WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII WEST OF 20E.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
17TH OF JUNE 2025 AT 16:00 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 172200 TO 182200 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. CAPE WEST: W to SW 35 in the south-east until mid-period.
2. CAPE EAST: W to NW 35 in the southern half, reaching 40 in the
central-south until mid-period, but SW to W 35 to 40 in
the south-west spreading to the southern central parts by
mid-period, but only W 35 in the north-west from mid-
period where it will be moderating at the end of the
period.
3. MARION FORTIES EAST: NW to W 35 in the central-southern parts while
moving eastwards it will become NW 35 in the
northern parts reaching 40 in the north-west
towards mid-period. It will become SW 35 in the
west reaching 40 in the north-west and central
and southern-central parts towards the end of the
period.
SYNOPTIC CHART 12:00Z
=====================
High 1036 hPa 33s16w, High 1026 hPa 29s64e
Low 962 hPa 55s20e, Low 988 hPa 50s62e
AREA FORECAST:
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ASCENSION (06S/15S, 00E/20W):
WIND : E to SE 05 to 15.
VIS : Good.
SEA STATE: 3.0m in the southern parts, drifting to the north from mid-
period, while subsiding from the south at the end of the
period, with S to SW swell.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 05 to 15, but W to SW 05 to 15 in the east.
VIS : Good.
SEA STATE: 3.0 to 3.5m in the south, with SW swell.
ST HELENA (15S/30S, 00E/20W):
WIND : E to SE 10 to 20, reaching 25 in the central half.
VIS : Good, but moderate to poor in showers and thundershowers in
the central half.
SEA STATE: 3.0 to 4.0m, subsiding in the south and in the north from mid-
period, with S to SE swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 10 to 20 reaching 25 in the northern half, and south-
eastern parts moderating towards the end of the period.
VIS : Good.
SEA STATE: 3.0 to 4.0m subsiding in the south, with S
to SW swell.
TRISTAN (30S/40S, 00E/20W):
WIND : W to SW 15 to 25 in the south-east, but NW to W 15
to 25 in the central-south and south-west, where it will be
reaching 30 and spreading to the south-east towards mid-
period, otherwise anti-cyclonic 05 to 15.
VIS : Good, becoming moderate in showers and rain in the south-west
spreading to the central southern parts towards mid-period.
SEA STATE: 3.0 to 4.0m in the south-east, and south-west where it will be
drifting to the central southern parts by mid-period, and to
the south-east while subsiding from the west at the end of the
period, with SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : Anticyclonic 05 to 15 in the north-west, otherwise W to SW 15
to 25, reaching 35 in the south-east until mid-period, when it
will become S to SE 05 to 15 in the north-east and NW 20 to 30
in the south-west that will be spreading to the central-
southern parts by the end of the period.
VIS : Moderate in showers and rain in places in the south and
eastern parts until mid-period, otherwise good.
SEA STATE: 3.0 to 4.0m, otherwise subsiding in the north-west but
reaching 5.0 to 6.0m in the southern parts, and 7.0m in the
south-east, with SW swell.