METAREA 7 bulletinset


HIGH SEAS FORECAST
FQZA31 FAPR 190830

WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.

ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE

19TH OF APRIL 2026 AT 08:30 UTC.

FOR SOUTH-EAST SECTOR OF METAREA. VII, PREPARED BY REUNION, SEE AREA 2

BELOW.

NOTE: WX OBSERVATIONS.

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COULD ALL VESSELS EXPERIENCING UNEXPECTED, SEVERE WX/SEA STATE PLEASE

MAKE EVERY EFFORT TO REPORT THIS TO SAWS VIA CAPE TOWN RADIO.

AREA 1:

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FORECAST VALID FROM 191000 TO 201000 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:

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1. CAPE WEST: W to SW 35 in the south and central parts but 40 to 50 in

the east and south-eastern parts, moderating in the south and

central parts, while reaching 35 in the east and south-east

during the second half of the period.

2. CAPE EAST: N to NE 35 in the north-west, central and southern parts, but

W to NW 35 to 40 in places in the west and south-west,

reaching 45 to 50 in the west towards mid-period.

3. DURBAN EAST: SW 35 in the south-west during the second half of the

period.

4. MARION FORTIES EAST: N to NW 35 in the west and south-west from mid-

period.

SYNOPTIC CHART 06:00Z

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High 1028 hPa 49s15w, High 1028 hPa 43s75e

Low 1004 hPa 40s30w, Low 988 hPa 50s16e, Low 9885 hPa 55s47e

1. Cold Front: 26s27w 33s20w 40s21w into 40s30w

2. Cold Front: 30s06e 35s18e 40s25e 45s29e 50s27e into 50s16e

3. Cold Front: 33s37e 40s48e 45s53e 50s56e 55s54e into 55s47e

AREA FORECAST:

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ASCENSION (06S/15S, 00E/20W):

WIND : E to SE 10 to 20.

VIS : Good.

ANGOLA (06S/15S, 00E/00N):

WIND : S to SE 10 to 20, but SW 05 to 10 in the east.

VIS : Good.

ST HELENA (15S/30S, 00E/20W):

WIND : N to NE 15 to 25 in the south-west, otherwise E to SE 10 to 20. VIS : Good, but moderate in showers and thundershowers in the south-

western parts.

SEA STATE: 3.0m in the south-east towards mid-period, with SE swell.

TRADES (15S/30S, 00E/WEST COAST):

WIND : SW 10 to 20 in the south-eastern parts during the first half of

the period, otherwise S to SE 10 to 20, reaching 25 in the north-

east.

VIS : Good.

SEA STATE: 3.0 to 4.0m in the south from mid-period, with S to SW swell.

TRISTAN (30S/40S, 00E/20W):

WIND : S to SW 15 to 25 in the eastern parts, but N to NE 20 to 30 in

the west, otherwise anti-cyclonic 05 to 15.

VIS : Good, but moderate to poor in showers and thundershowers in the

west.

SEA STATE: 3.0m in the west with NE swell but 3.0 to 4.0m in the extreme

east, with S to SW in the east.

CAPE WEST (30S/40S, 00E/20E):

WIND : W to SW 30 to 35 in the south and central parts but 40 to 50 in

the east and south-eastern parts, elsewhere 15 to 25. It will

moderate to 15 to 25 in the south and central parts during the

second half of the period, and 30 to 35 in the east and south-

east during the same period.

VIS : Good, but moderate to poor in showers and thundershowers in

eastern half.

SEA STATE: 3.5 to 4.5m, reaching 5.5 to 6.5m in the central and the eastern

half, with SW swell.

CAPE EAST (32.5S/40S, 20E/50E):

WIND : N to NE 15 to 25 reaching 30 to 35 in the north-west, central and

southern parts, but W to NW 30 to 40 in places in the west and

south-west, reaching 45 to 50 in the west towards mid-period.

VIS : Good, but moderate to poor in showers and thundershowers in the

west and central parts, spreading to the east towards the end of

the period.

SEA STATE: 3.0 to 3.5m in the central parts, with NW swell, but 4.0 to 6.0m

in the west, north-west and south-west, reaching 6.5 to 7.0m in

the west and north-west during the second half of the period,

with W to SW swell.

DURBAN EAST (32.5S/25S, EAST COAST/55E):

WIND : E to NE 05 to 15, but 20 to 30 in the west and south-west,

becoming SW 30 to 35 in the south-west during the second half of

the period.

VIS : Good, but moderate in showers and thundershowers in the south-

west by mid-period.

SEA STATE: 3.0 to 3.5m in the south-west, reaching 4.0 to 4.5m from mid-

period, with SW swell.

MOZAMBIQUE CHANNEL:

WIND : Variable 05 to 10 in the central and south-eastern parts,

otherwise, E to NE 05 to 15, reaching 20 to 25 in the south-west

at times.

VIS : Good.

MADAGASCAR EAST (10S/25S, EAST COAST/55E):

WIND : E to NE 05 to 15 in the south, otherwise E to SE 10 to 20.

VIS : Good, but moderate in showers and thundershowers in places in the

north.

MARION FORTIES EAST (40S/50S, 35E/50E):

WIND : W to SW 15 to 25 in the south-east until mid-period, otherwise N

to NW 15 to 25, reaching 30 to 35 in the west and south-west by

mid-period.

VIS : Moderate to poor in showers and thundershowers at times.

SEA STATE: 3.0 to 4.0m, reaching 4.5m in the central north towards the end

of the period, with NW swell.

AREA 2:

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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)

26/04/19 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 SOUTHEASTERN KER AT END.

PART 2: GENERAL SYNOPSIS, 26/04/19 AT 0000UTC

- COLD FRONT OVER WESTERN CRO, MOVING EASTWARD QUICKLY.

- CONVERGENCE LINE WITH SQUALLS BETWEEN EASTERN WAM AND WESTERN AMS.

- HIGH AREA OVER AMS AND WAM WITH HIGH 1028 NEAR 41S/73E, MOVING SLOWLY EAST-NORTH-EASTWARD.

PART 3: FORECAST FOR 24 HOURS FROM 26/04/19 AT 0600UTC TO 26/04/20 AT 0600UTC

WAM (30S/40S, 50E/65E)

SHOWERS AND SQUALLS OVER EASTERN.

WIND: VARIABLE 3 TO 4. GUSTS IN SQUALLS OVER EASTERN.

SEA : MODERATE.

VIS : POOR UNDER PRECIPITATION.

AMS (30S/40S, 65E/80E)

SHOWERS AND SQUALLS AT TIMES THUNDERY OVER WESTERN.

WIND: ANTICLOCKWISE 2 TO 4 INCREASING 4/5 OVER SOUTHERN AREA LATER.

GUSTS IN SQUALLS.

SEA : MODERATE, LOCALLY ROUGH OVER FAR EASTERN BY SOUTH SWELL 2 TO 3 M.

VIS : POOR IN PRECIPITATION.

CRO (40S/50S, 50E/65E)

FRONTAL RAIN AND SHOWERS.

WIND: NORTH-WEST 4 TO 6, LOCALLY 7 IN SOUTH, BACKING W 4 TO 6 BEHIND THEN

DECREASING ANTICLOCKWISE 3 TO 5 LATER.

SEA : MODERATE TO ROUGH, LOCALLY VERY ROUGH OVER FAR SOUTHERN. W SWELL

2 TO 3 M.

VIS : POOR IN PRECIPITATION.

KER (40S/50S, 65E/80E)

FRONTAL RAIN AND SHOWERS.

WIND: ANTICLOCKWISE 3 TO 5INCREASING W 5/6 LOCALLY 7 FROM NORTH TO SOUTH,

REACHING TEMPORARILY 8 IN SOUTH-EASTERN AT END.

SEA : ROUGH TO VERY ROUGH OVER EASTERN AT FIRST, BECOMING MODERATE TO VERY

ROUGH FROM NORTH TO SOUTH. SW SWELL 2 TO 3 M, LOCALLY 4 M OVER SOUTH-

EASTERN AREA , ABATING.

VIS : POOR IN PRECIPITATION.