1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
00:00 UTC 22, SEPTEMBER 2026.
NATIONAL WEATHER SERVICE (NWS)
SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS
PART 1 GALE WARNING:
1167/2026 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 60W-50W UNTIL 22/0900
1168/2026 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 21:00UTC
LOW 974HPA 66S 50W MOV E DPN
LOW 971HPA 68S 55W MOV E DPN
RIDGE 60S 78W 64S 75W 68S 72W MOV E WKN
LOW 974HPA 67S 90W MOV E DPN
RIDGE 60S 33W 65S 35W 70S 35W 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 00:00 UTC VALID UNTIL 00:00 UTC 2026-09-23
COASTAL AREAS:
SOUTHERN PORTION OF DRAKE STRAIT W OF 60W: SECTOR W 5/6 GUST WITH 8 INTENSITY VEER NW 7 WITH GUSTS BY 22/0900 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER DURING THE EARLY MORNING VIS POOR TO MODERATE
SOUTHERN PORTION OF DRAKE STRAIT REST OF THE AREA: NW 8 WITH GUSTS BACK SECTOR W 7 WITH GUSTS BY 22/0900 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER DURING THE MORNING VIS POOR TO MODERATE
MAR DE LA FLOTA COASTS W OF 60W: SECTOR W 5/6 GUST WITH 8 INTENSITY VEER NW 7 WITH GUSTS BY 22/0900 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER DURING THE EARLY MORNING VIS POOR TO MODERATE
MAR DE LA FLOTA COASTS REST OF THE AREA: NW 8 WITH GUSTS BACK SECTOR W 7 WITH GUSTS BY 22/0900 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER DURING THE MORNING VIS POOR TO MODERATE
GERLACHE STRAIT : SECTOR W 5/4 VEER NE 4 BY 22/1200 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER STARTING NOON VIS POOR TO MODERATE OCNL GOOD
MARGARITA BAY : NW 4/3 VEER SECTOR N 3/4 BY 22/1200 PROB OF MIST PROB OFISOL SNOW FALL SPELLS OF GOOD WEATHER STARTING EVENING VIS POOR TO MODERATE OCNL GOOD
EREBUS Y TERROR GULF : SW 5/6 BACK SE 5/4 BY 22/1500 PROB OF FOG AND MIST IN PATCHES WORSENING TOWARDS THE END OF THE PERIOD VIS GOOD TO MODERATE OCNL VERY POOR
OCEANIC AREAS:
NORTHER BELLINGSHAUSEN SEA N OF 64S: SECTOR W 6/7 WITH GUSTS INCR SECTOR W 8 WITH GUSTS BY 22/0600 PROB OF MIST PROB OFISOL SNOW FALL SPELLS OF GOOD WEATHER TOWARDS THE END OF THE PERIOD 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 22/0900 PROB OF MIST PROB OFINTERMITTENT SNOW FALL IMPR STARTING NOON VIS POOR TO MODERATE
SOUTHERN BELLINGSHAUSEN SEA (66-73S 70-90W): SECTOR W 3/4 BACK SECTOR S 4/3 BY 22/0600 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 5/5 BY 22/1200 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 22/0900 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 22/1200 PROB OF MIST VIS GOOD TO MODERATE=
1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
2026-09-21, 12:00 UTC.
NATIONAL WEATHER SERVICE
SEA ICE AND ICEBERGS ISSUED BY SHN
PRESSURE HPA
BEAUFORT SCALE WINDS.
PART 1 GALE WARNING:
WARNING 431: LOW 984HPA AT 45S 52W MOV E DEEPENING EXPECTED 48S 40W BY 22/1200
WILL PROVOKE WINDS FORCE 8 FROM SECTOR E BETWEEN 50S-55S 20W-50W FROM 21/1800
WARNING 430: LOW 984HPA AT 45S 52W MOV E DEEPENING EXPECTED 48S 40W BY 22/1200
PROVOKES WINDS FORCE 8 FROM SW WITH GUST IN OUTER RIO DE LA PLATA URUGUAY SOUTH
EAST COASTS MAR DEL PLATA COASTS RINCON BAHIA BLANCA COASTS BETWEEN 35S-40S AND
40W-60W
WARNING 429: STRONG BARIC GRADIENT MOV E PROVOKES WINDS FORCE 8 FROM SECTOR N
WITH GUST BETWEEN 35S-45S AND 20W-50W
WARNING 428: LOW 984HPA AT 45S 52W MOV E DEEPENING EXPECTED 48S 40W BY 22/1200
PROVOKES WINDS FORCE 9 FROM SECTOR S WITH GUST IN PENINSULA DE VALDES COASTS
CENTRAL WEST AREA (40S- 50S AND 40W- 60W)
PART 2 GENERAL SYNOPSIS AT 09:00UTC
201400 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 5732S 04518W 28X25NM
D33B 5927S 04527W 21X12NM A76C 5430S 02626W 17X6NM A85 6110S 05345W 10X3NM
3.ICEBERGS SMALLER THAN 10NM D32 5737S 03815W 9X6NM D33C 6136S 05358W 9X5NM
ICEBERG1 5654S 04624W 5X3NM ICEBERG2 5910S 05042W 5X3NM ICEBERG3 5759S 04930W
4X3NM ICEBERG4 5820S 04807W 3X1NM ICEBERG5 6102S 05315W 10X3NM 4.ICEBERGS AREA
A5600S 02000W 5000S 02000W 5900S 04800W 5300S 04800W 5000S 04000W B5900S 06200W
6500S 06500W 5900S 04800W 5300S 04800W
LOW 981HPA 58S 23W MOV E EXTENDS CFNT AT 58S 23W 54S 22W 50S 40W MOV E
LOW 984HPA 45S 52W MOV E DPN EXP 48S 40W BY 22/1200 EXTENDS CFNT AT 45S 52W 35S
49W MOV E ASOCIATED WITH WFNT AT 45S 52W 47S 48W 50S 40W
PART 3 FORECAST ISSUED 12:00 UTC VALID UNTIL 12:00 UTC 2026-09-22
COASTAL AREAS:
INNER RIO DE LA PLATA: SW 6/7 GUST WITH 8 INTENSITY VIS MODERATE
OUTER RIO DE LA PLATA: SW 7/8 GUST WITH 8 INTENSITY PROB OF ISOL SH VIS MODERATE
OCNL POOR
URUGUAY SOUTH EAST COASTS: SW 6/7 GUST WITH 8 INTENSITY INCR 7/8 WITH GUSTS BY
21/2100 PROB OF ISOL SH STARTING NIGTH VIS MODERATE OCNL POOR
MAR DEL PLATA COASTS(3617S - 3830S): SW 7/8 WITH GUSTS DECR 7/6 WITH GUSTS BY
22/0300 PROB OF ISOL SH IMPR TOWARDS NIGTH VIS POOR TO GOOD
RINCON BAHIA BLANCA COASTS(3830S - 41S): SW 8 WITH GUSTS DECR 7/5 WITH GUSTS
BY 21/2100 PROB OF ISOL SH IMPR TOWARDS EVENING VIS POOR TO GOOD
PENINSULA DE VALDES COASTS(41S - 45S): S 8 WITH GUSTS DECR 7/6 WITH GUSTS BY
21/2100 PROB OF ISOL SH IMPR TOWARDS MORNING VIS POOR TO GOOD
GOLFO DE SAN JORGE COASTS(45S - 48S): S 7/6 GUST WITH 8 INTENSITY DECR 6/5
WITH GUSTS BY 22/0000 VEER W 4 BY 22/0600 VIS MODERATE TO GOOD
SOUTH PATAGONIA COASTS(48S - 54S): S 6/5 WITH GUSTS VEER W 4 BY 22/0300 VIS
MODERATE TO GOOD
FIN DEL MUNDO COASTS(54S - 55S): S 5 VEER SECTOR W BY 21/2100 VIS MODERATE TO
GOOD
ISLAS MALVINAS COASTS: S 6/5 WITH GUSTS VIS MODERATE TO GOOD
OCEANIC AREAS:
NORTH AREA (35S- 40S AND 20W- 55W) E OF 40W: N 8 WITH GUSTS PROB OF HVY STORMS
VIS VERY POOR TO POOR
REST OF THE AREA: W 7 WITH GUSTS INCR 8 WITH GUSTS BY 21/1800 BACK SW BY
22/0000 PROB OF SH STARTING NIGTH VIS MODERATE OCNL POOR
CENTRAL EAST AREA (40S- 50S AND 20W- 40W) E OF 30W: SW 6/7 GUST WITH 8 INTENSITY
INCR 8 WITH GUSTS BY 22/0000 PROB OF HVY RAIN VIS MODERATE TO VERY POOR
REST OF THE AREA: NW 8 WITH GUSTS PROB OF RAIN VIS POOR OCNL VERY POOR
CENTRAL WEST AREA (40S- 50S AND 40W- 60W): NE 6/7 GUST WITH 8 INTENSITY VEER
SECTOR S 8 WITH GUSTS BY 22/0000 PROB OF HVY RAIN VIS VERY POOR
SOUTH EAST AREA (50S- 60S AND 20W- 40W) N OF 55S: SECTOR S 6/5 WITH GUSTS BACK E
8 BY 21/2100 PROB OF SNOW FALL VIS VERY POOR
REST OF THE AREA: SW 6/5 WITH GUSTS VEER NW WITH GUSTS BY 22/0300 VIS
MODERATE
SOUTH WEST AREA (50S- 60S AND 40W- 60W) S OF 55S: SECTOR W 6/7 WITH GUSTS PROB
OF ISOL SNOW FALL STARTING EARLY MORNING VIS MODERATE OCNL POOR
E OF 30 - N OF 55S: SE 7 WITH GUSTS INCR 8 WITH GUSTS BY 21/1800 LOW PROB OF
ISOL SNOW FALL VIS MODERATE OCNL POOR
REST OF THE AREA: SECTOR S 7/6 WITH GUSTS VIS MODERATE
DRAKE AREA (55S- 60S AND 60W- 67W): SECTOR W 6/7 WITH GUSTS PROB OF ISOL SNOW
FALL STARTING NIGTH VIS MODERATE OCNL POOR
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