1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
2026-08-11, 12:00 UTC.
NATIONAL WEATHER SERVICE
SEA ICE AND ICEBERGS ISSUED BY SHN
PRESSURE HPA
BEAUFORT SCALE WINDS.
PART 1 GALE WARNING:
WARNING 373: STRONG BARIC GRADIENT MOV E NOT CHANGE PROVOKES WINDS FORCE 8 FROM
SECTOR W WITH GUST BETWEEN 40S-50S AND 20W-40W
WARNING 367: STRONG BARIC GRADIENT MOV E PROVOKES WINDS FORCE 8 FROM SW WITH
GUST BETWEEN 35S-40S AND 20W-40W
PART 2 GENERAL SYNOPSIS AT 09:00UTC
HIGH 1033HPA 39S 61W NOT MOV NC
LOW 990HPA 41S 21W MOV SE DPN EXTENDS CFNT41|S 21W 36S 23W 35S 25W
LOW 966HPA 41S 21W MOV SE DPN EXTENDS CFNT41S 21W 36S 23W 35S 25W
101400 UTC 1.SEA ICE LIMIT 5803S 02000W 5605S 02618W 5702S 03217W 5731S 03757W
5737S 04317W 5926S 04814W 6027S 05248W 6203S 05655W 6333S 06033W 6409S 06337W
6408S 06559W 6257S 06716W 2.ICEBERGS GREATER THAN 10NM D33B 6100S 053 27W
21X12NM A81 5909S 05106W 28X25NM A76C 5239S 03051W 16X6NM 3.ICEBERGS SMALLER
THAN 10NM D33C 6125S 05305W 9X5NM ICEBERG1 6121S 05212W 5X3NM ICEBERG2 6108S
05232W 5X3NM ICEBERG3 6049S 05203W 6X4NM 4.ICEBERGS AREA A5820S 02000W 4600S
02000W 5300S 03800W 5805S 03800W B5805S 03800W 5300S 03800W 5800S 05000W 6040S
05000W C6040S 05000W 5800S 05000W 6300S 06716W 6620S 06716W
PART 3 FORECAST ISSUED 12:00 UTC VALID UNTIL 12:00 UTC 2026-08-12
COASTAL AREAS:
INNER RIO DE LA PLATA: SECTOR E 4/5 VIS GOOD
OUTER RIO DE LA PLATA: SECTOR E 4/5 VIS GOOD
URUGUAY SOUTH EAST COASTS: SECTOR S 4/5 BACK SECTOR E BY 11/1800 VIS GOOD
MAR DEL PLATA COASTS(3617S - 3830S): SECTOR S 4/5 VIS GOOD
RINCON BAHIA BLANCA COASTS(3830S - 41S): SECTOR S 3/4 VIS GOOD
PENINSULA DE VALDES COASTS(41S - 45S): SW 4/5 VIS GOOD
GOLFO DE SAN JORGE COASTS(45S - 48S): SW 4/5 VIS GOOD
SOUTH PATAGONIA COASTS(48S - 54S): SECTOR W 4/5 WITH GUSTS BACK SECTOR S BY
12/0300 VIS GOOD
FIN DEL MUNDO COASTS(54S - 55S): SECTOR S 4/5 WITH GUSTS BACK SECTOR S BY
11/2100 VIS GOOD
ISLAS MALVINAS COASTS: SECTOR W 6/7 WITH GUSTS BACK SECTOR S BY 12/0900 VIS
MODERATE OCNL POOR
OCEANIC AREAS:
NORTH AREA (35S- 40S AND 20W- 55W) W OF 40W: SW 8 WITH GUSTS PROB OF SH RAIN VIS
VERY POOR
REST OF THE AREA: SW 6/7 WITH GUSTS DECR 5/6 BY 12/0300 VIS GOOD
CENTRAL EAST AREA (40S- 50S AND 20W- 40W) W OF 30W: SECTOR W 8 WITH GUSTS PROB
OF SH RAIN VIS VERY POOR
REST OF THE AREA: SECTOR W 5/6 WITH GUSTS INCR 6/7 GUST WITH 8 INTENSITY BY
12/0300 PROB OF SH RAIN VIS POOR OCNL VERY POOR
CENTRAL WEST AREA (40S- 50S AND 40W- 60W): SW 6/7 GUST WITH 8 INTENSITY PROB OF
ISOL RAIN VIS POOR OCNL VERY POOR
SOUTH EAST AREA (50S- 60S AND 20W- 40W): SW 6/7 WITH GUSTS VEER SECTOR S BY
12/0900 PROB OF ISOL ISOL RAIN SNOW FALL VIS MODERATE OCNL VERY POOR
SOUTH WEST AREA (50S- 60S AND 40W- 60W): SECTOR W 6/7 PROB OF ISOL SNOW FALL VIS
POOR OCNL VERY POOR
DRAKE AREA (55S- 60S AND 60W- 67W): SECTOR W 6/7 WITH GUSTS BACK SECTOR S BY 12/
VIS POOR OCNL VERY POOR
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1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
12:00 UTC 11, AUGUST 2026.
NATIONAL WEATHER SERVICE (NWS)
SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS
PART 1 GALE WARNING:
1045/2026 STRONG BARIC GRADIENT SOUTHERN WEDDELL SEA NORTHERN WEDDELL SEA MOV NE DEEPENING PROVOKES WINDS FORCE 8 FROM SW WITH GUST IN 60S-70S 50W-38W UNTIL 11/1800
1046/2026 STRONG BARIC GRADIENT NORTHER BELLINGSHAUSEN SEA MOV E DEEPENING WILL PROVOKE WINDS FORCE 8 WITH GUST IN 60S-63S 90W-80W FROM 11/1800 UNTIL 12/1800
PART 2 GENERAL SYNOPSIS AT 09:00UTC
LOW 961HPA 64S 33W MOV E DPN
LOW 996HPA 61S 55W MOV E WKN
HIGH 1001HPA 67S 58W MOV NE INTSF
RIDGE 60S 80W 65S 81W 70S 82W MOV E INTSF
101400 UTC 1.SEA ICE LIMIT 5803S 02000W 5605S 02618W 5702S 03217W 5731S 03757W 5737S 04317W 5926S 04814W 6027S 05248W 6203S 05655W 6333S 06033W 6409S 06337W 6408S 06559W 6257S 06716W 2.ICEBERGS GREATER THAN 10NM D33B 6100S 053 27W 21X12NM A81 5909S 05106W 28X25NM A76C 5239S 03051W 16X6NM 3.ICEBERGS SMALLER THAN 10NM D33C 6125S 05305W 9X5NM ICEBERG1 6121S 05212W 5X3NM ICEBERG2 6108S 05232W 5X3NM ICEBERG3 6049S 05203W 6X4NM 4.ICEBERGS AREA A5820S 02000W 4600S 02000W 5300S 03800W 5805S 03800W B5805S 03800W 5300S 03800W 5800S 05000W 6040S 05000W C6040S 05000W 5800S 05000W 6300S 06716W 6620S 06716W
PART 3 FORECAST ISSUED 12:00 UTC VALID UNTIL 12:00 UTC 2026-08-12
COASTAL AREAS:
SOUTHERN PORTION OF DRAKE STRAIT W OF 60W: SW 6/5 WITH GUSTS VEER SECTOR W 5/4 WITH GUSTS BY 12/0300 PROB OF MIST PROB OFINTERMITTENT SNOW FALL IMPR TOWARDS NIGTH VIS POOR TO MODERATE OCNL GOOD
SOUTHERN PORTION OF DRAKE STRAIT REST OF THE AREA: SW 5/4 WITH GUSTS BACK SE 6/5 WITH GUSTS BY 11/2100 PROB OF MIST PROB OFINTERMITTENT SNOW FALL IMPR DURING THE EARLY MORNING VIS POOR TO MODERATE
MAR DE LA FLOTA COASTS W OF 60W: SW 7 WITH GUSTS VEER SECTOR W 6/5 WITH GUSTS BY 11/0600 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER TOWARDS THE END OF THE PERIOD VIS POOR TO MODERATE
MAR DE LA FLOTA COASTS REST OF THE AREA: SW 5/4 WITH GUSTS BACK SE 6/5 WITH GUSTS BY 11/2100 PROB OF MIST PROB OFINTERMITTENT SNOW FALL IMPR DURING THE EARLY MORNING VIS POOR TO MODERATE
GERLACHE STRAIT : SW 4/5 BACK SECTOR S 4/3 BY 12/0000 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
MARGARITA BAY : SECTOR N 3/4 BACK NW 4/3 BY 12/0000 PROB OF MIST PROB OFISOL SNOW FALL SPELLS OF GOOD WEATHER DURING THE EARLY MORNING VIS POOR TO MODERATE OCNL GOOD
EREBUS Y TERROR GULF : SE 5/4 BACK NE 5/4 BY 12/0300 PROB OF MIST PROB OFISOL SNOW FALL SPELLS OF GOOD WEATHER TOWARDS NIGTH VIS VERY POOR TO MODERATE OCNL GOOD
OCEANIC AREAS:
NORTHER BELLINGSHAUSEN SEA N OF 64S: SECTOR W 6/5 WITH GUSTS VEER NW 6/7 GUST WITH 8 INTENSITY BY 11/2100 PROB OF MIST PROB OFISOL SNOW FALL WORSENING DURING THE EVENING VIS MODERATE TO POOR
NORTHER BELLINGSHAUSEN SEA REST OF THE AREA: SW 4/5 WITH GUSTS VEER SECTOR N 4 WITH GUSTS BY 12/0000 PROB OF MIST PROB OFMOD SNOW FALL WORSENING TOWARDS NIGTH VIS GOOD TO MODERATE OCNL POOR
SOUTHERN BELLINGSHAUSEN SEA (66-73S 70-90W): SECTOR E 3/4 VEER SECTOR N 4/5 BY 11/2100 PROB OF FOG AND MIST IN PATCHES PROB OFISOL SNOW FALL WORSENING DURING THE NIGTH VIS GOOD TO MODERATE OCNL VERY POOR
NORTHERN WEDDELL SEA N OF 64S: SW 7/8 WITH GUSTS DECR SW 6/5 WITH GUSTS BY 11/1800 PROB OF MIST PROB OFISOL SNOW FALL IMPR DURING THE EVENING VIS POOR TO MODERATE OCNL GOOD
NORTHERN WEDDELL SEA REST OF THE AREA: SW 9 WITH GUSTS DECR SW 6/5 WITH GUSTS BY 11/1800 PROB OF MIST PROB OFISOL SNOW FALL IMPR STARTING NOON VIS POOR TO MODERATE
SOUTHERN WEDDELL SEA (68-78S 20-60W): SE 5/6 WITH GUSTS BACK SECTOR E 5/4 WITH GUSTS BY 11/1800 PROB OF MIST PROB OFISOL SNOW FALL SPELLS OF GOOD WEATHER DURING THE EVENING VIS MODERATE TO GOOD=