WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
23RD OF APRIL 2024 AT 13:30 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:
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FORECAST VALID FROM 232200 TO 242200 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:
====================
Nil.
SYNOPTIC CHART 12:00Z
=====================
High 1020 hPa 27s14e.
High 1020 hPa 41s40e.
Low 1014 hPa 37s13e.
Low 1014 hPa 46s13e.
Low 1014 hPa 45s23e.
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : SE to E 15 to 20.
VIS : Good but moderate in showers in places in the central and
north-western parts.
ANGOLA (06S/15S, 00E/00N):
WIND : SE 10 to 20 but S to SW 05 to 15 in the extreme east.
VIS : Good but moderate in thundershowers in the extreme north-east
at times.
ST HELENA (15S/30S, 00E/20W):
WIND : Variable 05 in the extreme south at first, otherwise SE to E
10 to 20.
VIS : Good but moderate in showers and rain in places in the west.
TRADES (15S/30S, 00E/WEST COAST):
WIND : SE to S 10 to 20.
VIS : Good.
TRISTAN (30S/40SE, 00E/20W):
WIND : W to SW 05 to 15 becoming Variable 05 towards mid-period, but
NE to N 10 to 20 in the west in the second half of the period.
VIS : Good but moderate in showers and rain in places.
SEA STATE: 3.0 to 3.5m in places in the south-western half, SW swell,
subsiding from the west towards the end of the period.
CAPE WEST (30S/40S, 00E/20E):
WIND : SW to S 05 to 15 but W to NW 10 to 20 in the south-west at
first.
VIS : Good but moderate in showers and rain in places in the south.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : Anticyclonic 05 to 15 in the east, reaching 15 in the north-
east where in will become SE 20, otherwise NE to N 15 to 20
but NW to W 05 to 15 in the extreme west, spreading eastwards
in the second half of the period whilst becoming SW 20 to 20.
VIS : Good in the extreme north-west, otherwise moderate in showers
and rain in places.
SEA STATE: 3.0 to 3.5m reaching 4.0m in places in the east, SW swell,
subsiding from the west towards mid-period.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : SE to E 10 to 20 but NE 10 to 20 in the extreme south-west,
spreading to the extreme north-west in the second half of the
period.
VIS : Good in the extreme west, otherwise moderate in showers and
rain in places.
SEA STATE: 3.0m in the extreme south, spreading northwards towards mid-
period whilst reaching 3.5m in the south-east, SW to S swell.
MOZAMBIQUE CHANNEL:
WIND : SW 10 to 15 in the extreme east-central at first, otherwise S
to SE 10 to 15, reaching 20 in the extreme south-east but 25
in extreme north-east.
VIS : Good but moderate in showers and thundershowers in places in
the north.
MADAGASCAR EAST:
WIND : SE 10 to 20, but E to NE 05 to 15 in the south.
VIS : Good but moderate in showers in places.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to SW 10 to 20 reaching 25 in the south-east at first but N
to NW 10 to 15 in the extreme north-west, spreading southwards
and eastwards towards mid-period.
VIS : Good but moderate in showers and rain in places in the south.
SEA STATE: 3.0 to 4.0m SW swell, reaching 4.5 to 5.5m in the south-east
at first, subsiding from the west towards mid-period.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
DATE: 24/04/23 AT 1700 UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE STRONGER THAN AVERAGES GIVEN HERE).
PART 1: WARNING :
NIL.
PART 2: GENERAL SYNOPSYS, 24/04/23 AT 1200 UTC :
- COLD FRONT CF AXIS 30S/67E, 38S/80E MOVING SLOWLY EASTWARD.
- HIGH 1024 NEAR 41S/41E, MOVING SLOWLY EASTWARD WITH A RIDGE 1020
EXTENDING TOWARDS WAM AND WESTERN AMS.
PART 3: FORECAST FOR 24 HOURS FROM 23/04/24 AT 1800 UTC TO 24/04/24 AT 1800 UTC :
WAM (30S/40S,50E/65E) :
SCATTERED SHOWERS MORE FREQUENT OVER NORTHEASTERN.
WIND: SOUTH TO SOUTHEAST 3/5.
SEA : MODERATE TO ROUGH BECOMING ROUGH TO VERY ROUGH AT START OVER
SOUTHERN. SW SWELL 2/3M INCREASING OF 4/5 M OVER
SOUTHERN.
VISI: GENERALLY GOOD
AMS (30S/40S,65E/80E) :
SHOWERS AND THUNDERY SQUALLS WITH CF.
WIND: NORTHWEST 4/5 AHEAD OF CF, TEMPORALLY 6 AT FIRST, DECREASING 3/4
LATER. SOUTH TO SOUTHEAST 3/4 OVER SOUTHWESTERN AREA.
SEA : ROUGH, BECOMING VERY ROUGH OVER FAR SOUTHWESTERN LATER. SW SWELL
2/3M INCREASING 4/5M OVER FAR SOUTHWESTERN LATER.
VISI: POOR TO VERY POOR UNDER PRECIPITATION.
CRO (40S/50S,50E/65E) :
SCATTERED SHOWERS.
WIND: WEST TO SOUTHWEST 3/5 OVER NORTHERN, 6/7 WITH GUSTS OVER SOUTHERN
DECREASING 4/5 LATER.
SEA : VERY ROUGH TO HIGH BECOMING ROUGH BY WESTERN AT END. SW SWELL 5/7M
FROM NORTH TO SOUTH, DECREASING 3/4M OVER FAR WESTERN AT END.
VISI: MODERATE BUT POOR WITH PRECIPITATION.
KER (40S/50S,65E/80E) :
SCATTERED SHOWERS. AT TIMES SNOWY OVER FAR SOUTHERN.
WIND: WESTERLY 3/5 OVER NORTHERN, 6/7 WITH GUSTS OVER SOUTHERN DECREASING
5/6 LATER.
SEA : ROUGH TO VERY ROUGH, BECOMING VERY ROUGH TO HIGH AT START OVER
SOUTHWESTERN. SW SWELL 3/4M, INCREASING 5/7M OVER SOUTHWESTERN AT
START.
VISI: MODERATE BUT POOR WITH PRECIPITATION.