SCATTERED SHOWERS IN THE FAR NORTH, BECOMING FREQUENT IN THE
SOUTH-WEST AS THE COLD FRONT MOVES IN.
WIND:
VARIABLE FORCE 2 TO 4 VEERING NORTHWEST, FORCE 5 TO 6 TO THE SOUTH OF
THE AREA, SUBSEQUENTLY VEERING SOUTHEAST FORCE 5 TO THE SOUTHWEST OF
THE AREA BEHIND THE FRONT.
SEA: ROUGH TO VERY ROUGH IN THE SOUTHEAST AT FIRST. SOUTH-WESTERLY
SWELL OF 2.50 M TO 3 M, LOCALLY 4 M IN THE SOUTH-EAST AT FIRST
VISI: POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
ISOLATED SHOWERS.
WIND:
VARIABLE ANTICLOCKWISE 2/4, VEERING NORTHWEST 5 TO 6 TO THE SOUTH OF
THE AREA.
SEA: ROUGH TO LLOCALLY VERY ROUGH IN THE SOUTH. ARRIVAL OF
SOUTH-WESTERLY SWELL 3M TO 3.50M.
VISI: GOOD.
CRO (40S/50S, 50E/65E)
HEAVY RAIN AND FRONTAL SHOWERS.
WIND:
NORTHWEST 6 TO 7 LOCALLY 8, VEERING SOUTH TO SOUTH-WESTERLY 6 TO 7
LOCALLY 8 TO 9. SEVERE GUSTS.
SEA: VERY ROUGH TO HIGH, 4M TO 7M.
VISI: VERY POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
RAIN AND FRONTAL SHOWERS WITH CG FOLLOWED BY HEAVY RAIN ASSOCIATED
WITH THE LOW-PRESSURE SYSTEM.
WIND:
PREDOMINANTLY WESTERLY 5 TO 6, LOCALLY 7 TO 8 IN THE SOUTHERN PART OF
THE AREA AT FIRST; THEN NORTHWEST 7 TO 8, LOCALLY 9, VEERING WEST TO
SOUTHWEST OVER THE SOUTHERN HALF OF THE AREA FORCE 9 TO 10 LOCALLY
FORCE 11. VIOLENT GUSTS.
SEA: VERY ROUGH TO HIGH LOCALLY VERY HIGH, 4M TO 7M IN THE NORTHERN
HALF AND 7M TO 9M IN THE SOUTHERN HALF.
VISI: VERY POOR IN PRECIPITATION.=