Bulletinset for METAREA 7 Edition date (UTC): 2025-08-21 00:08:41 ============================ HIGH SEAS FORECAST ============================ FQZA31 FAPR 201730 WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII. ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE 20TH OF AUGUST 2025 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 202200 to 212200 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. CAPE WEST: W to SW 35 in the south-west towards mid-period, spreading to the south-east towards the end of the period. 2. CAPE EAST: W to SW 35 in the west, but N to NW 35 to 40 in the south and east at first. 3. MARION FORTIES EAST: N to NW 35 to 40 in the west towards mid- period, drifting to the south-east towards the end of the period. SYNOPTIC CHART 12:00Z ===================== High 1023 hPa 23s03e, High 1031 hPa 33s64e Low 987 hPa 47s21e, Low 1006 hPa 41s46e 1. Cold Front: 32s12e 35s17e 40s21e into 47s21e 2. Cold Front: 31s38e 35s43e into 41s46e AREA FORECAST: ============== ASCENSION (06S/15S, 00E/20W): WIND: E to SE 10 to 20. VIS : Good. ANGOLA (06S/15S, 00E/00N): WIND: S to SE 05 to 15, but SW 05 to 10 in the east. VIS : Good. ST HELENA (15S/30S, 00E/20W): WIND: SW 10 to 20 in the south-east at first, otherwise S to SE 05 to 15 reaching 20 in the south-west but anticyclonic 05 to 15 in the north. VIS : Good, but moderate in showers and rain in the central and the south-eastern parts. TRADES (15S/30S, 00E/WEST COAST): WIND: S to SE 10 to 20, but anticyclonic 05 to 15 in the south-west until mid-period. VIS : Good, but moderate in rain and showers in the south and south- west. TRISTAN (30S/40S, 00E/20W): WIND: W to SW 10 to 20, reaching 25 to 30 in the south-east. It will become anticyclonic 05 to 15 in the west towards the end of the period. VIS : Moderate in showers and rain, becoming good from the south- west towards mid-period. SEA STATE: 3.0 to 3.5m in the southern half, reaching 4.0 to 5.0m in the south, with SW swell. CAPE WEST (30S/40S, 00E/20E): WIND: Variable 05 to 10 in the extreme north-east, otherwise W to SW 10 to 20, reaching 25 to 30 in the southern parts, but 35 in the south-west towards mid-period, spreading to the south-east towards the end of the period. VIS : Moderate to poor in showers and rain in places, except in the north-east. SEA STATE: 3.0 to 3.5m in the southern half, reaching 4.0 to 5.0m in the south, with W to SW swell. CAPE EAST (32.5S/40S, 20E/50E): WIND: W to SW 10 to 20 in the central parts reaching 25 to 35 in the west, otherwise N to NW 15 to 25 reaching 30 to 40 in the south and east at first. VIS : Moderate to poor in showers and thundershowers in places. SEA STATE: 3.0 to 3.5m, except in the north, reaching 4.0 to 6.0m in the west, spreading over the central parts towards mid- period with W to SW swell. DURBAN EAST (32.5S/25S, EAST COAST/55E): WIND: NW 10 to 20 in the south-east, otherwise E to NE 10 to 20, but SW 10 to 20 in the south and west, reaching 25 to 30 in south- west until mid-period. VIS : Good, but moderate in showers and thundershowers in the east and south-east. SEA STATE: 3.0m in the south and west, with S to SW swell. MOZAMBIQUE CHANNEL: WIND: Variable 05 to 10 in the southern parts, otherwise S to SE 05 to 15 reaching 20 in the north-east, but N to NW 10 to 20 in the south-west. VIS : Good. MADAGASCAR EAST (10S/25S, EAST COAST/55E): WIND: E to SE 10 to 20 reaching 25 in the north-west, but variable 05 to 10 in the south. VIS : Moderate in showers and rain in places. MARION FORTIES EAST (40S/50S, 35E/50E): WIND: Cyclonic 20 to 30 in the north-east, otherwise N to NW 15 to 25 reaching 30 to 40 in the west towards mid-period, drifting to the south-east towards the end of the period. VIS : Good, but moderate to poor in rain and showers in the north- east and west, spreading to the east and south-east towards the end of the period. SEA STATE: 3.0 to 4.0m, reaching 4.5 to 5.5m in the west towards mid- period, with W to NW swell. AREA 2: ======= MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN) 25/08/20 AT 1600UTC AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE). PART 1: WARNING - GALE OVER KER. PART 2: GENERAL SYNOPSIS, 25/08/20 AT 1200UTC - HIGH 1031 HPA NEAR 33S/64E MOVING SLOWLY EASTWARD. - WAVING FRONT OVER WEST OF WAM AND OVER CRO WITH LOW 1007 HPA NEAR 41S/47E, EXPECTED OVER WAM, CRO AND KER AT END. PART 3: FORECAST FOR 24 HOURS FROM 25/08/20 AT 1800UTC TO 25/08/21 AT 1800UTC WAM (30S/40S, 50E/65E) FRONTAL RAIN AND SHOWERS BY WEST LATER. WIND: ANTICLOCKWISE 3 TO 5 INCREASING NORTHERLY 6/7 WITH FRONT. SEA : MODERATE TO ROUGH. VIS : POOR UNDER PRECIPITATION. AMS (30S/40S, 65E/80E) SCATTERED SHOWERS. WIND: ANTICCLOCKWIZE 3 TO 5. SEA : ROUGH BECOMING MODERATE BY WEST. SSW SWELL 3 M DECREASING. VIS : MODERATE UNDER SHOWERS. CRO (40S/50S, 50E/65E) RAIN AND FRONTAL SHOWERS, SQUALLS. WIND: WESTERLY 6/7, BECOMING ANTICLOCKWISE 3 TO 5 OVER SOUTH OF FRONT, INCREASING NORTHERLY 7 OVER NORTHWESTERN AT END. GUSTS OF SQUALLS. SEA : ROUGH TO VERY ROUGH. WESTERLY SWELL 3 TO 4 M OVER SOUTHEASTERN. VIS : POOR UNDER PRECIPITATION. KER (40S/50S, 65E/80E) RAIN AND FRONTAL SHOWERS. WIND: WESTERLY 6 TO 8 FROM NORTH TO SOUTH AREA, DECREASING 5 TO 7 LATER. BECOMING ANTICLOCKWISE 3 TO 5 OVER FAR WESTERN AREA AT END. SEA : ROUGH TO VERY ROUGH, BECOMING LOCALLY HIGH OVER FAR SOUTHERN. SOUTH-WEST SWELL INCREASING 3 TO 5 M. VIS : POOR UNDER PRECIPITATION.