WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
20TH OF JULY 2026 AT 17:40 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 202200 TO 212200 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. MARION FORTIES EAST: NW 35 in the south-east until mid-period.
SYNOPTIC CHART 12:00Z
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High 1028 hPa 28s24w, High 1021 hPa 40s46e, High 1018 hPa 47s00w
Low 1004 hPa 40s10w, Low 959 hPa 58s42e
1. Cold Front: 36s18w 37s12w 42s09w into 40s10w
2. Cold Front: 40s10e 44s20e 51s36e 56s43e into 58s42e
AREA FORECAST:
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ASCENSION (06S/15S, 00E/20W):
WIND : SE 10 to 20, but 25 in the south-west.
VIS : Good.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 05 to 15 in the west, otherwise variable 05.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : Variable 05 to 10 in the south-east, otherwise E to SE 10 to
20 in the north-west by the end of the period.
VIS : Good.
TRADES (15S/30S, 00E/WEST COAST):
WIND : Variable 05 to 10 in the south-west and the north-east,
otherwise S to SE 05 to 15.
VIS : Good.
TRISTAN (30S/40S, 00E/20W):
WIND : W to NW 10 to 20, reaching 25 in the south-east, becoming
anticyclonic in the north-west by the end of the period.
VIS : Good in the north-west at first, otherwise moderate in
showers, clearing in over the central south towards mid-
period.
SEA STATE: 3.0 to 4.0m, reaching 4.5 in the south, with W to SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : Anticyclonic 05 to 10 in the north-east, otherwise NW to W 15
to 25, reaching 30 in the south.
VIS : Good but moderate in showers and rain in the south.
SEA STATE: 3.0 to 3.5m in the south, with W to SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : Anticyclonic 05 to 15 in the north-east, otherwise W to SW 05
to 15, but E to NE 15 to 25 over the central parts spreading
to the south-east by mid-period.
VIS : Good but moderate in showers in the south and the extreme
east.
SEA STATE: 3.0 to 3.5m, with S to SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : Variable 05 to 10 in the west but SE to E 05 to 15 in the
east.
VIS : Good but moderate in showers over the central parts at first
and the north-east until the end of the period.
SEA STATE: 3.0m in the south-east, with S to SW swell.
MOZAMBIQUE CHANNEL:
WIND : Variable 05 to 10, but E to SE 05 to 10 in the east.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : Variable 05 to 10 over the central parts, otherwise S to SE 05
to 15.
VIS : Good, but moderate in showers and rain the south-east.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : S to SW 20 to 30, but NW 15 to 25 in the north-east, reaching
30 to 35 in the south-east until mid-period.
VIS : Good in the north-east at first, otherwise moderate in showers
and rain, spreading to the north-east by mid-period.
SEA STATE: 3.0 to 4.0m with NW swell in the north-east, reaching 4.5 to
5.5m in the south, with S to SE swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA
ACK (AMSTERDAM-CROZET-KERGUELEN)
26/07/20 AT 1700UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40%
STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- NIL.
PART 2: GENERAL SYNOPSIS, 26/07/20 AT 1200UTC
- FILLING LOW 985 HPA NEAR 43S/66E MOVING EASTWARD
- HIGH 1022 HPA NEAR 40S/46E, EXPECTED OVER NORTHWESTERN WAM AT END.
- COLD FRONT AXIS 43S/14E, 49S/28E, 55S/37E EXPECTED OVER
SOUTHWESTERN CRO AT END.
PART 3: FORECAST FOR 24 HOURS FROM 26/07/20 AT 1800UTC TO 26/07/21
AT 1800UTC
WAM (30S/40S, 50E/65E)
SCATTERED SHOWERS.
WIND: W OR SW 5 TO 6 LOCALLY 7 OVER SOUTHWEST AT FIRST DECREASING 2
TO 4 AT TIMES 5 BY WESTERN AREA SOON.
SEA: ROUGH TO VERY ROUGH. S SWELL 3 TO 5 METERS ABATING.
VISI: POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
RAIN AND FRONTAL SHOWERS, LOCALLY SQUALLS.
WIND: NW OR WESTERLY 5 TO 6 , LOCALLY 7 OVER SOUTHERN, AND DECREASING
W 3 TO 4 OVER NORTHERN AREA LATER. GUSTS.
SEA: ROUGH TO VERY ROUGH. WESTERLY SWELL 3 TO 4 M.
VISI: POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
SHOWERS.
WIND: S 4 TO 6 AT TIMES 7 OVER EASTERN INCREASING NW 5 TO 6 , LOCALLY
7, AHEAD THE FRONT OVER SOUTHWESTERN AND BACKING SW 5 TO 6 BEHIND AT
END. GUSTS.
SEA: ROUGH TO VERY ROUGH. ARRIVAL A W SWELL 2 TO 3 M.
VISI: POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
SHOWERS AND SQUALLS.
WIND: CLOCKWISE 4 TO 6, AT TIMES 7, SETTING UP LATER SW 5 TO 6 BY
WESTERN AREA. GUSTS.
SEA: ROUGH TO VERY ROUGH. WESTERLY OR NW SWELL 2 TO 4 M ABATING.
VISI: POOR IN PRECIPITATION.=