IOR
WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII EAST OF 20E.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE 26th OF MAY 2024 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 VIA CAPE TOWN RADIO.
AREA 1:
=======
FORECAST VALID FROM 262200 TO 272200 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: S to SW 35 to 40 in the south-east.
2. MARION FORTIES EAST: S to SW 35 to 40 in the north-east at first,
becoming W to NW 35 in the west mid-period spreading to the east by
the end of the period.
SYNOPTIC CHART 12:00Z
======================
High 1026 hPa 34s03e.
Low 984 hPa 51s00e Low 972 hPa 61s05w.
Cold Front: 34s15w 40s05w 45s00e into 51s00e into 61s05w.
AREA FORECAST:
==============
CAPE EAST (32.5S/40S, 20E/50E):
WIND : NW 20 to 30 in the north-east at first, otherwise S to SW 10
to 20 reaching 35 to 40 in the south-east, becoming variable
05 in the north-west by mid-period.
VIS : Good in the south-west, otherwise moderate in showers and
thundershowers.
SEA STATE: 3.5 to 4.5m, reaching 5.5 to 6.5m in the south-east, SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : W to NW 10 to 20, but W to SW 15 to 25 in the west becoming SE
10 to 20 over the central parts by mid-period.
VIS : Moderate in showers and rain in places.
SEA STATE: 3.0 to 3.5m in the extreme south-west spreading towards the
south-east by the end of the period, SW swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 15 to 25.
VIS : Good, but moderate in thundershowers in places in the north
and extreme south.
MADAGASCAR EAST:
WIND : Variable 05 in the south-west, otherwise S to SE 15 to 25.
VIS : Good, but moderate in showers and rain in the north.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : S to SW 20 to 30 reaching 35 to 40 in the north-east at first,
becoming W to NW 25 to 35 in the west mid-period spreading to
the east by the end of the period.
VIS : Poor to moderate in showers and rain, as well as in showers in
snow-showers at first.
SEA STATE: 5.5 to 6.5m, W to SW swell.
AREA 2:
=======
MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
DATE: 24/05/26 AT 1700 UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE STRONGER THAN AVERAGES GIVEN HERE).
PART 1: WARNING :
– GALE FORCE 8 RUNNING OVER WAM AND CRO AND EXPECTED LATER OVER KER.
– STRONG GALE FORCE 9 TO STORM FORCE 10 EXPECTED OVER CRO LATER AND OVER
SOUTH-WESTERN KER AT THE END.
PART 2: GENERAL SYNOPSYS, 24/05/26 AT 1200 UTC :
– THUNDERY LOW 1004 HPA OVER WAM NEAR 38S/59E, MOVING SLOWLY TO SOUTH-EASTWARD.
– NEW LOW ARRIVING BY WESTERN, RAPIDLY DEEPENING OVER CRO WITH ASSOCIATED COLD FRONT EXPECTED 958 HPA AROUND 49S/63E AT THE END.
– HIGH 1027 HPA OVER EASTERN AMS, LEAVING OVERNIGHT.
PART 3: FORECAST FOR 24 HOURS FROM 26/05/24 AT 1800 UTC TO 27/05/24 AT 1800 UTC :
WAM (30S/40S,50E/65E) :
RAIN, SHOWERS AND SQUALLS AT TIMES THUNDERY WITH TWO SUCCESSIVE LOWS.
WIND: CLOCKWISE 5 TO 6, SOMETIMES 7, INCREASING NW 5 TO 7 LOCALLY 8 BY
SOUTH-WESTERN SOON AND BACKING SW TO S 4 TO 6 BEHIND THE FRONT BY
WESTERN AT THE END. SEVERE GUSTS.
SEA : MODERATE TO ROUGH, BECOMING VERY ROUGH OVER SOUTHWESTERN SOON.
SW SWELL 2 TO 5 M FROM NORTHEAST TO SOUTH-WEST.
VISI: POOR UNDER PRECIPITATION.
AMS (30S/40S,65E/80E) :
RAIN OR SHOWERS BECOMING MORE FREQUENT OVER SOUTHERN.
WIND: ANTICLOCKWISE 3 TO 5 OVER EASTERN BUT N 4 TO 6 ELSEWHERE LOCALLY 7
OVER FAR SOUTHERN.
SEA: MODERATE TO ROUGH, LOCALLY VERY ROUGH OVER SOUTHERN. SW SWELL 2 TO
3 M.
CRO (40S/50S,50E/65E) :
RAIN OR SHOWERS. SNOW OVER SOUTHERN.
WIND: N 5 TO 7 LOCALLY 8 SOON WITH GUSTS BUT BECOMING CLOCKWISE 7 TO
9 LOCALLY 10 WITH VIOLENT GUSTS NEAR THE LOW AT THE END. BACKING W
5 TO 7 BY WESTERN AT THE END.
SEA: ROUGH TO VERY ROUGH, LOCALLY HIGH. WESTERLY SWELL 3 TO 5 M TO THE
SOUTH, CROSSED WITH VERY ROUGH WIND SEAS AT THE END.
VISI: POOR UNDER PRECIPITATION.
KER (40S/50S,65E/80E) :
RAIN OR SHOWERS. SNOW OVER SOUTHERN.
WIND: CLOCKWISE 6 TO 8 OVERNIGHT THEN NORTH-WESTERLY 6 TO 8 BY WESTERN AT
THE END, LOCALLY 9/10 OVER SOUTH-WESTERN WITH VIOLENT GUSTS.
SEA: ROUGH TO VERY ROUGH BECOMING HIGH OVER WESTERN AT THE END. WESTERLY
SWELL 2 TO 4 M.
VISI : POOR UNDER PRECIPITATION.
ENDS DE CAPE TOWN RADIO/ZSC+
NNNN