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weather bulletin for the high seas for Metarea VII. West of 20e
issued by the South African Weather Service on the
07th of October 2008 at 17:15 UTC.
For southeast 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 072200 to 082200 UTC.
Wind in knots, wave heights in metres. 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 warning(s):
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1. Tristan : N to NW 35 in the south-east first half of period.
Synoptic situation at 061200 UTC
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high 1030 hpa 36s05e high 1034 hpa 38s52e
low 984 hpa 47s07w low 1016 hpa 48s34e low 958 hpa 67s45e
1. Cold front: 37s13w 40s05w 45s01w 50s02w 47s07w
2. Cold front: 46s25e 47s35e 48s34e 55s40e 60s46e 65s49e 67s45e
Area forecast
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Ascension (06s/15s, 00e/20w)
wind : S to SW 05 to 10 in the North-East, otherwise se 15 to 20.
Vis : good.
Angola (06s/15s, 00e/west coast)
wind : se 15 to 20 in the South-West, otherwise S to SW 10 to 15 but
W to NW 05 in the east.
Vis : good.
St Helena (15s/30s, 00e/20w)
wind : NE to NW 10 to 15 in the South-West, otherwise E to se 15 to 25.
Vis : good.
Sea state: 2.5 to 3.5m, with S to se swell.
Trades (15s/30s, 00e/west coast)
wind : S to se 15 to 25 becoming 30 in the central and
south-eastern parts.
Vis : good.
Sea state: 2.5 to 3.0m in the North-East, with S to se swell.
Tristan (30s/40s, 00e/20w)
wind : NW to SW 15 to 25, becoming variable 05 to 10 over the
central and north-eastern parts.
Vis : good becoming poor in rain and showers in the South-West
end of period.
Sea state: 4 to 5m in the South-West, spreading eastwards at first,
otherwise 2.5 to 3.5m, NW to W swell.
Cape west (30s/40s, 00e/20e)
wind : NW to SW 15 to 25 in the South-West, but variable 05 to 10 in
the central to North-Western parts, otherwise S to se 15 to 25.
Vis : moderate in showers in the east at first.
Sea state: 2.5 to 3m in the east reaching 4m in the extreme east at
first, se swell.
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