Bulletinset for METAREA 7 Edition date (UTC): 2025-09-17 23:21:34 ============================ HIGH SEAS FORECAST ============================ FQZA31 FAPR 171730 WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII. ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE 17TH OF SEPTEMBER 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 172200 to 182200 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 EAST: W to SW 35 to 40 in the south and south-eastern parts during the first half of the period. 2. MARION FORTIES EAST: W to SW 35 to 40, reaching 45 to 50 in the east and southern parts during the first half of the period. SYNOPTIC CHART 12:00Z ===================== High 1023 hPa 32s09e Low 931 hPa 54s46e, Low 1016 hPa 37s08w 1. Cold Front: 29s44e 30s49e 36s55e 40s59e 44s62e 49s67e 54s71e into 59s64e 59s58e 57s48e 54s46e AREA FORECAST: ============== ASCENSION (06S/15S, 00E/20W): WIND : SE to E 10 to 20. VIS : Good. ANGOLA (06S/15S, 00E/00N): WIND : W to SW 05 to 10 in the east, otherwise S to SE 05 to 15. VIS : Good. ST HELENA (15S/30S, 00E/20W): WIND : Variable 05 to 10 in the central parts, otherwise S to SE 05 to 15, reaching 20 in places in the west. VIS : Good, but moderate in showers and rain in the south, south- east as well as west. TRADES (15S/30S, 00E/WEST COAST): WIND : Variable 05 to 10 in the south-west, otherwise S to SE 15 to 25, reaching 30 in the south-west at times. VIS : Good. SEA STATE: 3.0 to 4.0m in the east and south-east, with S to SE swell. TRISTAN (30S/40S, 00E/20W): WIND : Cyclonic 05 to 15, but S to SW 10 to 20 in the west, becoming SW 15 to 25 in the south-west towards the end of the period. VIS : Good in the west and north, otherwise moderate in showers and rain in places. CAPE WEST (30S/40S, 00E/20E): WIND : S to SE 15 to 25 in the north-east, but SW 05 to 15 in the south-east, otherwise anti-cyclonic 05 to 15. VIS : Good, but moderate in rain and showers in places in the west and southern parts from the afternoon. SEA STATE: 3.0 to 4.0m in the eastern half until in the afternoon, with S to SW swell. CAPE EAST (32.5S/40S, 20E/50E): WIND : W to SW 15 to 25, reaching 30 to 40 in the south and south- eastern parts during the first half of the period. It will become variable 05 to 10 in the west by the end of the period. VIS : Moderate in showers and rain in places, becoming good in the west by the end of the period. SEA STATE: 4.5 to 5.5m, reaching 6.0 to 7.0m in the central, eastern parts, but 8.0 to 8.5m in the south-east until in the afternoon, subsiding to 3.5 to 4.0m in the west from mid- period, with W to SW swell. DURBAN EAST (32.5S/25S, EAST COAST/55E): WIND : Anti-cyclonic 05 to 15, becoming W to NW 10 to 20 in the southern parts from mid-period. VIS : Good, but moderate in showers and thundershowers in places in the east, becoming moderate in showers and rain in the south- west from mid-period. SEA STATE: 3.0 to 4.0m except in the north-east at first, reaching 5.0 to 6.0m in the southern parts, with S to SW swell. MOZAMBIQUE CHANNEL: WIND : N to NE 10 to 20 in the west, otherwise E to SE 05 to 15, reaching 20 to 25 in the south-east from mid-period. VIS : Good. SEA STATE: 3.0 to 4.0m in the south and eastern parts, with SW swell. MADAGASCAR EAST (10S/25S, EAST COAST/55E): WIND : E to NE 05 to 15 in the south, otherwise E to SE 10 to 20, reaching 25 in places in the northern parts. VIS : Moderate in rain and showers in places in the north, otherwise good. SEA STATE: 3.0 to 4.0m in the southern parts towards mid-period, with SW swell. MARION FORTIES EAST (40S/50S, 35E/50E): WIND : W to SW 30 to 40, reaching 45 to 50 in the east and southern parts during the first half of the period. VIS : Moderate to poor in rain and snow-showers. SEA STATE: 7.0 to 9.0m, reaching 10 to 12m in the south and south-eastern parts at first, moderating to 5.5 to 6.5m in the west towards mid-period, as well as central parts by the end of the period, with W to SW swell. AREA 2: ======= MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN) 25/09/17 AT 1700UTC AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE). PART 1: WARNING - LOCAL STORM OVER SOUTH CRO. - STRONG GALE OVER CRO. - GALE OVER KER. PART 2: GENERAL SYNOPSIS, 25/09/17 AT 1200UTC - HIGH 1033 HPA NEAR 33S/85E, EXPECTED 1035 HPA NEAR 33S/91E AT THE END. - LOW 929 HPA NEAR 53S/46E, EXPECTED 950 HPA NEAR 56S/67E AT THE END. WITH COLD FRONT AXIS 30S/49E, 39S/59E , 50S/69E , MOVING QUICKLY EASTWARD. PART 3: FORECAST FOR 24 HOURS FROM 25/09/17 AT 1800UTC TO 25/09/18 AT 1800UTC WAM (30S/40S, 50E/65E) RAIN, THUNDERSHOWERS, FRONTAL SHOWERS, THEN SHOWERS LOC THUNDERSHOWERS. VIOLENT GUSTS NEAR THE FRONT. WIND : NORTH-WESTERLY 5 TO 7 FROM NORTH TO SOUTH AHEAD OF THE FRONT, BACKING WESTERLY 3/5 IN THE NORTH AND 5/6 IN THE SOUTH, REACHING 7 IN THE SOUTHERN QUARTER. SEA : VERY ROUGH TO HIGH, BUT MODERATE TO ROUGH TO THE NORTHEAST AHEAD OF THE FRONT. TEMPORARY NORTH-WESTERLY SWELL 2/4M NEAR THE FRONT, THEN LONG SOUTH-WESTERLY SWELL 4/7M BEHIND. VIS : VERY POOR UNDER PRECIPITATION. AMS (30S/40S, 65E/80E) RAIN, THUNDERSTORMS, FRONTAL SHOWERS OVER THE SOUTH-WESTERN HALF. VIOLENT GUSTS WITH THE FRONT. WIND: NORTH : NORTH TO NORTHWEST 3/5. SOUTH : NW 5/6, REACHING 7 NEAR THE FRONT, DECREASING W TO NW 3/5 BEHIND. SEA : MODERATE TO VERY ROUGH FROM NORTHEAST TO SOUTHEAST. WESTERLY SWELL 3/5M BEHIND THE FRONT. VIS : POOR TO VERY POOR UNDER FRONTAL PRECIPITATION. CRO (40S/50S, 50E/65E) RAIN, SHOWERS AND FRONTAL SQUALLS. SNOW IN THE SOUTH. VIOLENT GUSTS. WIND IN THE NORTH: WESTERLY 7/8, LOCALLY 9 IN THE SOUTH, DECREASING WESTERLY 6/7 AT THE END. IN THE SOUTH: WEST TO NORTHWEST 8/9 SOMETIMES REACHING 10 AT FIRST, DECREASING WESTERLY 7/8 AT END. SEA : HIGH TO VERY HIGH. LONG WESTERLY SWELL 5/9M, BUT NORTH-WESTERLY SWELL 3/5M TO THE EAST AT FIRST. VIS : VERY POOR. KER (40S/50S, 65E/80E) RAIN, SHOWERS AND FRONTAL SQUALLS. SNOW IN THE SOUTH. VIOLENT GUSTS. WIND : NW 6/7, REACHING 8, DECREASING TEMPORARILY 5/6 BEHIND, THEN LATER INCREASING WESTERLY 7/8 OVER THE SOUTHWEST HALF SEA : VERY ROUGH TO HIGH. NORTH-WESTERLY SWELL 3/5M BEHIND THE FRONT, THEN LATER ARRIVAL OF A LONG WESTERLY SWELL 5/9M. VIS :VERY POOR UNDER PRECIPITATION.