1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
2026-09-20, 12:00 UTC.
NATIONAL WEATHER SERVICE
SEA ICE AND ICEBERGS ISSUED BY SHN
PRESSURE HPA
BEAUFORT SCALE WINDS.
PART 1 GALE WARNING:
WARNING 429: STRONG BARIC GRADIENT WILL PROVOKE WINDS FORCE 8 FROM SECTOR N WITH
GUST BETWEEN 35S-40S AND 35W-50W FROM 21/0000
WARNING 428: LOW 992HPA AT 44S 67W MOV E DEEPENING WILL PROVOKE WINDS FORCE 8
FROM SECTOR S WITH GUST IN RINCON BAHIA BLANCA COASTS PENINSULA DE VALDES COASTS
GOLFO DE SAN JORGE COASTS CENTRAL WEST AREA (40S- 50S AND 40W- 60W) FROM
20/2100
PART 2 GENERAL SYNOPSIS AT 09:00UTC
LOW 992HPA 44S 67W MOV E DPN EXTENDS CFNT44S 67W 37S 67W MOV NE
HIGH 1030HPA 33S 33W MOV E
CFNT AT 56S 46W 53S 56W MOV NE INTSF
191400 UTC 1.SEA ICE LIMIT 5529S 02000W 5408S 02617W 5336S 03217W 5536S 03757W
5710S 04316W 5821S 04813W 5954S 05248W 6232S 05655W 6252S 06033W 6358S 06336W
6017S 06558W 6051S 06716W 2.ICEBERGS GREATER THAN 10NM A81 5742S 04531W 28X25NM
D33B 5934S 04550W 21X12NM A76C 5430S 02629W 17X6NM 3.ICEBERGS SMALLER THAN 10NM
D32 5701S 03820W 9X6NM ICEBERG1 57181S 04733W 5X3NM ICEBERG2 5910S 05042W 5X3NM
ICEBERG3 5621S 05024W 4X3NM ICEBERG4 5807S 04958W 3X1NM 4.ICEBERGS AREA A5600S
02000W 5000S 02000W 5900S 04800W 5300S 04800W 5000S 04000W B5900S 06200W 6500S
06500W 5900S 04800W 5300S 04800W
PART 3 FORECAST ISSUED 12:00 UTC VALID UNTIL 12:00 UTC 2026-09-21
COASTAL AREAS:
INNER RIO DE LA PLATA: SECTOR N 4 VEER SECTOR S 6/7 WITH GUSTS BY 20/2100 PROB
OF HVY RAIN STORMS STARTING EVENING STARTING NIGTH IMPR MIST DURING THE MORNING
VIS MODERATE TO POOR
OUTER RIO DE LA PLATA: SECTOR N 5 WITH GUSTS VEER SECTOR S 6/7 WITH GUSTS PROB
OF HVY RAIN STORMS STARTING EVENING STARTING NIGTH IMPR MIST DURING THE MORNING
VIS MODERATE TO POOR
URUGUAY SOUTH EAST COASTS: SECTOR N 4 VEER SECTOR S 6/7 WITH GUSTS BY 20/2100
PROB OF RAIN STORMS STARTING EVENING STARTING NIGTH IMPR MIST DURING THE MORNING
VIS MODERATE TO POOR
MAR DEL PLATA COASTS(3617S - 3830S): SECTOR S 4/5 WITH GUSTS VEER SECTOR S 6/7
WITH GUSTS BY 20/1800 PROB OF HVY RAIN STORMS NXT PROB OF SH STARTING NIGTH VIS
MODERATE OCNL POOR
RINCON BAHIA BLANCA COASTS(3830S - 41S): SECTOR N 4/5 WITH GUSTS VEER SECTOR S
6/8 WITH GUSTS PROB OF HVY RAIN STORMS NXT PROB OF SH STARTING NIGTH VIS
MODERATE TO POOR
PENINSULA DE VALDES COASTS(41S - 45S): SECTOR N 5/6 WITH GUSTS VEER SECTOR S
6/8 WITH GUSTS BY 20/2100 PROB OF HVY SH RAIN SPELLS OF GOOD WEATHER VIS
MODERATE TO POOR
GOLFO DE SAN JORGE COASTS(45S - 48S): SECTOR S 6 WITH GUSTS INCR 8 BY 20/1800
PROB OF SH RAIN NXT PROB OFISOL RAIN AND SNOW MIXTURE STARTING NIGTH VIS POOR TO
MODERATE
SOUTH PATAGONIA COASTS(48S - 54S): SECTOR S 6/7 WITH GUSTS PROB OF SH RAIN AND
SNOW MIXTURE SPELLS OF GOOD WEATHER VIS MODERATE OCNL POOR
FIN DEL MUNDO COASTS(54S - 55S): SECTOR S 6/5 WITH GUSTS PROB OF ISOL SNOW
FALL VIS MODERATE
ISLAS MALVINAS COASTS: SECTOR S 5/6 WITH GUSTS PROB OF ISOL SNOW FALL VIS
MODERATE
OCEANIC AREAS:
NORTH AREA (35S- 40S AND 20W- 55W) E OF 35 - W OF 50W: SECTOR N 6/8 WITH GUSTS
PROB OF ISOL RAIN STORMS SPELLS OF GOOD WEATHER VIS MODERATE TO POOR
E OF 35W: SECTOR W 5 WITH GUSTS VEER SECTOR N 6 WITH GUSTS PROB OF SH RAIN
STARTING EARLY MORNING VIS MODERATE
REST OF THE AREA: SECTOR N 6/7 WITH GUSTS VEER SECTOR W PROB OF INTERMITTENT SH
RAIN VIS MODERATE OCNL POOR
CENTRAL EAST AREA (40S- 50S AND 20W- 40W): SECTOR W 6/7 WITH GUSTS VEER SECTOR N
PROB OF ISOL RAIN SPELLS OF GOOD WEATHER VIS MODERATE OCNL POOR
CENTRAL WEST AREA (40S- 50S AND 40W- 60W) W OF 50W: SECTOR N 6 WITH GUSTS VEER
SECTOR S 8 WITH GUSTS PROB OF SH RAIN VIS POOR
REST OF THE AREA: SECTOR N 6/7 WITH GUSTS PROB OF SH RAIN SPELLS OF GOOD
WEATHER VIS MODERATE OCNL POOR
SOUTH EAST AREA (50S- 60S AND 20W- 40W): SECTOR W 5 WITH GUSTS VEER SECTOR S 6
WITH GUSTS PROB OF ISOL RAIN AND SNOW MIXTURE SPELLS OF GOOD WEATHER VIS
MODERATE OCNL POOR
SOUTH WEST AREA (50S- 60S AND 40W- 60W): SECTOR S 5/6 WITH GUSTS PROB OF ISOL
SNOW FALL VIS MODERATE
DRAKE AREA (55S- 60S AND 60W- 67W): SECTOR S 6 WITH GUSTS VEER SECTOR W 5 WITH
GUSTS PROB OF INTERMITTENT SNOW FALL VIS MODERATE OCNL POOR
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1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
12:00 UTC 20, SEPTEMBER 2026.
NATIONAL WEATHER SERVICE (NWS)
SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS
PART 1
NO WARNINGS
PART 2 GENERAL SYNOPSIS AT 09:00UTC
RIDGE 988HPA 63S 54W MOV E WKN
HIGH 991HPA 64S 48W MOV E INTSF EXTENDS RIDGE AT 64S 48W 67S 43W 69S 32W MOV E
RIDGE 60S 80W 64S 75W 68S 70W MOV E
191400 UTC 1.SEA ICE LIMIT 5529S 02000W 5408S 02617W 5336S 03217W 5536S 03757W 5710S 04316W 5821S 04813W 5954S 05248W 6232S 05655W 6252S 06033W 6358S 06336W 6017S 06558W 6051S 06716W 2.ICEBERGS GREATER THAN 10NM A81 5742S 04531W 28X25NM D33B 5934S 04550W 21X12NM A76C 5430S 02629W 17X6NM 3.ICEBERGS SMALLER THAN 10NM D32 5701S 03820W 9X6NM ICEBERG1 57181S 04733W 5X3NM ICEBERG2 5910S 05042W 5X3NM ICEBERG3 5621S 05024W 4X3NM ICEBERG4 5807S 04958W 3X1NM 4.ICEBERGS AREA A5600S 02000W 5000S 02000W 5900S 04800W 5300S 04800W 5000S 04000W B5900S 06200W 6500S 06500W 5900S 04800W 5300S 04800W
PART 3 FORECAST ISSUED 12:00 UTC VALID UNTIL 12:00 UTC 2026-09-21
COASTAL AREAS:
SOUTHERN PORTION OF DRAKE STRAIT W OF 60W: SECTOR W 5 WITH GUSTS VEER NW 5/7 WITH GUSTS BY 20/1800 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER STARTING NOON VIS POOR TO MODERATE
SOUTHERN PORTION OF DRAKE STRAIT REST OF THE AREA: SW 5/6 WITH GUSTS VEER SECTOR W 5/5 WITH GUSTS BY 20/1800 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER STARTING NOON VIS VERY POOR TO MODERATE
MAR DE LA FLOTA COASTS W OF 60W: SECTOR W 5 WITH GUSTS VEER NW 6/7 WITH GUSTS BY 20/1800 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER STARTING NOON VIS POOR TO MODERATE
MAR DE LA FLOTA COASTS REST OF THE AREA: SW 5/6 WITH GUSTS VEER SECTOR W 6/5 WITH GUSTS BY 20/1800 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER STARTING NOON VIS VERY POOR TO MODERATE
GERLACHE STRAIT : SW 4/3 BACK NE 4/5 BY 21/0300 PROB OF MIST PROB OFISOL SNOW FALL SPELLS OF GOOD WEATHER STARTING NOON VIS POOR TO MODERATE
MARGARITA BAY : NE 4/3 BACK SECTOR N 4/6 BY 21/0300 PROB OF MIST PROB OFISOL SNOW FALL WORSENING DURING THE NIGTH VIS MODERATE TO POOR
EREBUS Y TERROR GULF : NW 3/4 BACK SW 4/5 BY 21/0000 PROB OF MIST VIS MODERATE OCNL POOR
OCEANIC AREAS:
NORTHER BELLINGSHAUSEN SEA N OF 64S: SECTOR W 4/5 WITH GUSTS VEER NW 6/7 BY 20/2100 PROB OF MIST PROB OFISOL SNOW FALL WORSENING STARTING NOON VIS GOOD TO MODERATE
NORTHER BELLINGSHAUSEN SEA REST OF THE AREA: NW 5/7 WITH GUSTS BACK SECTOR W 6/5 BY 21/0000 PROB OF MIST PROB OFINTERMITTENT SNOW FALL WORSENING STARTING EARLY MORNING VIS GOOD TO MODERATE OCNL VERY POOR
SOUTHERN BELLINGSHAUSEN SEA (66-73S 70-90W): SECTOR N 4/5 BACK SECTOR W 5/6 WITH GUSTS BY 20/2100 PROB OF FOG AND MIST IN PATCHES WORSENING TOWARDS NOON VIS MODERATE TO VERY POOR
NORTHERN WEDDELL SEA N OF 64S: SECTOR S 3/4 VEER SECTOR W 4/3 BY 20/2100 PROB OF FOG AND MIST IN PATCHES PROB OFISOL SNOW FALL IMPR TOWARDS NOON VIS VERY POOR TO MODERATE OCNL GOOD
NORTHERN WEDDELL SEA REST OF THE AREA: SECTOR S 4/5 VEER SECTOR W 4/3 BY 20/1800 PROB OF FOG AND MIST IN PATCHES SPELLS OF GOOD WEATHER STARTING NOON VIS VERY POOR TO MODERATE OCNL GOOD
SOUTHERN WEDDELL SEA (68-78S 20-60W): SECTOR E 3/4 VEER SE 5/4 BY 20/1800 PROB OF MIST VIS GOOD TO MODERATE=