1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
2025-12-13, 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
BETWEEN 50S-55S AND 50W-60W
PART 2 GENERAL SYNOPSIS AT 09:00UTC
121400 UTC 1.SEA ICE LIMIT 5949S 02000W 5624S 02747W 5800S 03130W 5914S 04218W
6000S 04408W 6009S 04630W 6059S 04743W 6023S 04947W 6105S 05351W 6159S 05507W
6401S 06128W 6615S 06716W 2.ICEBERGS GREATER THAN 10NM A23A 5244S 03954W 32X24NM
A74A 5638S 02444W 27X13NM A77 5050S 04103W 27X4NM A76C 5925S 03729W 16X7NM B15AB
5714S 04413W 10X4NM 3.ICEBERGS SMALLER THAN 10NM ICEBERG1 5317S 04104W 9X2NM
ICEBERG2 5306S 03920W 7X3NM ICEBERG3 5233S 04124W 2X2NM ICEBERG4 5128S 03506W
2X1NM ICEBERG5 5138S 03733W 4X2NM ICEBERG6 5236S 03704W 3X1NM ICEBERG7 5308S
03959W 4X1NM ICEBERG8 5008S 03453W 2X1NM ICEBERG9 5059S 02226W 3X1NM ICEBERG10
5216S 04114W 2X1NM ICEBERG11 5351S 04159W 4X1NM ICEBERG12 5029S 03843W 5X4NM
ICEBERG13 5057S 03545W 8X2NM ICEBERG14 5214S 04051W 7X2NM ICEBERG15 5237S 03932W
4X2NM ICEBERG16 4953S 02905W 2X1NM ICEBERG17 5221S 04010W 4X2NM ICEBERG18 5243S
04013W 4X1NM ICEBERG19 5235S 04005W 2X1NM ICEBERG20 5250S 04007W 3X2NM ICEBERG21
5253S 04004W 2X1NM ICEBERG22 5216S 03958W 2X2NM ICEBERG23 5310S 04035W 11X3NM
ICEBERG24 5257S 04011W 2X1NM ICEBERG25 5234S 04043W 2X1NM ICEBERG26 5028S 03838W
3X1NM ICEBERG27 5037S 03848W 4X1NM ICEBERG28 5304S 03949W 2X1NM ICEBERG29 6048S
04529W 3X3NM 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
LOW 991HPA 42S 56W MOV SE DPN EXP 53S 32W BY 14/1200 EXTENDS CFNT AT 42S 56W 38S
58W MOV SE EXP 53S 32W 46S 31W 44S 39W BY 14/1200
LOW 981HPA 56S 45W MOV E WKN EXTENDS CFNT AT 56S 45W 51S 40W 48S 41W MOV SE
LOW 960HPA 55S 65W MOV SE WKN EXP 57S 54W BY 14/1200 EXTENDS OFNT AT 53S 62W 59S
68W 57S 45W
RIDGE 35S 37W 43S 34W MOV E
PART 3 FORECAST ISSUED 12:00 UTC VALID UNTIL 12:00 UTC 2025-12-14
COASTAL AREAS:
INNER RIO DE LA PLATA: VRB 3/4 VEER SECTOR E 4/5 BY 14/0000 INCR 5/6 WITH GUSTS
BY 14/1200 PROB OF RAIN STORMS STARTING NIGTH VIS GOOD TO POOR
OUTER RIO DE LA PLATA: VRB 3 VEER SECTOR E BY 14/0000 INCR 4/5 WITH GUSTS BY
14/0900 PROB OF RAIN STORMS STARTING NIGTH VIS GOOD TO POOR
URUGUAY SOUTH EAST COASTS: SECTOR N 3/4 VEER SECTOR S BACK SECTOR E 5/6 WITH
GUSTS BY 14/0000 PROB OF VIS GOOD TO MODERATE
MAR DEL PLATA COASTS(3617S - 3830S): SECTOR W 4/5 BACK VRB 3/4 BY 13/1800 BACK
SECTOR N 5/6 WITH GUSTS BY 14/0600 PROB OF RAIN STORMS IMPR STARTING NIGTH VIS
MODERATE
RINCON BAHIA BLANCA COASTS(3830S - 41S): SECTOR S 4 VEER VRB BY 13/1800 VEER
SECTOR N 5/6 WITH GUSTS BY 14/0300 PROB OF SH RAIN IMPR GRADUALLY VIS MODERATE
PENINSULA DE VALDES COASTS(41S - 45S): SECTOR W 6/7 WITH GUSTS VEER SECTOR N
4/5 WITH GUSTS BY 13/1800 BACK SECTOR W 5/6 WITH GUSTS BY 14/0600 LOW PROB OF SH
DURING THE EARLY MORNING VIS POOR TO MODERATE
GOLFO DE SAN JORGE COASTS(45S - 48S): SECTOR W 6/7 WITH GUSTS PROB OF SH RAIN
SPELLS OF GOOD WEATHER VIS POOR
SOUTH PATAGONIA COASTS(48S - 54S): SECTOR W 7/8 WITH GUSTS PROB OF SH RAIN VIS
VERY POOR
FIN DEL MUNDO COASTS(54S - 55S): SECTOR W 7/8 WITH GUSTS PROB OF SH RAIN VIS
VERY POOR.
ISLAS MALVINAS COASTS: SECTOR N 6/7 WITH GUSTS BACK SECTOR W 7/8 WITH GUSTS BY
13/1800 PROB OF SH RAIN VIS VERY POOR
OCEANIC AREAS:
NORTH AREA (35S- 40S AND 20W- 55W) E OF 40W: SECTOR W 7/6 WITH GUSTS BACK SECTOR
S 6/5 WITH GUSTS BY 13/1800 VEER SECTOR N 4 BY 14/0000 VIS POOR TO GOOD
REST OF THE AREA: SECTOR N 4/5 VEER VRB 3/4 BY 14/0000 WORSENING TOWARDS THE
END OF THE PERIOD VIS GOOD OCNL MODERATE
CENTRAL EAST AREA (40S- 50S AND 20W- 40W) E OF 30W: SECTOR S 7/6 WITH GUSTS VEER
SECTOR N BY 14/0300 PROB OF SH DURING THE MORNING NEXT WORSENING TOWARDS THE END
OF THE PERIOD VIS POOR
REST OF THE AREA: SECTOR N 5 INCR 6/7 WITH GUSTS BY 14/0000 PROB OF ISOL STORMS
STARTING NIGTH VIS GOOD TO POOR
CENTRAL WEST AREA (40S- 50S AND 40W- 60W): NW 4 BACK SECTOR W 5/6 WITH GUSTS BY
13/1500 VEER NW 6/7 WITH GUSTS BY 14/0300 PROB OF SH RAIN IMPR STARTING NIGTH
VIS MODERATE TO POOR
SOUTH EAST AREA (50S- 60S AND 20W- 40W) E OF 30W: SECTOR N 3/4 INCR 5/6 WITH
GUSTS BY 13/2100 INCR 6/7 WITH GUSTS BY 14/1200 PROB OF RAIN VIS MODERATE TO
POOR
REST OF THE AREA: SECTOR N 6/7 WITH GUSTS VEER VRB 3/4 BY 14/0000 PROB OF RAIN
VIS POOR TO MODERATE
SOUTH WEST AREA (50S- 60S AND 40W- 60W) E OF 50W: SECTOR W 5 VEER SECTOR N 5/6
WITH GUSTS BY 13/1800 INCR 6/7 WITH GUSTS BY 14/1200 PROB OF RAIN IMPR STARTING
EVENING VIS MODERATE TO POOR
W OF 50W - N OF 55S: SECTOR N 5/6 WITH GUSTS INCR 6/7 WITH GUSTS BY 13/1800
BACK NW 7/8 WITH GUSTS BY 14/0000 PROB OF SH RAIN VIS VERY POOR TO POOR
REST OF THE AREA: SECTOR N 5 VEER SECTOR E 5/4 BY 13/1800 VEER SECTOR S BY
14/0900 PROB OF SH RAIN SPELLS OF GOOD WEATHER VIS MODERATE
DRAKE AREA (55S- 60S AND 60W- 67W): SECTOR E 4 VEER SECTOR S BY 14/0000 PROB OF
RAIN AND SNOW MIXTURE VIS MODERATE
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1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
12:00 UTC 13, DECEMBER 2025.
NATIONAL WEATHER SERVICE (NWS)
SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS
PART 1 GALE WARNING:
1465/2025 STRONG BARIC GRADIENT MAR DE LA FLOTA COASTS PROVOKES WINDS FORCE 8 FROM SECTOR E IN 62S-64S 50W-70W UNTIL 13/1800
1466/2025 STRONG BARIC GRADIENT GERLACHE STRAIT MARGARITA BAY MOV E DEEPENING PROVOKES WINDS FORCE 8 FROM SECTOR E IN 64S-70S 60W-70W UNTIL 14/0000
1467/2025 STRONG BARIC GRADIENT NORTHERN WEDDELL SEA MOV E DEEPENING PROVOKES WINDS FORCE 8 FROM SECTOR E IN 60S-64S 30W-50W
PART 2 GENERAL SYNOPSIS AT 09:00UTC
LOW 976HPA 64S 55W MOV SE DPN EXTENDS CFNT AT 64S 55W 62S 50W 60S 45W
HIGH 1004HPA 67S 30W MOV SE WKN
121400 UTC 1.SEA ICE LIMIT 5949S 02000W 5624S 02747W 5800S 03130W 5914S 04218W 6000S 04408W 6009S 04630W 6059S 04743W 6023S 04947W 6105S 05351W 6159S 05507W 6401S 06128W 6615S 06716W 2.ICEBERGS GREATER THAN 10NM A23A 5244S 03954W 32X24NM A74A 5638S 02444W 27X13NM A77 5050S 04103W 27X4NM A76C 5925S 03729W 16X7NM B15AB 5714S 04413W 10X4NM 3.ICEBERGS SMALLER THAN 10NM ICEBERG1 5317S 04104W 9X2NM ICEBERG2 5306S 03920W 7X3NM ICEBERG3 5233S 04124W 2X2NM ICEBERG4 5128S 03506W 2X1NM ICEBERG5 5138S 03733W 4X2NM ICEBERG6 5236S 03704W 3X1NM ICEBERG7 5308S 03959W 4X1NM ICEBERG8 5008S 03453W 2X1NM ICEBERG9 5059S 02226W 3X1NM ICEBERG10 5216S 04114W 2X1NM ICEBERG11 5351S 04159W 4X1NM ICEBERG12 5029S 03843W 5X4NM ICEBERG13 5057S 03545W 8X2NM ICEBERG14 5214S 04051W 7X2NM ICEBERG15 5237S 03932W 4X2NM ICEBERG16 4953S 02905W 2X1NM ICEBERG17 5221S 04010W 4X2NM ICEBERG18 5243S 04013W 4X1NM ICEBERG19 5235S 04005W 2X1NM ICEBERG20 5250S 04007W 3X2NM ICEBERG21 5253S 04004W 2X1NM ICEBERG22 5216S 03958W 2X2NM ICEBERG23 5310S 04035W 11X3NM ICEBERG24 5257S 04011W 2X1NM ICEBERG25 5234S 04043W 2X1NM ICEBERG26 5028S 03838W 3X1NM ICEBERG27 5037S 03848W 4X1NM ICEBERG28 5304S 03949W 2X1NM ICEBERG29 6048S 04529W 3X3NM 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 12:00 UTC VALID UNTIL 12:00 UTC 2025-12-14
COASTAL AREAS:
SOUTHERN PORTION OF DRAKE STRAIT W OF 60W: SECTOR E 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 E 3/4 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 DECR 4 BY 13/1800 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 DECR 4 BY 13/1800 PROB OF SNOW FALL PROB OF MIST FOG PATCHES VIS MODERATE TO POOR OCNL VERY POOR
GERLACHE STRAIT : SECTOR E 8 DECR 3 BY 14/0000 PROB OF ISOL SNOW FALL VIS GOOD TO MODERATE OCNL POOR
MARGARITA BAY : SECTOR E 8 DECR 3 BY 14/0000 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
NORTHER BELLINGSHAUSEN SEA (60-66S 70-90W): SECTOR S 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 S 3/4 PROB OF MIST FOG PATCHES PROB OFISOL SNOW FALL VIS GOOD TO MODERATE OCNL VERY POOR
NORTHERN WEDDELL SEA (60-68S 20-50W): SECTOR E 8 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 FOG PROB OFISOL SNOW FALL VIS GOOD TO MODERATE OCNL POOR=