Marine Weather for HS 015

weather bulletin for the high seas for Metarea VII. East of 20e. Issued by the South African Weather Service on the 18th of June 2019 at 17:30 UTC.

For south-east 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 182200 to 192200 utc:

Wind in knots, wave heights in meters. 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. These estimates of winds and waves do not take into account the enhancing effects of the Agulhas Current off the South African East Coast.

Gale force warnings: ==================== 1. Durban east: E to se 35. 2. Marion forties east: NW 35.

Synoptic situation 12:00z: ========================== high 1028 hpa 40s35e high 1020 hpa 25s07e. Low 976hpa 44s01e low 948 hpa 54s04e

1. Cold front: 32s02w 35s06e 40s11e 45s14e 50s15e 55s11e into 54s04e

Area forecast ============== cape east (32.5s/40s, 20e/50e) wind : NE to N 20 to 30 in the west, otherwise S to se 20 to 30 in the east reaching 35 but NW 20 to 30 in the west from mid- period. Vis : good but moderate in rain and showers in the South West. Sea state: 3.0 to 4.0m, SW swell but variable at times in the west.

Durban east: wind : NE 15 to 25 in the South West, otherwise E to se 20 to 30 reaching 35 in the central parts. Vis : good but moderate in showers and rain in the North East. Sea state: 3.0 to 4.0m, SW swell.

Mozambique channel: wind : S to se 15 to 25 reaching 30 in places towards the end of the period. Vis : good but moderate in showers and rain in places.

Madagascar east: wind : se to E 15 to 25 in the north but NE 15 to 25 in the south. Vis : moderate in showers in places. Sea state: 3.0m, se swell but SW swell in the South.

Marion forties east (40s/50s, 35e/50e): wind : NW 20 to 30 reaching 35. Vis : good. Sea state: 3.0 to 4.0m reaching 5.0 to 5.5m, W to SW swell.

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

Date: 19/06/18 at 1700 UTC

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

Part 1: warning : - strong gale force 9 over cro and ker.

Part 2: general synopsys, 19/06/18 at 1200 UTC : - high 1032 hpa near 42s/34e, moving eastward 20/30 kt. - Low 968 hpa near 54s/62e, moving north-eastward 15/20 kt with cold front axis 38s/41e, 40s/50e, 41s/55e, 44s/60e, 45s/62e, 48s/69e, 50s/70e.

Part 3: forecast for 24 hours from 18/06/19 at 1800 UTC to 19/06/19 at 1800 UTC :

Wam (30s/40s,50e/65e) :frontal showers over southern. Wind:variable 2/4 in north, elsewhere W 5/6 ahead the front backing S 5/7 behind. Then, anticlockwise 3/5 from west later. Sea :rough in north, very rough to high in south. Heavy SW swell abating. Visi:poor under precipitations.

Ams (30s/40s,65e/80e) :frontal showers. Wind:increasing NW 5/6 locally 7 ahead the front backing SW 6/7 behind. Sea :very rough to rough, very rough to high in south. Moderate to heavy SW swell. Visi:poor under precipitations.

Cro (40s/50s,50e/65e): frontal rain and snow over north-eastern, then showers behind. Wind:sw 6/7 locally 8/9 in south, decreasing anticlockwise 3/5 in north and W 6/7 in south. Sea :high to very rough. Heavy SW swell. Visi:poor.

Ker (40s/50s,65e/80e):frontal rain and snow. Wind:nw 7/8 locally 9 ahead the front backing W then SW 7/8 locally 9 behind. Sea :high. Heavy southwest swell. Visi:poor.

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