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WWAA02 SAWB 251200

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SECURITE

WEATHER BULLETIN FOR SHIPPING - METAREA 6-

12:00 UTC 25, SEPTEMBER 2025.

NATIONAL WEATHER SERVICE (NWS)

SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS

PART 1 GALE WARNING:

1080/2025 STRONG BARIC GRADIENT ON SOUTHERN BELLINGSHAUSEN SEA MOV E WEAKENING PROVOKES WINDS FORCE 8 FROM SECTOR N GUST WITH 10 INTENSITY BY 25/2300 IN 60S-73S 70W-90W

1081/2025 STRONG BARIC GRADIENT SOUTHERN PORTION OF DRAKE STRAIT MAR DE LA FLOTA COASTS MOV E INTENSIFYING PROVOKES WINDS FORCE 8 FROM SECTOR W GUST WITH 10 INTENSITY IN 60S-63S 70W-50W

1082/2025 STRONG BARIC GRADIENT EREBUS Y TERROR GULF MOV E INTENSIFYING PROVOKES WINDS FORCE 8 FROM SECTOR W GUST WITH 9 INTENSITY IN 63S-65S 60W-50W

1083/2025 STRONG BARIC GRADIENT NORTHERN WEDDELL SEA PROVOKES WINDS FORCE 8 FROM SECTOR W IN 60S-64S 40W-50W

1084/2025 STRONG BARIC GRADIENT GERLACHE STRAIT WILL PROVOKE WINDS FORCE 8 FROM SECTOR N BY 25/1800 IN 63S-66S 70W-62W

PART 2 GENERAL SYNOPSIS AT 09:00UTC

LOW 976HPA 70S 78W MOV NE WKN EXTENDS CFNT AT 70S 78W 68S 75W 65S 65W

RIDGE 60S 55W 63S 55W 64S 60W MOV E WKN

LOW 992HPA 62S 80W MOV E DPN EXTENDS CFNT AT 62S 80W 61S 75W 60S 72W

LOW 1000HPA 65S 40W EXTENDS CFNT AT 65S 40W 63S 40W 60S 45W

241400 UTC 1.SEA ICE LIMIT 6321S 02000W 5558S 02210W 5556S 02532W 5608S 02944W 5725S 03329W 5848S 03806W 5924S 04326W 6030S 04757W 6230S 05547W 6155S 05910W 6522S 06606W 6320S 06716W 2.ICEBERGS GREATER THAN 10NM A23A 5311S 03705W 32X24NM A74A 5548S 04054W 27X17NM A77 5741S 04921W 27X4NM A76C 6002S 04442W 16X7NM B15AB 5936S 05050W 11X4NM A23G 5303S 03949W 20X8NM A23H 5323S 03943W 10X2NM A23I 5303S 03729W 19X8NM ICEBERG1 5139S 04052W 12X2NM 3.ICEBERGS SMALLER THAN 10NM A23E 5051S 03233W 9X4NM ICEBERG2 5310S 03928W 3X1NM ICEBERG3 5751S 04836W 9X2NM ICEBERG4 5320S 02900W 3X1NM ICEBERG5 5330S 03932W 4X1NM ICEBERG6 5019S 02636W 2X1NM ICEBERG7 4951S 02901W 3X3NM ICEBERG8 5740S 04858W 2X1NM ICEBERG9 5136S 03004W 3X1NM ICEBERG10 5241S 03654W 3X1NM ICEBERG11 5304S 04108W 9X4NM ICEBERG12 5128S 03831W 3X1NM ICEBERG13 5332S 03948W 7X3NM ICEBERG14 5152S 03114W 2X1NM ICEBERG15 5031S 02702W 2X1NM ICEBERG16 5009S 02836W 3X1NM ICEBERG17 5031S 02715W 6X4NM ICEBERG18 5234S 03649W 2X1NM ICEBERG19 5247S 03725W 2X2NM ICEBERG20 5205S 03648W 3X1NM ICEBERG21 5539S 04331W 3X1NM ICEBERG22 5641S 02855W 3X1NM 4.ICEBERGS AREA A: 5600S 02000W 4600S 02000W 4400S 02700W 5600S 02800W B: 5600S 02800W 4500S 02700W 5100S 04500W 6000S 04400W C: 6000S 04400W 5100S 04500W 6400S 06716W 6630S 06716W

PART 3 FORECAST ISSUED 12:00 UTC VALID UNTIL 12:00 UTC 2025-09-26

COASTAL AREAS:

SOUTHERN PORTION OF DRAKE STRAIT W OF 60W: SECTOR N 8 PROB OF ISOL SNOW FALL PROB OF MIST FOG PATCHES VIS VERY POOR TO POOR

SOUTHERN PORTION OF DRAKE STRAIT REST OF THE AREA: SECTOR W 8 PROB OF MIST FOG PATCHES PROB OFISOL SNOW FALL WORSENING TOWARDS THE END OF THE PERIOD VIS MODERATE TO POOR OCNL VERY POOR

MAR DE LA FLOTA COASTS W OF 60W: SECTOR N 8 PROB OF ISOL SNOW FALL PROB OF FOG MIST VIS VERY POOR TO POOR

MAR DE LA FLOTA COASTS REST OF THE AREA: SECTOR W 8 PROB OF MIST FOG PATCHES PROB OFISOL SNOW FALL WORSENING TOWARDS THE END OF THE PERIOD VIS MODERATE TO POOR OCNL VERY POOR

GERLACHE STRAIT : SECTOR N 6 INCR 8 GUST WITH 9 INTENSITY BY 25/1800 PROB OF MIST FOG PATCHES PROB OFISOL SNOW FALL SPELLS OF GOOD WEATHER DURING THE NIGTH VIS MODERATE TO POOR OCNL VERY POOR

MARGARITA BAY : SECTOR N 8 GUST WITH 9 INTENSITY PROB OF MIST PROB OFISOL SNOW FALL IMPR TOWARDS THE END OF THE PERIOD VIS GOOD TO MODERATE OCNL POOR

EREBUS Y TERROR GULF : NW 8 GUST WITH 9 INTENSITY PROB OF MIST FOG PATCHES PROB OFISOL SNOW FALL WORSENING TOWARDS THE END OF THE PERIOD VIS GOOD TO MODERATE OCNL VERY POOR

OCEANIC AREAS:

NORTHER BELLINGSHAUSEN SEA (60-66S 70-90W): NW 8 GUST WITH 9 INTENSITY VEER SECTOR N 5 BY 25/2300 PROB OF FOG MIST PROB OFISOL SNOW FALL VIS POOR OCNL VERY POOR

SOUTHERN BELLINGSHAUSEN SEA (66-73S 70-90W): SECTOR N 8 GUST WITH 9 INTENSITY DECR 4 BY 25/2300 PROB OF FOG MIST PROB OFISOL SNOW FALL VIS POOR OCNL VERY POOR

NORTHERN WEDDELL SEA (60-68S 20-50W): SECTOR W 8 DECR 5 BY 25/1800 PROB OF FOG MIST PROB OFISOL SNOW FALL VIS GOOD TO MODERATE OCNL VERY POOR

SOUTHERN WEDDELL SEA (68-78S 20-60W): SECTOR N 3/4 PROB OF MIST FOG PATCHES PROB OFISOL SNOW FALL VIS GOOD TO MODERATE OCNL VERY POOR=