1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
2025-12-4, 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 992HPA AT 50S 51W MOV E DEEPENING EXPECTED 52S 34W BY 04/2100
WILL PROVOKE WINDS FORCE 8 FROM SECTOR W WITH GUST BETWEEN 45S-55S AND 30W-40W
FROM 04/1800
WARNING 483: STRONG BARIC GRADIENT MOV E PROVOKES WINDS FORCE 8 FROM SECTOR W
WITH GUST BETWEEN 45S-50S AND 20W-30W UNTIL 04/0900
PART 2 GENERAL SYNOPSIS AT 21:00UTC
LOW 992HPA 50S 51W MOV E DPN EXP 52S 34W BY 04/2100 EXTENDS CFNT AT 48S 52W 44S
56W MOV E
RIDGE 37S 27W 38S 33W 37S 45W MOV SE
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 00:00 UTC VALID UNTIL 00:00 UTC 2025-12-5
COASTAL AREAS:
INNER RIO DE LA PLATA: SECTOR N 3/4 VIS GOOD
OUTER RIO DE LA PLATA: SECTOR N 4 VIS GOOD
URUGUAY SOUTH EAST COASTS: NE 4/5 VIS GOOD
MAR DEL PLATA COASTS(3617S - 3830S): SECTOR N 4/5 BACK SECTOR S 4 BY 4/2100
PROB OF ISOL STORMS TOWARDS THE END OF THE PERIOD VIS GOOD TO MODERATE
RINCON BAHIA BLANCA COASTS(3830S - 41S): SECTOR N 4 BACK SECTOR S 4 BY 4/1200
PROB OF ISOL STORMS TOWARDS EVENING VIS GOOD OCNL MODERATE
PENINSULA DE VALDES COASTS(41S - 45S): NE 3/4 BACK SW 5/4 BY 4/1200 VIS GOOD
GOLFO DE SAN JORGE COASTS(45S - 48S): SECTOR N 4 BACK SECTOR W 4/5 WITH GUSTS
PROB OF ISOL RAIN IMPR TOWARDS EARLY MORNING VIS MODERATE TO GOOD
SOUTH PATAGONIA COASTS(48S - 54S) N OF 50S: VRB 3 VEER SECTOR N 5 BY 4/2100
PROB OF SH TOWARDS THE END OF THE PERIOD VIS GOOD TO MODERATE
SOUTH PATAGONIA COASTS(48S - 54S) REST OF THE AREA: NW 6 WITH GUSTS PROB OF SH
SPELLS OF GOOD WEATHER VIS MODERATE OCNL POOR
FIN DEL MUNDO COASTS(54S - 55S): NW 6 WITH GUSTS PROB OF SH SPELLS OF GOOD
WEATHER VIS MODERATE OCNL GOOD
ISLAS MALVINAS COASTS: SECTOR W 5 WITH GUSTS VEER NW 6 WITH GUSTS BY 4/1500 PROB
OF ISOL RAIN STARTING EVENING VIS GOOD OCNL MODERATE
OCEANIC AREAS:
NORTH AREA (35S- 40S AND 20W- 55W) E OF 35W: VRB 3 VEER SECTOR E 5/6 WITH GUSTS
BY 4/1500 PROB OF RAIN STARTING EARLY MORNING VIS MODERATE TO POOR
W OF 35 - E OF 45W: VRB 3 VIS GOOD
REST OF THE AREA: NW 5 WITH GUSTS PROB OF ISOL STORMS TOWARDS THE END OF THE
PERIOD VIS GOOD OCNL MODERATE
CENTRAL EAST AREA (40S- 50S AND 20W- 40W) E OF 30W: SECTOR W 8/7 WITH GUSTS PROB
OF SH RAIN VIS POOR TO MODERATE
W OF 30 - S OF 45S: SECTOR W 6 WITH GUSTS INCR 8 WITH GUSTS BY 4/1800 PROB OF
RAIN VIS POOR
REST OF THE AREA: NW 5/6 WITH GUSTS PROB OF RAIN TOWARDS THE END OF THE PERIOD
VIS MODERATE
CENTRAL WEST AREA (40S- 50S AND 40W- 60W) E OF 50 - N OF 45S: NW 5 WITH GUSTS
PROB OF ISOL RAIN STARTING EVENING VIS GOOD TO MODERATE
E OF 50 - S OF 45S: SECTOR W 6/7 GUST WITH 8 INTENSITY PROB OF RAIN VIS POOR
REST OF THE AREA: SECTOR W 5 WITH GUSTS DECR VRB 3 BY 4/1200 PROB OF ISOL SH
SPELLS OF GOOD WEATHER STARTING EARLY MORNING VIS GOOD OCNL MODERATE
SOUTH EAST AREA (50S- 60S AND 20W- 40W) E OF 30W: SECTOR S 7/6 WITH GUSTS PROB
OF SH OF SNOW VIS POOR
W OF 30 - N OF 55S: VRB 3 VEER NW 8 WITH GUSTS BY 4/1800 PROB OF RAIN SNOW FALL
STARTING EARLY MORNING VIS MODERATE TO VERY POOR
REST OF THE AREA: SECTOR S 6 WITH GUSTS VEER SECTOR E 4 BY 4/1500 PROB OF ISOL
SNOW FALL SPELLS OF GOOD WEATHER VIS MODERATE
SOUTH WEST AREA (50S- 60S AND 40W- 60W) E OF 50 - N OF 55S: VRB 3 VEER SECTOR W
6/7 GUST WITH 8 INTENSITY PROB OF RAIN SH RAIN AND SNOW MIXTURE VIS VERY POOR
E OF 50 - S OF 55S: NE 3/4 PROB OF SH OF SNOW VIS MODERATE
REST OF THE AREA: SW 4 VEER NW 4/5 BY 4/1500 PROB OF SH RAIN AND SNOW MIXTURE
IMPR TOWARDS MORNING VIS MODERATE
DRAKE AREA (55S- 60S AND 60W- 67W): NW 6/5 PROB OF SH RAIN VIS POOR OCNL
MODERATE
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1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
00:00 UTC 04, DECEMBER 2025.
NATIONAL WEATHER SERVICE (NWS)
SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS
PART 1 GALE WARNING:
1411/2025 STRONG BARIC GRADIENT SOUTHERN BELLINGSHAUSEN SEA MOV E WEAKENING PROVOKES WINDS FORCE 8 FROM SECTOR E IN 65S-70S 70W-90W UNTIL 04/1500
1412/2025 STRONG BARIC GRADIENT MARGARITA BAY MOV E DEEPENING PROVOKES WINDS FORCE 8 FROM NE IN 66S-70S 50W-60W
1413/2025 STRONG BARIC GRADIENT GERLACHE STRAIT MOV E DEEPENING PROVOKES WINDS FORCE 8 FROM NE IN 64S-66S 50W-60W UNTIL 04/1500
PART 2 GENERAL SYNOPSIS AT 21:00UTC
RIDGE 70S 40W 65S 42W 60S 43W MOV E WKN
LOW 958HPA 62S 80W MOV E WKN
LOW 986HPA 61S 55W MOV E WKN EXTENDS CFNT AT 61S 55W 60S 55W
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 00:00 UTC VALID UNTIL 00:00 UTC 2025-12-5
COASTAL AREAS:
SOUTHERN PORTION OF DRAKE STRAIT W OF 60W: SECTOR N 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 4/5 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 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 4/5 PROB OF ISOL SNOW FALL PROB OF MIST FOG PATCHES VIS MODERATE TO POOR OCNL VERY POOR
GERLACHE STRAIT : NE 8 PROB OF MIST VIS GOOD OCNL MODERATE
MARGARITA BAY : SECTOR E 8 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 E 4/5 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 8 PROB OF MIST 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 VIS GOOD OCNL MODERATE=