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 22nd September 2014 at 16:30 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 222200 to 232200 utc:

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

Gale warnings: ============== 1. Cape east: E to NE 35 in places in the west. 2. Durban east: NE reaching 35 in places in the extreme west. 3. Marion forties east: NW reaching 35 in the south during the first half of the period.

Synoptic situation at 12:00z: ============================= high 1030 hpa 43s44e. Low 974 hpa 47s14w low 1010 hpa 34s16e.

1. Cold front: 25s31w 30s24w 35s17w 40s10w 47s14w.

Area forecast: ==============

Cape east (32.5s/40s, 20e/50e) wind : E to NE 10 to 20, reaching 30 to 35 in the north-west, becoming W to SW 10 to 20 in the extreme west at the end of the period. Vis : good becoming moderate in showers and rain in the north-west at the end of the period. Sea state: 3.0 to 3.5m, reaching 4.0m, S to SW swell, becoming E to NE swell in the west.

Durban east (25s/32.5s, East Coast/55e) wind : E to se 10 to 20, but NE 15 to 25 in the extreme west, reaching 35 in places and spreading eastwards. Vis : good. Sea state: 3.0 to 3.5m, SW swell.

Mozambique channel: wind : S to se 10 to 20, reaching 30 in the south-east. Vis : good, but moderate in showers in places in the North. Sea state: 3.0 to 3.5m in the south, reaching 4.0m at first, S to SW swell.

Madagascar east: wind : se 10 to 20. Vis : moderate in showers in places, otherwise good. Sea state: 3.0m in the extreme south, SW swell.

Marion forties east: (40s/50s, 35e/50e) wind : SW to NW 20 to 30, reaching 35 in the south in the first half of the period, moderating from the west. Vis : good. Sea state: 3.0 to 3.5m, reaching 4.0 to 4.5m in the extreme south-east, S to SW swell.

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

Date: 14/09/22 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 ams, cro and ker.

Part 2: general synopsys, 14/09/22 a 1200 UTC :

- waving cold front cf axis : 28s/58e, 32s/65e, 35s/75e, 37s/85e moving ENE 10/15 kt.

- Low 1004hpa near 39s/63e, with waving cold front cg axis : 33s/55e, 40s/64e, 43s/70e, 43s/75e, 44s/80e moving eastward 20/25 kt.

- High 1031 hpa near 44s/45e, moving eastward 15/20 kt.

Part 3: forecast for 24 hours from 14/09/22 at 1800 UTC to 14/09/23 at 1800 UTC :

wam (30s/40s,50e/65e) :frontal rain and showers in cf and cg.

Wind: S 5/6 becoming anticlockwise 3 to 5 by west.

Sea : moderate. Moderate to heavy SW swell.

Vis : poor under precipitations.

Ams (30s/40s,65e/80e) :frontal rain and showers in cf and cg.

Wind: NW 4 to 6 increasing 6/7 ahead cg, temporarilly clockwise 6/8 over southern area and setting up SW to S behind.

Sea : rough to very rough. Moderate to heavy SW swell .

Vis : poor in precipitations.

Cro (40s/50s,50e/65e) :frontal rain and showersin cg then scattered showers.

Wind: westerly 5 to 8 from north to south.

Sea : rough to very rough. Heavy SW swell abating.

Vis : poor in precipitations.

Ker (40s/50s,65e/80e) :frontal rain and showers in cg.

Wind: backing S to SW 5/6 behind cg then veering westerly 5 to 8 from north to south in second part of period.

Sea : rough to very rough. Heavy westerly then SW swell abating.

Vis : poor in precipitations.

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