Bulletinset for METAREA 7 Edition date (UTC): 2024-04-25 17:17:19 ============================ HIGH SEAS FORECAST ============================ FQZA31 FAPR 251330 WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII. ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE 25th OF APRIL 2024 AT 13:30 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 252200 TO 262200 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. GALE FORCE WARNINGS: ==================== 1. TRISTAN: N to NW 35, except in the east. It will become W to SW 35 to 40 in the south-west from mid-period. 2. CAPE WEST: SE to E 35 in the north-east. 3. MARION FORTIES EAST: SW 35 in the south-east towards the end of the period. SYNOPTIC CHART 12:00Z ===================== High 1032 hPa 39s05e High 1030 hPa 44s67e. Low 988 hPa 42s23w Low 1012 hPa 49s39e. AREA FORECAST: ============== ASCENSION (06S/15S, 00E/20W): WIND : E to SE 15 to 20. VIS : Good. ANGOLA (06S/15S, 00E/00N): WIND : S to SE 10 to 15 but S to SW 05 to 15 in the extreme east at times. VIS : Good but moderate in isolated thundershowers in the north- east. ST HELENA (15S/30S, 00E/20W): WIND : N to NW 15 to 25 in the south-west, otherwise E to SE 10 to 20. VIS : Moderate in showers and rain in places but poor in the south- west. SEA STATE: 3.0m in the extreme south-west, with NW swell. TRADES (15S/30S, 00E/WEST COAST): WIND : S to SE 15 to 25. VIS : Good. SEA STATE: 3.0m in places, with S to SE swell reaching 3.5m in the extreme south-east. TRISTAN (30S/40SE, 00E/20W): WIND : N to NE 10 to 20 in the east, otherwise N to NW 25 to 35. It will become W to SW 20 to 30 in the extreme west from mid- period spreading to the central parts by end of the period while reaching 35 to 40 in the south-west from mid-period. VIS : Good but poor in showers and rain (with embedded thundershowers) in the west spreading to the central parts by mid-period. SEA STATE: 3.5 to 4.5m in the west spreading to the central parts by mid- period reaching 5.0 to 6.0m in the south-west and 6.5 to 7.0m in the extreme south-west from mid-period, with N to NW swell, becoming SW swell in the south-west from mid-period. CAPE WEST (30S/40S, 00E/20E): WIND : Anticyclonic 05 to 15 in the extreme south, otherwise SE to E 15 to 25 reaching 30 to 35 in the north-east but N to NW 15 to 20 in the south-west. VIS : Good. SEA STATE: 3.0 to 4.0m over the north-eastern parts reaching 4.5m from mid-period, with S to SE swell. CAPE EAST (32.5S/40S, 20E/50E): WIND : N to NE 10 to 20 in the extreme north-east, otherwise N to NW 15 to 25 reaching 30 in the extreme south-east but S to SE 15 to 25 over the western and central parts spreading to the eastern parts by the end of the period. VIS : Moderate in showers and rain, becoming good over the western and central parts from mid-period. DURBAN EAST (32.5S/25S, EAST COAST/55E): WIND : E to SE 05 to 15 reaching 20 in the extreme north but S to SW 15 to 25 in the west. VIS : Moderate in showers and rain in places. MOZAMBIQUE CHANNEL: WIND : S to SE 10 to 20. VIS : Good but moderate in showers and thundershowers in the extreme north. It will become moderate in light showers over the central and southern parts from mid-period. MADAGASCAR EAST: WIND : E to SE 10 to 20 but E to NE 10 to 20 in the extreme south- west. VIS : Moderate in showers and thundershowers. MARION FORTIES EAST (40S/50S, 35E/50E): WIND : N to NW 20 to 30 in the east for the first half of the period, otherwise SW 20 to 30 reaching 35 in the south-east towards the end of the period. VIS : Moderate in showers and rain but poor over the eastern parts for the first half of the period. SEA STATE: 3.0 to 4.0m in the south reaching 4.5m in the south-west from mid-period, with mainly SW swell. AREA 2: ======= MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN) DATE: 24/04/25 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, 24/04/25 AT 0000 UTC : - COLD FRONT CF OVER NORTHEASTERN AMS, MOVING SLOWLY NORTHEASTWARD ET LEAVING THE AREA AT END. - HIGH 1026 HPA NEAR 39S/53E, MOVING SOUTHEASTWARD. - COLD FRONT CG AXIS 41S/24E, 62S/39E MOVING NORTHEASTWARD. PART 3: FORECAST FOR 24 HOURS FROM 25/04/24 AT 0600 UTC TO 26/04/24 AT 0600UTC : WAM (30S/40S,50E/65E) : SCATTERED SHOWERS AND SQUALLS OVER WESTERN PART.WIND: EASTERLY 4 TO 5, LOCALLY 6 IN NORTHERN, ANTICLOCKWISE 2 TO 4 IN SOUTH. GUSTS.SEA: ROUGH TO VERY ROUGH, BECOMING MODERATE TO ROUGH AT FIRST FROM SOUTHWESTERN. SW SWELL 3 TO 4 METERS ABATING.VISI: POOR UNDER PRECIPITATIONS. AMS (30S/40S,65E/80E) : FRONTAL SHOWERS OVER NORTHERN PART. SQUALLS.WIND: NORTHWEST 3 TO 4 OVER NORTHEASTERN, BACKING EAST TO SOUTHEAST BEHIND THE FRONT. GUSTS.SEA: ROUGH TO VERY ROUGH. SW SWELL 2 TO 5 METERS.VISI: POOR TO VERY POOR UNDER PRECIPITATIONS. CRO (40S/50S,50E/65E) : SHOWERS OVER WESTERN.WIND: WEST OR VARIABLE 2 TO 4 INCREASING NORTHERLY 4 TO 5 OVER SOUTHWESTERN SOON, 4 TO 6 LATER AND LOCALLY 7 OVER FAR SOUTHWESTERN AT END AHEAD COLD FRONT CG.SEA: ROUGH TO VERY ROUGH OVER NORTHEASTERN BECOMING MODERATE FROM SOUTHWESTERN, THEN LOCALLY ROUGH OVER FAR SOUTHWESTERN AT END. SW WELL 2 TO 3 METERS.VISI: MODERATE OR POOR UNDER SHOWERS. KER (40S/50S,65E/80E) : SCATTERED SHOWERS.WIND: SOUTHWESTERLY 3 TO 5 LOCALLY 6 OVER SOUTHEASTERN, BECOMING ANTICLOCKWISE 2 TO 4 BY WESTERN AREA.SEA: VERY ROUGH TO LOCALLY HIGH OVERNIGHT, ROUGH TO VERY ROUGH IN THE DAYTIME. SW SWELL 4 TO 6 METERS ABATING.VISI: MODERATE UNDER SHOWERS.