1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
2026-09-22, 12:00 UTC.
NATIONAL WEATHER SERVICE
SEA ICE AND ICEBERGS ISSUED BY SHN
PRESSURE HPA
BEAUFORT SCALE WINDS.
PART 1 GALE WARNING:
WARNING 433: STRONG BARIC GRADIENT MOV E WILL PROVOKE WINDS FORCE 8 FROM SECTOR
W WITH GUST BETWEEN 55S-60S 40W-70W
WARNING 432: LOW 958HPA AT 46S 42W MOV SE WEAKENING PROVOKES WINDS FORCE 9
AROUND ITSELF WITH GUST BETWEEN 35S-55S AND 20W-55W UNTIL 23/1200
PART 2 GENERAL SYNOPSIS AT 09:00UTC
LOW 958HPA 46S 42W MOV SE WKN EXTENDS CFNT35S 35W 43S 30W 50S 28W MOV E
STRONG BARIC GRADIENT MAR DEL PLATA COASTS SOUTH EAST AREA (50S- 60S AND 20W-
40W) MOV E
HIGH 1024HPA 38S 64W MOV NE WKN EXTENDS RIDGE42S 64W 46S 63W 50S 62W MOV E
211400 UTC 1.SEA ICE LIMIT 5529S 02000W 5408S 02617W 5336S 03217W 5536S 03757W
5710S 04316W 5821S 04813W 5954S 05248W 6232S 05655W 6252S 06033W 6358S 06336W
6017S 06558W 6051S 06716W 2.ICEBERGS GREATER THAN 10NM A81 5728S 04510W 28X25NM
D33B 5926S 04516W 21X12NM A76C 5431S 02624W 17X6NM A85 6100S 05345W 10X3NM
ICEBERG1 6058S 05312W 10X3NM 3.ICEBERGS SMALLER THAN 10NM D32 5742S 03818W 9X6NM
D33C 6147S 05420W 9X5NM ICEBERG2 5648S 04555W 5X3NM ICEBERG3 5855S 05053W 5X3NM
ICEBERG4 5752S 04906W 4X3NM ICEBERG5 5808S 04804W 3X1NM ICEBERG6 6112S 05336W
3X2NM 4.ICEBERGS AREA A5600S 02000W 5000S 02000W 5900S 04800W 5300S 04800W 5000S
04000W B5900S 06200W 6500S 06500W 5900S 04800W 5300S 04800W
PART 3 FORECAST ISSUED 12:00 UTC VALID UNTIL 12:00 UTC 2026-09-23
COASTAL AREAS:
INNER RIO DE LA PLATA: SW 4/3 WITH GUSTS BACK SECTOR N 4 BY 22/2100 VIS GOOD
OUTER RIO DE LA PLATA: SW 5/4 WITH GUSTS BACK SECTOR N BY 22/2100 PROB OF ISOL
DRIZZLE RAIN NEXT IMPR TOWARDS NIGTH VIS GOOD OCNL MODERATE
URUGUAY SOUTH EAST COASTS: SW 6/4 WITH GUSTS BACK SECTOR N BY 23/0000 PROB OF
ISOL DRIZZLE RAIN NEXT IMPR TOWARDS NIGTH VIS MODERATE TO GOOD
MAR DEL PLATA COASTS(3617S - 3830S): SW 6/4 WITH GUSTS BACK SECTOR N BY
23/0300 PROB OF ISOL DRIZZLE RAIN IMPR TOWARDS NIGTH VIS MODERATE TO GOOD
RINCON BAHIA BLANCA COASTS(3830S - 41S): SECTOR S 5/4 WITH GUSTS VEER SECTOR N
7 WITH GUSTS BY 22/1500 PROB OF ISOL DRIZZLE RAIN NEXT IMPR TOWARDS EVENING VIS
MODERATE TO GOOD
PENINSULA DE VALDES COASTS(41S - 45S): SW 4 WITH GUSTS VEER SECTOR N 7 WITH
GUSTS BY 22/1500 PROB OF SH TOWARDS EVENING VIS GOOD TO MODERATE
GOLFO DE SAN JORGE COASTS(45S - 48S): SECTOR N 4/6 WITH GUSTS BACK SECTOR W 5
WITH GUSTS BY 23/0000 PROB OF SH DURING THE EVENING VIS GOOD TO MODERATE
SOUTH PATAGONIA COASTS(48S - 54S): SECTOR W 4 WITH GUSTS VEER SECTOR N 5 WITH
GUSTS BY 22/1500 PROB OF ISOL SH RAIN TOWARDS NIGTH VIS GOOD TO MODERATE
FIN DEL MUNDO COASTS(54S - 55S): SECTOR W 5 WITH GUSTS VEER SW 4 WITH GUSTS BY
23/0000 PROB OF ISOL RAIN SNOW FALL STARTING NIGTH VIS GOOD TO MODERATE
ISLAS MALVINAS COASTS: SECTOR W 4 WITH GUSTS VEER SECTOR N 5 WITH GUSTS BY
22/1800 PROB OF ISOL DRIZZLE SNOW FALL SPELLS OF GOOD WEATHER VIS MODERATE OCNL
GOOD
OCEANIC AREAS:
NORTH AREA (35S- 40S AND 20W- 55W) E OF 40W: SECTOR N 8 WITH GUSTS BACK SECTOR W
7 WITH GUSTS BY 22/2100 PROB OF RAIN VIS VERY POOR TO POOR
REST OF THE AREA: SW 8/5 WITH GUSTS VEER SECTOR N BY 23/1200 PROB OF ISOL SH
RAIN NEXT IMPR TOWARDS THE END OF THE PERIOD VIS VERY POOR TO GOOD
CENTRAL EAST AREA (40S- 50S AND 20W- 40W): SECTOR N 9 WITH GUSTS VEER SECTOR S 8
WITH GUSTS BY 22/1800 PROB OF RAIN RAIN AND SNOW MIXTURE VIS VERY POOR
CENTRAL WEST AREA (40S- 50S AND 40W- 60W) E OF 55W: SECTOR S 9/7 WITH GUSTS VEER
SECTOR W 5 WITH GUSTS BY 23/0600 PROB OF RAIN SNOW FALL NEXT IMPR TOWARDS THE
END OF THE PERIOD VIS VERY POOR TO MODERATE
REST OF THE AREA: SECTOR S 7/5 WITH GUSTS VEER SECTOR N 6 WITH GUSTS BY 22/1800
PROB OF ISOL RAIN SNOW FALL SPELLS OF GOOD WEATHER VIS POOR TO MODERATE OCNL
GOOD
SOUTH EAST AREA (50S- 60S AND 20W- 40W) N OF 55S: SECTOR E 8 WITH GUSTS VEER
SECTOR S 7 WITH GUSTS BY 22/2100 PROB OF RAIN AND SNOW MIXTURE SNOW FALL VIS
VERY POOR TO POOR
REST OF THE AREA: SECTOR N 5 WITH GUSTS BACK SECTOR W BY 22/1800 PROB OF ISOL
RAIN AND SNOW MIXTURE SNOW FALL VIS MODERATE OCNL POOR
SOUTH WEST AREA (50S- 60S AND 40W- 60W) S OF 55S: SECTOR W 6/8 WITH GUSTS RAIN
RAIN AND SNOW MIXTURE SNOW FALL VIS VERY POOR TO POOR OCNL MODERATE
E OF 55 - N OF 55S: SECTOR S 8/6 WITH GUSTS VEER SECTOR W 5 WITH GUSTS BY
23/0000 PROB OF RAIN AND SNOW MIXTURE SNOW FALL VIS VERY POOR TO POOR OCNL
MODERATE
REST OF THE AREA: SECTOR S 5 WITH GUSTS VEER SECTOR W BY 22/1800 PROB OF ISOL
RAIN SNOW FALL SPELLS OF GOOD WEATHER VIS POOR TO MODERATE OCNL GOOD
DRAKE AREA (55S- 60S AND 60W- 67W): SECTOR W 7/8 WITH GUSTS BACK SECTOR S 5 WITH
GUSTS BY 23/0300 PROB OF RAIN AND SNOW MIXTURE SNOW FALL VIS VERY POOR TO POOR
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1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
12:00 UTC 22, SEPTEMBER 2026.
NATIONAL WEATHER SERVICE (NWS)
SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS
PART 1 GALE WARNING:
1169/2026 STRONG BARIC GRADIENT SOUTHERN PORTION OF DRAKE STRAIT MAR DE LA FLOTA COASTS MOV E DEEPENING PROVOKES WINDS FORCE 8 WITH GUST IN 60S-64S 70W-55W UNTIL 23/0000
1170/2026 STRONG BARIC GRADIENT NORTHER BELLINGSHAUSEN SEA MOV E DEEPENING PROVOKES WINDS FORCE 8 FROM SECTOR W WITH GUST IN 60S-67S 90W-70W UNTIL 22/1800
PART 2 GENERAL SYNOPSIS AT 09:00UTC
LOW 963HPA 67S 43W MOV E DPN
LOW 970HPA 66S 73W MOV E DPN
RIDGE 60S 60W 62S 59W 64S 59W MOV E WKN
211400 UTC 1.SEA ICE LIMIT 5529S 02000W 5408S 02617W 5336S 03217W 5536S 03757W 5710S 04316W 5821S 04813W 5954S 05248W 6232S 05655W 6252S 06033W 6358S 06336W 6017S 06558W 6051S 06716W 2.ICEBERGS GREATER THAN 10NM A81 5728S 04510W 28X25NM D33B 5926S 04516W 21X12NM A76C 5431S 02624W 17X6NM A85 6100S 05345W 10X3NM ICEBERG1 6058S 05312W 10X3NM 3.ICEBERGS SMALLER THAN 10NM D32 5742S 03818W 9X6NM D33C 6147S 05420W 9X5NM ICEBERG2 5648S 04555W 5X3NM ICEBERG3 5855S 05053W 5X3NM ICEBERG4 5752S 04906W 4X3NM ICEBERG5 5808S 04804W 3X1NM ICEBERG6 6112S 05336W 3X2NM 4.ICEBERGS AREA A5600S 02000W 5000S 02000W 5900S 04800W 5300S 04800W 5000S 04000W B5900S 06200W 6500S 06500W 5900S 04800W 5300S 04800W
PART 3 FORECAST ISSUED 12:00 UTC VALID UNTIL 12:00 UTC 2026-09-23
COASTAL AREAS:
SOUTHERN PORTION OF DRAKE STRAIT W OF 60W: NW 7/8 WITH GUSTS BACK SW 7 WITH GUSTS BY 23/0000 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER TOWARDS THE END OF THE PERIOD VIS POOR TO MODERATE
SOUTHERN PORTION OF DRAKE STRAIT REST OF THE AREA: NW 8 WITH GUSTS BACK SECTOR W 7 WITH GUSTS BY 23/0300 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 W OF 60W: NW 7/8 WITH GUSTS BACK SW 7 WITH GUSTS BY 23/0000 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: NW 8 WITH GUSTS BACK SECTOR W 7 WITH GUSTS BY 23/0300 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER TOWARDS THE END OF THE PERIOD VIS POOR TO MODERATE
GERLACHE STRAIT : NE 4/5 VEER SECTOR E 4 BY 22/2100 PROB OF MIST PROB OFINTERMITTENT SNOW FALL IMPR STARTING NOON VIS POOR TO MODERATE OCNL GOOD
MARGARITA BAY : SECTOR N 4/3 VEER NE 3/4 BY 23/0000 PROB OF MIST PROB OFISOL SNOW FALL SPELLS OF GOOD WEATHER STARTING EVENING VIS POOR TO MODERATE OCNL GOOD
EREBUS Y TERROR GULF : SE 3/4 VEER SECTOR S 5/4 BY 22/2100 PROB OF FOG AND MIST IN PATCHES WORSENING DURING THE NIGTH VIS GOOD TO MODERATE OCNL VERY POOR
OCEANIC AREAS:
NORTHER BELLINGSHAUSEN SEA N OF 64S: NW 7 GUST WITH 8 INTENSITY BACK SECTOR S 5 WITH GUSTS BY 22/2100 PROB OF FOG PROB OFISOL SNOW FALL SPELLS OF GOOD WEATHER TOWARDS NIGTH VIS POOR TO MODERATE OCNL GOOD
NORTHER BELLINGSHAUSEN SEA REST OF THE AREA: SECTOR W 5/6 GUST WITH 8 INTENSITY BACK SECTOR S 5/4 BY 22/1500 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER STARTING NOON VIS POOR TO MODERATE
SOUTHERN BELLINGSHAUSEN SEA (66-73S 70-90W): SECTOR W 3/4 BACK SECTOR S 4/3 BY 22/1500 PROB OF FOG AND MIST IN PATCHES PROB OFISOL SNOW FALL IMPR STARTING EVENING VIS VERY POOR TO MODERATE OCNL GOOD
NORTHERN WEDDELL SEA N OF 64S: NW 7 WITH GUSTS BACK SECTOR W 6/5 BY 22/1800 PROB OF FOG AND MIST IN PATCHES PROB OFISOL SNOW FALL IMPR STARTING NOON VIS VERY POOR TO MODERATE OCNL GOOD
NORTHERN WEDDELL SEA REST OF THE AREA: NE 4/5 VEER SECTOR E 7 BY 22/1800 PROB OF FOG AND MIST IN PATCHES PROB OFISOL SNOW FALL IMPR TOWARDS THE END OF THE PERIOD VIS VERY POOR TO MODERATE OCNL GOOD
SOUTHERN WEDDELL SEA (68-78S 20-60W): SECTOR S 3/4 BACK SECTOR E 3/4 BY 22/1800 PROB OF MIST VIS GOOD TO MODERATE=