1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
2026-08-21, 12:00 UTC.
NATIONAL WEATHER SERVICE
SEA ICE AND ICEBERGS ISSUED BY SHN
PRESSURE HPA
BEAUFORT SCALE WINDS.
PART 1 GALE WARNING:
WARNING 389: STRONG BARIC GRADIENT MOV NE WILL PROVOKE WINDS FORCE 8 FROM SECTOR
S WITH GUST BETWEEN 40S-50S 50W-60W FROM 22/0300
WARNING 387: STRONG BARIC GRADIENT MOV E PROVOKES WINDS FORCE 8 WITH GUST
BETWEEN 15S-45S AND 20W-40W
WARNING 385: STRONG BARIC GRADIENT MOV NE PROVOKES WINDS FORCE 8 FROM SECTOR S
WITH GUST IN FIN DEL MUNDO COASTS ISLAS MALVINAS COASTS DRAKE AREA (55S- 60S AND
60W- 67W) BETWEEN 50S-60S AND 50W-60W
PART 2 GENERAL SYNOPSIS AT 09:00UTC
LOW 978HPA 48S 34W MOV SE DPN EXTENDS OFNT AT 48S 34W 50S 34W 47S 35W
LOW 993HPA 37S 41W MOV E NC EXTENDS OFNT AT 37S 41W 39S 42W 35S 45W
LOW 969HPA 59S 23W MOV SE WKN EXTENDS OFNT AT 59S 23W 59S 32W 54S 27W
STRONG BARIC GRADIENT 35S 60W 40S 60W MOV E
201400 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 5957S 05102W 21X12NM
A81 5848S 05055W 28X25NM A76C 5304S 03012W 16X6NM 3.ICEBERGS SMALLER THAN 10NM
D33C 6158S 05429W 9X5NM ICEBERG1 6008S 04940W 5X3NM ICEBERG2 6103S 05400W 5X3NM
ICEBERG3 6125S 05346W 6X4NM ICEBERG4 6123S 05411W 2X1NM ICEBERG5 6107S 05414W
3X1NM 4.ICEBERGS AREA A5602S 02000W 4600S 02000W 5000S 03000W 5300S 03000W
B5300S 03000W 5055S 03003W 5400S 04504W 5900S 04500W C5900S 04500W 5400S 04504W
5900S 05500W 6100S 05500W D6100S 05500W 5900S 05500W 6100S 06716W 6200S 06716W
PART 3 FORECAST ISSUED 12:00 UTC VALID UNTIL 12:00 UTC 2026-08-22
COASTAL AREAS:
INNER RIO DE LA PLATA: SECTOR S 3/4 VIS GOOD OCNL MODERATE
OUTER RIO DE LA PLATA: SECTOR S 3/4 LOW PROB OF DRIZZLE STARTING EVENING VIS
GOOD OCNL MODERATE
URUGUAY SOUTH EAST COASTS: SECTOR S 3/4 LOW PROB OF DRIZZLE STARTING EVENING VIS
GOOD OCNL MODERATE
MAR DEL PLATA COASTS(3617S - 3830S): SECTOR S 5/6 WITH GUSTS PROB OF DRIZZLE
STARTING EVENING VIS MODERATE
RINCON BAHIA BLANCA COASTS(3830S - 41S): SECTOR S 5/6 WITH GUSTS PROB OF
DRIZZLE STARTING EVENING VIS MODERATE
PENINSULA DE VALDES COASTS(41S - 45S): SECTOR S 5/6 WITH GUSTS LOW PROB OF
ISOL RAIN VIS MODERATE
GOLFO DE SAN JORGE COASTS(45S - 48S): SECTOR S 5/6 WITH GUSTS LOW PROB OF ISOL
RAIN VIS MODERATE
SOUTH PATAGONIA COASTS(48S - 54S): SECTOR S 6/7 WITH GUSTS LOW PROB OF ISOL
RAIN VIS MODERATE
FIN DEL MUNDO COASTS(54S - 55S): SECTOR S 7 WITH GUSTS INCR 8 WITH GUSTS BY
21/1800 DECR 7 BY 22/1200 PROB OF ISOL RAIN AND SNOW MIXTURE STARTING NIGTH NEXT
IMPR VIS VERY POOR TO POOR
ISLAS MALVINAS COASTS: SECTOR S 7 WITH GUSTS INCR 8 WITH GUSTS BY 21/1800 PROB
OF ISOL RAIN AND SNOW MIXTURE VIS VERY POOR
OCEANIC AREAS:
NORTH AREA (35S- 40S AND 20W- 55W) W OF 40W: SECTOR S 6 WITH GUSTS VEER SECTOR W
BY 22/0900 SH RAIN VIS MODERATE
REST OF THE AREA: NW 9 WITH GUSTS VEER SECTOR W 6 WITH GUSTS BY 22/0300 RAIN
VIS POOR
CENTRAL EAST AREA (40S- 50S AND 20W- 40W) W OF 30 - N OF 45S: SECTOR W 5 WITH
GUSTS SH RAIN VIS MODERATE
E OF 30 - N OF 45S: NW 7 WITH GUSTS INCR 8 WITH GUSTS BY 21/1800 VEER SECTOR W
5 WITH GUSTS BY 22/0300 RAIN VIS POOR
REST OF THE AREA: SECTOR W 7/6 WITH GUSTS SH RAIN VIS MODERATE OCNL POOR
CENTRAL WEST AREA (40S- 50S AND 40W- 60W) W OF 50W: SECTOR S 6/7 WITH GUSTS INCR
8 WITH GUSTS BY 22/0300 RAIN AND SNOW MIXTURE VIS MODERATE TO POOR
REST OF THE AREA: SECTOR S 5/7 WITH GUSTS VEER SECTOR W WITH GUSTS BY 22/0600
RAIN AND SNOW MIXTURE VIS MODERATE OCNL POOR
SOUTH EAST AREA (50S- 60S AND 20W- 40W): SECTOR S 5 WITH GUSTS ISOL RAIN AND
SNOW MIXTURE VIS GOOD OCNL MODERATE
SOUTH WEST AREA (50S- 60S AND 40W- 60W) W OF 50W: SECTOR S 6 WITH GUSTS INCR 8
WITH GUSTS BY 21/2100 RAIN AND SNOW MIXTURE VIS MODERATE TO POOR
REST OF THE AREA: SECTOR S 6/7 WITH GUSTS RAIN AND SNOW MIXTURE VIS POOR
DRAKE AREA (55S- 60S AND 60W- 67W): SECTOR S 9 WITH GUSTS DECR 6 WITH GUSTS BY
22/0300 LOW PROB OF SH DURING THE NIGTH VIS POOR
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1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
12:00 UTC 21, AUGUST 2026.
NATIONAL WEATHER SERVICE (NWS)
SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS
PART 1 GALE WARNING:
1097/2026 STRONG BARIC GRADIENT SOUTHERN PORTION OF DRAKE STRAIT MAR DE LA FLOTA COASTS MOV NE INTENSIFYING PROVOKES WINDS FORCE 8 FROM SW WITH GUST IN 60S-64S 70W-60W UNTIL 21/2100
1098/2026 STRONG BARIC GRADIENT GERLACHE STRAIT MARGARITA BAY MOV NE DEEPENING PROVOKES WINDS FORCE 8 FROM SW WITH GUST IN 64S-70S 70W-65W UNTIL 21/2100
PART 2 GENERAL SYNOPSIS AT 09:00UTC
LOW 980HPA 62S 55W MOV E DPN
HIGH 1005HPA 68S 65W MOV E INTSF
RIDGE 60S 85W 65S 85W 70S 82W MOV E INTSF
201400 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 5957S 05102W 21X12NM A81 5848S 05055W 28X25NM A76C 5304S 03012W 16X6NM 3.ICEBERGS SMALLER THAN 10NM D33C 6158S 05429W 9X5NM ICEBERG1 6008S 04940W 5X3NM ICEBERG2 6103S 05400W 5X3NM ICEBERG3 6125S 05346W 6X4NM ICEBERG4 6123S 05411W 2X1NM ICEBERG5 6107S 05414W 3X1NM 4.ICEBERGS AREA A5602S 02000W 4600S 02000W 5000S 03000W 5300S 03000W B5300S 03000W 5055S 03003W 5400S 04504W 5900S 04500W C5900S 04500W 5400S 04504W 5900S 05500W 6100S 05500W D6100S 05500W 5900S 05500W 6100S 06716W 6200S 06716W
PART 3 FORECAST ISSUED 12:00 UTC VALID UNTIL 12:00 UTC 2026-08-22
COASTAL AREAS:
SOUTHERN PORTION OF DRAKE STRAIT W OF 60W: SW 9 WITH GUSTS DECR SECTOR S 7/5 WITH GUSTS BY 22/0300 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER TOWARDS NIGTH VIS POOR TO MODERATE OCNL GOOD
SOUTHERN PORTION OF DRAKE STRAIT REST OF THE AREA: SW 8 WITH GUSTS BACK SECTOR S 9 WITH GUSTS BY 21/2100 PROB OF MIST PROB OFINTERMITTENT SNOW FALL IMPR TOWARDS THE END OF THE PERIOD VIS VERY POOR TO MODERATE
MAR DE LA FLOTA COASTS W OF 60W: SW 9 WITH GUSTS DECR SECTOR S 7/5 WITH GUSTS BY 22/0300 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER TOWARDS NIGTH VIS POOR TO MODERATE OCNL GOOD
MAR DE LA FLOTA COASTS REST OF THE AREA: SW 9 WITH GUSTS BACK SECTOR S 9 WITH GUSTS BY 21/2100 PROB OF MIST PROB OFINTERMITTENT SNOW FALL IMPR TOWARDS THE END OF THE PERIOD VIS VERY POOR TO MODERATE
GERLACHE STRAIT : SECTOR S 5/6 GUST WITH 8 INTENSITY BACK SE 4 BY 22/0300 PROB OF MIST PROB OFISOL SNOW FALL IMPR DURING THE EVENING VIS POOR TO MODERATE
MARGARITA BAY : SECTOR E 4/3 BACK NE 3 BY 22/0000 PROB OF MIST PROB OFISOL SNOW FALL IMPR STARTING NOON VIS MODERATE TO GOOD
EREBUS Y TERROR GULF : SECTOR S 7/8 VEER SW 8 WITH GUSTS BY 21/1800 PROB OF MIST BLIZZARD PROB OFISOL SNOW FALL IMPR DURING THE EARLY MORNING VIS VERY POOR TO MODERATE
OCEANIC AREAS:
NORTHER BELLINGSHAUSEN SEA N OF 64S: SW 6 WITH GUSTS VEER SECTOR W 5/4 WITH GUSTS BY 22/0300 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER STARTING EVENING VIS POOR TO MODERATE
NORTHER BELLINGSHAUSEN SEA REST OF THE AREA: SECTOR W 5/6 WITH GUSTS VEER NW 5 WITH GUSTS BY 22/0000 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER STARTING NOON VIS POOR TO MODERATE OCNL GOOD
SOUTHERN BELLINGSHAUSEN SEA (66-73S 70-90W): SECTOR W 5/6 WITH GUSTS VEER NW 6/5 WITH GUSTS BY 22/0000 PROB OF FOG AND MIST IN PATCHES PROB OFISOL SNOW FALL WORSENING TOWARDS NOON VIS GOOD TO MODERATE OCNL VERY POOR
NORTHERN WEDDELL SEA N OF 64S: SECTOR S 5/4 BACK SE 5/6 BY 21/2100 PROB OF FOG AND MIST IN PATCHES PROB OFINTERMITTENT SNOW FALL IMPR STARTING NOON VIS VERY POOR TO MODERATE OCNL GOOD
NORTHERN WEDDELL SEA REST OF THE AREA: SE 3/4 VEER SECTOR S 4/5 BY 22/0300 PROB OF FOG AND MIST IN PATCHES IMPR TOWARDS NOON VIS VERY POOR TO MODERATE OCNL GOOD
SOUTHERN WEDDELL SEA (68-78S 20-60W): SECTOR E 3/4 VEER SE 4 BY 21/1800 PROB OF MIST VIS MODERATE TO GOOD=