IOR
WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII EAST OF 20E.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE 21st OF AUGUST 2024 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 211000 TO 221000 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: N to NW 35 in the east, otherwise W to SW 35 to 40
reaching 45 to 50 in places in the south.
2. DURBAN EAST: S to SW 35 to 40 in the west from mid-period.
3. MARION FORTIES EAST: S to SE 35 to 40 over the central and northern
parts from mid-period reaching 45 to 50 in
the extreme north.
SYNOPTIC CHART 06:00Z
=====================
High 1030 hPa 36s05e High 1032 hPa 30s54e.
Low 1000 hPa 39s23e Low 975 hPa 40s14w.
Cold Front 1: 29s16e 34s23e 35s24e 40s27e 41s26e into 39s23e.
Cold front 2: 28s30w 30s21w 34s13w 37s10w 41s10w into 40s14w.
AREA FORECAST:
==============
CAPE EAST (32.5S/40S, 20E/50E):
WIND : N to NW 25 to 35 in the east, otherwise W to SW 30 to 40
reaching 45 to 50 in places in the south. It will become E to
NE 15 to 25 in the extreme west towards the end of the period.
VIS : Good in the east for the first half of the period, otherwise
moderate to poor in showers and rain.
SEA STATE: 3.5 to 4.5m in the east for the first half of the period, with
NW swell, otherwise 5.0 to 7.0m with SW to W swell reaching
8.0 to 10.0m in places in the south from mid-period spreading
to the south-eastern parts by end of the period.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : Anti-cyclonic 05 to 10 in the extreme east for the first half
of the period, otherwise N to NW 15 to 25. It will become S to
SW 30 to 40 in the west from mid-period.
VIS : Good, becoming moderate in showers and rain in the west from
mid-period.
SEA STATE: 3.0 to 3.5m in the south-west, with N to NE swell. It will
become 4.0 to 6.0m in the south-west from mid-period, with S
to SW swell, spreading to the entire western part by end of
the period while reaching 6.5m in the extreme south-west.
MOZAMBIQUE CHANNEL:
WIND : E to SE 05 to 15 reaching 20 to 25 in the north.
VIS : Good but moderate in isolated showers in the north.
MADAGASCAR EAST:
WIND : E to SE 15 to 25 but NE to E 10 to 20 in the south.
VIS : Good in the south, otherwise moderate in light showers.
SEA STATE: 3.0 to 3.5m in the north, with E to SE swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : SW 15 to 25 in the south-east at first, otherwise S to SE 15
to 25 reaching 30 to 40 over the central and northern parts
from mid-period but reaching 45 to 50 in the extreme north.
VIS : Moderate to poor in showers and rain but moderate in light
sleet and snow in the south.
SEA STATE: 3.5 to 4.5m reaching 5.0 to 5.5m in the east at first, with W
to swell. It will become 5.5 to 7.5m in the north from mid-
period with S to SE swell, reaching 8.0m to 9.0m in the
extreme north towards the end of the period.
AREA 2:
=======
MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
DATE: 24/08/21 AT 0500UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE.).
PART 1: WARNING :
– STRONG GALE FORCE 9 OVER CRO AND KER.
– GALE FORCE 8 OVER AMS.
PART 2: GENERAL SYNOPSYS, 24/08/21 AT 0000 UTC :
– HIGH 1031 HPA NEAR 31S/52E, FORECAST 1028 HPA NEAR 29S/63E AT END.
– LOW 974 HPA NEAR 53S/54E WITH COLD FRONT AXIS 41S/40E, 46S/54E, 49S/59E, 54S/59E MOVING EASTWARD QUICKLY.
PART 3: FORECAST FOR 24 HOURS FROM 21/08/24 AT 0600 UTC TO 22/08/24 AT 0600UTC :
WAM (30S/40S,50E/65E) :
SHOWERS OVER SOUTHERN AREA.
WIND : ANTICLOCKWISE 3 TO 5 OVER NORTHERN, INCREASING WEST TO NORTH-WEST 6 TO 7 OVER SOUTHERN.
SEA : ROUGH TO VERY ROUGH, LOCALLY HIGH OVER FAR SOUTH-EASTERN AREA AND MODERATE OVER NORTH-WESTERN AT END. SOUTH-WEST SWELL 3 TO 4 M, 5 M OVER SOUTH-EASTERN AT END.
VISI : POOR UNDER PRECIPITATIONS.
AMS (30S/40S,65E/80E) :
SHOWERS OVER SOUTHERN.
WIND : SOUTH-WEST 6 TO 7 OVER EASTERN, SETTING-UP WESTERLY 5 TO 6 OVER NORTHERN AREA AND 7 TO 8 OVER SOUTHERN DURING THE DAY. DECREASING 4 TO 5 BY WESTERN AREA AT END.
SEA: ROUGH TO VERY ROUGH, HIGH OVER SOUTHERN AREA IN THE NIGHT.
SOUTH-WEST SWELL 3 TO 4 M, 5 TO 6 M BY SOUTH-WESTERN AT END.
VISI :POOR UNDER PRECIPITATIONS.
CRO (40S/50S,50E/65E) :
SHOWERS AND SQUALLS.
WIND : WESTERLY TO SOUTH-WEST 7 TO 8, LOCALLY 9 OVER SOUTHERN THEN EASTERN AREA. SOUTH-WEST 4 TO 6 BY WESTERN AT NIGHT BUT CLOCKWISE 6 TO 7 OVER NORTH-WESTERN AT END.
SEA: VERY ROUGH TO HIGH, VERY HIGH OVER EASTERN PART. WESTERLY TO TEMPORARY NORTH-WEST SWELL 3 TO 5 M, INCREASING 6 TO 7 M OVER EASTERN PART AT END.
VISI : POOR TO VERY POOR UNDER PRECIPITATIONS.
KER (40S/50S,65E/80E) :
SHOWERS AND SQUALLS.
WIND : WEST TO NORTH-WEST 6 TO 7, LOCALLY 8OVER WESTERN AREA SETTING-UP WESTERLY TO SOUTH-WEST 8 TO 9 BY WESTERN AT NIGHT, REACHING ALL THE AREA AT END.
SEA : ROUGH TO VERY ROUGH, BECOMING HIGH TO VERY HIGH BY WESTERN. WESTERLY TO TEMPORARY NORTH-WEST SWELL 3 TO 5 M, INCREASING 6 TO 7 M BY WESTERN AREA AT END.
VISI : POOR TO VERY POOR UNDER PRECIPITATIONS.
ENDS
THIS IS CAPE TOWN RADIO
NNNN
