1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
2026-09-18, 00:00 UTC.
NATIONAL WEATHER SERVICE
SEA ICE AND ICEBERGS ISSUED BY SHN
PRESSURE HPA
BEAUFORT SCALE WINDS.
PART 1
NO WARNINGS
PART 2 GENERAL SYNOPSIS AT 21:00UTC
171400 UTC 1.SEA ICE LIMIT 5527S 02000W 5408S 02618W 5439S 03218W 5557S 03757W
5658S 04316W 5914S 04813W 5921S 05247W 6157S 05654W 6223S 06033W 5937S 06337W
6115S 06559W 6053S 06716W 2.ICEBERGS GREATER THAN 10NM A81 5746S 04552W 28X25NM
D33B 5930S 04657W 21X12NM A76C 5429S 02632W 17X6NM 3.ICEBERGS SMALLER THAN 10NM
D32 5738S 03819W 9X6NM ICEBERG1 5718S 04733W 5X3NM ICEBERG2 5953S 05104W 5X3NM
ICEBERG3 5621S 05024W 4X3NM ICEBERG4 5807S 04958W 3X1NM 4.ICEBERGS AREA A5535S
02000W 5000S 02000W 5000S 04000W 5800S 04000W B5800S 04000W 5300S 04000W 5300S
05000W 5900S 05000W C5900S 05000W 5500S 05000W 5900S 06716W 6100S 06716W
LOW 993HPA 52S 41W MOV E WKN EXTENDS CFNT50S 40W 43S 47W 39S 57W
HIGH 1020HPA 42S 60W MOV E WKN
PART 3 FORECAST ISSUED 00:00 UTC VALID UNTIL 00:00 UTC 2026-09-19
COASTAL AREAS:
INNER RIO DE LA PLATA: SECTOR N 3 PROB OF MIST STARTING EARLY MORNING IMPR VIS
GOOD OCNL MODERATE
OUTER RIO DE LA PLATA: SECTOR N 3/4 PROB OF MIST STARTING EARLY MORNING IMPR VIS
GOOD OCNL MODERATE
URUGUAY SOUTH EAST COASTS: SECTOR N 4 PROB OF FOG MIST STARTING EARLY MORNING
IMPR VIS GOOD OCNL MODERATE
MAR DEL PLATA COASTS(3617S - 3830S): SECTOR N 3/4 PROB OF FOG MIST STARTING
EARLY MORNING IMPR VIS MODERATE TO GOOD
RINCON BAHIA BLANCA COASTS(3830S - 41S): SECTOR E 4 BACK SECTOR N 4/5 VIS
GOOD
PENINSULA DE VALDES COASTS(41S - 45S): SECTOR N 5/6 WITH GUSTS VIS GOOD TO
MODERATE
GOLFO DE SAN JORGE COASTS(45S - 48S): SECTOR N 5/7 GUST WITH 8 INTENSITY VIS
GOOD TO POOR
SOUTH PATAGONIA COASTS(48S - 54S): SECTOR N 5/7 GUST WITH 8 INTENSITY PROB OF
SH STARTING EARLY MORNING VIS GOOD TO POOR
FIN DEL MUNDO COASTS(54S - 55S): SECTOR N 4/6 WITH GUSTS PROB OF SH OF RAIN SH
OF SNOW VIS MODERATE OCNL POOR
ISLAS MALVINAS COASTS: SECTOR W 4/5 VEER SECTOR N 5/7 GUST WITH 8 INTENSITY BY
18/0900 PROB OF SH STARTING EARLY MORNING VIS GOOD TO POOR
OCEANIC AREAS:
NORTH AREA (35S- 40S AND 20W- 55W) E OF 40W: SECTOR W 5/6 WITH GUSTS PROB OF
RAIN VIS MODERATE TO POOR
REST OF THE AREA: SECTOR W 6/5 WITH GUSTS VEER SECTOR N 5 BY 18/1800 PROB OF
ISOL RAIN STARTING EVENING IMPR VIS MODERATE OCNL POOR
CENTRAL EAST AREA (40S- 50S AND 20W- 40W) E OF 30W: NW 6/5 WITH GUSTS PROB OF
RAIN VIS POOR
REST OF THE AREA: NW 7/6 WITH GUSTS BACK SW 6 WITH GUSTS BY 18/1500 PROB OF
RAIN VIS POOR
CENTRAL WEST AREA (40S- 50S AND 40W- 60W) E OF 50W: SECTOR W 7/6 WITH GUSTS BACK
SW 6/5 WITH GUSTS BY 18/0900 PROB OF RAIN STARTING EVENING IMPR VIS POOR TO
GOOD
REST OF THE AREA: SW 6/5 WITH GUSTS VEER SECTOR N 6/7 GUST WITH 8 INTENSITY BY
18/1200 VIS MODERATE
SOUTH EAST AREA (50S- 60S AND 20W- 40W) N OF 55S: NW 6/7 GUST WITH 8 INTENSITY
BACK SECTOR W 6 WITH GUSTS BY 18/1200 PROB OF SH OF RAIN SH OF SNOW IMPR
STARTING EVENING VIS POOR TO MODERATE
REST OF THE AREA: SECTOR W 6/7 WITH GUSTS PROB OF SH OF SNOW VIS POOR
SOUTH WEST AREA (50S- 60S AND 40W- 60W) E OF 50W: SECTOR W 6/7 WITH GUSTS PROB
OF SH OF RAIN SH OF SNOW VIS POOR
REST OF THE AREA: SECTOR W 6/7 WITH GUSTS VEER SECTOR N 7 GUST WITH 8 INTENSITY
PROB OF SH OF RAIN SH OF SNOW VIS VERY POOR TO POOR
DRAKE AREA (55S- 60S AND 60W- 67W): SECTOR W 6/5 WITH GUSTS PROB OF SH OF RAIN
SH OF SNOW VIS POOR
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1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
00:00 UTC 18, SEPTEMBER 2026.
NATIONAL WEATHER SERVICE (NWS)
SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS
PART 1 GALE WARNING:
1161/2026 STRONG BARIC GRADIENT SOUTHERN PORTION OF DRAKE STRAIT MAR DE LA FLOTA COASTS MOV NE DEEPENING PROVOKES WINDS FORCE 8 FROM SECTOR W WITH GUST IN 60S-64S 62W-50W UNTIL 18/2100
1162/2026 STRONG BARIC GRADIENT NORTHERN WEDDELL SEA MOV E DEEPENING WILL PROVOKE WINDS FORCE 8 FROM SECTOR W WITH GUST IN 60S-65S 50W-30W FROM 18/0300 UNTIL 19/0300
PART 2 GENERAL SYNOPSIS AT 21:00UTC
LOW 976HPA 67S 58W MOV E DPN
LOW 973HPA 71S 55W MOV E WKN
LOW 972HPA 69S 71W MOV E DPN
171400 UTC 1.SEA ICE LIMIT 5527S 02000W 5408S 02618W 5439S 03218W 5557S 03757W 5658S 04316W 5914S 04813W 5921S 05247W 6157S 05654W 6223S 06033W 5937S 06337W 6115S 06559W 6053S 06716W 2.ICEBERGS GREATER THAN 10NM A81 5746S 04552W 28X25NM D33B 5930S 04657W 21X12NM A76C 5429S 02632W 17X6NM 3.ICEBERGS SMALLER THAN 10NM D32 5738S 03819W 9X6NM ICEBERG1 5718S 04733W 5X3NM ICEBERG2 5953S 05104W 5X3NM ICEBERG3 5621S 05024W 4X3NM ICEBERG4 5807S 04958W 3X1NM 4.ICEBERGS AREA A5535S 02000W 5000S 02000W 5000S 04000W 5800S 04000W B5800S 04000W 5300S 04000W 5300S 05000W 5900S 05000W C5900S 05000W 5500S 05000W 5900S 06716W 6100S 06716W
PART 3 FORECAST ISSUED 00:00 UTC VALID UNTIL 00:00 UTC 2026-09-19
COASTAL AREAS:
SOUTHERN PORTION OF DRAKE STRAIT W OF 60W: SECTOR W 5/6 WITH GUSTS VEER NW 7 WITH GUSTS BY 18/0900 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER VIS POOR TO MODERATE
SOUTHERN PORTION OF DRAKE STRAIT REST OF THE AREA: SECTOR W 8 WITH GUSTS VEER NW 8/7 WITH GUSTS BY 18/1800 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER TOWARDS THE END OF THE PERIOD VIS VERY POOR TO MODERATE
MAR DE LA FLOTA COASTS W OF 60W: SECTOR W 5/6 WITH GUSTS VEER NW 7 WITH GUSTS BY 18/0900 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER TOWARDS THE END OF THE PERIOD VIS POOR TO MODERATE
MAR DE LA FLOTA COASTS REST OF THE AREA: SECTOR W 8 WITH GUSTS VEER NW 8/7 WITH GUSTS BY 18/1800 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER TOWARDS THE END OF THE PERIOD VIS VERY POOR TO MODERATE
GERLACHE STRAIT : SECTOR W 4/5 BACK SW 4/3 BY 18/1500 PROB OF MIST PROB OFINTERMITTENT SNOW FALL IMPR STARTING NOON VIS POOR TO MODERATE
MARGARITA BAY : NW 4/5 WITH GUSTS VEER SECTOR N 4/3 BY 18/1200 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER DURING THE EVENING VIS VERY POOR TO MODERATE
EREBUS Y TERROR GULF : NW 4/5 BACK SW 5/6 WITH GUSTS BY 18/1200 PROB OF MIST VIS GOOD TO MODERATE
OCEANIC AREAS:
NORTHER BELLINGSHAUSEN SEA N OF 64S: SECTOR W 4/5 BACK SW 5/6 WITH GUSTS BY 18/1800 PROB OF MIST PROB OFISOL SNOW FALL IMPR DURING THE EVENING VIS MODERATE TO GOOD
NORTHER BELLINGSHAUSEN SEA REST OF THE AREA: SECTOR W 7/6 WITH GUSTS DECR SECTOR W 5 WITH GUSTS BY 18/1500 PROB OF MIST PROB OFINTERMITTENT SNOW FALL IMPR DURING THE EVENING VIS VERY POOR TO MODERATE
SOUTHERN BELLINGSHAUSEN SEA (66-73S 70-90W): SW 5/6 WITH GUSTS BACK SECTOR S 4/3 BY 18/1500 PROB OF FOG AND MIST IN PATCHES PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER TOWARDS THE END OF THE PERIOD VIS VERY POOR TO MODERATE
NORTHERN WEDDELL SEA N OF 64S: SECTOR W 4/5 INCR SECTOR W 7/8 WITH GUSTS BY 18/0600 PROB OF FOG AND MIST IN PATCHES PROB OFISOL SNOW FALL SPELLS OF GOOD WEATHER TOWARDS THE END OF THE PERIOD VIS VERY POOR TO MODERATE OCNL GOOD
NORTHERN WEDDELL SEA REST OF THE AREA: SW 3/4 BACK SE 5/4 WITH GUSTS BY 18/1500 PROB OF FOG AND MIST IN PATCHES PROB OFISOL SNOW FALL SPELLS OF GOOD WEATHER DURING THE EVENING VIS VERY POOR TO MODERATE OCNL GOOD
SOUTHERN WEDDELL SEA (68-78S 20-60W): SE 3/4 BACK SECTOR E 5/4 BY 18/1200 PROB OF MIST VIS GOOD TO MODERATE=