1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
00:00 UTC 19, SEPTEMBER 2026.
NATIONAL WEATHER SERVICE
SEA ICE AND ICEBERGS ISSUED BY SHN
PRESSURE HPA
BEAUFORT SCALE WINDS.
PART 1 GALE WARNING:
WARNING 426: STRONG BARIC GRADIENT MOV E PROVOKES WINDS FORCE 8 FROM SECTOR N
WITH GUST BETWEEN 50S-55S AND 40W-55W
WARNING 427: STRONG BARIC GRADIENT MOV E WILL PROVOKE WINDS FORCE 8 FROM SECTOR
N WITH GUST BETWEEN 50S-60S 30W-40W FROM 19/1200
PART 2 GENERAL SYNOPSIS AT 21:00UTC
LOW 1014HPA 44S 27W MOV SE NC EXTENDS SECONDARY CFNT AT 40S 28W 38S 29W 35S
33W
CFNT AT SOUTH PATAGONIA COASTS MOV E
RIDGE 40S 44W 43S 43W 46S 42W MOV E
181400 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 5746S 04543W 28X25NM
D33B 5933S 04621W 21X12NM A76C 5431S 02631W 17X6NM 3.ICEBERGS SMALLER THAN 10NM
D32 5701S 03820W 9X6NM ICEBERG1 57181S 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 2026-09-20
COASTAL AREAS:
INNER RIO DE LA PLATA: N 3/4 VEER E BY 19/1500 VIS VERY POOR TO POOR
OUTER RIO DE LA PLATA: NE 4/4 WITH GUSTS VIS GOOD
URUGUAY SOUTH EAST COASTS: NE 4/3 WITH GUSTS VIS GOOD
MAR DEL PLATA COASTS(3617S - 3830S): SECTOR N 4/5 WITH GUSTS VIS GOOD
RINCON BAHIA BLANCA COASTS(3830S - 41S): SECTOR N 4/5 VIS GOOD
PENINSULA DE VALDES COASTS(41S - 45S): SECTOR N 4 PROB OF SH TOWARDS THE END
OF THE PERIOD VIS GOOD TO POOR
GOLFO DE SAN JORGE COASTS(45S - 48S): SECTOR N 5/4 WITH GUSTS VEER N 2/4 BY
19/1800 PROB OF ISOL RAIN STARTING EVENING VIS GOOD TO MODERATE
SOUTH PATAGONIA COASTS(48S - 54S): SECTOR W 4 VEER VRB 3 BY 19/1500 LOW PROB
OF ISOL RAIN IMPR STARTING EARLY MORNING VIS MODERATE TO GOOD
FIN DEL MUNDO COASTS(54S - 55S): SW 5 WITH GUSTS PROB OF SH RAIN AND SNOW
MIXTURE VIS MODERATE
ISLAS MALVINAS COASTS: NW 6/5 WITH GUSTS BACK SECTOR W 4/3 BY 19/1500 PROB OF
ISOL RAIN SPELLS OF GOOD WEATHER VIS MODERATE
OCEANIC AREAS:
NORTH AREA (35S- 40S AND 20W- 55W) E OF 30W: NW 6/5 WITH GUSTS BACK SW 5 WITH
GUSTS BY 19/1200 PROB OF RAIN VIS POOR
NORTH AREA (35S- 40S AND 20W- 55W) W OF 30 - E OF 40W: SW 6/5 WITH GUSTS VEER W
4 BY 19/2100 PROB OF SH RAIN IMPR STARTING EVENING VIS POOR TO MODERATE
NORTH AREA (35S- 40S AND 20W- 55W) W OF 40 - E OF 50W: VRB 3 VEER SECTOR N 4 BY
19/1800 VIS GOOD
NORTH AREA (35S- 40S AND 20W- 55W) REST OF THE AREA: SECTOR N 4/5 WITH GUSTS VIS
GOOD
CENTRAL EAST AREA (40S- 50S AND 20W- 40W) E OF 30 - N OF 45S: NW 5 WITH GUSTS
BACK SW 4 BY 19/ PROB OF SH RAIN VIS GOOD OCNL POOR
CENTRAL EAST AREA (40S- 50S AND 20W- 40W) E OF 30 - S OF 45S: SECTOR W 3/4 PROB
OF ISOL DRIZZLE VIS MODERATE
CENTRAL EAST AREA (40S- 50S AND 20W- 40W) W OF 30 - N OF 45S: SW 5 WITH GUSTS
VEER NW 5/6 WITH GUSTS BY 19/2100 PROB OF ISOL RAIN VIS MODERATE
CENTRAL EAST AREA (40S- 50S AND 20W- 40W) REST OF THE AREA: SECTOR W 4 VEER NW 6
WITH GUSTS BY 19/1200 PROB OF SH VIS MODERATE OCNL POOR
CENTRAL WEST AREA (40S- 50S AND 40W- 60W) E OF 50W: VRB 5/6 GUST WITH 8
INTENSITY NW PROB OF RAIN NEXT IMPR TOWARDS THE END OF THE PERIOD VIS MODERATE
OCNL POOR
CENTRAL WEST AREA (40S- 50S AND 40W- 60W) REST OF THE AREA: NW 6/5 WITH GUSTS
PROB OF ISOL RAIN IMPR STARTING EARLY MORNING VIS MODERATE
SOUTH EAST AREA (50S- 60S AND 20W- 40W) E OF 30W: NW 6/7 GUST WITH 8 INTENSITY
PROB OF SH OF SNOW VIS MODERATE TO POOR
SOUTH EAST AREA (50S- 60S AND 20W- 40W) REST OF THE AREA: NW 7/8 WITH GUSTS PROB
OF SNOW FALL VIS VERY POOR TO POOR
SOUTH WEST AREA (50S- 60S AND 40W- 60W) E OF 50 - N OF 55S: SECTOR N 7/8 WITH
GUSTS BACK SECTOR W 6 WITH GUSTS BY 19/1800 PROB OF RAIN SPELLS OF GOOD WEATHER
VIS VERY POOR TO POOR
SOUTH WEST AREA (50S- 60S AND 40W- 60W) W OF 50 - N OF 55S: SECTOR N 8 WITH
GUSTS BACK SECTOR W 5/4 BY 19/1200 PROB OF ISOL RAIN STARTING EARLY MORNING IMPR
GRADUALLY VIS POOR TO MODERATE
SOUTH WEST AREA (50S- 60S AND 40W- 60W) REST OF THE AREA: NW 7 GUST WITH 8
INTENSITY BACK 6 WITH GUSTS BY 19/1200 PROB OF RAIN SNOW FALL VIS POOR TO
MODERATE
DRAKE AREA (55S- 60S AND 60W- 67W): SW 5/6 WITH GUSTS PROB OF SH OF SNOW VIS
MODERATE OCNL POOR
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NNNN=
1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
12:00 UTC 18, SEPTEMBER 2026.
NATIONAL WEATHER SERVICE (NWS)
SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS
PART 1 GALE WARNING:
1163/2026 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-6
4S 62W-50W UNTIL 18/2100
1164/2026 STRONG BARIC GRADIENT NORTHERN WEDDELL SEA MOV E DEEPENING PROVOKES WI
NDS FORCE 8 FROM SECTOR W WITH GUST IN 60S-65S 50W-30W UNTIL 19/0300
PART 2 GENERAL SYNOPSIS AT 09:00UTC
LOW 971HPA 67S 50W MOV E DPN
LOW 965HPA 64S 61W MOV E DPN
LOW 970HPA 70S 70W MOV E DPN
171400 UTC 1.SEA ICE LIMIT 5527S 02000W 5408S 02618W 5439S 03218W 5557S 03757W 5
658S 04316W 5914S 04813W 5921S 05247W 6157S 05654W 6223S 06033W 5937S 06337W 611
5S 06559W 6053S 06716W 2.ICEBERGS GREATER THAN 10NM A81 5746S 04552W 28X25NM D33
B 5930S 04657W 21X12NM A76C 5429S 02632W 17X6NM 3.ICEBERGS SMALLER THAN 10NM D32
5738S 03819W 9X6NM ICEBERG1 5718S 04733W 5X3NM ICEBERG2 5953S 05104W 5X3NM ICEB
ERG3 5621S 05024W 4X3NM ICEBERG4 5807S 04958W 3X1NM 4.ICEBERGS AREA A5535S 02000
W 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 12:00 UTC VALID UNTIL 12:00 UTC 2026-09-19
COASTAL AREAS:
SOUTHERN PORTION OF DRAKE STRAIT W OF 60W: NW 5/6 WITH GUSTS BACK SECTOR W 5 WIT
H GUSTS BY 19/0000 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEA
THER TOWARDS THE END OF THE PERIOD 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: NW 5/6 WITH GUSTS BACK SECTOR W 5 WITH GUSTS BY
19/0000 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER TOWAR
DS 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 WEATH
ER TOWARDS THE END OF THE PERIOD VIS VERY POOR TO MODERATE
GERLACHE STRAIT : SECTOR W 4/5 BACK SW 4/3 BY 18/1800 PROB OF MIST PROB OFINTERM
ITTENT SNOW FALL IMPR STARTING NOON VIS POOR TO MODERATE
MARGARITA BAY : NW 4/5 WITH GUSTS VEER SECTOR N 4/3 BY 18/1800 PROB OF MIST PROB
OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER DURING THE EVENING VIS VERY POO
R TO MODERATE
EREBUS Y TERROR GULF : NW 4/5 BACK SW 5/6 WITH GUSTS BY 18/1800 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 18/1
800 PROB OF MIST PROB OFISOL SNOW FALL IMPR DURING THE EVENING VIS MODERATE TO G
OOD
NORTHER BELLINGSHAUSEN SEA REST OF THE AREA: SECTOR W 7/6 WITH GUSTS DECR SECTOR
W 5 WITH GUSTS BY 18/1800 PROB OF MIST PROB OFINTERMITTENT SNOW FALL IMPR DURIN
G 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 18/1800 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 8 WITH GUSTS VEER NW 5/6 WITH GUSTS BY 1
9/0300 PROB OF FOG AND MIST IN PATCHES PROB OFISOL SNOW FALL SPELLS OF GOOD WEAT
HER 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 18/1800
PROB OF FOG AND MIST IN PATCHES PROB OFISOL SNOW FALL SPELLS OF GOOD WEATHER DUR
ING 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 18/1800 PROB O
F MIST VIS GOOD TO MODERATE=