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 28th August 2014 at 08:30 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 281000 to 291000 utc:

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

Gale warnings: ============== 1. Cape east: W to SW 35 in places in the west. 2. Durban east: SW 35 in the west by the second half of the period.

Synoptic situation at 06:00z: ============================= high 1030 hpa 31s05w high 1026 hpa 42s60e. Low 992 hpa 45s25e low 1006 hpa 34s31e low 974 hpa 56s32e.

1. Cold front: 30s14e 35s20e 40s24e into 45s25e. 2. Cold front: 35s30e 40s33e 45s35e 50s36e into 56s32e. 3. Cold front: 25s33w 30s31w 35s29w into 44s35w into 52s18w into 65s08w.

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

Cape east (32.5s/40s, 20e/50e) wind : NE to N 15 to 25 in the extreme east, otherwise W to SW 20 to 30 reaching 35 in places but cyclonic 25 to 30 in the eastern interior. Vis : moderate in showers and rain, except in the extreme east. Sea state: 3 to 4m, reaching 4.5 to 7m in the west, with SW swell in the west but se swell in the east.

Durban east (25s/32.5s, East Coast/55e) wind : S to se 05 to 10 in the extreme South-West at first, otherwise NE to N 20 to 30. It will become SW to NW 25 to 35 in the west by the second half of the period. Vis : good, but moderate to poor in showers in the South-West, spreading east and north-eastwards, affecting the western half by the second half of the period. Sea state: 2.5 to 4m, reaching 5 to 7m in the South-West and extreme west, with se swell.

Mozambique channel: wind : SW to NW 10 to 15 in the extreme east, otherwise NE to N 15 to 25 but se to E 15 to 25 in the extreme North-East. It will become NW 15 to 20 in the extreme south by the end of the period. Vis : good. Sea state: 2.5m in places, se swell.

Madagascar east: wind : E to NE 10 to 20 in the extreme south, otherwise S to se 15 to 25, reaching 30. Vis : good, but moderate in showers and rain in the North. Sea state: 2.5 to 3m, with SW swell.

Marion forties east: (40s/50s, 35e/50e) wind : NW to W 15 to 25 in the South-West, otherwise N to NE 15 to 25 reaching 30. It will become cyclonic 15 to 25 in the north-west and west by the second half of the period. Vis : good becoming moderate with showers in the north by the second half of the period. Sea state: 3.5 to 4.5m, with W to NW swell.

Area 2: =======

Marine meteorological bulletin from Meteo-France/La Reunion on area ack (amsterdam-Crozet-kerguelen)

Date: 14/08/28 at 0500utc

Averaged wind speed on Beaufort scale. (Wind gusts may be about 40% stronger than the averages given here.).

Part 1: warning : nil.

Part 2: general synopsys, 14/08/28 at 0000 UTC : filliing low 1010 hpa near 34s/68e, almost stationnary with cold front axis 37s/70e, 35s/79e, 33s/86e. High 1026 hpa near 44s/59e, moving east-north-eastward 10/15 kt.

Part 3: forecast for 24 hours from 14/08/28 at 0600 UTC to 14/08/29 at 0600utc : wam (30s/40s,50e/65e) : scattered showers. Wind : easterly to south-east 4/5 veering- North-East to north over western area in first part of period. Sea : moderate. Vis : good.

Ams (30s/40s,65e/80e) : showers under the front. Wind : southern of 35s, south-east 4/6 ad clockwise over northern area then setting up S to se 4 to 6 over all area. Sea : moderate to rough. Vis : poor in precipitations.

Cro (40s/50s,50e/65e) : showers over south-western area in second part of period. Wind : anticlockwise 3/4, setting-up N then NW 4/6 by western area. Sea : moderate. Moderate NW swell over western area. Vis : poor under precipitations.

Ker (40s/50s,65e/80e) : scattered showers. Wind : South-West 4/6 veering westerly 3/5 over western area in second part of period. Sea : moderate. Moderate southerly swell abating. Vis : good.

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