1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
2026-09-25, 12:00 UTC.
NATIONAL WEATHER SERVICE
SEA ICE AND ICEBERGS ISSUED BY SHN
PRESSURE HPA
BEAUFORT SCALE WINDS.
PART 1 GALE WARNING:
WARNING 438: STRONG BARIC GRADIENT WILL PROVOKE WINDS FORCE 8 WITH GUST IN
CENTRAL EAST AREA (40S- 50S AND 20W- 40W) FROM 26/0000
WARNING 436: STRONG BARIC GRADIENT PROVOKES WINDS FORCE 8 WITH GUST IN CENTRAL
EAST AREA (40S- 50S AND 20W- 40W)
PART 2 GENERAL SYNOPSIS AT 09:00UTC
STRONG BARIC GRADIENT CENTRAL EAST AREA (40S- 50S AND 20W- 40W) MOV E WKN
LOW 996HPA 43S 58W MOV NE EXP 42S 45W BY 26/1200
LOW 996HPA 49S 42W MOV SE DPN EXP 50S 25W BY 26/1200 EXTENDS CFNT AT 47S 35W 43S
41W 39S 53W MOV NE
STATIONARY FRONT 39S 53W 36S 58W 34S 62W
CFNT AT 60S 39W 57S 50W 55S 64W MOV E
241400 UTC 1.SEA ICE LIMIT 5534S 02000W 5352S 02618W 5434S 03217W 5642S 03758W
5716S 04316W 5835S 04813W 6034S 05247W 5853S 05655W 5837S 06033W 5902S 06337W
5941S 06559W 6030S 06716W 2.ICEBERGS GREATER THAN 10NM A81 5659S 04428W 28X25NM
D33B 5919S 04527W 21X12NM A76C 5426S 02628W 17X6NM A85 6036S 05239W 10X3NM
ICEBERG1 6048S 05238W 10X3NM 3.ICEBERGS SMALLER THAN 10NM D32 5736S 03900W 9X6NM
D33C 6155S 05433W 9X5NM ICEBERG2 5633S 04508W 5X3NM ICEBERG3 5831S 04922W 5X3NM
ICEBERG4 5723S 04826W 4X3NM ICEBERG5 5747S 04748W 3X1NM ICEBERG6 6054S 05305W
3X2NM 4.ICEBERGS AREA A5610S 02000W 5000S 02000W 5000S 03500W 5610S 03500W
B5610S 03500W 5000S 03500W 5400S 05000W 5930S 05000W C5930S 05000W 5400S 05000W
5900S 06716W 6045S 06716W
PART 3 FORECAST ISSUED 12:00 UTC VALID UNTIL 12:00 UTC 2026-09-26
COASTAL AREAS:
INNER RIO DE LA PLATA: SECTOR N 4/3 BACK SECTOR S 3/4 VIS GOOD
OUTER RIO DE LA PLATA: SECTOR N 4/3 BACK SE 3/4 VIS GOOD
URUGUAY SOUTH EAST COASTS: SECTOR N 4/3 BACK SECTOR S /3 PROB OF ISOL SH IMPR
VIS GOOD OCNL MODERATE
MAR DEL PLATA COASTS(3617S - 3830S): SECTOR W 5/4 BACK SE /4 VIS GOOD
RINCON BAHIA BLANCA COASTS(3830S - 41S): SW 5/4 BACK SECTOR E /3 PROB OF MIST
STARTING EARLY MORNING VIS GOOD TO MODERATE
PENINSULA DE VALDES COASTS(41S - 45S): SW 7/5 WITH GUSTS BACK NE 3/4 PROB OF
SH IMPR PROB OF MIST STARTING EARLY MORNING VIS MODERATE OCNL GOOD
GOLFO DE SAN JORGE COASTS(45S - 48S): SECTOR W 5 WITH GUSTS DECR /3 PROB OF SH
IMPR PROB OF MIST STARTING EARLY MORNING VIS MODERATE OCNL GOOD
SOUTH PATAGONIA COASTS(48S - 54S): SW 5 WITH GUSTS VEER VRB 4/3 PROB OF RAIN
AND SNOW MIXTURE SPELLS OF GOOD WEATHER VIS MODERATE OCNL GOOD
FIN DEL MUNDO COASTS(54S - 55S): SW 5 WITH GUSTS VEER SECTOR W /4 PROB OF SNOW
FALL VIS POOR
ISLAS MALVINAS COASTS: SECTOR W 5 WITH GUSTS BACK SW WITH GUSTS PROB OF SNOW
FALL SPELLS OF GOOD WEATHER VIS MODERATE OCNL GOOD
OCEANIC AREAS:
NORTH AREA (35S- 40S AND 20W- 55W) E OF 30W: NW 5/6 WITH GUSTS PROB OF HVY RAIN
STORMS VIS POOR
E OF 50 - W OF 30W: NW 7/6 WITH GUSTS BACK SECTOR W /7 WITH GUSTS PROB OF HVY
SH RAIN STORMS VIS POOR
REST OF THE AREA: SECTOR N 5 WITH GUSTS BACK SECTOR S 7/4 PROB OF SH IMPR VIS
POOR TO GOOD
CENTRAL EAST AREA (40S- 50S AND 20W- 40W) E OF 30W: NW 8 WITH GUSTS PROB OF SH
RAIN VIS POOR
REST OF THE AREA: NW 8 WITH GUSTS BACK SW /7 WITH GUSTS PROB OF RAIN AND SNOW
MIXTURE VIS POOR
CENTRAL WEST AREA (40S- 50S AND 40W- 60W) N OF 45S: SECTOR N 6/5 WITH GUSTS BACK
SECTOR W 6/7 WITH GUSTS PROB OF SH RAIN VIS POOR OCNL MODERATE
REST OF THE AREA: SECTOR S 4 VEER SW 6/7 WITH GUSTS PROB OF SH RAIN AND SNOW
MIXTURE VIS POOR
SOUTH EAST AREA (50S- 60S AND 20W- 40W): NW 7 WITH GUSTS BACK SW /7 WITH GUSTS
PROB OF SNOW FALL VIS POOR
SOUTH WEST AREA (50S- 60S AND 40W- 60W): W 7 WITH GUSTS BACK SW /7 WITH GUSTS
PROB OF SNOW FALL VIS POOR
DRAKE AREA (55S- 60S AND 60W- 67W): SECTOR W 7 PROB OF SNOW FALL VIS POOR
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1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
12:00 UTC 25, SEPTEMBER 2026.
NATIONAL WEATHER SERVICE (NWS)
SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS
PART 1 STORM WARNING:
1181/2026 STRONG BARIC GRADIENT NORTHER BELLINGSHAUSEN SEA SOUTHERN BELLINGSHAUSEN SEA MOV E WEAKENING WILL PROVOKE WINDS FORCE 10 FROM NE WITH GUST IN 62S-70S 90W-70W FROM 25/2100 UNTIL 26/1800
GALE WARNING:
1180/2026 STRONG BARIC GRADIENT MAR DE LA FLOTA COASTS MOV E WEAKENING PROVOKES WINDS FORCE 8 FROM SW WITH GUST IN 62S-64S 50W-40W UNTIL 25/1500
PART 2 GENERAL SYNOPSIS AT 09:00UTC
LOW 958HPA 61S 40W MOV E WKN
STRONG BARIC GRADIENT 61S 84W 36S 78W 65S 72W MOV NE DPN
241400 UTC 1.SEA ICE LIMIT 5534S 02000W 5352S 02618W 5434S 03217W 5642S 03758W 5716S 04316W 5835S 04813W 6034S 05247W 5853S 05655W 5837S 06033W 5902S 06337W 5941S 06559W 6030S 06716W 2.ICEBERGS GREATER THAN 10NM A81 5659S 04428W 28X25NM D33B 5919S 04527W 21X12NM A76C 5426S 02628W 17X6NM A85 6036S 05239W 10X3NM ICEBERG1 6048S 05238W 10X3NM 3.ICEBERGS SMALLER THAN 10NM D32 5736S 03900W 9X6NM D33C 6155S 05433W 9X5NM ICEBERG2 5633S 04508W 5X3NM ICEBERG3 5831S 04922W 5X3NM ICEBERG4 5723S 04826W 4X3NM ICEBERG5 5747S 04748W 3X1NM ICEBERG6 6054S 05305W 3X2NM 4.ICEBERGS AREA A5610S 02000W 5000S 02000W 5000S 03500W 5610S 03500W B5610S 03500W 5000S 03500W 5400S 05000W 5930S 05000W C5930S 05000W 5400S 05000W 5900S 06716W 6045S 06716W
PART 3 FORECAST ISSUED 12:00 UTC VALID UNTIL 12:00 UTC 2026-09-26
COASTAL AREAS:
SOUTHERN PORTION OF DRAKE STRAIT W OF 60W: SW 6/5 DECR SECTOR E 4/5 BY 26/0600 PROB OF MIST PROB OFISOL SNOW FALL SPELLS OF GOOD WEATHER STARTING EVENING VIS MODERATE TO POOR OCNL VERY POOR
SOUTHERN PORTION OF DRAKE STRAIT REST OF THE AREA: SECTOR S 3/4 BACK SE 4 BY 26/0000 AFTERWARDS SECTOR E 3 BY 26/0900 PROB OF MIST PROB OFISOL SNOW FALL IMPR TOWARDS THE END OF THE PERIOD VIS MODERATE TO POOR
MAR DE LA FLOTA COASTS W OF 60W: SW 6/7 WITH GUSTS DECR SW 6/5 BY 26/0000 AFTERWARDS SECTOR E 4 BY 26/0900 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER DURING THE EVENING VIS MODERATE TO POOR OCNL VERY POOR
MAR DE LA FLOTA COASTS REST OF THE AREA: SW 8/7 WITH GUSTS DECR SW 6/5 BY 25/1800 AFTERWARDS SECTOR W 4 BY 26/0900 PROB OF MIST PROB OFISOL SNOW FALL WORSENING TOWARDS THE END OF THE PERIOD VIS MODERATE TO GOOD OCNL POOR
GERLACHE STRAIT : SW 5/6 VEER SECTOR W 5/4 BY 26/0000 AFTERWARDS SECTOR E 6 BY 26/0900 PROB OF MIST PROB OFMOD SNOW FALL WORSENING TOWARDS THE END OF THE PERIOD VIS MODERATE TO POOR OCNL VERY POOR
MARGARITA BAY : SW 4 VEER SECTOR W 4 BY 26/0000 AFTERWARDS NW 6 BY 26/0900 PROB OF MIST PROB OFMOD SNOW FALL WORSENING TOWARDS THE END OF THE PERIOD VIS MODERATE TO POOR OCNL VERY POOR
EREBUS Y TERROR GULF : SECTOR S 4/5 VEER SW 4/3 BY 26/0000 AFTERWARDS NW 4 BY 26/0900 PROB OF FOG AND MIST IN PATCHES IMPR STARTING EVENING VIS MODERATE TO POOR OCNL GOOD
OCEANIC AREAS:
NORTHER BELLINGSHAUSEN SEA N OF 63S: SW 5/6 VEER SECTOR W 5 BY 25/2100 AFTERWARDS NW 6 BY 26/0900 PROB OF MIST PROB OFISOL SNOW FALL WORSENING STARTING EARLY MORNING VIS MODERATE TO POOR
NORTHER BELLINGSHAUSEN SEA REST OF THE AREA: SW 5/6 WITH GUSTS INCR NW 8 BY 26/0300 AFTERWARDS SECTOR W 5 BY 26/1200 PROB OF MIST PROB OFISOL SNOW FALL WORSENING TOWARDS THE END OF THE PERIOD VIS MODERATE TO POOR
SOUTHERN BELLINGSHAUSEN SEA (66-73S 70-90W): SECTOR W 4 INCR NW 7/8 WITH GUSTS BY 26/0000 AFTERWARDS SECTOR W 7 WITH GUSTS BY 26/1200 PROB OF MIST PROB OFMOD SNOW FALL WORSENING STARTING NOON VIS VERY POOR TO MODERATE OCNL MODERATE
NORTHERN WEDDELL SEA W OF 35W: SECTOR S 3/4 INCR SECTOR S 4/5 BY 25/2100 PROB OF MIST PROB OFISOL SNOW FALL IMPR STARTING EARLY MORNING VIS MODERATE TO GOOD
NORTHERN WEDDELL SEA REST OF THE AREA: SECTOR W 5/6 DECR SW 5 BY 26/0000 PROB OF MIST PROB OFISOL SNOW FALL WORSENING TOWARDS THE END OF THE PERIOD VIS MODERATE TO GOOD
SOUTHERN WEDDELL SEA (68-78S 20-60W): SECTOR S 5 DECR SW 4 BY 26/0000 PROB OF MIST PROB OFISOL SNOW FALL IMPR TOWARDS NOON VIS MODERATE TO GOOD=