1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
2025-12-5, 00:00 UTC.
NATIONAL WEATHER SERVICE
SEA ICE AND ICEBERGS ISSUED BY SHN
PRESSURE HPA
BEAUFORT SCALE WINDS.
PART 1 GALE WARNING:
WARNING 484: LOW 984HPA AT 51S 34W MOV SE DEEPENING EXPECTED 53S 20W BY 05/2100
PROVOKES WINDS FORCE 8 FROM SECTOR W WITH GUST BETWEEN 50S-55S AND 20W-30W UNTIL
05/1200
PART 2 GENERAL SYNOPSIS AT 21:00UTC
041400 UTC 1.SEA ICE LIMIT 5830S 02000W 5611S 02546W 5736S 02958W 5833S 03142W
5757S 03800W 5736S 04312W 5753S 04820W 5927S 05314W 6038S 05517W 6141S 05718W
6411S 06356W 6637S 06716W 2.ICEBERGS GREATER THAN 10NM A23A 5226S 04009W 32X24NM
A74A 5516S 02633W 27X17NM A77 5240S 04248W 27X4NM A76C 5907S 03838W 16X7NM B15AB
5751S 04634W 11X4NM A23G 5331S 03849W 11X3NM 3.ICEBERGS SMALLER THAN 10NM
ICEBERG1 5448S 04006W 9X2NM ICEBERG2 5124S 03440W 3X1NM ICEBERG3 5255S 03906W
7X3NM ICEBERG4 5053S 03708W 6X2NM ICEBERG5 5204S 03847W 3X3NM ICEBERG6 5136S
04102W 2X2NM ICEBERG7 5301S 04030W 3X3NM ICEBERG8 5146S 03617W 2X1NM ICEBERG9
5121S 03818W 4X2NM ICEBERG10 5300S 03703W 3X1NM ICEBERG11 5242S 04011W 4X1NM
ICEBERG12 5159S 04142W 2X1NM ICEBERG13 4935S 03809W 2X1NM ICEBERG14 4928S 03716W
2X1NM ICEBERG15 5159S 04144W 3X1NM ICEBERG16 5346S 04007W 2X1NM ICEBERG17 5133S
04113W 2X1NM ICEBERG18 5154S 04141W 2X2NM ICEBERG19 5057S 02122W 3X1NM ICEBERG20
5215S 04058W 2X1NM ICEBERG21 5549S 04131W 4X1NM ICEBERG22 5015S 03825W 9X6NM
ICEBERG23 5118S 03633W 8X2NM ICEBERG24 5216S 04044W 7X2NM ICEBERG25 5232S 04020W
4X2NM ICEBERG26 5002S 02922W 2X1NM ICEBERG27 5159S 03950W 4X2NM ICEBERG28 5225S
03945W 4X1NM ICEBERG29 5233S 03942W 2X1NM ICEBERG30 5216S 03941W 2X1NM ICEBERG31
5217S 04003W 3X2NM ICEBERG32 5214S 04005W 2X1NM ICEBERG33 5203S 03954W 2X2NM
ICEBERG34 5159S 03955W 2X1NM 4.ICEBERGS AREA A 6000S 02000W 4657S 02000W 4600S
03100W 5900S 03200W B 5900S 03200W 4600S 03100W 4800S 04100W 5900S 04100W C
5900S 04100W 4800S 04100W 6000S 06716W 6600S 06716W
LOW 984HPA 51S 34W MOV SE DPN EXP 53S 20W BY 05/2100 EXTENDS CFNT AT 51S 34W 46S
27W
LOW 1005HPA 40S 54W MOV E DPN EXP 41S 37W BY 05/2100 EXTENDS STATIONARY FRONT AT
40S 54W 37S 57W
LOW 991HPA 55S 64W MOV SE EXP 59S 55W BY 05/2100 EXTENDS CFNT AT 55S 64W 50S 69W
MOV E
PART 3 FORECAST ISSUED 00:00 UTC VALID UNTIL 00:00 UTC 2025-12-6
COASTAL AREAS:
INNER RIO DE LA PLATA: NW 3/4 LOW PROB OF STORMS STARTING EVENING VIS GOOD OCNL
MODERATE
OUTER RIO DE LA PLATA: NW 3/4 BACK SECTOR E BY 5/2100 PROB OF STORMS STARTING
EARLY MORNING VIS GOOD TO MODERATE
URUGUAY SOUTH EAST COASTS: SECTOR N 5/4 PROB OF ISOL STORMS STARTING EARLY
MORNING VIS GOOD TO MODERATE
MAR DEL PLATA COASTS(3617S - 3830S): VRB 4/3 BACK SECTOR E 4 BY 5/1500 PROB OF
HVY STORMS SPELLS OF GOOD WEATHER VIS POOR OCNL MODERATE
RINCON BAHIA BLANCA COASTS(3830S - 41S): SECTOR S 4/3 BACK VRB 3 BY 5/0600
INCR SECTOR S 4/5 BY 5/1200 VIS GOOD
PENINSULA DE VALDES COASTS(41S - 45S): SECTOR E 4 BACK SECTOR S 4/5 BY 5/0900
VIS GOOD
GOLFO DE SAN JORGE COASTS(45S - 48S): SECTOR N 4 BACK SECTOR W 5 WITH GUSTS BY
5/0900 VIS GOOD
SOUTH PATAGONIA COASTS(48S - 54S) N OF 50S: SECTOR N 4 BACK SECTOR S BY 5/0900
VEER N BY 5/2100 VIS GOOD
SOUTH PATAGONIA COASTS(48S - 54S) REST OF THE AREA: SECTOR W 6 WITH GUSTS PROB
OF ISOL RAIN VIS POOR OCNL MODERATE
FIN DEL MUNDO COASTS(54S - 55S): SECTOR W 6/5 WITH GUSTS PROB OF RAIN VIS
POOR
ISLAS MALVINAS COASTS: SECTOR W 5/6 WITH GUSTS PROB OF RAIN VIS POOR
OCEANIC AREAS:
NORTH AREA (35S- 40S AND 20W- 55W) E OF 30W: SECTOR N 7 WITH GUSTS DECR 5 BY
5/2100 PROB OF ISOL RAIN STORMS VIS POOR
W OF 40W: SECTOR N 6/7 WITH GUSTS BACK VRB 4 BY 5/2100 PROB OF ISOL STORMS VIS
MODERATE OCNL POOR
REST OF THE AREA: SECTOR S 7/6 WITH GUSTS VEER NW 6/7 WITH GUSTS BY 5/1800 PROB
OF ISOL RAIN VIS POOR
CENTRAL EAST AREA (40S- 50S AND 20W- 40W) N OF 45S: NW 6/5 WITH GUSTS DECR VRB 4
BY 5/1800 PROB OF SH RAIN VIS POOR
E OF 30 - S OF 45S: NW 7/6 WITH GUSTS BACK SECTOR W 5/4 BY 5/0900 PROB OF SH
RAIN IMPR TOWARDS NIGTH VIS POOR TO MODERATE
REST OF THE AREA: SECTOR W 6/5 WITH GUSTS BACK SECTOR S 5/4 BY 5/1200 VIS
MODERATE TO GOOD
CENTRAL WEST AREA (40S- 50S AND 40W- 60W) E OF 50 - N OF 45S: SECTOR E 3 VEER
SECTOR S BY 5/1800 PROB OF SH RAIN IMPR DURING THE EVENING VIS POOR TO GOOD
E OF 50 - S OF 45S: SECTOR S 4 DECR VRB 3 BY 5/1200 VIS MODERATE TO GOOD
REST OF THE AREA: SECTOR W 4 VIS GOOD
SOUTH EAST AREA (50S- 60S AND 20W- 40W) E OF 30 - N OF 55S: SECTOR W 8 WITH
GUSTS BACK SECTOR S 6/5 BY 5/1500 PROB OF RAIN VIS VERY POOR TO POOR
W OF 30 - N OF 55S: SECTOR W 7 GUST WITH 8 INTENSITY BACK SECTOR S 6/5 BY
5/1200 PROB OF RAIN AND SNOW MIXTURE IMPR DURING THE EVENING VIS VERY POOR TO
MODERATE
REST OF THE AREA: SECTOR E 5 VEER SECTOR S BY 5/0900 VIS GOOD
SOUTH WEST AREA (50S- 60S AND 40W- 60W) E OF 50W: SECTOR S 5 BACK SECTOR N BY
5/1200 PROB OF RAIN AND SNOW MIXTURE STARTING EVENING VIS GOOD TO MODERATE OCNL
POOR
REST OF THE AREA: SECTOR N 4/5 VEER SECTOR W BY 5/1500 PROB OF RAIN AND SNOW
MIXTURE VIS POOR OCNL MODERATE
DRAKE AREA (55S- 60S AND 60W- 67W): SECTOR W 5/6 WITH GUSTS PROB OF RAIN AND
SNOW MIXTURE VIS POOR
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1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
12:00 UTC 04, DECEMBER 2025.
NATIONAL WEATHER SERVICE (NWS)
SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS
PART 1 GALE WARNING:
1414/2025 STRONG BARIC GRADIENT SOUTHERN BELLINGSHAUSEN SEA MOV E WEAKENING EXPECTED 65S 70W 70S 90W AROUND 04/1500 PROVOKES WINDS FORCE 8 FROM SECTOR E
1415/2025 STRONG BARIC GRADIENT MARGARITA BAY MOV E DEEPENING EXPECTED 66S 70W 50S 60W AROUND 05/0000 PROVOKES WINDS FORCE 8 FROM NE
1416/2025 STRONG BARIC GRADIENT GERLACHE STRAIT MOV E DEEPENING EXPECTED 64S 66W 50S 60W AROUND 04/1500 PROVOKES WINDS FORCE 8 FROM NE
PART 2 GENERAL SYNOPSIS AT 09:00UTC
RIDGE 70S 40W 65S 40W 60S 40W MOV E WKN
LOW 962HPA 62S 80W MOV E WKN
LOW 986HPA 62S 55W MOV E WKN EXTENDS CFNT AT
031400 UTC 1.SEA ICE LIMIT 58030S 020000W 56011S 025046W 57036S 029058W 58033S 031042W 57057S 038000W 57036S 043012W 57053S 048020W 59027S 053014W 60038S 055017W 61041S 057018W 64011S 063056W 66037S 067016W 2.ICEBERGS GREATER THAN 10NM A23A 52026S 040013W 32X24NM A74A 55008S 026033W 27X17NM A77 52045S 042036W 27X4NM A76C 59007S 038045W 16X7NM B15AB 57051S 046034W 11X4NM A23G 53030S 038047W 11X3NM 3.ICEBERGS SMALLER THAN 10NM ICEBERG1 54048S 040006W 9X2NM ICEBERG2 51024S 034040W 3X1NM ICEBERG3 52055S 039007W 7X3NM ICEBERG4 50053S 037008W 6X2NM ICEBERG5 52004S 038047W 3X3NM ICEBERG6 51044S 041013W 2X2NM ICEBERG7 53006S 040018W 3X3NM ICEBERG8 51046S 036017W 2X1NM ICEBERG9 51021S 038023W 4X2NM ICEBERG10 53003S 037011W 3X1NM ICEBERG11 52043S 040013W 4X1NM ICEBERG12 51059S 041042W 2X1NM ICEBERG13 49037S 038028W 2X1NM ICEBERG14 49028S 037016W 2X1NM ICEBERG15 51059S 041044W 3X1NM ICEBERG16 54002S 039059W 2X1NM ICEBERG17 51043S 041024W 2X1NM ICEBERG18 51054S 041041W 2X2NM ICEBERG19 51000S 021025W 3X1NM ICEBERG20 52015S 040058W 2X1NM ICEBERG21 55049S 041031W 4X1NM ICEBERG22 50018S 038013W 9X6NM ICEBERG23 51018S 036033W 8X2NM ICEBERG24 52017S 040041W 7X2NM ICEBERG25 52027S 040030W 4X2NM ICEBERG26 50002S 029022W 2X1NM ICEBERG27 51059S 039051W 4X2NM ICEBERG28 52029S 039049W 4X1NM ICEBERG29 52031S 039049W 2X1NM ICEBERG30 52016S 039041W 2X1NM ICEBERG31 52017S 040003W 3X2NM ICEBERG32 52014S 040005W 2X1NM ICEBERG33 52003S 039054W 2X2NM ICEBERG34 51059S 039055W 2X1NM 4.ICEBERGS AREA A0 60000S 020000W 46057S 020000W 46000S 031000W 59000S 032000W B0 59000S 032000W 46000S 031000W 48000S 041000W 59000S 041000W C0 59000S 041000W 48000S 041000W 60000S 067016W 66000S 067016W
PART 3 FORECAST ISSUED 12:00 UTC VALID UNTIL 12:00 UTC 2025-12-5
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: NE 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: NE 4/6 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 PROB OF ISOL SNOW FALL PROB OF MIST FOG PATCHES VIS MODERATE TO POOR OCNL VERY POOR
GERLACHE STRAIT : NE 8 DECR 4 BY 04/1500 PROB OF ISOL SNOW FALL PROB OF MIST VIS GOOD OCNL MODERATE
MARGARITA BAY : SECTOR E 8 DECR 5 BY 5/0000 VIS GOOD
EREBUS Y TERROR GULF : NE 3/4 PROB OF ISOL SNOW FALL PROB OF MIST FOG PATCHES VIS MODERATE TO POOR OCNL VERY POOR
OCEANIC AREAS:
NORTHER BELLINGSHAUSEN SEA (60-66S 70-90W): SECTOR S 3/4 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 8 PROB OF MIST FOG PATCHES PROB OFISOL SNOW FALL VIS GOOD TO MODERATE OCNL POOR
NORTHERN WEDDELL SEA (60-68S 20-50W): NE 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): NE 3/4 PROB OF MIST FOG PATCHES VIS MODERATE TO POOR OCNL VERY POOR=