1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
2025-12-10, 00:00 UTC.
NATIONAL WEATHER SERVICE
SEA ICE AND ICEBERGS ISSUED BY SHN
PRESSURE HPA
BEAUFORT SCALE WINDS.
PART 1 GALE WARNING:
WARNING 489: STRONG BARIC GRADIENT ON MOV E WILL PROVOKE WINDS FORCE 8 FROM NE
WITH GUST BETWEEN 45S-55S 50W-30W FROM 10/1200
WARNING 488: LOW 996HPA AT 29S 50W MOV SE DEEPENING EXPECTED 35S 46W BY 11/0000
WILL PROVOKE WINDS FORCE 8 AROUND ITSELF WITH GUST BETWEEN 35S-40S 50W-35W FROM
10/1500
PART 2 GENERAL SYNOPSIS AT 21:00UTC
091400 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 5237S 03958W 32X24NM
A74A 5555S 02549W 27X13NM A77 5150S 04152W 27X4NM A76C 5918S 03740W 16X7NM B15AB
5718S 04546W 10X4NM 3.ICEBERGS SMALLER THAN 10NM ICEBERG1 5340S 04036W 9X2NM
ICEBERG2 5255S 03914W 7X3NM ICEBERG3 5239S 04110W 3X3NM ICEBERG4 5129S 03522W
2X1NM ICEBERG5 5127S 03803W 4X2NM ICEBERG6 5247S 03652W 3X1NM ICEBERG7 5249S
03949W 4X1NM ICEBERG8 4928S 03527W 2X1NM ICEBERG9 5346S 04007W 2X1NM ICEBERG10
5126S 04102W 2X1NM ICEBERG11 5032S 02156W 3X1NM ICEBERG12 5218S 04112W 2X1NM
ICEBERG13 5353S 04208W 4X1NM ICEBERG14 5022S 03838W 9X6NM ICEBERG15 5118S 03633W
8X2NM ICEBERG16 5224S 04101W 7X2NM ICEBERG17 5244S 03943W 4X2NM ICEBERG18 4958S
02936W 2X1NM ICEBERG19 5207S 04002W 4X2NM ICEBERG20 5224S 04002W 4X1NM ICEBERG21
5225S 03959W 2X1NM ICEBERG22 5205S 03940W 2X1NM ICEBERG23 5230S 04014W 3X2NM
ICEBERG24 5233S 04013W 2X1NM ICEBERG25 5207S 03956W 2X1NM ICEBERG26 5211S 03958W
2X2NM ICEBERG27 5326S 03959W 11X3NM ICEBERG28 5248S 03908W 3X1NM ICEBERG29 5235S
04015W 2X1NM ICEBERG30 5234S 04029W 3X1NM 4.ICEBERGS AREA A 4600S 02000W 6200S
02000W 4600S 04500W 6100S 04500W B 5900S 06000W 6400S 06000W 5200S 04500W 6100S
04500W C 5900S 06000W 6400S 06000W 6300S 06716W 6800S 06716W
LOW 996HPA 29S 50W MOV SE DPN EXP 35S 46W BY 11/0000
RIDGE 38S 45W 38S 51W 37S 56W
CFNT AT SOUTH PATAGONIA COASTS MOV E
RIDGE 49S 38W 55S 40W 59S 43W MOV E
PART 3 FORECAST ISSUED 00:00 UTC VALID UNTIL 00:00 UTC 2025-12-11
COASTAL AREAS:
INNER RIO DE LA PLATA: SECTOR E 5/4 VEER SECTOR S BY 10/0600 DECR VRB 3 BY
10/1800 LOW PROB OF ISOL RAIN IMPR DURING THE EARLY MORNING VIS MODERATE OCNL
GOOD
OUTER RIO DE LA PLATA: SECTOR E 5 DECR VRB 4/3 BY 10/1500 LOW PROB OF ISOL RAIN
IMPR DURING THE EARLY MORNING VIS MODERATE OCNL GOOD
URUGUAY SOUTH EAST COASTS: SECTOR E 6 WITH GUSTS VEER SECTOR S BY 10/0900 PROB
OF RAIN IMPR TOWARDS EVENING VIS MODERATE OCNL POOR TO GOOD
MAR DEL PLATA COASTS(3617S - 3830S): SECTOR N 5 WITH GUSTS DECR VRB 4 BY
10/1800 PROB OF MIST DURING THE EARLY MORNING ISOL STORMS DURING THE EVENING VIS
GOOD OCNL MODERATE
RINCON BAHIA BLANCA COASTS(3830S - 41S): SECTOR E 5 BACK SECTOR N BY 10/0300
BACK SE BY 10/1500 PROB OF RAIN STORMS SPELLS OF GOOD WEATHER VIS MODERATE OCNL
GOOD
PENINSULA DE VALDES COASTS(41S - 45S): NW 5 BACK SECTOR S BY 10/1200 BACK
SECTOR E BY 10/1800 PROB OF ISOL RAIN STORMS IMPR DURING THE EARLY MORNING VIS
MODERATE TO GOOD
GOLFO DE SAN JORGE COASTS(45S - 48S): SECTOR W 6/5 WITH GUSTS BACK SECTOR S BY
10/1500 BACK SECTOR E BY 10/2100 PROB OF ISOL RAIN STORMS IMPR STARTING EARLY
MORNING VIS MODERATE TO GOOD
SOUTH PATAGONIA COASTS(48S - 54S) N OF 51S: SECTOR E 5/4 WITH GUSTS BACK
SECTOR N 6/7 GUST WITH 8 INTENSITY BY 10/1500 PROB OF ISOL RAIN STORMS SPELLS OF
GOOD WEATHER VIS MODERATE OCNL POOR
SOUTH PATAGONIA COASTS(48S - 54S) REST OF THE AREA: SECTOR W 6 WITH GUSTS VEER
SECTOR N 6/7 GUST WITH 8 INTENSITY BY 10/1800 PROB OF ISOL RAIN VIS MODERATE
OCNL POOR
FIN DEL MUNDO COASTS(54S - 55S): SECTOR W 6/7 GUST WITH 8 INTENSITY VEER
SECTOR N BY 10/1800 PROB OF ISOL RAIN SPELLS OF GOOD WEATHER VIS MODERATE OCNL
POOR
ISLAS MALVINAS COASTS: SECTOR S 5 VEER SECTOR W 6 WITH GUSTS BY 10/0300 PROB OF
ISOL RAIN SPELLS OF GOOD WEATHER VIS MODERATE OCNL GOOD
OCEANIC AREAS:
NORTH AREA (35S- 40S AND 20W- 55W) E OF 35W: SECTOR W 6/5 WITH GUSTS DECR VRB 4
BY 10/1800 LOW PROB OF DRIZZLE IMPR DURING THE MORNING VIS MODERATE TO GOOD
W OF 35 - E OF 45W: SECTOR N 5 WITH GUSTS VEER SECTOR E 6 WITH GUSTS BY 10/0900
INCR 8 WITH GUSTS BY 10/1500 PROB OF HVY RAIN STORMS STARTING EVENING VIS GOOD
TO VERY POOR
W OF 45 - E OF 50W: SECTOR N 5 WITH GUSTS VEER SECTOR E 7/8 WITH GUSTS BY
10/1500 VEER SECTOR S BY 10/2100 PROB OF HVY RAIN STORMS STARTING EARLY MORNING
VIS GOOD TO VERY POOR
REST OF THE AREA: SECTOR N 5 VEER SECTOR E BY 10/0600 VEER SECTOR S BY 10/2100
VIS GOOD OCNL MODERATE
CENTRAL EAST AREA (40S- 50S AND 20W- 40W) E OF 30W: SW 7/6 GUST WITH 8 INTENSITY
DECR VRB 5/4 BY 10/2100 PROB OF RAIN AND SNOW MIXTURE SPELLS OF GOOD WEATHER VIS
POOR OCNL VERY POOR TO MODERATE
W OF 30 - N OF 45S: SECTOR N 5/6 WITH GUSTS LOW PROB OF ISOL RAIN IMPR DURING
THE MORNING VIS MODERATE TO GOOD
REST OF THE AREA: VRB 4 INCR NE 6 WITH GUSTS BY 10/0600 INCR 8 WITH GUSTS BY
10/1800 PROB OF RAIN AND SNOW MIXTURE STARTING EARLY MORNING VIS GOOD TO VERY
POOR
CENTRAL WEST AREA (40S- 50S AND 40W- 60W) E OF 50 - N OF 45S: NW 5/6 WITH GUSTS
LOW PROB OF ISOL RAIN IMPR DURING THE EARLY MORNING VIS MODERATE TO GOOD
E OF 50 - S OF 45S: NE 6/7 GUST WITH 8 INTENSITY BACK W 6 WITH GUSTS BY 10/1500
PROB OF RAIN IMPR TOWARDS THE END OF THE PERIOD VIS POOR OCNL VERY POOR TO
MODERATE
W OF 50 - N OF 45S: SECTOR N 5/4 BACK SECTOR W BY 10/2100 LOW PROB OF ISOL RAIN
DURING THE EARLY MORNING VIS GOOD OCNL MODERATE
REST OF THE AREA: SECTOR W 6/5 WITH GUSTS BACK SECTOR S BY 10/0900 BACK SECTOR
E BY 10/2100 PROB OF ISOL RAIN SPELLS OF GOOD WEATHER VIS MODERATE OCNL GOOD
SOUTH EAST AREA (50S- 60S AND 20W- 40W) E OF 30W: SECTOR S 7/6 GUST WITH 8
INTENSITY VEER SECTOR W BY 10/1500 PROB OF RAIN AND SNOW MIXTURE SPELLS OF GOOD
WEATHER VIS POOR OCNL VERY POOR TO MODERATE
W OF 30 - N OF 55S: VRB 3/4 INCR NE 6/7 WITH GUSTS BY 10/1200 INCR 8 WITH GUSTS
BY 10/1800 PROB OF RAIN AND SNOW MIXTURE STARTING EARLY MORNING VIS GOOD TO VERY
POOR
REST OF THE AREA: VRB 3/4 INCR NE 6 WITH GUSTS BY 10/1200 LOW PROB OF RAIN AND
SNOW MIXTURE IMPR TOWARDS MORNING VIS MODERATE
SOUTH WEST AREA (50S- 60S AND 40W- 60W) E OF 50 - N OF 55S: NE 6/7 WITH GUSTS
INCR 8 WITH GUSTS BY 10/1200 BACK SECTOR W 6 WITH GUSTS BY 10/2100 PROB OF RAIN
AND SNOW MIXTURE VIS MODERATE TO VERY POOR
E OF 50 - S OF 55S: NE 6/7 GUST WITH 8 INTENSITY BACK SECTOR W 6 WITH GUSTS BY
10/2100 PROB OF RAIN AND SNOW MIXTURE STARTING EARLY MORNING VIS MODERATE TO
POOR OCNL VERY POOR
REST OF THE AREA: SECTOR N 7/6 WITH GUSTS BACK SECTOR W 5/6 WITH GUSTS BY
10/0300 PROB OF RAIN AND SNOW MIXTURE IMPR STARTING EVENING VIS POOR OCNL VERY
POOR TO MODERATE
DRAKE AREA (55S- 60S AND 60W- 67W): SECTOR W 6 WITH GUSTS VEER SECTOR N 5 BY
10/2100 PROB OF ISOL RAIN SPELLS OF GOOD WEATHER VIS MODERATE OCNL GOOD
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1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
12:00 UTC 09, DECEMBER 2025.
NATIONAL WEATHER SERVICE (NWS)
SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS
PART 1 GALE WARNING:
1436/2025 STRONG BARIC GRADIENT SOUTHERN BELLINGSHAUSEN SEA MOV E DEEPENING PROVOKES WINDS FORCE 8 FROM SECTOR E IN 66S-70S 70W-90W
1437/2025 STRONG BARIC GRADIENT SOUTHERN PORTION OF DRAKE STRAIT MAR DE LA FLOTA COASTS MOV E WEAKENING PROVOKES WINDS FORCE 8 FROM NE IN 60S-64S 60W-70W UNTIL 09/2100
1438/2025 STRONG BARIC GRADIENT GERLACHE STRAIT MOV E DEEPENING PROVOKES WINDS FORCE 8 IN 64S-66S 60W-70W
1439/2025 STRONG BARIC GRADIENT SOUTHERN PORTION OF DRAKE STRAIT MAR DE LA FLOTA COASTS MOV E WEAKENING WILL PROVOKE WINDS FORCE 8 FROM NE IN 60S-64S 50W-60W FROM 09/2100
PART 2 GENERAL SYNOPSIS AT 09:00UTC
HIGH 1016HPA 60S 45W MOV E INTSF
LOW 966HPA 62S 85W MOV E DPN EXTENDS CFNT AT 62S 85W 62S 75W 60S 65W
LOW 1001HPA 60S 64W MOV E DPN
081400 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 5233S 03957W 32X24NM A74A 5545S 02606W 27X13NM A77 5215S 04243W 27X4NM A76C 5915S 03753W 16X7NM B15AB 5718S 04546W 10X4NM 3.ICEBERGS SMALLER THAN 10NM ICEBERG1 5347S 04035W 9X2NM ICEBERG2 5253S 03913W 7X3NM ICEBERG3 5252S 04050W 3X3NM ICEBERG4 5129S 03522W 2X1NM ICEBERG5 5123S 03805W 4X2NM ICEBERG6 5247S 03652W 3X1NM ICEBERG7 5249S 04001W 4X1NM ICEBERG8 4925S 03552W 2X1NM ICEBERG9 5346S 04007W 2X1NM ICEBERG10 5126S 04102W 2X1NM ICEBERG11 5032S 02156W 3X1NM ICEBERG12 5218S 04103W 2X1NM ICEBERG13 5404S 04147W 4X1NM ICEBERG14 5024S 03833W 9X6NM ICEBERG15 5118S 03633W 8X2NM ICEBERG16 5218S 04057W 7X2NM ICEBERG17 5246S 03948W 4X2NM ICEBERG18 4958S 02936W 2X1NM ICEBERG19 5204S 03959W 4X2NM ICEBERG20 5219S 03959W 4X1NM ICEBERG21 5218S 03954W 2X1NM ICEBERG22 5206S 03937W 2X1NM ICEBERG23 5228S 04015W 3X2NM ICEBERG24 5230S 04016W 2X1NM ICEBERG25 5207S 03957W 2X1NM ICEBERG26 5207S 03953W 2X2NM ICEBERG27 5328S 03944W 11X3NM ICEBERG28 5246S 03904W 3X1NM ICEBERG29 5245S 03949W 4X2NM 4.ICEBERGS AREA A 6120S 02000W 4520S 02000W 4445S 03940W 5840S 03950W B 5840S 03950W 4220S 03910W 5315S 05010W 6015S 05100W C 6015S 05100W 5700S 05040W 6300S 06716W 6730S 06716W
PART 3 FORECAST ISSUED 12:00 UTC VALID UNTIL 12:00 UTC 2025-12-10
COASTAL AREAS:
SOUTHERN PORTION OF DRAKE STRAIT W OF 60W: NE 8 TEMPO BACK SECTOR N 3 BY 09/2100 PROB OF ISOL SNOW FALL PROB OF MIST FOG PATCHES VIS GOOD TO MODERATE OCNL VERY POOR
SOUTHERN PORTION OF DRAKE STRAIT REST OF THE AREA: NE 3/4 INCR 8 BY 09/2100 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: NE 8 BACK SECTOR N 3 BY 09/2100 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: NE 3/4 INCR 8 BY 09/2100 PROB OF ISOL SNOW FALL PROB OF MIST FOG PATCHES VIS MODERATE TO POOR OCNL VERY POOR
GERLACHE STRAIT : NE 8 PROB OF ISOL SNOW FALL PROB OF MIST FOG PATCHES VIS MODERATE TO POOR OCNL VERY POOR
MARGARITA BAY : NE 4/5 PROB OF ISOL SNOW FALL WORSENING TOWARDS THE END OF THE PERIOD VIS GOOD OCNL POOR
EREBUS Y TERROR GULF : NE 4/5 PROB OF ISOL SNOW FALL PROB OF MIST FOG PATCHES WORSENING TOWARDS NIGTH VIS MODERATE TO POOR OCNL VERY POOR
OCEANIC AREAS:
NORTHER BELLINGSHAUSEN SEA (60-66S 70-90W): SECTOR E 3/5 PROB OF MIST FOG PATCHES PROB OFISOL SNOW FALL VIS MODERATE TO POOR OCNL VERY POOR
SOUTHERN BELLINGSHAUSEN SEA (66-73S 70-90W): SECTOR E 3/5 PROB OF MIST FOG PATCHES PROB OFISOL SNOW FALL VIS MODERATE TO POOR OCNL VERY POOR
NORTHERN WEDDELL SEA (60-68S 20-50W): SECTOR N 3/4 PROB OF MIST FOG PATCHES WORSENING TOWARDS NIGTH VIS GOOD TO MODERATE OCNL VERY POOR
SOUTHERN WEDDELL SEA (68-78S 20-60W): SECTOR W 3/4 PROB OF FOG VIS GOOD TO MODERATE OCNL VERY POOR=