Bulletinset for METAREA 7 Edition date (UTC): 2023-05-29 11:57:24 ============================ HIGH SEAS FORECAST ============================ FQZA31 FAPR 290830 WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII. ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE 29th OF MAY 2023 AT 08:30 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 291000 to 301000 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: S to SE 35 to 40 in places in the north-east. 2. CAPE EAST: S to SE 35 in the central parts spreading eastward as well as SE 35 in the extreme north-west from this evening. 3. MARION FORTIES EAST: N to NW 35 in the east at first, otherwise S to SW 35 to 40 in the central parts spreading eastward. SYNOPTIC CHART 06:00Z ===================== Low 23s08e 1010 hPa High 34s01w 1030 hPa Cold Front 1: 18s07e, 20s10e into 23s08e (1010 hPa). Cold Front 2: 39s40e, 45s44e, 50s48e cont. 55s54e into 62s52e (950 hPa). AREA FORECAST: ============== ASCENSION (06S/15S, 00E/20W): WIND : SE 10 to 20. VIS : Good. SEA STATE: 3.0m S swell in the extreme south-east from midnight. ANGOLA (06S/15S, 00E/00N): WIND : S to SE 10 to 20, but W to SW 10 to 20 in the extreme east. VIS : Good. SEA STATE: 3.0 to 3.5m S swell in the extreme south from midnight spreading northward. ST HELENA (15S/30S, 00E/20W): WIND : E to SE 15 to 25, but N to NE 15 to 20 in the extreme south- west spreading eastward from midnight. VIS : Good. SEA STATE: 3.0 to 4.0m S to SW swell in the east reaching 4.5 to 5.0m until midnight, subsiding at the end of the period. TRADES (15S/30S, 00E/WEST COAST): WIND : Cyclonic 15 to 25 in the central parts until midnight, otherwise S to SE 15 to 25. VIS : Good, but moderate in showers and rain in places in the south, clearing from midnight. SEA STATE: 3.0 to 4.0m S to SW swell, but SE swell in the south reaching 5.0m until this evening, subsiding to 3.0 to 3.5m at the end of the period. TRISTAN (30S/40Se, 00E/20W): WIND : Anti-cyclonic 05 to 15 in the north-east reaching 20 in places and spreading north-eastward, otherwise N to NW 10 to 20 reaching 25 in the south-west. VIS : Good, but moderate to poor in showers and rain in the extreme south-west from midnight. SEA STATE: 3.0 to 4.0m W to SW swell in the south-west reaching 4.5m spreading eastward. CAPE WEST (30S/40S, 00E/20E): WIND : S to SE 10 to 20 reaching 30 to 40 in places in the north- east, but W to SW 10 to 20 in the extreme south. VIS : Good, but moderate in showers and rain in the north-east, spreading southward. SEA STATE: 3.0 to 4.0m S to SE swell in the north-east reaching 4.5 to 5.0m. It will become 3.0 to 4.0m SW swell in the extreme south-west towards the end of the period. CAPE EAST (32.5S/40S, 20E/50E): WIND : N to NW 10 to 20 in the north-east until midnight, otherwise S to SE 15 to 25 reaching 35 in the central parts spreading eastward. It will become anti-cyclonic 10 to 20 towards the end of the period, but SE 25 to 35 in the extreme north-west. VIS : Good, but moderate in showers and rain in the east and extreme north-west, clearing in the east by midnight, but spreading southward in the north-western parts. SEA STATE: 3.0 to 4.0m W to SW swell. DURBAN EAST (32.5S/25S, EAST COAST/55E): WIND : Anti-cyclonic 05 to 15, but S to SE 15 to 25 in the extreme south-west. It will become cyclonic 10 to 20 in the central- western parts by midnight but dissipating towards the end of the period. VIS : Good, but moderate in showers and rain in places in the south spreading to the central parts by the end of the period. MOZAMBIQUE CHANNEL: WIND : S to SE 10 to 20, but E to NE 05 to 10 in the south-west until midnight. VIS : Good. MADAGASCAR EAST: WIND : S to SE 15 to 25. VIS : Good, but moderate to poor in showers and rain in the central parts. MARION FORTIES EAST (40S/50S, 35E/50E): WIND : N to NW 15 to 25 in the east at first reaching 35, otherwise S to SW 20 to 30 reaching 35 to 40 in the central parts spreading eastward. It will become W to NW 15 to 25 in the west towards the end of the period spreading eastward. VIS : Good in the west, otherwise moderate to poor in showers and rain clearing towards midnight. SEA STATE: 3.5 to 4.5m W swell reaching 5.5 to 6.5m in the south-west spreading eastward. AREA 2: ======= MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN) DATE: 23/05/29 AT 0500UTC AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE.). PART 1: WARNING : - GALE EXPECTED OVER WAM AND CRO. PART 2: GENERAL SYNOPSYS, 23/05/29 AT 0000 UTC : - HIGH 1028 NEAR 33S/64E, SLOWLY MOVING EASTERLY AND WEAKENING. - WAVING FRONT AXIS 34S/50E, 39S/53E, 39S/65E, 43S/72E , 49S/72E, SLOWLY MOVING EASTERLY. - COLD FRONT ( CF ) AXIS 40S/39E, 50S/53E, MOVING NORTH-EASTERLY. PART 3: FORECAST FOR 24 HOURS FROM 29/05/23 AT 0600 UTC TO 30/05/23 AT 0600UTC : WAM (30S/40S,50E/65E) : FRONTAL RAIN AND SHOWERS NEAR WAVING FRONT, THEN ( CF ) LATER. SCATTERED SHOWERS ELSEWHERE. WIND: AT START ANTICLOCKWISE 2/4 IN EAST AND NE 3/5 ELSEWHERE, THEN SOON NE 4/6 INCREASING 6/8 AND BACKING SW IN FAR SOUTH-WEST AT END. STRONG GUSTS NEAR ( CF ). VIS : POOR OR VERY POOR IN PRECIPITATIONS. SEA : MODERATE OR ROUGH, VERY ROUGH IN FAR SOUTH-WEST AT END. AMS (30S/40S,65E/80E) : FRONTAL RAIN IN SOUTH NEAR WAVING FRONT. SCATTERED SHOWERS ELSEWHERE. WIND: ANTICLOCKWISE 3/4 IN NORTH, W 3/5 IN SOUTH, BACKING NW IN SOUTH- WEST AT END. VIS : POOR IN PRECIPITATIONS. SEA : MODERATE OR ROUGH. S SWELL 2 OR 3 M, THEN SW SWELL 2 OR 3 M IN SOUTH SOON. CRO (40S/50S,50E/65E) : FRONTAL RAIN AND SHOWERS WITH WAVING FRONT IN NORTH, THEN ( CF ) IN FAR SOUTH-WEST AT START MOVING NORTH-EASTERLY. SCATTERED SHOWERS ELSEWHERE. WIND: NW 5/7, 3/4 IN NORTH-EAST AT START, INCREASING 6/8 AND BACKING SW IN EAST AND SOUTH LATER, THEN W AT END. STRONG GUSTS NEAR ( CF ). VIS : POOR OR VERY POOR IN PRECIPITATIONS. SEA : MODERATE OR ROUGH IN NORTH, ROUGH TO VERY ROUGH IN SOUTH, THEN VERY ROUGH IN FAR NORTH-EAST AT END. W SWELL 2 OR 3 M INCREASING 3 OR 4 M IN EAST ANS SOUTH LATER. KER (40S/50S,65E/80E) : FRONTAL RAIN AND SHOWERS WITH WAVING FRONT AND ( CF ) IN SOUTH-WEST AT END. SCATTERED SHOWERS ELSEWHERE. WIND: CLOCKWISE 4/6 AT START, THEN NW BY WEST INCREASING 5/7. STRONG GUSTS NEAR ( CF ). VIS : POOR OR VERY POOR IN PRECIPITATIONS. SEA : MODERATE OR ROUGH, VERY ROUGH IN FAR SOUTH-WEST LATER. SW SWELL 2 OR 3 M IN EAST AT START. W SWELL 2 OR 3 M IN WEST, IN EAST LATER. SW SWELL 3 OR 5 M IN FAR SOUTH-WEST AT END.