securite: ========= weather bulletin for coastal waters up to 50 nautical miles seaward. Issued by the South African Weather Service on the 05th December 2013 at 13:00 UTC.
Forecast valid from 062200 to 072200 utc:
Wind in knots, wave heights in metres. No sea state given if waves less than 2m.
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.
These estimates of winds and waves do not take into account the enhancing effects of the Agulhas Current off the South African East Coast.
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.
Alerts: ------- warnings: --------- 1. Moderate to poor visibility in fog patches and showers and rain is expected between Walvis Bay and stilbaai, spreading north-eastwards, reaching Maputo on Saturday. 2. Heavy sw`ly swell in excess of 4m is expected between luderitz and east London, spreading northwards, reaching durban on Saturday, while subsiding west of Plettenberg Bay.
Watches: --------- 1. Gale force se`ly winds of 35kt are expected between Cape Agulhas and cape Columbine.
Advisories: ----------- nil.
Abnormal wave conditions: ========================= nil.
Cunene River to Walvis Bay: wind : NW to W 05 to 15 in the south but S to SW 15 to 25 in the north. Vis : moderate to poor in fog patches in the south, spreading northwards. Sea state: 2.5 to 3m, SW swell.
Walvis Bay to Orange River: wind : se to E 15 to 25 by the first half of the period, otherwise W to NW 10 to 20. Vis : good becoming moderate to poor in fog patches by the second half of the period. Sea state: 2.5 to 4.5m, SW swell.
Orange River to cape agulhas: wind : se to E 15 to 25, becoming W to NW 10 to 20 north of cape Columbine by the second half of the period. Vis : good becoming moderate to poor in showers north of cape Columbine by the second half of the period. Sea state: 2.5 to 5m, mainly long period SW swell.
Cape Agulhas to east london: wind : SW to W 15 to 25 becoming se to E 15 to 25, reaching 30 to 35 west of stilbaai by the second half of the period. Vis : good but moderate to poor in showers and fog patches between stilbaai and Cape Agulhas by the first half of the period. Sea state: 2.5 to 4.5m, long period SW swell.
East London to Maputo: wind : S to se 15 to 25, becoming NE 05 to 15 by the end of the period. Vis : moderate to poor in rain and showers, clearing by the end of the period. Sea state: 2.5 to 4.5m, SW swell.
Mozambique channel: wind : S to se 15 to 25 in the South-West, otherwise cyclonic 05 to 15. Vis : moderate in showers and thundershowers. Sea state: 2.5 to 3.5m in the south, reaching 4m by the end of the period, long period SW swell.
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NOT FOR NAVIGATION. DO NOT RELY ON THIS DATA FOR DECISIONS THAT CAN RESULT IN HARM TO ANYONE OR ANYTHING.