1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
2026-04-27, 12:00 UTC.
NATIONAL WEATHER SERVICE
SEA ICE AND ICEBERGS ISSUED BY SHN
PRESSURE HPA
BEAUFORT SCALE WINDS.
PART 1 GALE WARNING:
WARNING 178: LOW 978HPA AT 40S 50W MOV SE DEEPENING EXPECTED 43S 39W BY 28/1200
PROVOKES WINDS FORCE 9 AROUND ITSELF WITH GUST BETWEEN 35S-50S AND 30W-55W
WARNING 177: STRONG BARIC GRADIENT ON PROVOKES WINDS FORCE 9 FROM SECTOR N WITH
GUST BETWEEN 35S-45S AND 20W-30W UNTIL 27/1800
WARNING 176: LOW 978HPA AT 40S 50W MOV SE DEEPENING EXPECTED 43S 39W BY 28/1200
PROVOKES WINDS FORCE 8 FROM SECTOR W WITH GUST IN OUTER RIO DE LA PLATA URUGUAY
SOUTH EAST COASTS UNTIL 27/1800
WARNING 175: LOW 978HPA AT 40S 50W MOV SE DEEPENING EXPECTED 43S 39W BY 28/1200
PROVOKES WINDS FORCE 9 FROM SECTOR S WITH GUST IN MAR DEL PLATA COASTS UNTIL
27/1500
PART 2 GENERAL SYNOPSIS AT 09:00UTC
261400 UTC 1.SEA ICE LIMIT 6809S 02000W 6756S 02635W 6110S 02938W 6602S 02952W
6152S 03912W 6342S 04236W 6324S 04624W 6304S 05045W 6305S 05510W 6320S 05819W
6338S 06047W 6607S 06716W 2.ICEBERGS GREATER THAN 10NM A76C 5835S 03613W 16X7NM
3.ICEBERGS SMALLER THAN 10NM ICEBERG1 4721S 02911W 6X3NM ICEBERG2 4755S 02819W
5X3NM ICEBERG3 4731S 02845W 4X2NM ICEBERG4 4718S 02834W 3X1NM ICEBERG5 5752S
03615W 3X1NM ICEBERG6 4314S 03427W 2X1NM ICEBERG7 5843S 03555W 3X1NM 4.ICEBERGS
AREA A4100S 02000W 6900S 02000W 4200S 04000W 6400S 04500W B6400S 04500W 6000S
04300W 6200S 06716W 6800S 06716W
LOW 978HPA 40S 50W MOV SE DPN EXP 43S 39W BY 28/1200 EXTENDS CFNT AT 40S 50W 37S
42W MOV SE ASOCIATED WITH OFNT AT 30S 50W 42S 55W 36S 54W
LOW 981HPA 58S 68W MOV E EXTENDS CFNT AT 58S 68W 56S 65W 50S 67W MOV E
HIGH 1011HPA 48S 35W MOV E EXP 50S 20W BY 28/0600
LOW 1002HPA 46S 22W MOV E
PART 3 FORECAST ISSUED 12:00 UTC VALID UNTIL 12:00 UTC 2026-04-28
COASTAL AREAS:
INNER RIO DE LA PLATA: SW 4 VEER NW 3/4 BY 28/0600 VIS GOOD
OUTER RIO DE LA PLATA: SW 8/7 WITH GUSTS DECR 5 WITH GUSTS BY 27/1500 VEER NW 4
BY 28/0600 VIS GOOD
URUGUAY SOUTH EAST COASTS: SW 8 WITH GUSTS DECR 6/5 WITH GUSTS BY 27/1800 VEER W
5 WITH GUSTS BY 28/0900 LOW PROB OF ISOL SH VIS GOOD OCNL POOR
MAR DEL PLATA COASTS(3617S - 3830S): SECTOR S 8/6 WITH GUSTS VEER SW 5 WITH
GUSTS BY 27/1500 LOW PROB OF ISOL SH VIS GOOD OCNL POOR
RINCON BAHIA BLANCA COASTS(3830S - 41S): SW 5 WITH GUSTS VEER NW WITH GUSTS BY
27/2100 VIS GOOD
PENINSULA DE VALDES COASTS(41S - 45S): NW 5 WITH GUSTS BACK SW 4 BY 28/0000
VIS GOOD
GOLFO DE SAN JORGE COASTS(45S - 48S): NW 6/5 WITH GUSTS BACK VRB 4 BY 28/0000
VIS GOOD
SOUTH PATAGONIA COASTS(48S - 54S): NW 6/7 WITH GUSTS BACK SW 6/5 WITH GUSTS BY
27/1500 LOW PROB OF ISOL RAIN IMPR DURING THE MORNING VIS MODERATE TO GOOD
FIN DEL MUNDO COASTS(54S - 55S): SECTOR W 7/6 WITH GUSTS PROB OF ISOL RAIN
IMPR DURING THE EVENING VIS MODERATE OCNL GOOD
ISLAS MALVINAS COASTS: NW 6 WITH GUSTS BACK W 5/4 WITH GUSTS BY 28/0000 PROB OF
ISOL RAIN DURING THE EARLY MORNING IMPR VIS MODERATE TO GOOD
OCEANIC AREAS:
NORTH AREA (35S- 40S AND 20W- 55W) E OF 30W: NW 8/6 WITH GUSTS DECR 4 BY 27/1800
INCR 6 WITH GUSTS BY 28/0600 PROB OF RAIN SPELLS OF GOOD WEATHER VIS VERY POOR
TO POOR OCNL GOOD
W OF 45W: SECTOR W 9 WITH GUSTS DECR 7/5 WITH GUSTS BY 28/1200 PROB OF RAIN
STORMS IMPR DURING THE NIGTH VIS VERY POOR TO MODERATE
REST OF THE AREA: NW 7/9 WITH GUSTS PROB OF RAIN STORMS IMPR TOWARDS THE END OF
THE PERIOD VIS VERY POOR TO MODERATE
CENTRAL EAST AREA (40S- 50S AND 20W- 40W) E OF 25 - N OF 45S: NW 8/6 WITH GUSTS
VEER NE 5/6 WITH GUSTS BY 27/1800 LOW PROB OF ISOL RAIN VIS GOOD OCNL POOR
W OF 25 - N OF 45S: SECTOR E 5/6 WITH GUSTS VEER NW 7/9 WITH GUSTS BY 27/1800
PROB OF HVY RAIN VIS VERY POOR TO POOR
REST OF THE AREA: SECTOR E 6/5 WITH GUSTS INCR 9 WITH GUSTS BY 27/2100 PROB OF
HVY RAIN STARTING EARLY MORNING VIS VERY POOR TO POOR
CENTRAL WEST AREA (40S- 50S AND 40W- 60W) W OF 55W: SECTOR S 5 WITH GUSTS VEER
NW 5/4 WITH GUSTS BY 28/0600 LOW PROB OF ISOL SH IMPR VIS GOOD OCNL MODERATE
E OF 55 - N OF 45S: SECTOR S 9 WITH GUSTS VEER SW 8/7 WITH GUSTS BY 28/0600
PROB OF HVY RAIN IMPR TOWARDS THE END OF THE PERIOD VIS VERY POOR TO POOR
REST OF THE AREA: SW 7 GUST WITH 8 INTENSITY PROB OF RAIN IMPR TOWARDS THE END
OF THE PERIOD VIS VERY POOR TO POOR
SOUTH EAST AREA (50S- 60S AND 20W- 40W) N OF 55S: SECTOR W 4 BACK E 6/7 WITH
GUSTS BY 28/0600 VIS GOOD
REST OF THE AREA: SECTOR W 5/4 WITH GUSTS VEER NW 5 WITH GUSTS BY 28/0300 VIS
GOOD
SOUTH WEST AREA (50S- 60S AND 40W- 60W) E OF 50 - N OF 55S: VRB 3/4 VIS GOOD
W OF 50 - N OF 55S: NW 5/6 WITH GUSTS PROB OF ISOL RAIN VIS GOOD OCNL
MODERATE
E OF 50 - S OF 55S: NW 5/6 WITH GUSTS INCR 7 GUST WITH 8 INTENSITY BY 28/0000
PROB OF ISOL RAIN STARTING EARLY MORNING VIS GOOD TO MODERATE
REST OF THE AREA: NW 7/6 GUST WITH 8 INTENSITY DECR 5 WITH GUSTS BY 28/0600
PROB OF ISOL RAIN VIS MODERATE OCNL GOOD
DRAKE AREA (55S- 60S AND 60W- 67W): SECTOR W 6 WITH GUSTS DECR 5/4 WITH GUSTS BY
28/1200 PROB OF ISOL RAIN VIS MODERATE OCNL POOR
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1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
12:00 UTC 27, APRIL 2026.
NATIONAL WEATHER SERVICE (NWS)
SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS
PART 1 GALE WARNING:
584/2026 STRONG BARIC GRADIENT NORTHER BELLINGSHAUSEN SEA MOV E WEAKENING PROVOKES WINDS FORCE 8 FROM SECTOR W GUST WITH 9 INTENSITY IN 60S-64S 90W-80W UNTIL 27/1800
585/2026 STRONG BARIC GRADIENT SOUTHERN PORTION OF DRAKE STRAIT MAR DE LA FLOTA COASTS MOV SE DEEPENING PROVOKES WINDS FORCE 8 WITH GUST IN 60S-64S 62W-50W UNTIL 28/0600
586/2026 STRONG BARIC GRADIENT NORTHERN WEDDELL SEA MOV E DEEPENING PROVOKES WINDS FORCE 8 WITH GUST IN 60S-65S 50W-35W UNTIL 28/1200
PART 2 GENERAL SYNOPSIS AT 09:00UTC
LOW 964HPA 69S 85W MOV SE DPN EXTENDS CFNT AT 69S 58W 65S 74W 63S 70W MOV E
LOW 980HPA 61S 68W MOV SE DPN
LOW 976HPA 65S 56W MOV SE DPN
RIDGE 70S 39W 66S 38W 63S 35W MOV E WKN
261400 UTC 1.SEA ICE LIMIT 6809S 02000W 6756S 02635W 6110S 02938W 6602S 02952W 6152S 03912W 6342S 04236W 6324S 04624W 6304S 05045W 6305S 05510W 6320S 05819W 6338S 06047W 6607S 06716W 2.ICEBERGS GREATER THAN 10NM A76C 5835S 03613W 16X7NM 3.ICEBERGS SMALLER THAN 10NM ICEBERG1 4721S 02911W 6X3NM ICEBERG2 4755S 02819W 5X3NM ICEBERG3 4731S 02845W 4X2NM ICEBERG4 4718S 02834W 3X1NM ICEBERG5 5752S 03615W 3X1NM ICEBERG6 4314S 03427W 2X1NM ICEBERG7 5843S 03555W 3X1NM 4.ICEBERGS AREA A4100S 02000W 6900S 02000W 4200S 04000W 6400S 04500W B6400S 04500W 6000S 04300W 6200S 06716W 6800S 06716W
PART 3 FORECAST ISSUED 12:00 UTC VALID UNTIL 12:00 UTC 2026-04-28
COASTAL AREAS:
SOUTHERN PORTION OF DRAKE STRAIT W OF 60W: NW 4/5 BACK SECTOR W 5/6 BY 27/1800 PROB OF MIST PROB OFINTERMITTENT RAIN AND SNOW MIXTURE IMPR TOWARDS NIGTH VIS POOR TO MODERATE OCNL GOOD
SOUTHERN PORTION OF DRAKE STRAIT REST OF THE AREA: NW 7/8 INCR NW 9 WITH GUSTS BY 27/1800 PROB OF MIST PROB OFMOD DRIZZLE RAIN SPELLS OF GOOD WEATHER DURING THE NIGTH VIS POOR TO MODERATE
MAR DE LA FLOTA COASTS W OF 60W: NW 4/5 BACK SECTOR W 5/6 BY 27/1800 PROB OF MIST PROB OFINTERMITTENT RAIN AND SNOW MIXTURE IMPR TOWARDS NIGTH VIS POOR TO MODERATE OCNL GOOD
MAR DE LA FLOTA COASTS REST OF THE AREA: NW 7/6 WITH GUSTS BACK SECTOR W 8 WITH GUSTS BY 28/0300 PROB OF MIST PROB OFMOD RAIN AND SNOW MIXTURE SPELLS OF GOOD WEATHER TOWARDS THE END OF THE PERIOD VIS POOR TO MODERATE
GERLACHE STRAIT : NE 6/5 WITH GUSTS DECR NE 5/4 WITH GUSTS BY 28/0300 PROB OF MIST PROB OFISOL SNOW FALL WORSENING DURING THE EVENING VIS GOOD TO MODERATE OCNL POOR
MARGARITA BAY : NE 5/4 INCR NE 7 GUST WITH 8 INTENSITY BY 28/0000 PROB OF MIST PROB OFISOL SNOW FALL WORSENING DURING THE EARLY MORNING VIS MODERATE TO GOOD
EREBUS Y TERROR GULF : NW 6/7 WITH GUSTS DECR NW 5 BY 28/0000 AFTERWARDS SW 8 WITH GUSTS BY 28/0600 PROB OF FOG AND MIST IN PATCHES SPELLS OF GOOD WEATHER DURING THE EVENING VIS GOOD TO MODERATE OCNL VERY POOR
OCEANIC AREAS:
NORTHER BELLINGSHAUSEN SEA N OF 64S: SECTOR W 7/8 GUST WITH 9 INTENSITY DECR SECTOR W 5/6 WITH GUSTS BY 27/2100 PROB OF FOG AND MIST IN PATCHES PROB OFINTERMITTENT RAIN AND SNOW MIXTURE IMPR TOWARDS THE END OF THE PERIOD VIS MODERATE TO VERY POOR
NORTHER BELLINGSHAUSEN SEA REST OF THE AREA: SECTOR N 4/5 BACK SECTOR W 4/3 BY 27/1800 AFTERWARDS SW 4/5 BY 28/0300 PROB OF MIST PROB OFMOD RAIN AND SNOW MIXTURE SPELLS OF GOOD WEATHER DURING THE EVENING VIS POOR TO MODERATE
SOUTHERN BELLINGSHAUSEN SEA (66-73S 70-90W): SE 3/4 VEER SECTOR S 4/3 BY 28/0300 PROB OF FOG AND MIST IN PATCHES PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER DURING THE EVENING VIS VERY POOR TO MODERATE
NORTHERN WEDDELL SEA N OF 65S: SECTOR N 4/5 BACK NW 8 BY 27/2100 PROB OF FOG AND MIST IN PATCHES PROB OFISOL RAIN AND SNOW MIXTURE IMPR TOWARDS THE END OF THE PERIOD VIS MODERATE TO VERY POOR
NORTHERN WEDDELL SEA REST OF THE AREA: SECTOR N 4/5 VEER NE 5/6 WITH GUSTS BY 27/1800 PROB OF MIST PROB OFISOL RAIN AND SNOW MIXTURE WORSENING DURING THE EVENING VIS GOOD TO MODERATE
SOUTHERN WEDDELL SEA (68-78S 20-60W): SECTOR N 3/4 VEER NE 4/5 BY 27/2100 PROB OF FOG AND MIST IN PATCHES PROB OFINTERMITTENT SNOW FALL WORSENING STARTING NOON VIS MODERATE TO VERY POOR=