METAREA 6 bulletinset


HIGH SEAS FORECAST SOUTH 60S
WWAA02 SAWB 231200

1:31:06:01:00

SECURITE

WEATHER BULLETIN FOR SHIPPING - METAREA 6-

12:00 UTC 23, AUGUST 2026.

NATIONAL WEATHER SERVICE (NWS)

SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS

PART 1 GALE WARNING:

1101/2026 STRONG BARIC GRADIENT SOUTHERN BELLINGSHAUSEN SEA MOV E DEEPENING PROVOKES WINDS FORCE 8 WITH GUST IN 68S-73S 90W-70W UNTIL 23/1800

PART 2 GENERAL SYNOPSIS AT 09:00UTC

LOW 1004HPA 65S 56W MOV E DPN

HIGH 1019HPA 62S 48W MOV NE INTSF EXTENDS RIDGE AT 62S 48W 64S 39W 65S 30W MOV E

HIGH 1023HPA 61S 75W MOV E WKN EXTENDS RIDGE AT 61S 75W 64S 72W 67S 68W MOV E

231400 UTC 1.SEA ICE LIMIT 5547S 02000W 5416S 02618W 5352S 03217W 5617S 03757W 5825S 04316W 5953S 04814W 6047S 05247W 6215S 05654W 6338S 06032W 6135S 06337W 6213S 06558W 6233S 06716W 2.ICEBERGS GREATER THAN 10NM D33B 6016S 05008W 21X12NM A81 5841S 05051W 28X25NM A76C 5322S 03005W 16X6NM 3.ICEBERGS SMALLER THAN 10NM D33C 6158S 05358W 9X5NM ICEBERG1 5935S 05020W 5X3NM ICEBERG2 6105S 05418W 5X3NM ICEBERG3 6123S 05404W 6X4NM ICEBERG4 6112S 05418W 2X1NM ICEBERG5 6108S 05414W 3X1NM 4.ICEBERGS AREA A5600S 02000W 4500S 02000W 5200S 04500W 6000S 04500W B5300S 04500W 6600S 04500W 6200S 06716W 6600S 06716W

PART 3 FORECAST ISSUED 12:00 UTC VALID UNTIL 12:00 UTC 2026-08-24

COASTAL AREAS:

SOUTHERN PORTION OF DRAKE STRAIT W OF 60W: SW 4/5 VEER SECTOR W 5/4 BY 23/1800 PROB OF MIST PROB OFISOL SNOW FALL SPELLS OF GOOD WEATHER TOWARDS THE END OF THE PERIOD VIS MODERATE TO GOOD

SOUTHERN PORTION OF DRAKE STRAIT REST OF THE AREA: SE 3/4 BACK NW 4/5 BY 23/1500 PROB OF MIST PROB OFINTERMITTENT SNOW FALL WORSENING DURING THE EVENING VIS MODERATE TO POOR

MAR DE LA FLOTA COASTS W OF 60W: SW 4/5 VEER SECTOR W 5/4 BY 23/1800 PROB OF MIST PROB OFISOL SNOW FALL SPELLS OF GOOD WEATHER TOWARDS THE END OF THE PERIOD VIS MODERATE TO GOOD

MAR DE LA FLOTA COASTS REST OF THE AREA: SE 3/4 BACK NW 4/4 BY 23/1500 PROB OF MIST PROB OFINTERMITTENT SNOW FALL WORSENING DURING THE EVENING VIS MODERATE TO POOR

GERLACHE STRAIT : SW 3/4 BACK SE 4/3 BY 23/1800 PROB OF FOG AND MIST IN PATCHES PROB OFISOL SNOW FALL WORSENING TOWARDS NOON VIS GOOD TO MODERATE OCNL VERY POOR

MARGARITA BAY : SECTOR N 3/4 BACK NW 4/5 BY 23/1800 PROB OF MIST PROB OFINTERMITTENT SNOW FALL WORSENING TOWARDS NOON VIS GOOD TO MODERATE OCNL VERY POOR

EREBUS Y TERROR GULF : NW 3/4 BACK SW 4 BY 23/1800 PROB OF FOG AND MIST IN PATCHES SPELLS OF GOOD WEATHER DURING THE EVENING VIS VERY POOR TO MODERATE

OCEANIC AREAS:

NORTHER BELLINGSHAUSEN SEA N OF 64S: SW 3/4 VEER SECTOR N 4/3 BY 23/1800 PROB OF MIST PROB OFISOL SNOW FALL WORSENING DURING THE NOON VIS GOOD TO MODERATE

NORTHER BELLINGSHAUSEN SEA REST OF THE AREA: NW 4/5 INCR NW 6 WITH GUSTS BY 23/2100 PROB OF MIST PROB OFISOL SNOW FALL WORSENING TOWARDS NOON VIS GOOD TO MODERATE OCNL POOR

SOUTHERN BELLINGSHAUSEN SEA (66-73S 70-90W): NW 7/8 WITH GUSTS BACK SECTOR W 8 WITH GUSTS BY 23/1800 PROB OF FOG AND MIST IN PATCHES PROB OFISOL SNOW FALL SPELLS OF GOOD WEATHER TOWARDS THE END OF THE PERIOD VIS VERY POOR TO MODERATE

NORTHERN WEDDELL SEA N OF 64S: SECTOR S 3/4 VEER NW 4/3 BY 23/1800 PROB OF FOG AND MIST IN PATCHES WORSENING TOWARDS NIGTH VIS GOOD TO MODERATE OCNL VERY POOR

NORTHERN WEDDELL SEA REST OF THE AREA: SECTOR W 5 VEER NW 6 BY 24/0000 PROB OF FOG AND MIST IN PATCHES WORSENING TOWARDS THE END OF THE PERIOD VIS GOOD TO MODERATE OCNL VERY POOR

SOUTHERN WEDDELL SEA (68-78S 20-60W): SECTOR E 3/4 BACK NE 5/7 WITH GUSTS BY 23/1800 PROB OF MIST PROB OFINTERMITTENT SNOW FALL IMPR TOWARDS THE END OF THE PERIOD VIS VERY POOR TO MODERATE=


HIGH SEAS FORECAST NORTH 60S
WWST02 SABM 231200

1:31:06:01:00

SECURITE

WEATHER BULLETIN FOR SHIPPING - METAREA 6-

2026-08-23, 12:00 UTC.

NATIONAL WEATHER SERVICE

SEA ICE AND ICEBERGS ISSUED BY SHN

PRESSURE HPA

BEAUFORT SCALE WINDS.

PART 1 GALE WARNING:

WARNING 389: LOW 978HPA AT 48S 38W MOV E DEEPENING EXPECTED BY 24/1200 PROVOKES

WINDS FORCE 9 AROUND ITSELF WITH GUST BETWEEN 35S-55S AND 20W-50W

PART 2 GENERAL SYNOPSIS AT 09:00UTC

LOW 978HPA 48S 38W MOV E DPN EXP 48S 32W BY 24/1200 EXTENDS CFNT AT 35S 35W 45S

30W 50S 30W MOV E

HIGH 1030HPA 40S 70W MOV NE NC EXP 35S 58W BY 24/1200

221400 UTC 1.SEA ICE LIMIT 5547S 02000W 5416S 02618W 5352S 03217W 5617S 03757W

5825S 04316W 5953S 04814W 6047S 05247W 6215S 05654W 6338S 06032W 6135S 06337W

6213S 06558W 6233S 06716W 2.ICEBERGS GREATER THAN 10NM D33B 6016S 05008W 21X12NM

A81 5841S 05051W 28X25NM A76C 5322S 03005W 16X6NM 3.ICEBERGS SMALLER THAN 10NM

D33C 6158S 05358W 9X5NM ICEBERG1 5935S 05020W 5X3NM ICEBERG2 6105S 05418W 5X3NM

ICEBERG3 6123S 05404W 6X4NM ICEBERG4 6112S 05418W 2X1NM ICEBERG5 6108S 05414W

3X1NM 4.ICEBERGS AREA A5600S 02000W 4500S 02000W 5200S 04500W 6000S 04500W

B5300S 04500W 6600S 04500W 6200S 06716W 6600S 06716W

PART 3 FORECAST ISSUED 12:00 UTC VALID UNTIL 12:00 UTC 2026-08-24

COASTAL AREAS:

INNER RIO DE LA PLATA: SECTOR S 3 BACK SECTOR E BY 23/1800 VIS GOOD

OUTER RIO DE LA PLATA: SECTOR S 5/4 WITH GUSTS BACK SECTOR E 3 BY 23/1800 PROB

OF ISOL RAIN TOWARDS EVENING IMPR VIS MODERATE TO GOOD

URUGUAY SOUTH EAST COASTS: SW 6/3 WITH GUSTS PROB OF ISOL RAIN TOWARDS EVENING

IMPR VIS MODERATE TO GOOD

MAR DEL PLATA COASTS(3617S - 3830S): SW 5/3 WITH GUSTS BACK SECTOR N WITH

GUSTS BY 24/0000 PROB OF ISOL RAIN DURING THE MORNING VIS GOOD OCNL MODERATE

RINCON BAHIA BLANCA COASTS(3830S - 41S): SECTOR S 4/3 WITH GUSTS BACK SECTOR N

4 BY 23/1800 VIS GOOD

PENINSULA DE VALDES COASTS(41S - 45S): SECTOR S 4/3 BACK SECTOR N 6 WITH GUSTS

BY 23/1500 VIS GOOD

GOLFO DE SAN JORGE COASTS(45S - 48S): SECTOR N 3/6 WITH GUSTS VIS GOOD

SOUTH PATAGONIA COASTS(48S - 54S): SECTOR N 4/6 WITH GUSTS VIS GOOD

FIN DEL MUNDO COASTS(54S - 55S): SECTOR N 4/5 WITH GUSTS PROB OF ISOL SNOW

FALL TOWARDS THE END OF THE PERIOD IMPR VIS MODERATE TO GOOD

ISLAS MALVINAS COASTS: SECTOR W 3/4 VEER SECTOR N 5 WITH GUSTS BY 23/2100 PROB

OF ISOL SNOW FALL TOWARDS THE END OF THE PERIOD IMPR VIS MODERATE TO GOOD

OCEANIC AREAS:

NORTH AREA (35S- 40S AND 20W- 55W) E OF 50W: SECTOR W 8 WITH GUSTS PROB OF RAIN

VIS VERY POOR

REST OF THE AREA: SECTOR S 6/5 WITH GUSTS PROB OF RAIN TOWARDS THE END OF THE

PERIOD IMPR VIS POOR TO MODERATE

CENTRAL EAST AREA (40S- 50S AND 20W- 40W) E OF 30W: SECTOR N 8 WITH GUSTS PROB

OF RAIN VIS VERY POOR

REST OF THE AREA: SECTOR S 7/9 WITH GUSTS PROB OF RAIN AND SNOW MIXTURE SNOW

FALL VIS VERY POOR

CENTRAL WEST AREA (40S- 50S AND 40W- 60W) E OF 50W: SECTOR S 8/9 WITH GUSTS PROB

OF RAIN AND SNOW MIXTURE SNOW FALL VIS VERY POOR

REST OF THE AREA: SECTOR S 6/4 WITH GUSTS VEER SECTOR N BY 24/0300 PROB OF RAIN

AND SNOW MIXTURE SNOW FALL TOWARDS THE END OF THE PERIOD IMPR VIS POOR TO

MODERATE

SOUTH EAST AREA (50S- 60S AND 20W- 40W) N OF 55S: SECTOR E 8/9 WITH GUSTS PROB

OF RAIN AND SNOW MIXTURE SNOW FALL VIS VERY POOR

REST OF THE AREA: SECTOR S 5/4 WITH GUSTS PROB OF ISOL SNOW FALL VIS MODERATE

SOUTH WEST AREA (50S- 60S AND 40W- 60W) E OF 50 - N OF 55S: SECTOR S 8/7 WITH

GUSTS PROB OF SNOW FALL VIS VERY POOR TO POOR

W OF 50 - N OF 55S: SECTOR S 6/4 WITH GUSTS VEER SECTOR W BY 24/0000 PROB OF

ISOL SNOW FALL VIS MODERATE OCNL POOR

REST OF THE AREA: SECTOR W 4/5 WITH GUSTS PROB OF ISOL SNOW FALL VIS MODERATE

DRAKE AREA (55S- 60S AND 60W- 67W): SECTOR S 3 BACK SECTOR N 4 WITH GUSTS BY

23/1500 PROB OF ISOL SNOW FALL VIS MODERATE OCNL GOOD

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