Bulletinset for METAREA 7 Edition date (UTC): 2023-09-25 22:59:11 ============================ HIGH SEAS FORECAST ============================ FQZA31 FAPR 251700 WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII. ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE 25th OF SEPTEMBER 2023 AT 17:00 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 VIACAPE 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. TRADES: S to SE 35 in places in the east at first. 2. TRISTAN: NW 35 to 45 in the central parts spreading eastward, moderating towards the end of the period. 3. CAPE WEST: NW 35 in the extreme south-west. 4. CAPE EAST: Cyclonic 35 to 40 in the west spreading to the central parts. SYNOPTIC CHART 12:00Z ===================== Low 35s26e 1006 hPa High 31s05e 1032 hPa High 40s40e 1028 hPa AREA FORECAST: ============== ASCENSION (06S/15S, 00E/20W): WIND : E to SE 10 to 20. VIS : Good. ANGOLA (06S/15S, 00E/00N): WIND : SW 05 to 15 in the east, otherwise S to SE 10 to 20. VIS : Good. SEA STATE: 3.0 to 3.5m S to SE swell in the south, subsiding towards midday. ST HELENA (15S/30S, 00E/20W): WIND : E to NE 10 to 20, but NW 15 to 25 in the south-west reaching 30. VIS : Good, but moderate in showers and rain in the extreme south- west. SEA STATE: 3.0 to 4.0m W to SW swell in the south-west reaching 4.5m, subsiding towards the end of the period. TRADES (15S/30S, 00E/WEST COAST): WIND : S to SE 15 to 25, reaching 35 in places in the east at first. VIS : Good. SEA STATE: 3.0 to 4.0m S to SE swell in the east reaching 4.5m in places. TRISTAN (30S/40Se, 00E/20W): WIND : W to NW 15 to 25 reaching 35 to 45 in the central parts spreading eastward, moderating towards the end of the period. VIS : Good in the north-east, otherwise moderate in showers and rain. SEA STATE: 3.0 to 4.0m NW swell, reaching 5.0 to 6.0m, but 7.0m in the central-southern parts spreading eastward, nut subsiding towards the end of the period. CAPE WEST (30S/40S, 00E/20E): WIND : Anti-cyclonic 05 to 15 reaching 25 to 30 in the extreme east, but 25 to 35 in the extreme south-west. VIS : Good. SEA STATE: 3.0 to 4.0m W to SW swell, becoming 5.0 to 6.0m in the extreme south-west from midday. CAPE EAST (32.5S/40S, 20E/50E): WIND : Cyclonic 20 to 30 in the west, reaching 40 in places in the west spreading to the central parts, otherwise NE 10 to 20. VIS : Good in the east at first, otherwise moderate in showers and thundershowers, but clearing in the extreme west from midday. SEA STATE: 3.0 to 3.5m SW swell in the south-east until mid-morning, otherwise 3.0 to 4.0m E to NE swell reaching 5.0 to 6.0m in places in the west. SE swell in the extreme north-west, becoming 3.5 to 4.5 SW swell from midday. DURBAN EAST (32.5S/25S, EAST COAST/55E): WIND : E to NE 15 to 25, becoming W to SW 20 to 30 in the extreme south-west from mid-morning spreading northward. VIS : Good, but moderate in showers and rain in the south-west. SEAS STATE: 3.0 to 3.5m E to NE swell in places in the south, becoming 4.0 to 5.0m SW swell in the extreme south-west towards the end of the period. MOZAMBIQUE CHANNEL: WIND : E to NE 10 to 20, but SE 10 to 20 in the south-east at first. VIS : Good. MADAGASCAR EAST: WIND : E to SE 10 to 20 in the north, otherwise NE 15 to 25 in the south. VIS : Good in places, otherwise moderate in showers and rain. MARION FORTIES EAST (40S/50S, 35E/50E): WIND : W to NW 15 to 25, but E to NE 15 to 25 in the north-west. VIS : Good, but moderate in showers and rain in the extreme north. SEA STATE: 3.0 to 4.0m SW swell except in the north-west spreading eastward but reaching 4.5m in the south-east at first. AREA 2: ======= MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN) DATE: 23/09/25 AT 1700 UTC: AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE STRONGER THAN AVERAGES GIVEN HERE). PART 1: WARNING: GALE RUNNING OVER CRO AND EXPEXTED OVER KER. PART 2: GENERAL SYNOPSYS, 23/09/25 AT 1200 UTC: LOW 978 NEAR 52S/49E, QUICKLY MOVING NORTH-EASTWARD. HIGH 1030 NEAR 40S/42E, MOVING NORTH-EASTWARD. PART 3: FORECAST FOR 24 HOURS FROM 25/09/23 AT 1800 UTC TO 26/09/23 AT 1800 UTC: WAM (30S/40S,50E/65E): SHOWERS AND SQUALLS IN SOUTH-EAST AT FIRST. WIND: ANTICLOCKWISE 3/5, LOCALLY SW 6 IN FAR SOUTH-EAST. SEA: ROUGH, VERY ROUGH IN SOUTH AT FIRST. SW SWELL 3 TO 5 M. VIS: POOR IN PRECIPITATIONS. AMS (30S/40S,65E/80E): RAIN, SHOWERS AND SQUALLS. WIND: SW 5/7 BECOMING ANTICLOCKWISE 3/4 IN NORTH. SEA: VERY ROUGH. SW SWELL 3 TO 5 M. VIS: POOR TO VERY POOR IN PRECIPITATIONS. CRO (40S/50S,50E/65E): RAIN OR SHOWERS. WIND: WESTERLY 5/7 IN NORTH, 6/7 IN SOUTH LOCALLY 8 IN FAR SOUTH-EAST, DECREASING SW 4/6 IN NORTH-WEST AT END. SEA: VERY ROUGH, BECOMING HIGH IN SOUTH-EAST, AND ROUGH IN NORTH-WEST. W SWELL 3 TO 5 M. VIS: POOR IN PRECIPITATIONS. KER (40S/50S,65E/80E): SHOWERS AND SQUALLS. WIND: SOUTHWEST 5/6, AT TIMES 7, INCREASING W 7/8 FROM WEST SOON. SEVERE GUSTS IN SQUALLS. SEA: ROUGH OR VERY ROUGH, BECOMING HIGH FROM WEST LATER. W SWELL 3 TO 5. VIS: POOR TO VERY POOR IN SHOWERS.