1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
2025-12-12, 00:00 UTC.
NATIONAL WEATHER SERVICE
SEA ICE AND ICEBERGS ISSUED BY SHN
PRESSURE HPA
BEAUFORT SCALE WINDS.
PART 1 GALE WARNING:
WARNING 490: LOW 957HPA AT 56S 75W MOV E NOT CHANGE EXPECTED 56S 66W BY 13/0000
WILL PROVOKE WINDS FORCE 8 FROM SECTOR W WITH GUST IN SOUTH PATAGONIA COASTS FIN
DEL MUNDO COASTS FROM 12/1200
WARNING 488: LOW 981HPA AT 33S 41W MOV SE WEAKENING EXPECTED 40S 30W BY 13/0000
PROVOKES WINDS FORCE 8 FROM SECTOR N WITH GUST BETWEEN 35S-40S AND 20W-35W
PART 2 GENERAL SYNOPSIS AT 21:00UTC
LOW 981HPA 33S 41W MOV SE WKN EXP 40S 30W BY 13/0000 EXTENDS OFNT AT 40S 40W 38S
46W 35S 47W
RIDGE 41S 25W 44S 29W 50S 39W
LOW 957HPA 56S 75W MOV E NC EXP 56S 66W BY 13/0000 EXTENDS WFNT AT DRAKE AREA
(55S- 60S AND 60W- 67W)
STATIONARY FRONT MAR DEL PLATA COASTS
111400 UTC 1.SEA ICE LIMIT 6000S 02000W 6018S 02013W 5946S 02759W 5636S 02538W
5728S 02924W 5803S 03403W 5927S 04120W 6009S 04759W 5854S 05008W 6056S 05459W
6249S 06019W 6619S 06716W 2.ICEBERGS GREATER THAN 10NM A23A 5240S 03958W 32X24NM
A74A 5620S 02516W 27X13NM A77 5104S 04117W 27X4NM A76C 5922S 03731W 16X7NM B15AB
5707S 04430W 10X4NM 3.ICEBERGS SMALLER THAN 10NM ICEBERG1 5330S 04044W 9X2NM
ICEBERG2 5258S 03920W 7X3NM ICEBERG3 5234S 04115W 3X3NM ICEBERG4 5132S 03452W
2X1NM ICEBERG5 5131S 03755W 4X2NM ICEBERG6 5236S 03704W 3X1NM ICEBERG7 5300S
03953W 4X1NM ICEBERG8 4949S 03459W 2X1NM ICEBERG9 5032S 02156W 3X1NM ICEBERG10
5216S 04144W 2X1NM ICEBERG11 5348S 04208W 4X1NM ICEBERG12 5031S 03850W 5X4NM
ICEBERG13 5110S 03526W 8X2NM ICEBERG14 5218S 04056W 7X2NM ICEBERG15 5237S 03936W
4X2NM ICEBERG16 4953S 02905W 2X1NM ICEBERG17 5214S 04006W 4X2NM ICEBERG18 5233S
04008W 4X1NM ICEBERG19 5228S 04001W 2X1NM ICEBERG20 5235S 04016W 3X2NM
ICEBERG215237S 04013W 2X1NM ICEBERG22 5215S 03959W 2X2NM ICEBERG23 5321S 04014W
11X3NM ICEBERG24 5241S 04013W 2X1NM ICEBERG25 5235S 04033W 3X1NM ICEBERG26 5035S
03850W 3X1NM ICEBERG27 5029S 03855W 4X1NM ICEBERG28 5254S 03953W 2X1NM
4.ICEBERGS AREA A 6102S 02000W 4500S 02000W 4800S 03400W 5826S 03400W B 5826S
03400W 4900S 03400W 4900S 04000W 5200S 04400W 6010S 4400W C 6010S 04400W 5600S
04400W 5700S 05000W 6600S 06716W 6644S 6716W
PART 3 FORECAST ISSUED 00:00 UTC VALID UNTIL 00:00 UTC 2025-12-13
COASTAL AREAS:
INNER RIO DE LA PLATA: SECTOR N 5 WITH GUSTS BACK SECTOR W BY 12/0600 DECR VRB 4
BY 12/1800 PROB OF HVY STORMS IMPR TOWARDS MORNING VIS POOR OCNL MODERATE TO
GOOD
OUTER RIO DE LA PLATA: SECTOR E 5 WITH GUSTS BACK SECTOR N BY 12/0600 TEMPO BACK
SECTOR W BY 12/1200 PROB OF HVY STORMS IMPR TOWARDS MORNING VIS POOR OCNL
MODERATE TO GOOD
URUGUAY SOUTH EAST COASTS: SECTOR E 5 WITH GUSTS BACK SECTOR N BY 12/0300 TEMPO
BACK SECTOR W BY 12/1500 PROB OF ISOL STORMS IMPR TOWARDS THE END OF THE PERIOD
VIS MODERATE TO GOOD
MAR DEL PLATA COASTS(3617S - 3830S): VRB 4 INCR SECTOR N 5 BY 12/0900 BACK SW
BY 12/2100 PROB OF HVY STORMS IMPR STARTING EARLY MORNING VIS POOR OCNL MODERATE
TO GOOD
RINCON BAHIA BLANCA COASTS(3830S - 41S): SE 5 WITH GUSTS BACK SECTOR N 6 WITH
GUSTS BY 12/0300 BACK SECTOR W BY 12/1200 LOW PROB OF ISOL STORMS IMPR STARTING
EARLY MORNING VIS MODERATE TO GOOD
PENINSULA DE VALDES COASTS(41S - 45S): SECTOR N 6 WITH GUSTS BACK SECTOR W BY
12/0300 LOW PROB OF ISOL RAIN STARTING EARLY MORNING VIS GOOD TO MODERATE
GOLFO DE SAN JORGE COASTS(45S - 48S): SECTOR W 7 GUST WITH 8 INTENSITY LOW
PROB OF ISOL RAIN STARTING EARLY MORNING VIS GOOD TO MODERATE
SOUTH PATAGONIA COASTS(48S - 54S): SECTOR W 7 GUST WITH 8 INTENSITY INCR 8
WITH GUSTS BY 12/1200 PROB OF RAIN ISOL SH VIS VERY POOR TO POOR
FIN DEL MUNDO COASTS(54S - 55S): SECTOR W 7 GUST WITH 8 INTENSITY INCR 8 WITH
GUSTS BY 12/1200 PROB OF RAIN NXT HVY RAIN STARTING EVENING VIS VERY POOR TO
POOR
ISLAS MALVINAS COASTS: SECTOR N 6 WITH GUSTS BACK SECTOR W 6 WITH GUSTS BY
12/0900 VEER SECTOR N BY 12/2100 PROB OF RAIN ISOL SH SPELLS OF GOOD WEATHER VIS
MODERATE OCNL POOR
OCEANIC AREAS:
NORTH AREA (35S- 40S AND 20W- 55W) E OF 35W: SECTOR N 8 WITH GUSTS BACK SECTOR W
7 GUST WITH 8 INTENSITY BY 12/2300 PROB OF RAIN STORMS VIS VERY POOR
W OF 35 - E OF 45W: SECTOR S 7 GUST WITH 8 INTENSITY VEER SECTOR W BY 12/1800
PROB OF RAIN VIS POOR OCNL VERY POOR
REST OF THE AREA: SECTOR W 4 DECR VRB 3 BY 12/0900 INCR SECTOR N 5 BY 12/1500
LOW PROB OF ISOL STORMS STARTING EARLY MORNING IMPR TOWARDS EVENING VIS GOOD
OCNL MODERATE
CENTRAL EAST AREA (40S- 50S AND 20W- 40W) E OF 30 - N OF 45S: NE 6/7 GUST WITH 8
INTENSITY BACK N BY 12/1200 PROB OF HVY RAIN VIS POOR OCNL VERY POOR
E OF 30 - S OF 45S: VRB 5/4 INCR SE 6 WITH GUSTS BY 12/1200 PROB OF RAIN VIS
MODERATE TO POOR
W OF 30 - N OF 45S: SECTOR S 6/7 GUST WITH 8 INTENSITY PROB OF RAIN VIS POOR
REST OF THE AREA: SECTOR E 5 WITH GUSTS BACK SECTOR N BY 12/2300 PROB OF ISOL
RAIN IMPR TOWARDS MORNING VIS MODERATE TO GOOD
CENTRAL WEST AREA (40S- 50S AND 40W- 60W) E OF 50 - N OF 45S: SECTOR S 6 WITH
GUSTS VEER SECTOR W 5 BY 12/1200 LOW PROB OF ISOL RAIN IMPR TOWARDS MORNING VIS
MODERATE TO GOOD
E OF 50 - S OF 45S: SECTOR E 5 BACK SECTOR N 6 WITH GUSTS BY 12/1200 PROB OF
ISOL RAIN VIS MODERATE
W OF 50 - N OF 45S: NW 5/6 WITH GUSTS DECR VRB 3 BY 12/1200 VIS GOOD
REST OF THE AREA: SECTOR N 6 WITH GUSTS BACK SECTOR W BY 12/1200 VEER SECTOR N
BY 12/2300 LOW PROB OF ISOL RAIN STARTING EARLY MORNING VIS GOOD TO MODERATE
SOUTH EAST AREA (50S- 60S AND 20W- 40W) E OF 30W: NE 5 DECR VRB 4/3 BY 12/0600
LOW PROB OF RAIN AND SNOW MIXTURE IMPR TOWARDS EVENING VIS MODERATE OCNL GOOD
REST OF THE AREA: SECTOR W 5 DECR VRB 4/3 BY 12/0600 INCR NE 5/6 WITH GUSTS BY
12/2100 LOW PROB OF RAIN AND SNOW MIXTURE SPELLS OF GOOD WEATHER VIS MODERATE
OCNL GOOD
SOUTH WEST AREA (50S- 60S AND 40W- 60W) E OF 50W: SECTOR N 5/6 WITH GUSTS INCR 7
BY 12/1500 PROB OF ISOL RAIN VIS MODERATE OCNL POOR
REST OF THE AREA: SECTOR N 6 WITH GUSTS BACK SECTOR W BY 12/1200 VEER SECTOR N
BY 12/2100 PROB OF RAIN VIS MODERATE OCNL POOR
DRAKE AREA (55S- 60S AND 60W- 67W): SECTOR E 6 WITH GUSTS BACK SECTOR W BY
12/0600 VEER SECTOR E BY 12/2100 PROB OF RAIN VIS POOR
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1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
00:00 UTC 12, DECEMBER 2025.
NATIONAL WEATHER SERVICE (NWS)
SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS
PART 1 GALE WARNING:
1450/2025 STRONG BARIC GRADIENT NORTHER BELLINGSHAUSEN SEA MOV S DEEPENING PROVOKES WINDS FORCE 8 FROM SE IN 60S-64S 70W-90W
1451/2025 STRONG BARIC GRADIENT SOUTHERN PORTION OF DRAKE STRAIT MOV E DEEPENING PROVOKES WINDS FORCE 8 FROM SECTOR E IN 60S-64S 50W-70W UNTIL 13/0600
1452/2025 STRONG BARIC GRADIENT MAR DE LA FLOTA COASTS MOV E DEEPENING PROVOKES WINDS FORCE 8 FROM SECTOR E IN 60S-64S 50W-70W
1453/2025 STRONG BARIC GRADIENT GERLACHE STRAIT MARGARITA BAY MOV E DEEPENING PROVOKES WINDS FORCE 8 FROM SECTOR E IN 64S-70S 60W-70W
1454/2025 STRONG BARIC GRADIENT NORTHERN WEDDELL SEA MOV E DEEPENING WILL PROVOKE WINDS FORCE 8 FROM SECTOR N IN 60S-64S 50W-60W
PART 2 GENERAL SYNOPSIS AT 21:00UTC
LOW 976HPA 64S 55W MOV SE DPN
LOW 990HPA 67S 90W MOV SE DPN
111400 UTC 1.SEA ICE LIMIT 6000S 02000W 6018S 02013W 5946S 02759W 5636S 02538W 5728S 02924W 5803S 03403W 5927S 04120W 6009S 04759W 5854S 05008W 6056S 05459W 6249S 06019W 6619S 06716W 2.ICEBERGS GREATER THAN 10NM A23A 5240S 03958W 32X24NM A74A 5620S 02516W 27X13NM A77 5104S 04117W 27X4NM A76C 5922S 03731W 16X7NM B15AB 5707S 04430W 10X4NM 3.ICEBERGS SMALLER THAN 10NM ICEBERG1 5330S 04044W 9X2NM ICEBERG2 5258S 03920W 7X3NM ICEBERG3 5234S 04115W 3X3NM ICEBERG4 5132S 03452W 2X1NM ICEBERG5 5131S 03755W 4X2NM ICEBERG6 5236S 03704W 3X1NM ICEBERG7 5300S 03953W 4X1NM ICEBERG8 4949S 03459W 2X1NM ICEBERG9 5032S 02156W 3X1NM ICEBERG10 5216S 04144W 2X1NM ICEBERG11 5348S 04208W 4X1NM ICEBERG12 5031S 03850W 5X4NM ICEBERG13 5110S 03526W 8X2NM ICEBERG14 5218S 04056W 7X2NM ICEBERG15 5237S 03936W 4X2NM ICEBERG16 4953S 02905W 2X1NM ICEBERG17 5214S 04006W 4X2NM ICEBERG18 5233S 04008W 4X1NM ICEBERG19 5228S 04001W 2X1NM ICEBERG20 5235S 04016W 3X2NM ICEBERG215237S 04013W 2X1NM ICEBERG22 5215S 03959W 2X2NM ICEBERG23 5321S 04014W 11X3NM ICEBERG24 5241S 04013W 2X1NM ICEBERG25 5235S 04033W 3X1NM ICEBERG26 5035S 03850W 3X1NM ICEBERG27 5029S 03855W 4X1NM ICEBERG28 5254S 03953W 2X1NM 4.ICEBERGS AREA A 6102S 02000W 4500S 02000W 4800S 03400W 5826S 03400W B 5826S 03400W 4900S 03400W 4900S 04000W 5200S 04400W 6010S 4400W C 6010S 04400W 5600S 04400W 5700S 05000W 6600S 06716W 6644S 6716W
PART 3 FORECAST ISSUED 00:00 UTC VALID UNTIL 00:00 UTC 2025-12-13
COASTAL AREAS:
SOUTHERN PORTION OF DRAKE STRAIT W OF 60W: SECTOR E 8 DECR BY 12/0600 PROB OF ISOL SNOW FALL PROB OF MIST FOG PATCHES VIS MODERATE TO POOR OCNL VERY POOR
SOUTHERN PORTION OF DRAKE STRAIT REST OF THE AREA: SECTOR E 8 DECR BY 12/0600 PROB OF ISOL SNOW FALL PROB OF MIST FOG PATCHES VIS MODERATE TO POOR OCNL VERY POOR
MAR DE LA FLOTA COASTS W OF 60W: SECTOR E 8 PROB OF SNOW FALL PROB OF MIST FOG PATCHES VIS MODERATE TO POOR OCNL VERY POOR
MAR DE LA FLOTA COASTS REST OF THE AREA: SECTOR E 8 PROB OF SNOW FALL PROB OF MIST FOG PATCHES VIS MODERATE TO POOR OCNL VERY POOR
GERLACHE STRAIT : SECTOR E 8 PROB OF ISOL SNOW FALL VIS GOOD TO MODERATE OCNL POOR
MARGARITA BAY : SECTOR E 9 PROB OF ISOL SNOW FALL VIS GOOD TO MODERATE OCNL POOR
EREBUS Y TERROR GULF : SECTOR E 3/4 PROB OF SNOW FALL PROB OF MIST FOG PATCHES VIS MODERATE TO POOR OCNL VERY POOR
OCEANIC AREAS:
NORTHER BELLINGSHAUSEN SEA (60-66S 70-90W): SE 8 PROB OF MIST FOG PATCHES PROB OFISOL SNOW FALL VIS MODERATE TO POOR OCNL VERY POOR
SOUTHERN BELLINGSHAUSEN SEA (66-73S 70-90W): SECTOR S 3/4 PROB OF MIST PROB OFISOL SNOW FALL VIS GOOD TO MODERATE OCNL POOR
NORTHERN WEDDELL SEA (60-68S 20-50W): NE 3/5 PROB OF MIST FOG PATCHES PROB OFISOL SNOW FALL VIS MODERATE TO POOR OCNL VERY POOR
SOUTHERN WEDDELL SEA (68-78S 20-60W): NE 3/4 PROB OF MIST PROB OFISOL SNOW FALL VIS GOOD TO MODERATE OCNL POOR=