Bulletinset for METAREA 7
Edition date (UTC): 2025-09-13 21:31:28
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HIGH SEAS FORECAST
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FQZA31 FAPR 131700



WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.

ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE

13TH OF SEPTEMBER 2025 AT 17:00 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 central parts, drifting to south-east by mid-

            period.



2. CAPE WEST: W to NW 35 in the south.



3. CAPE EAST: NW 35 in the south-west towards the end of the period.



4. MARION FORTIES EAST: W to SW 35 to 40 in the south.





SYNOPTIC CHART 12:00Z

=====================

High 1025 hPa 33s10e, High 1020 hPa 34s40e.



Low   998 hPa 36s18w, Low   995 hPa 41s09w, Low   949 hPa 57s52e.



1. Cold Front: 25s19w 30s10w 35s03w 40s04e 42s00e into 41s09w.



2. Cold Front: 42s41e 45s47e 50s52e 53s60e 58s60e into 57s52e.



AREA FORECAST:

==============

ASCENSION (06S/15S, 00E/20W):

WIND     : SE to E 10 to 20.

VIS      : Good.



ANGOLA (06S/15S, 00E/00N):

WIND     : S to SE 05 to 15, but SW 05 to 10 in the east.

VIS      : Good.



ST HELENA (15S/30S, 00E/20W):

WIND     : E to SE 05 to 15, but NW to W 10 to 20 in the south, becoming

           SW 10 to 15 in the south-west from mid-period.

VIS      : Good, but moderate in showers and rain in the south-west.

SEA STATE: 3.0 to 3.5m in the south-west, with W to SW swell.



TRADES (15S/30S, 00E/WEST COAST):

WIND     : S to SE 05 to 15, reaching 20 to 25 in the south-east.

VIS      : Good.

SEA STATE: 3.0 to 3.5m in the south-east until mid-period, with S to SW

           swell.



TRISTAN (30S/40S, 00E/20W):

WIND     : NW to W 15 to 25 reaching 30 to 35 in the central parts,

           drifting to south-east by mid-period, but S to SW 15 to 25 in

           the south-west spreading over the western half by mid-period.

VIS      : Moderate to poor in showers and rain becoming good in the

           north-west from mid-period.

SEA STATE: 3.5 to 4.5m, reaching 5.0 to 5.5m in the south-west in the

           first half of the period, but in the south-east in the second

           half of the period, with NW to W swell, but SW in the south-

           west spreading over the western half by mid-period.



CAPE WEST (30S/40S, 00E/20E):

WIND     : S to SE 10 to 20 in the north-east, otherwise W to NW 15 to 25

           reaching 30 to 35 in the south.

VIS      : Good, but moderate in rain and showers in the south.

SEA STATE: 3.0 to 4.0m in the south reaching 4.5 to 5.0m towards the end

           of the period, with SW to W swell, becoming NW in the west

           from mid-period.



CAPE EAST (32.5S/40S, 20E/50E):

WIND     : NW 10 to 20 in the east at first, otherwise SW 10 to 20, but

           anticyclonic 05 to 15 in the in the west spreading to the

           eastern parts by the end of the period. It will become NW 15

           to 25 in the west towards mid-period reaching 30 to 35 in the

           south-west towards the end of the period.

VIS      : Good, but moderate in showers and rain in places in the east

           and south.

SEA STATE: 3.0 to 4.0m, except in the north-east, reaching 4.5 to 5.0m in

           the south, with SW swell.



DURBAN EAST (32.5S/25S, EAST COAST/55E):

WIND     : S to SE 05 to 15 in the western parts reaching 20 in the

           south-west at first, otherwise N to NE 10 to 20 reaching 25 in

           the central-north.

VIS      : Good, but moderate in showers and rain in the south.

SEA STATE: 3.0 to 3.5m in the south-west towards mid-period, with SW

           swell.



MOZAMBIQUE CHANNEL:

WIND     : S to SE 05 to 15, but W to NW 05 to 15 in the east.

VIS      : Good.



MADAGASCAR EAST (10S/25S, EAST COAST/55E):

WIND     : NE 10 to 20 in the south reaching 25 in the south-west,

           otherwise E to SE 10 to 20 reaching 25 in the north-east.

VIS      : Good.



MARION FORTIES EAST (40S/50S, 35E/50E):

WIND     : W to SW 15 to 25 in the north, otherwise 25 to 35 reaching 40

           in the south from mid-period, becoming NW 15 to 25 in the

           north and west towards the end of the period.

VIS      : Moderate to poor in showers and rain, but with snow showers in

           the south, becoming good in the north towards mid-period.

SEA STATE: 3.5 to 4.5m in the north-east until mid-period, otherwise 5.0

           to 6.0m, reaching 6.5 to 8.0m over the southern half, with W

           to SW swell.



AREA 2:

=======

MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA

ACK (AMSTERDAM-CROZET-KERGUELEN)



25/09/13 AT 1700UTC



AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40%

STRONGER THAN THE AVERAGES GIVEN HERE).



PART 1: WARNING



GALE RUNNING OVER CRO AND KER.

LOCALLY STRONG GALE OVER SOUTH-WEST CRO AT THE END



PART 2: GENERAL SYNOPSIS, 25/09/13 AT 1200UTC



- HIGH 1027 HPA NEAR 29S/68E, QUASI-STATIONARY.

- LOW 994 HPA LEAVING THE AREA SOON FROM THE EAST, WITH COLD FRONT

CFAXIS 33S50E, 39S/75E, 43S/78E.

-  CG FRONT OVER SOUTHWESTERN CRO, MOVING RATHER RAPIDLY EASTWARD.





PART 3: FORECAST FOR 24 HOURS FROM 25/09/13 AT 1800UTC  TO 25/09/14

AT 1800UTC



WAM (30S/40S, 50E/65E)

RAIN AND FRONTAL SHOWERS.(CF)

WIND: W OR NW 4/6, LOCALLY VARIABLE 2/3 BEHIND FRONT CF, BECOMING

VARIABLE 2/4 OVER THE WEST AT THE END.

SEA: MODERATE TO ROUGH FROM NORTH TO SOUTH. SW SWELL 2/4M.

VISI: POOR UNDER PRECIPITATION.





AMS (30S/40S, 65E/80E)

RAIN AND FRONTAL SHOWERS TO THE SOUTH ( CF).

WIND:

IN THE NORTH: WESTERLY 3/5.

IN THE SOUTH: NW 5/6 IN THE SOUTHEAST AND VARIABLE 2/4 IN THE

SOUTHWEST AT FIRST, THEN INCREASING WESTERLY 5/6.

SEA: ROUGH, BUT MODERATE IN THE NORTHWEST AND VERY ROUGH IN FAR

SOUTHERN. SOUTH-WESTERLY SWELL 2/4M, BUT SOUTHERLY SWELL 2/3M IN THE

NORTH-EAST AT FIRST.

VISI: POOR UNDER PRECIPITATION.





CRO (40S/50S, 50E/65E)

RAIN AND FRONTAL SHOWERS, SNOW IN THE SOUTH.(CG)

WIND:

NW 6/7 LOCALLY 8 AHEAD OF THE FRONT, BACKING WESTERLY 6/7 IN THE

NORTH AND 7/8 IN THE SOUTH, REACHING LOCALLY 9 IN THE SOUTHWEST WITH

VIOLENT GUSTS AT THE END.

SEA: VERY ROUGH TO HIGH FROM NORTH TO SOUTH, LOCALLY ROUGH IN THE

NORTH AT THE START. SOUTH-WESTERLY SWELL 3/5M, INCREASING 5/7M IN THE

WEST DURING THE DAY.

VISI: POOR TO VERY POOR UNDER PRECIPITATION.





KER (40S/50S, 65E/80E)

RAIN AND SNOW SHOWERS TO THE SOUTH. ( CF OVERS EASTERN A FIRST  THEN

CG)

WIND: WESTERLY 4/6, INCREASING DURING THE DAY NW 6/7 WITH GUSTS AHEAD

OF THE FRONT CG, THEN LATER BACKING BEHIND WESTERLY 5/6 IN THE NORTH

AND 7/8 IN THE SOUTH OVER THE SOUTHWEST HALF. BUT CLOCKWISE 7/8 TO

THE SOUTHEAST AT FIRST (CF).

SEA: VERY ROUGH, BECOMING HIGH IN THE SOUTHWEST AND LOCALLY HIGH IN

THE EAST AT FIRST. SOUTH-WESTERLY SWELL 3/5M.

VISI: POOR TO VERY POOR UNDER PRECIPITATION.