Marine Weather for HS 015

Forecast
========= weather bulletin for the high seas for Metarea VII. East of 20e. Issued by the South African Weather Service on the 19th December 2014 at 17:30 UTC.

For southeast 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: ====== forecast valid from 192200 to 202200 utc:

Wind in knots, wave heights in metres. No sea state given if waves less than 3m.

Gale warnings: ============== 1. Marion forties east: NW to W 35 in places in the first period.

Synoptic situation at 12:00z ============================ high 1024 hpa 35s03w. Low 966 hpa 53s11w low 966 hpa 47s16w low 972 hpa 54s22e low 968 hpa 54s34e.

1. Cold front: 45s28e 50s37e 54s35e.

Area forecast: ============== cape east (32.5s/40s, 20e/50e) wind : NW to SW 10 to 20, reaching 25 to 30 in the south. Vis : good but moderate in showers and rain in the south. Sea state: 3.5 to 4.5m, reaching 5.0m in the south, with W to SW swell.

Durban east (25s/32.5s, East Coast/55e) wind : variable 05 to 10 in the south-east at first, otherwise E to NE 10 to 20 becoming se 10 to 20 in the South-West in the second period. Vis : good but moderate in showers in the South-West. Sea state: 3.0m in the south by mid period, with W to SW swell.

Mozambique channel: wind : variable 05 to 10 in the western parts, otherwise N to NW 05 to 15 in the north spreading southwards but E NE 10 in the south becoming NE 10 in the second period. Vis : moderate in showers in places at times.

Madagascar east: wind : E to se 05 to 15 in the south, otherwise N to NE 05 to 15 but NW 05 to 10 in the extreme north-west. Vis : good but moderate in showers in places in the North.

Marion forties east: (40s/50s, 35e/50e) wind : NW to W 25 to 35 becoming SW 15 to 25 from the west in the second period. Vis : moderate in showers with possible snowfalls in the second period. Sea state: 4.5 to 5.5m, reaching 6.0m in the south, with W to SW swell.

Area 2: ======= marine meteorological bulletin from Meteo-France/La Reunion on area ack (amsterdam-Crozet-kerguelen)

Date: 14/12/19 at 1700 UTC

Averaged wind speed on Beaufort scale. (Wind gusts may be stronger than averages given here).

Part 1: warning : - gale force 8 over cro and ker.

Part 2: general synopsys, 14/12/19 a 1200 UTC : - cold front cf axis : 39s/39e, 40s/52e, 45s/67e, 50s/72e, moving eastward 35/40 kt. - Cold front cg axe : 25s/44e, 23s/55e, 25s/63e, 30s/66e, 31s/64e, associated a low 1006 hpa filling near 30s/65e, moving southeastward 15/20 kt. - New front over southwestern cro in end of validity. - Highs 1015 hpa near 32s/50e and near 40s/49e, moving eastward slowly.

Part 3: forecast for 24 hours from 14/12/19 at 1800 UTC to 14/12/20 at 1800 UTC :

Wam (30s/40s,50e/65e) : frontal rain and showers. Wind : anticlockwise 3 to 5 but NW 3/4 ahead cf over southeastern area and southerly 5/6 over northeastern area, setting up NW 5/6 over southwestern area in end of validity. Sea : moderate to rough. Moderate South-West swell by southwestern area. Vis : poor in precipitations.

Ams (30s/40s,65e/80e) : frontal rain and showers, squalls. Wind : over northwestern area : clockwise 5 to 7 decreasing 4 to 6, gusts under squalls, southeastern area : northerly 3/4. Sea : moderate to rough. Moderate clockwise swell over northwestern area, moderate SW swell over southwestern area. Vis : poor in precipitations.

Cro (40s/50s,50e/65e) : showers, frontal rain over southwestern area in end of validity. Wind : over northern area : anticlockwise 3 to 5 setting up northerly 5/6, over southern : westerly 7/8 veering northerly 7/8 in vicinity of new front. Sea : moderate to very rough from north to south area. Moderate westerly swell. Vis : poor in precipitations.

Ker (40s/50s,65e/80e) : frontal rain and showers. Wind : north-west 6/7 ahead cf backing westerly 7/8 behind over southern area and anticlockwise 3 to 5 over northern area, setting up northerly 5/6 over western area in end of validity. Sea : rough to very rough becoming moderate to rough. Moderate to heavy southwest swell. Vis : poor in precipitations.

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