WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
07TH OF JULY 2026 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:
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FORECAST VALID FROM 071000 TO 081000 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. ST HELENA: SW to W 35 in the extreme south-west.
2. TRISTAN: E to SE 35 to 40 reaching 50 in the south but cyclonic 35 to 40
in the north-west reaching 50.
3. CAPE EAST: N to NW 35 in the south-west spreading south-eastwards.
4. MARION FORTIES EAST: W 35 in the south.
SYNOPTIC CHART 06:00Z
=====================
High 1040 hPa 34s56e.
Low 998 hPa 32s14w, Low 964 hPa 54s35e.
1. Cold Front: 20s18w 25s13w 30s11w 35s11w 37s13w 34s17w into 32s14w.
AREA FORECAST:
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ASCENSION (06S/15S, 00E/20W):
WIND : E to SE 10 to 20 but variable 05 in the south-west.
VIS : Good.
ANGOLA (06S/15S, 00E/00N):
WIND : SW 05 to 10 in the east, otherwise S to SE 10 to 15.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : Variable 05 in the north-east, otherwise N to NW 15 to 25 but SW
to W 20 to 30 in the south-west reaching 35 in the extreme south-
west.
VIS : Good in the north-east, otherwise moderate in showers and
thundershowers but poor in the extreme south.
SEA STATE: 3.0 to 4.0m, except in the north-east, reaching 5.0 to 6.0m in the
south but 6.5 to 7.5m in the south-west, with S to SW swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 05 to 15 reaching 20 to 25 in the south-east but NE 10 to
15 in the south-west.
VIS : Good.
SEA STATE: 3.0m in the south from mid-period, with S to SW swell.
TRISTAN (30S/40S, 00E/20W):
WIND : N to NE 20 to 30 in the north-east, otherwise E to SE 30 to 40
reaching 50 in the south but cyclonic 30 to 40 in the north-west
reaching 50.
VIS : Poor in showers and thundershowers but moderate in the extreme
east and north-east.
SEA STATE: 3.0 to 4.0m in the north-east, otherwise 5.0 to 6.0m reaching 7.0
to 8.0m in the west and south, with SE swell but NW swell in the
north-east.
CAPE WEST (30S/40S, 00E/20E):
WIND : Variable 05 to 10 in the north, otherwise NW 10 to 20 reaching 25
to 30 in the south-east. It will become S to SW 15 to 25 in the
south from mid-period but E to NE 15 to 25 in extreme west.
VIS : Good but moderate in showers and rain in the south and south-west.
SEA STATE: 3.0 to 3.5, except in the north-east, reaching 4.0 to 4.5m in the
south, with SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : N to NW 15 to 25 reaching 30 to 35 in the south-west spreading
south-eastwards. It will become SW 15 to 25 in the south-west in
the second half of the period.
VIS : Good but moderate in showers and thundershowers in the south-west,
spreading to the south-east from mid-period.
SEA STATE: 3.0 to 4.0m in the south-west reaching 4.5 to 5.0m from mid-
period, with SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : E 10 to 20 reaching 25 in the extreme north but N to NW 10 to 20
in the west.
VIS : Good.
SEA STATE: 3.0m in the extreme north, with SE swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 10 to 15 reaching 20 to 25 in the south-east.
VIS : Mostly good.
SEA STATE: 3.0m in the south-east, with S to SE swell.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : E to SE 15 to 25 reaching 30 in the extreme north-west.
VIS : Moderate in showers and rain.
SEA STATE: 3.0 to 3.5m, with S to SE swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : NW 15 to 25 but W 25 to 35 in the south.
VIS : Moderate to poor in showers and rain.
SEA STATE: 3.0 to 4.0m, reaching 5.0 to 6.0m in the south and west but 6.5 to
7.0m in the extreme south, with W to SW swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
26/07/07 AT 0600UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALE EXPECTED OVER CRO AND KER.
PART 2: GENERAL SYNOPSIS, 26/07/07 AT 0000UTC
- HIGH-PRESSURE SYSTEM AT 1037 HPA NEAR 36S/56E, MOVING SLOWLY EASTWARD.
- COLD FRONT (CF) VERY SLOW-MOVING OVER NORTHEASTERN AMS.
- COLD FRONT (CG) CENTERED AT 41S36E, 43S50E, 47S59E, AND 51S62E, MOVING RAPIDLY EASTWARD.
- COLD FRONT (CH) MOVING INTO WESTERN CRO, LINKED TO A DEEPENING LOW EXPECTED 954 NEAR 58S/53E THE 08/07 AT 00UTC.
PART 3: FORECAST FOR 24 HOURS FROM 26/07/07 AT 0600UTC TO 26/07/08 AT 0600UTC
WAM (30S/40S, 50E/65E)
FEW SHOWERS.
WIND: ANTICLOCKWISE 3/4 BUT WEST NORTHWEST 5/6 IN THE SOUTH WITH GUSTS.
SEA: MODERATE TO ROUGH. SOUTH SWELL AROUND 3M OVER EASTERN ABATING.
VIS: MAINLY GOOD.
AMS (30S/40S, 65E/80E)
ISOLATED SHOWERS BECOMIG MORE FREQUENT IN THE NORTHEAST.
WIND: SOUTHERLY WINDS 4/5, LOCALLY 6 IN THE NORTH, WITH GUSTS; SHIFTING TO ANTICYCLONIC WINDS 3/4 BY THE END, BUT VEERING WESTERLY TO 5 IN THE SOUTH, POSSIBLY REACHING 6 BY THE END.
SEA: ROUGH BECOMING LOCALLY MODERATE IN THE WEST TOWARD THE END. SW SWELL NEAR 3M ABATING.
VIS: MODERATE UNDER SHOWERS.
CRO (40S/50S, 50E/65E)
FRONTAL RAIN AND SHOWERS (CG THEN CH). SCATTERED SHOWERS BETWEEN BETWEEN THE 2 FRONTS.
WIND: FROM THE WEST AT 3 TO 6, SHIFTING TO NORTHWEST TO WEST AT 6 TO 7, LOCALLY 8 WITH SEVERE GUSTS, BUT WEAKENING TO 3/4 FROM THE WEST OVER THE WESTERN PART OF THE AREA BY THE END.
SEA: MODERATE TO ROUGH FROM NW TO SE OF THE AREA BECOMING ROUGH TO VERY ROUGH LOCALLY HIGH ON THE SW OF THE AREA AT END. A 3- TO 5-METER SWELL FROM THE SOUTHWEST WILL ARRIVE IN THE SOUTHWEST PART OF THE AREA TOWARD THE END.
VIS: POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
FRONTAL RAIN AND SHOWERS FROM WEST WITH CG.
WIND: WEST TO NORTHWEST 6/7, OCCASIONALLY 8, WITH SEVERE GUSTS, SHIFTING TO PREDOMINANTLY WEST 3/5, THEN NORTHWEST 6/7, LOCALLY 8 BY THE END.
SEA: ROUGH TO VERY ROUGH. SW SWELL 3 TO 4M.
VIS: POOR IN PRECIPITATION