1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
12:00 UTC 18, NOVEMBER 2025.
NATIONAL WEATHER SERVICE (NWS)
SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS
PART 1 GALE WARNING:
1344/2025 STRONG BARIC GRADIENT ON MAR DE LA FLOTA COASTS EREBUS Y TERROR GULF MOV E DEEPENING PROVOKES WINDS FORCE 9 FROM SECTOR S IN 61S-65S 50W-60W
PART 2 GENERAL SYNOPSIS AT 09:00UTC
LOW 980HPA 64S 58W MOV E WKN
HIGH 70S 75W MOV N INTSF
171400 UTC 1.SEA ICE LIMIT 5845S 02000W 5840S 02051W 5734S 02600W 5830S 03035W 5842S 03526W 6009S 03712W 6028S 04110W 5927S 04647W 5933S 04854W 6118S 05341W 6334S 06059W 6605S 06716W 2.ICEBERGS GREATER THAN 10NM A23A 5247S 04016W 32X24NM A74A 5357S 02830W 27X17NM A77 5436S 04020W 27X4NM A76C 6011S 03842W 16X7NM B15AB 5804S 04548W 11X4NM A23G 5232S 03840W 11X3NM 3.ICEBERGS SMALLER THAN 10NM A23I 4951S 03906W 9X6NM A23J 5125S 03827W 8X2NM ICEBERG1 4951S 03106W 7X1NM ICEBERG2 5102S 03529W 3X1NM ICEBERG3 5517S 04231W 9X2NM ICEBERG4 5110S 03452W 3X1NM ICEBERG5 5224S 03856W 7X3NM ICEBERG6 5119S 04013W 2X2NM ICEBERG7 5217S 03747W 3X1NM ICEBERG8 5001S 02355W 4X2NM ICEBERG9 5222S 03735W 2X1NM ICEBERG10 5156S 03819W 2X1NM ICEBERG11 4928S 03225W 3X1NM ICEBERG12 6049S 04531W 3X2NM ICEBERG13 5124S 03357W 2X1NM ICEBERG14 5047S 03821W 6X2NM ICEBERG15 5149S 03840W 3X3NM ICEBERG16 5321S 03918W 2X2NM ICEBERG17 5249S 03801W 3X3NM ICEBERG18 5123S 03831W 2X1NM ICEBERG19 5159S 03910W 4X2NM ICEBERG20 4957S 02446W 2X1NM ICEBERG21 5249S 03846W 3X1NM ICEBERG22 5245S 03758W 3X1NM ICEBERG23 5236S 03936W 4X1NM ICEBERG24 5248S 03924W 2X1NM ICEBERG25 4943S 03905W 4X4NM ICEBERG26 5758S 04525W 3X1NM ICEBERG27 5320S 03913W 2X1NM 4.ICEBERGS AREA A 4500S 02000W 6000S 02000W 4600S 04000W 6100S 04000W B 6200S 05400W 6100S 04000W 4800S 04000W 6000S 05400W C 5600S 05400W 6200S 05400W 6400S 06716W 6800S 06716W
PART 3 FORECAST ISSUED 12:00 UTC VALID UNTIL 12:00 UTC 2025-11-19
COASTAL AREAS:
SOUTHERN PORTION OF DRAKE STRAIT W OF 60W: SECTOR S 3/4 VIS GOOD
SOUTHERN PORTION OF DRAKE STRAIT REST OF THE AREA: SECTOR S 4/5 PROB OF MIST PROB OFISOL SNOW FALL VIS GOOD TO MODERATE OCNL POOR
MAR DE LA FLOTA COASTS W OF 60W: SECTOR S 3/4 VIS GOOD
MAR DE LA FLOTA COASTS REST OF THE AREA: SECTOR S 8 PROB OF MIST PROB OFISOL SNOW FALL VIS GOOD TO MODERATE OCNL POOR
GERLACHE STRAIT : SECTOR N 3/4 VIS GOOD
MARGARITA BAY : SECTOR N 3/4 VIS GOOD
EREBUS Y TERROR GULF : SECTOR S 8 WITH GUSTS PROB OF MIST FOG PATCHES PROB OFISOL SNOW FALL VIS MODERATE TO POOR OCNL VERY POOR
OCEANIC AREAS:
NORTHER BELLINGSHAUSEN SEA (60-66S 70-90W): VRB 3 PROB OF MIST FOG PATCHES PROB OFISOL SNOW FALL VIS MODERATE TO POOR OCNL VERY POOR
SOUTHERN BELLINGSHAUSEN SEA (66-73S 70-90W): SECTOR N 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): SECTOR S 3/4 PROB OF MIST FOG PATCHES PROB OFISOL SNOW FALL VIS MODERATE TO POOR OCNL VERY POOR
SOUTHERN WEDDELL SEA (68-78S 20-60W): SECTOR S 3/4 PROB OF MIST FOG PATCHES PROB OFISOL SNOW FALL VIS GOOD TO MODERATE OCNL VERY POOR=
1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
2025-11-18, 00:00 UTC.
NATIONAL WEATHER SERVICE
SEA ICE AND ICEBERGS ISSUED BY SHN
PRESSURE HPA
BEAUFORT SCALE WINDS.
PART 1 GALE WARNING:
WARNING 467: STRONG BARIC GRADIENT ON PROVOKES WINDS FORCE 8 WITH GUST BETWEEN
35S-40S 55W-40W UNTIL 18/0600
WARNING 466: LOW 969HPA AT 50S 22W MOV SE DEEPENING EXPECTED BY 19/0000 PROVOKES
WINDS FORCE 9 AROUND ITSELF WITH GUST BETWEEN 45S-55S 30W-20W UNTIL 18/0600
WARNING 465: LOW 960HPA AT 50S 56W MOV E DEEPENING EXPECTED 50S 43W BY 19/0000
PROVOKES WINDS FORCE 9 AROUND ITSELF WITH GUST BETWEEN 40S-55S AND 60W-30W
WARNING 464: STRONG BARIC GRADIENT ON PROVOKES WINDS FORCE 9 FROM SW WITH GUST
IN GOLFO DE SAN JORGE COASTS SOUTH PATAGONIA COASTS FIN DEL MUNDO COASTS ISLAS
MALVINAS COASTS UNTIL 18/1800
WARNING 462: STRONG BARIC GRADIENT ON PROVOKES WINDS FORCE 8 FROM SECTOR N WITH
GUST BETWEEN 35S-45S AND 20W-30W UNTIL 18/0600
PART 2 GENERAL SYNOPSIS AT 21:00UTC
171400 UTC 1.SEA ICE LIMIT 5845S 02000W 5840S 02051W 5734S 02600W 5830S 03035W
5842S 03526W 6009S 03712W 6028S 04110W 5927S 04647W 5933S 04854W 6118S 05341W
6334S 06059W 6605S 06716W 2.ICEBERGS GREATER THAN 10NM A23A 5247S 04016W 32X24NM
A74A 5357S 02830W 27X17NM A77 5436S 04020W 27X4NM A76C 6011S 03842W 16X7NM B15AB
5804S 04548W 11X4NM A23G 5232S 03840W 11X3NM 3.ICEBERGS SMALLER THAN 10NM A23I
4951S 03906W 9X6NM A23J 5125S 03827W 8X2NM ICEBERG1 4951S 03106W 7X1NM ICEBERG2
5102S 03529W 3X1NM ICEBERG3 5517S 04231W 9X2NM ICEBERG4 5110S 03452W 3X1NM
ICEBERG5 5224S 03856W 7X3NM ICEBERG6 5119S 04013W 2X2NM ICEBERG7 5217S 03747W
3X1NM ICEBERG8 5001S 02355W 4X2NM ICEBERG9 5222S 03735W 2X1NM ICEBERG10 5156S
03819W 2X1NM ICEBERG11 4928S 03225W 3X1NM ICEBERG12 6049S 04531W 3X2NM ICEBERG13
5124S 03357W 2X1NM ICEBERG14 5047S 03821W 6X2NM ICEBERG15 5149S 03840W 3X3NM
ICEBERG16 5321S 03918W 2X2NM ICEBERG17 5249S 03801W 3X3NM ICEBERG18 5123S 03831W
2X1NM ICEBERG19 5159S 03910W 4X2NM ICEBERG20 4957S 02446W 2X1NM ICEBERG21 5249S
03846W 3X1NM ICEBERG22 5245S 03758W 3X1NM ICEBERG23 5236S 03936W 4X1NM ICEBERG24
5248S 03924W 2X1NM ICEBERG25 4943S 03905W 4X4NM ICEBERG26 5758S 04525W 3X1NM
ICEBERG27 5320S 03913W 2X1NM 4.ICEBERGS AREA A 4500S 02000W 6000S 02000W 4600S
04000W 6100S 04000W B 6200S 05400W 6100S 04000W 4800S 04000W 6000S 05400W C
5600S 05400W 6200S 05400W 6400S 06716W 6800S 06716W
LOW 969HPA 50S 22W MOV SE DPN EXP BY 19/0000 EXTENDS CFNT AT 47S 22W 42S 27W 40S
30W MOV E
LOW 960HPA 50S 56W MOV E DPN EXP 50S 43W BY 19/0000 EXTENDS CFNT AT 47S 53W 43S
55W 48S 58W MOV NE
CFNT AT PENINSULA DE VALDES COASTS MOV NE EXP OUTER RIO DE LA PLATA BY 18/1200
RIDGE 44S 40W 51S 40W 55S 42W
PART 3 FORECAST ISSUED 00:00 UTC VALID UNTIL 00:00 UTC 2025-11-19
COASTAL AREAS:
INNER RIO DE LA PLATA: SECTOR W 5/6 WITH GUSTS DECR VRB 4 BY 18/1500 INCR SECTOR
E 5 BY 18/2300 VIS GOOD
OUTER RIO DE LA PLATA: SECTOR W 6 GUST WITH 8 INTENSITY DECR VRB 4 BY 18/1500
INCR SECTOR S 5/6 WITH GUSTS BY 18/2100 VIS MODERATE TO GOOD
URUGUAY SOUTH EAST COASTS: SECTOR W 5/6 WITH GUSTS BACK SECTOR S BY 18/2100 VIS
GOOD
MAR DEL PLATA COASTS(3617S - 3830S): SECTOR W 6/7 GUST WITH 8 INTENSITY BACK
SECTOR S BY 18/0900 VIS MODERATE OCNL GOOD
RINCON BAHIA BLANCA COASTS(3830S - 41S): SECTOR W 6 GUST WITH 8 INTENSITY BACK
SECTOR S BY 18/0300 VIS POOR OCNL MODERATE
PENINSULA DE VALDES COASTS(41S - 45S): SECTOR S 7 GUST WITH 8 INTENSITY VEER
SECTOR W BY 18/0600 BACK SECTOR S BY 18/1800 LOW PROB OF ISOL SH RAIN DURING THE
MORNING VIS POOR OCNL VERY POOR
GOLFO DE SAN JORGE COASTS(45S - 48S): SW 9/8 WITH GUSTS BACK S 7 GUST WITH 8
INTENSITY BY 18/1800 PROB OF ISOL SH RAIN STARTING EARLY MORNING VIS VERY POOR
TO POOR
SOUTH PATAGONIA COASTS(48S - 54S): SW 9/8 WITH GUSTS DECR 7 WITH GUSTS BY
18/1800 PROB OF SH RAIN VIS VERY POOR TO POOR
FIN DEL MUNDO COASTS(54S - 55S): SW 8 WITH GUSTS BACK SECTOR S 7/6 GUST WITH 8
INTENSITY BY 18/0600 PROB OF RAIN AND SNOW MIXTURE VIS VERY POOR TO POOR OCNL
MODERATE
ISLAS MALVINAS COASTS: SW 9/8 WITH GUSTS BACK S 7/6 WITH GUSTS BY 18/1200 PROB
OF RAIN NEXT RAIN AND SNOW MIXTURE STARTING EVENING VIS VERY POOR TO POOR
OCEANIC AREAS:
NORTH AREA (35S- 40S AND 20W- 55W) E OF 30W: SECTOR N 8 WITH GUSTS DECR 7 WITH
GUSTS BY 18/0600 PROB OF RAIN STORMS VIS VERY POOR TO POOR
W OF 30 - E OF 40W: SECTOR S 6 WITH GUSTS VEER SECTOR W BY 18/0600 VEER SECTOR
N 6/7 GUST WITH 8 INTENSITY BY 18/1200 PROB OF RAIN STORMS SPELLS OF GOOD
WEATHER VIS POOR OCNL VERY POOR
REST OF THE AREA: NW 8 WITH GUSTS DECR 7 GUST WITH 8 INTENSITY BY 18/0600 BACK
SW BY 18/1200 LOW PROB OF ISOL RAIN VIS VERY POOR TO POOR
CENTRAL EAST AREA (40S- 50S AND 20W- 40W) E OF 30 - N OF 45S: SECTOR N 8 WITH
GUSTS BACK SECTOR W 6 WITH GUSTS BY 18/0600 VEER SECTOR N BY 18/1500 PROB OF
RAIN VIS VERY POOR TO POOR OCNL MODERATE
E OF 30 - S OF 45S: SECTOR W 9 WITH GUSTS DECR 7/6 BY 18/0600 VEER SECTOR N 6/7
WITH GUSTS BY 18/1500 PROB OF RAIN SPELLS OF GOOD WEATHER VIS VERY POOR TO
POOR
REST OF THE AREA: SECTOR W 6 WITH GUSTS VEER SECTOR N 8 WITH GUSTS BY 18/0900
PROB OF RAIN VIS MODERATE TO VERY POOR
CENTRAL WEST AREA (40S- 50S AND 40W- 60W) E OF 50W: SECTOR N 9 WITH GUSTS BACK
SECTOR W BY 18/0600 PROB OF RAIN VIS VERY POOR
W OF 50 - N OF 45S: SECTOR W 8 WITH GUSTS PROB OF SH RAIN VIS VERY POOR
REST OF THE AREA: SECTOR W 9 WITH GUSTS BACK SECTOR S 7 WITH GUSTS BY 18/2100
PROB OF RAIN NEXT RAIN AND SNOW MIXTURE TOWARDS THE END OF THE PERIOD VIS VERY
POOR OCNL POOR
SOUTH EAST AREA (50S- 60S AND 20W- 40W) E OF 30 - N OF 55S: SW 8/7 WITH GUSTS
VEER W 6 WITH GUSTS BY 18/0600 VEER SECTOR N 6/7 WITH GUSTS BY 18/1500 PROB OF
RAIN AND SNOW MIXTURE VIS VERY POOR TO POOR
E OF 30 - S OF 55S: SECTOR W 6 WITH GUSTS VEER SECTOR N BY 18/2100 PROB OF RAIN
AND SNOW MIXTURE VIS MODERATE OCNL POOR
W OF 30 - N OF 55S: SECTOR W 5 VEER SECTOR E 8 WITH GUSTS BY 18/0900 BACK
SECTOR N BY 18/2100 PROB OF RAIN AND SNOW MIXTURE STARTING EARLY MORNING VIS
MODERATE TO VERY POOR
REST OF THE AREA: SECTOR W 6 WITH GUSTS BACK SECTOR E 7 GUST WITH 8 INTENSITY
BY 18/2100 PROB OF RAIN AND SNOW MIXTURE VIS MODERATE TO POOR OCNL VERY POOR
SOUTH WEST AREA (50S- 60S AND 40W- 60W) E OF 50 - N OF 55S: SECTOR E 7/8 WITH
GUSTS VEER SECTOR S 9 WITH GUSTS BY 18/1200 PROB OF RAIN AND SNOW MIXTURE VIS
VERY POOR TO POOR
E OF 50 - S OF 55S: SECTOR E 5/6 WITH GUSTS VEER SECTOR S 7 GUST WITH 8
INTENSITY BY 18/1200 PROB OF SNOW FALL VIS MODERATE TO POOR OCNL VERY POOR
W OF 50 - N OF 55S: SECTOR E 7 GUST WITH 8 INTENSITY BACK W 8 WITH GUSTS BY
18/0300 BACK SECTOR S 7 GUST WITH 8 INTENSITY BY 18/0900 PROB OF RAIN AND SNOW
MIXTURE VIS POOR OCNL VERY POOR
REST OF THE AREA: SECTOR E 10 GUST WITH 8 INTENSITY VEER SECTOR S BY 18/1200
PROB OF RAIN AND SNOW MIXTURE VIS POOR OCNL VERY POOR
DRAKE AREA (55S- 60S AND 60W- 67W): SECTOR E 7/6 GUST WITH 8 INTENSITY VEER
SECTOR S BY 18/1200 PROB OF RAIN AND SNOW MIXTURE VIS POOR OCNL VERY POOR
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