1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
2025-12-20, 12:00 UTC.
NATIONAL WEATHER SERVICE
SEA ICE AND ICEBERGS ISSUED BY SHN
PRESSURE HPA
BEAUFORT SCALE WINDS.
PART 1
NO WARNINGS
PART 2 GENERAL SYNOPSIS AT 09:00UTC
CFNT AT 51S 71W 54S 67W 60S 66W MOV E
HIGH 1020HPA 41S 40W MOV E INTSF EXP 41S 25W BY 21/1200
LOW 1005HPA 40S 58W MOV E WKN EXTENDS CFNT AT 34S 61W 37S 59W 39S 58W MOV E
201400 UTC 1.SEA ICE LIMIT 6014S 02000W 6045S 02459W 6012S 03114W 5936S 03936W
6026S 04547W 6217S 04820W 6107S 05236W 6237S 05841W 6357S 06233W 6502S 06425W
6527S 06549W 6617S 06717W 2.ICEBERGS GREATER THAN 10NM A23A 5257S 04007W 32X24NM
A74A 5900S 02311W 27X13NM A77 4920S 03936W 27X4NM A76C 5943S 03717W 16X7NM B15AB
5716S 04305W 10X4NM 3.ICEBERGS SMALLER THAN 10NM ICEBERG1 5319S 04126W 9X2NM
ICEBERG2 5331S 03921W 7X3NM ICEBERG3 5210S 04127W 2X2NM ICEBERG4 5138S 03521W
2X1NM ICEBERG5 5246S 03726W 3X1NM ICEBERG6 5305S 04027W 4X1NM ICEBERG7 5055S
03443W 3X1NM ICEBERG8 5214S 04044W 2X1NM ICEBERG9 5351S 04122W 4X1NM ICEBERG10
5001S 03912W 5X4NM ICEBERG11 5010S 03457W 8X2NM ICEBERG12 5234S 03939W 4X2NM
ICEBERG13 4956S 02943W 2X1NM ICEBERG14 5305S 04023W 4X2NM ICEBERG15 5240S 04007W
4X1NM ICEBERG16 5252S 03934W 3X2NM ICEBERG17 5254S 03948W 2X1NM ICEBERG18 5232S
03949W 2X2NM ICEBERG19 5228S 04158W 9X3NM ICEBERG20 5301S 03949W 2X1NM ICEBERG21
5215S 04026W 2X1NM ICEBERG22 4954S 03731W 4X1NM ICEBERG23 5254S 03938W 2X1NM
ICEBERG24 6048S 04529W 3X3NM ICEBERG25 6137S 04727W 4X3NM ICEBERG26 6102S 05136W
7X2NM ICEBERG27 4944S 03923W 2X1NM ICEBERG28 4938S 03817W 3X1NM ICEBERG29 5001S
03854W 3X1NM ICEBERG30 5305S 03945W 3X1NM 4.ICEBERGS AREA A 6000S 02000W 4400S
02000W 4400S 03400W 6000S 03500W B 6000S 03500W 4400S 03400W 4800S 04100W 4100S
06100W C 4100S 06120W 4800S 04100W 6300S 06716W 6700S 06716W
PART 3 FORECAST ISSUED 12:00 UTC VALID UNTIL 12:00 UTC 2025-12-21
COASTAL AREAS:
INNER RIO DE LA PLATA: SECTOR W 3 BACK NE BY 20/1500 PROB OF SH STORMS SPELLS OF
GOOD WEATHER VIS MODERATE TO POOR OCNL GOOD
OUTER RIO DE LA PLATA: N 5 WITH GUSTS BACK NE 3 BY 20/1500 PROB OF SH STORMS
SPELLS OF GOOD WEATHER VIS MODERATE TO POOR OCNL GOOD
URUGUAY SOUTH EAST COASTS: SECTOR N 6/7 WITH GUSTS DECR BY 20/2100 PROB OF SH
STORMS TOWARDS NIGTH VIS GOOD TO POOR
MAR DEL PLATA COASTS(3617S - 3830S): SECTOR N 5/3 WITH GUSTS PROB OF SH STORMS
IMPR STARTING NIGTH VIS MODERATE TO GOOD OCNL POOR
RINCON BAHIA BLANCA COASTS(3830S - 41S): SECTOR N 6/4 WITH GUSTS BACK SECTOR W
4 WITH GUSTS BY 20/1800 PROB OF ISOL STORMS SPELLS OF GOOD WEATHER VIS MODERATE
TO GOOD OCNL POOR
PENINSULA DE VALDES COASTS(41S - 45S): SECTOR W 4/5 WITH GUSTS PROB OF ISOL
RAIN SPELLS OF GOOD WEATHER VIS GOOD OCNL MODERATE
GOLFO DE SAN JORGE COASTS(45S - 48S): SECTOR W 5/6 WITH GUSTS PROB OF ISOL
RAIN STARTING EVENING VIS GOOD TO MODERATE
SOUTH PATAGONIA COASTS(48S - 54S): SECTOR W 4 BACK SECTOR N 5 WITH GUSTS BY
20/1500 PROB OF RAIN STARTING NIGTH VIS GOOD TO POOR
FIN DEL MUNDO COASTS(54S - 55S): SECTOR W 5/7 GUST WITH 8 INTENSITY PROB OF
ISOL RAIN SPELLS OF GOOD WEATHER VIS MODERATE TO POOR OCNL GOOD
ISLAS MALVINAS COASTS: SECTOR N 3/4 WITH GUSTS BACK SECTOR S BY 20/1800 PROB OF
SH IMPR DURING THE EVENING VIS MODERATE TO GOOD
OCEANIC AREAS:
NORTH AREA (35S- 40S AND 20W- 55W) E OF 40W: SECTOR S 5 WITH GUSTS BACK SECTOR N
4 BY 20/1500 PROB OF ISOL RAIN IMPR TOWARDS NIGTH VIS MODERATE TO GOOD
W OF 40 - E OF 50W: SECTOR N 5/6 WITH GUSTS PROB OF ISOL SH STORMS TOWARDS
EVENING VIS GOOD TO MODERATE
REST OF THE AREA: SECTOR N 6/4 WITH GUSTS PROB OF SH STORMS SPELLS OF GOOD
WEATHER VIS MODERATE TO POOR OCNL GOOD
CENTRAL EAST AREA (40S- 50S AND 20W- 40W) S OF 45 - W OF 30W: SECTOR W 5/4 WITH
GUSTS VEER SECTOR N 7 GUST WITH 8 INTENSITY BY 21/0000 PROB OF RAIN TOWARDS THE
END OF THE PERIOD VIS GOOD TO POOR
S OF 45 - E OF 30W: SECTOR W 5 WITH GUSTS PROB OF ISOL RAIN TOWARDS THE END OF
THE PERIOD VIS GOOD TO MODERATE
REST OF THE AREA: SECTOR S 4 WITH GUSTS BACK SECTOR N 6 WITH GUSTS BY 20/1800
PROB OF ISOL RAIN IMPR DURING THE EVENING VIS MODERATE TO GOOD
CENTRAL WEST AREA (40S- 50S AND 40W- 60W) S OF 45 - E OF 50W: SECTOR N 5/7 GUST
WITH 8 INTENSITY PROB OF RAIN VIS POOR
N OF 45 - E OF 50W: SECTOR N 5/7 WITH GUSTS PROB OF RAIN VIS MODERATE TO POOR
REST OF THE AREA: SECTOR N 6/5 WITH GUSTS BACK SECTOR W 4 WITH GUSTS BY 20/2100
PROB OF RAIN IMPR TOWARDS THE END OF THE PERIOD VIS POOR TO GOOD
SOUTH EAST AREA (50S- 60S AND 20W- 40W): SECTOR W 5/6 WITH GUSTS PROB OF RAIN
SNOW FALL SPELLS OF GOOD WEATHER VIS MODERATE TO POOR OCNL GOOD
SOUTH WEST AREA (50S- 60S AND 40W- 60W): SECTOR W 5/6 WITH GUSTS PROB OF ISOL
RAIN RAIN AND SNOW MIXTURE VIS MODERATE
DRAKE AREA (55S- 60S AND 60W- 67W): SECTOR W 7 GUST WITH 8 INTENSITY DECR BY
21/0600 PROB OF RAIN VIS POOR
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1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
12:00 UTC 20, DECEMBER 2025.
NATIONAL WEATHER SERVICE (NWS)
SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS
PART 1
NO WARNINGS
PART 2 GENERAL SYNOPSIS AT 09:00UTC
LOW 976HPA 66S 90W MOV E DPN EXTENDS CFNT AT 66S 90W 64S 85W 60S 85W
LOW 983HPA 65S 45W MOV E WKN
201400 UTC 1.SEA ICE LIMIT 6014S 02000W 6045S 02459W 6012S 03114W 5936S 03936W 6026S 04547W 6217S 04820W 6107S 05236W 6237S 05841W 6357S 06233W 6502S 06425W 6527S 06549W 6617S 06717W 2.ICEBERGS GREATER THAN 10NM A23A 5257S 04007W 32X24NM A74A 5900S 02311W 27X13NM A77 4920S 03936W 27X4NM A76C 5943S 03717W 16X7NM B15AB 5716S 04305W 10X4NM 3.ICEBERGS SMALLER THAN 10NM ICEBERG1 5319S 04126W 9X2NM ICEBERG2 5331S 03921W 7X3NM ICEBERG3 5210S 04127W 2X2NM ICEBERG4 5138S 03521W 2X1NM ICEBERG5 5246S 03726W 3X1NM ICEBERG6 5305S 04027W 4X1NM ICEBERG7 5055S 03443W 3X1NM ICEBERG8 5214S 04044W 2X1NM ICEBERG9 5351S 04122W 4X1NM ICEBERG10 5001S 03912W 5X4NM ICEBERG11 5010S 03457W 8X2NM ICEBERG12 5234S 03939W 4X2NM ICEBERG13 4956S 02943W 2X1NM ICEBERG14 5305S 04023W 4X2NM ICEBERG15 5240S 04007W 4X1NM ICEBERG16 5252S 03934W 3X2NM ICEBERG17 5254S 03948W 2X1NM ICEBERG18 5232S 03949W 2X2NM ICEBERG19 5228S 04158W 9X3NM ICEBERG20 5301S 03949W 2X1NM ICEBERG21 5215S 04026W 2X1NM ICEBERG22 4954S 03731W 4X1NM ICEBERG23 5254S 03938W 2X1NM ICEBERG24 6048S 04529W 3X3NM ICEBERG25 6137S 04727W 4X3NM ICEBERG26 6102S 05136W 7X2NM ICEBERG27 4944S 03923W 2X1NM ICEBERG28 4938S 03817W 3X1NM ICEBERG29 5001S 03854W 3X1NM ICEBERG30 5305S 03945W 3X1NM 4.ICEBERGS AREA A 6000S 02000W 4400S 02000W 4400S 03400W 6000S 03500W B 6000S 03500W 4400S 03400W 4800S 04100W 4100S 06100W C 4100S 06120W 4800S 04100W 6300S 06716W 6700S 06716W
PART 3 FORECAST ISSUED 12:00 UTC VALID UNTIL 12:00 UTC 2025-12-21
COASTAL AREAS:
SOUTHERN PORTION OF DRAKE STRAIT W OF 60W: NE 3/4 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 N 3/4 VEER SECTOR E 4 BY 20/1800 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 W 3/4 PROB OF ISOL SNOW FALL PROB OF MIST FOG PATCHES VIS MODERATE TO POOR OCNL VERY POOR
MAR DE LA FLOTA COASTS REST OF THE AREA: SECTOR N 3/4 VEER SECTOR E 4 BY 21/0000 PROB OF ISOL SNOW FALL PROB OF MIST FOG PATCHES VIS MODERATE TO POOR OCNL VERY POOR
GERLACHE STRAIT : SECTOR N 3/4 PROB OF ISOL SNOW FALL PROB OF MIST TOWARDS MORNING IMPR VIS MODERATE TO GOOD
MARGARITA BAY : SECTOR N 3/4 VEER SECTOR E 4 BY 21/0300 VIS GOOD
EREBUS Y TERROR GULF : SECTOR E 3/4 PROB OF MIST FOG PATCHES VIS MODERATE TO POOR OCNL VERY POOR
OCEANIC AREAS:
NORTHER BELLINGSHAUSEN SEA (60-66S 70-90W): SECTOR W 3/4 VEER SECTOR E 4 BY 20/1800 PROB OF ISOL SNOW FALL PROB OF MIST FOG PATCHES VIS MODERATE TO POOR OCNL VERY POOR
SOUTHERN BELLINGSHAUSEN SEA (66-73S 70-90W): SECTOR E 3/4 PROB OF MIST FOG PATCHES PROB OFISOL SNOW FALL VIS MODERATE TO POOR OCNL VERY POOR
NORTHERN WEDDELL SEA (60-68S 20-50W): NW 3/4 PROB OF MIST FOG PATCHES PROB OFISOL SNOW FALL TOWARDS NIGTH WORSENING VIS MODERATE TO POOR OCNL VERY POOR
SOUTHERN WEDDELL SEA (68-78S 20-60W): NW 3/4 PROB OF MIST VIS GOOD TO MODERATE OCNL POOR=