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weather bulletin for the high seas for Metarea vii: east of 20e
issued by the South African Weather Service on the
22nd of March 2010 at 08:30 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 221000 to 231000 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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nil
Synoptic situation at 06:00 UTC
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high 1024 hpa 43s19w high 1026 hpa 36s02e high 1034 hpa 40s54e
low 1010 hpa 45s05w low 994 hpa 55s22e low 998 hpa 52s35e
low 1010 hpa 38s28e
Area forecast:
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cape east (32.5s/40s, 20e/50e)
wind : NE to N 20 to 30 but NW to SW 20 to 30 in the west spreading to 35e,
becoming se 15 to 20 from the west.
Vis : moderate in rain and showers.
Sea state: 3.0 to 3.5m, mainly SW swell in the east, variable swell direction in the west.
Durban east (25s/32.5s, East Coast/55e)
wind : se 20 to 30 in the east, otherwise NE 20 to 30 but se 15 to 20 in the extreme
north-west by the end of the period.
Vis : moderate to poor in showers and thundershowers.
Sea state: 3 to 4m, mainly SW swell but E in the extreme west.
Mozambique channel:
wind : S to se 05 to 15 in the north, otherwise variable 10.
Vis : moderate to poor in showers and thundershowers.
Madagascar east:
wind : E to se 10 to 15 but NE 20 to 25 in the south.
Vis : poor in showers and thundershowers, heavy in the south.
Sea state: 3.0 to 3.5m in the extreme south, mainly SSW swell becoming E by the
end of the period.
Marion forties east: (40s/50s, 35e/50e)
wind : N to NW 20 to 30 reaching 35 at times becoming SW 20 to 30 in the west by morning.
Vis : moderate to poor in rain and showers clearing from the west by end of the period.
Sea state: 3.0 to 4.0m, mainly SW swell but NW from the west by the end of the period.
Area 2:
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marine meteorological bulletin from Meteo-France/La Reunion on area ack
(amsterdam-Crozet-kerguelen)
Date : 10/03/22 UTC time : 0600
Averaged wind speed on Beaufort scale
wind gusts may be about 40% stronger than the averages given here.
Part 1:
warning : gale force 8 expected over cro and ker.
Part 2:
general synopsis, 10/03/22 at 0000 UTC :
cold front cf axis 27s/61e, 35s/78e, 43s/86e, leaving area.
High 1036 hpa near 42s/50e, moving eastward 5 kt.
Cold front cg axis 47s/33e, 50s/50e, 55s/59e, 60s/57e, moving eastward 45 kt.
Part 3:
forecast for 24 hours from 10/03/22 at 0600 UTC to 10/03/23 at 0600 UTC :
Wam (30s/40s,50e/65e) : scattered showers.
Wind : northern 35s: E 5/6. Southern 35s: anticlockwise 3/4.
Sea : rough. Moderate southwesterly swell weakening.
Vis : moderate in showers.
Ams (30s/40s,65e/80e) : rain in cf then showers.
Wind : N-W 4/5 ahead cf over far eastern area, backing S 5/7 behind, then S-E 6
northern 35s in second part and anticlockwise 3/4 southern.
Sea : rough. Moderate southwesterly swell weakening.
Vis : poor in rain and showers.
Cro (40s/50s,50e/65e) : rain and showers in cg over far southern area.
Wind : northern 45s: anticlockwise 3/4. Southern 45s: W 5/6, reaching 7/8 over
far southern area in vicinity of cg, then veering N-W 6/7 by western area at end.
Sea : very rough to high decreasing. Moderate southwesterly swell weakening.
Visi : poor in rain and showers.
Ker (40s/50s,65e/80e) : showers, then rain in cg over far southern area.
Wind : S-W 5/7, veering W 5/6, reaching 7/8 over far southern area in vicinity of cg,
decreasing 4/5 by western area at end.
Sea : rough to very rough. Moderate southwesterly swell.
Vis : poor in rain and showers.=