1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
2025-12-12, 12:00 UTC.
NATIONAL WEATHER SERVICE
SEA ICE AND ICEBERGS ISSUED BY SHN
PRESSURE HPA
BEAUFORT SCALE WINDS.
PART 1 GALE WARNING:
WARNING 490: STRONG BARIC GRADIENT MOV E PROVOKES WINDS FORCE 8 FROM SECTOR W
WITH GUST IN SOUTH PATAGONIA COASTS FIN DEL MUNDO COASTS ISLAS MALVINAS COASTS
WARNING 488: LOW 981HPA AT 36S 35W MOV SE NOT CHANGE EXPECTED 43S 22W BY 13/1200
PROVOKES WINDS FORCE 8 FROM SECTOR N WITH GUST BETWEEN 35S-40S AND 20W-35W
PART 2 GENERAL SYNOPSIS AT 09:00UTC
LOW 981HPA 36S 35W MOV SE NC EXP 43S 22W BY 13/1200 EXTENDS OFNT AT 42S 34W 36S
43W 32S 36W MOV SE
LOW 996HPA 36S 56W MOV NE WKN
LOW 963HPA 58S 62W MOV SE WKN EXTENDS CFNT AT 58S 62W 59S 58W 44S 68W MOV NE
LOW 990HPA 48S 45W MOV SE WKN EXTENDS CFNT AT 48S 45W 40S 48W 36S 56W MOV NE
111400 UTC 1.LIMITE DE HIELO MARINO 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.TEMPANOS MAYORES A 10MN A23A 5240S 03958W
32X24MN A74A 5620S 02516W 27X13MN A77 5104S 04117W 27X4MN A76C 5922S 03731W
16X7MN B15AB 5707S 04430W 10X4MN 3.TEMPANOS MENORES A 10MN TEMPANO1 5330S
04044W
9X2MN TEMPANO2 5258S 03920W 7X3MN TEMPANO3 5234S 04115W 3X3MN TEMPANO4 5132S
03452W 2X1MN TEMPANO5 5131S 03755W 4X2MN TEMPANO6 5236S 03704W 3X1MN TEMPANO7
5300S 03953W 4X1MN TEMPANO8 4949S 03459W 2X1MN TEMPANO9 5032S 02156W 3X1MN
TEMANO10 5216S 04144W 2X1MN TEMPANO11 5348S 04208W 4X1MN TEMPANO12 5031S
03850W
5X4MN TEMPANO13 5110S 03526W 8X2MN TEMPANO14 5218S 04056W 7X2MN TEMPANO15
5237S
03936W 4X2MN TEMPANO16 4953S 02905W 2X1MN TEMPANO17 5214S 04006W 4X2MN
TEMPANO18
5233S 04008W 4X1MN TEMPANO19 5228S 04001W 2X1MN TEMPANO20 5235S 04016W 3X2MN
TEMPANO215237S 04013W 2X1MN TEMPANO22 5215S 03959W 2X2MN TEMPANO23 5321S
04014W
11X3MN TEMPANO24 5241S 04013W 2X1MN TEMPANO25 5235S 04033W 3X1MN TEMPANO26
5035S
03850W 3X1MN TEMPANO27 5029S 03855W 4X1MN TEMPANO28 5254S 03953W 2X1MN 4.AREA
DE
TEMPANOS 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 12:00 UTC VALID UNTIL 12:00 UTC 2025-12-13
COASTAL AREAS:
INNER RIO DE LA PLATA: W 3/4 VEER SECTOR N 4 VIS GOOD
OUTER RIO DE LA PLATA: SECTOR W 4 VEER SECTOR N 3/4 ISOL RAIN STORMS TOWARDS
EVENING IMPR VIS MODERATE TO GOOD
URUGUAY SOUTH EAST COASTS: SECTOR N 3/5 WITH GUSTS BACK SECTOR W 4/3 ISOL STORMS
TOWARDS EVENING IMPR VIS MODERATE TO GOOD
MAR DEL PLATA COASTS(3617S - 3830S): SECTOR N 3/4 VIS GOOD
RINCON BAHIA BLANCA COASTS(3830S - 41S): NW 3 VEER NE 3 BACK SECTOR W 4/6 WITH
GUSTS VIS GOOD TO MODERATE
PENINSULA DE VALDES COASTS(41S - 45S): SECTOR W 3/4 BACK SECTOR E 3 BACK
SECTOR W 3/6 WITH GUSTS PROB OF ISOL SH RAIN STARTING EARLY MORNING VIS GOOD TO
MODERATE OCNL POOR
GOLFO DE SAN JORGE COASTS(45S - 48S): SECTOR W 4/6 WITH GUSTS PROB OF ISOL
RAIN VIS MODERATE
SOUTH PATAGONIA COASTS(48S - 54S): SECTOR W 6/8 WITH GUSTS PROB OF ISOL RAIN
STORMS VIS POOR
FIN DEL MUNDO COASTS(54S - 55S): SECTOR W 6/8 WITH GUSTS VEER SECTOR N 6/4
WITH GUSTS BY 13/0000 PROB OF ISOL RAIN STORMS VIS POOR
ISLAS MALVINAS COASTS: SECTOR W 6/8 WITH GUSTS VEER SECTOR N 6 WITH GUSTS PROB
OF ISOL RAIN STORMS VIS POOR
OCEANIC AREAS:
NORTH AREA (35S- 40S AND 20W- 55W) E OF 35W: SECTOR N 8 WITH GUSTS PROB OF RAIN
STORMS VIS POOR
E OF 45W: SW 6/3 WITH GUSTS VEER W 3 PROB OF ISOL RAIN VIS MODERATE
REST OF THE AREA: W 3 VEER N 3/4 PROB OF ISOL SH RAIN TOWARDS NIGTH IMPR VIS
GOOD OCNL MODERATE
CENTRAL EAST AREA (40S- 50S AND 20W- 40W) N OF 45 - E OF 30W: N 6 GUST WITH 8
INTENSITY BACK SW 6 WITH GUSTS PROB OF STORMS VIS POOR
S OF 45 - E OF 30W: E 4/5 WITH GUSTS VEER S 6 WITH GUSTS PROB OF RAIN STORMS
TOWARDS THE END OF THE PERIOD IMPR VIS MODERATE OCNL POOR
N OF 45 - W OF 30W: S 6 WITH GUSTS VEER SECTOR W 3 PROB OF RAIN TOWARDS THE END
OF THE PERIOD IMPR VIS MODERATE OCNL POOR
REST OF THE AREA: SECTOR E 4 BACK SECTOR N 4 PROB OF ISOL RAIN STARTING NIGTH
IMPR VIS MODERATE
CENTRAL WEST AREA (40S- 50S AND 40W- 60W) E OF 50W: NW 3/5 WITH GUSTS PROB OF
ISOL SH RAIN TOWARDS THE END OF THE PERIOD VIS GOOD TO MODERATE
REST OF THE AREA: NW 6 WITH GUSTS TEMPO BACK W 4 PROB OF ISOL SH RAIN STARTING
EARLY MORNING VIS MODERATE OCNL POOR
SOUTH EAST AREA (50S- 60S AND 20W- 40W) E OF 30W: SECTOR E 3/4 PROB OF ISOL RAIN
AND SNOW MIXTURE TOWARDS THE END OF THE PERIOD IMPR VIS MODERATE
REST OF THE AREA: VRB 3 VEER SECTOR W 3 VEER SECTOR N 4/6 WITH GUSTS PROB OF
RAIN AND SNOW MIXTURE TOWARDS THE END OF THE PERIOD VIS MODERATE OCNL POOR
SOUTH WEST AREA (50S- 60S AND 40W- 60W): SECTOR N 6 WITH GUSTS TEMPO BACK SECTOR
W 5/4 WITH GUSTS PROB OF SH RAIN VIS MODERATE OCNL POOR
DRAKE AREA (55S- 60S AND 60W- 67W): W 5 WITH GUSTS VEER SECTOR N 5/4 BACK E 5
PROB OF RAIN VIS MODERATE
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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=