1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
2026-04-28, 00:00 UTC.
NATIONAL WEATHER SERVICE
SEA ICE AND ICEBERGS ISSUED BY SHN
PRESSURE HPA
BEAUFORT SCALE WINDS.
PART 1 GALE WARNING:
WARNING 178: LOW 975HPA AT 41S 43W MOV SE WEAKENING EXPECTED 44S 34W BY 28/1800
PROVOKES WINDS FORCE 9 AROUND ITSELF WITH GUST BETWEEN 35S-50S AND 30W-55W
PART 2 GENERAL SYNOPSIS AT 21:00UTC
271400 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 03623W 16X7NM
3.ICEBERGS SMALLER THAN 10NM ICEBERG1 4744S 02849W 6X3NM ICEBERG2 5003S 02709W
5X3NM ICEBERG3 4718S 02834W 2X1NM ICEBERG4 4756S 02819W 4X2NM ICEBERG5 5752S
03615W 3X1NM ICEBERG6 5843S 03555W 3X1NM 4.ICEBERGS AREA A4100S 02000W 6900S
02000W 4200S 04000W 6400S 04500W B6400S 04500W 6000S 04300W 6200S 06716W 6800S
06716W
LOW 975HPA 41S 43W MOV SE WKN EXTENDS CFNT AT 40S 36W 36S 36W MOV NE ASOCIATED
WITH OFNT AT 46S 46W 40S 50W
HIGH 1014HPA 52S 32W MOV E NC
CFNT AT ISLAS MALVINAS COASTS GOLFO DE SAN JORGE COASTS MOV E
PART 3 FORECAST ISSUED 00:00 UTC VALID UNTIL 00:00 UTC 2026-04-29
COASTAL AREAS:
INNER RIO DE LA PLATA: SECTOR W 4 WITH GUSTS VEER NW WITH GUSTS BY 28/1500 VIS
GOOD
OUTER RIO DE LA PLATA: SECTOR W 5 WITH GUSTS VEER NW 4 WITH GUSTS BY 28/1800
PROB OF ISOL RAIN IMPR DURING THE EARLY MORNING VIS MODERATE TO GOOD
URUGUAY SOUTH EAST COASTS: SW 6/5 WITH GUSTS VEER W 4 BY 28/1800 PROB OF MIST
RAIN IMPR STARTING EARLY MORNING VIS MODERATE TO GOOD
MAR DEL PLATA COASTS(3617S - 3830S): SW 4 VEER NW BY 28/1500 PROB OF ISOL RAIN
IMPR DURING THE EARLY MORNING VIS MODERATE TO GOOD
RINCON BAHIA BLANCA COASTS(3830S - 41S): SW 4 VEER NW BY 28/1500 PROB OF ISOL
RAIN IMPR DURING THE EARLY MORNING VIS MODERATE TO GOOD.
PENINSULA DE VALDES COASTS(41S - 45S): SW 4 VEER SECTOR N 5/6 WITH GUSTS BY
28/1500 PROB OF RAIN TOWARDS THE END OF THE PERIOD VIS GOOD TO MODERATE
GOLFO DE SAN JORGE COASTS(45S - 48S): SECTOR S 3 VEER SECTOR N 5/6 WITH GUSTS
BY 28/1200 PROB OF RAIN STARTING EVENING VIS MODERATE TO POOR
SOUTH PATAGONIA COASTS(48S - 54S): SW 6 WITH GUSTS VEER SECTOR N 6 WITH GUSTS
BY 28/1200 PROB OF RAIN STARTING EVENING VIS MODERATE TO POOR
FIN DEL MUNDO COASTS(54S - 55S): NW 5 PROB OF RAIN STARTING EVENING VIS GOOD
TO MODERATE
ISLAS MALVINAS COASTS: NW 5 PROB OF ISOL RAIN SPELLS OF GOOD WEATHER VIS
MODERATE
OCEANIC AREAS:
NORTH AREA (35S- 40S AND 20W- 55W) E OF 30W: NW 7/8 WITH GUSTS PROB OF RAIN
STORMS VIS VERY POOR TO POOR
W OF 30 - E OF 45W: SECTOR W 9/8 WITH GUSTS PROB OF SH RAIN VIS VERY POOR
REST OF THE AREA: SW 8/7 WITH GUSTS DECR 5 BY 28/1200 PROB OF SH RAIN SPELLS OF
GOOD WEATHER VIS POOR TO MODERATE
CENTRAL EAST AREA (40S- 50S AND 20W- 40W) E OF 30 - N OF 45S: SECTOR N 8 WITH
GUSTS BACK NW WITH GUSTS BY 28/1800 PROB OF ISOL RAIN STORMS VIS VERY POOR
E OF 30 - S OF 45S: SECTOR E 7/8 WITH GUSTS PROB OF RAIN STARTING EARLY MORNING
VIS VERY POOR TO POOR
W OF 30 - N OF 45S: NW 9 WITH GUSTS BACK W 9 WITH GUSTS BY 28/1500 PROB OF SH
RAIN VIS VERY POOR
REST OF THE AREA: SECTOR E 8 WITH GUSTS PROB OF RAIN VIS VERY POOR
CENTRAL WEST AREA (40S- 50S AND 40W- 60W) E OF 50 - N OF 45S: SW 8/7 WITH GUSTS
PROB OF SH RAIN SPELLS OF GOOD WEATHER VIS VERY POOR TO POOR
E OF 50 - S OF 45S: SECTOR S 8/7 WITH GUSTS PROB OF SH RAIN VIS POOR TO
MODERATE
W OF 50 - N OF 45S: SW 6 GUST WITH 8 INTENSITY VEER NW 4 BY 28/1500 PROB OF
ISOL RAIN VIS MODERATE
REST OF THE AREA: NW 4 PROB OF ISOL RAIN SPELLS OF GOOD WEATHER VIS GOOD OCNL
MODERATE
SOUTH EAST AREA (50S- 60S AND 20W- 40W) N OF 55S: SECTOR E 5/7 GUST WITH 8
INTENSITY PROB OF RAIN STARTING EVENING VIS GOOD TO MODERATE OCNL POOR
REST OF THE AREA: NW 4/5 VIS GOOD OCNL MODERATE
SOUTH WEST AREA (50S- 60S AND 40W- 60W) E OF 50 - N OF 55S: SECTOR N 4 VIS
GOOD
REST OF THE AREA: NW 7/6 GUST WITH 8 INTENSITY PROB OF SH RAIN AND SNOW MIXTURE
VIS MODERATE OCNL POOR
DRAKE AREA (55S- 60S AND 60W- 67W): NW 6/5 WITH GUSTS PROB OF RAIN VIS MODERATE
OCNL POOR
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1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
00:00 UTC 28, APRIL 2026.
NATIONAL WEATHER SERVICE (NWS)
SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS
PART 1 GALE WARNING:
587/2026 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 60W-50W UNTIL 28/0600
588/2026 STRONG BARIC GRADIENT NORTHERN WEDDELL SEA MOV E DEEPENING PROVOKES WINDS FORCE 8 GUST WITH 9 INTENSITY IN 60S-65S 50W-35W UNTIL 28/1800
PART 2 GENERAL SYNOPSIS AT 21:00UTC
LOW 966HPA 69S 75W MOV SE DPN
LOW 973HPA 62S 61W MOV SE DPN
RIDGE 70S 32W 66S 321W 62S 30W MOV E WKN
271400 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 03623W 16X7NM 3.ICEBERGS SMALLER THAN 10NM ICEBERG1 4744S 02849W 6X3NM ICEBERG2 5003S 02709W 5X3NM ICEBERG3 4718S 02834W 2X1NM ICEBERG4 4756S 02819W 4X2NM ICEBERG5 5752S 03615W 3X1NM ICEBERG6 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 00:00 UTC VALID UNTIL 00:00 UTC 2026-04-29
COASTAL AREAS:
SOUTHERN PORTION OF DRAKE STRAIT W OF 60W: SECTOR W 4/5 VEER NW 4/3 BY 28/1500 PROB OF MIST PROB OFINTERMITTENT RAIN AND SNOW MIXTURE SPELLS OF GOOD WEATHER DURING THE EARLY MORNING VIS POOR TO MODERATE OCNL GOOD
SOUTHERN PORTION OF DRAKE STRAIT REST OF THE AREA: NW 7/8 GUST WITH 8 INTENSITY DECR NW 6/5 WITH GUSTS BY 28/0900 PROB OF MIST PROB OFMOD RAIN AND SNOW MIXTURE SPELLS OF GOOD WEATHER TOWARDS THE END OF THE PERIOD VIS POOR TO MODERATE
MAR DE LA FLOTA COASTS W OF 60W: SECTOR W 4/5 VEER NW 4/3 BY 28/1500 PROB OF MIST PROB OFINTERMITTENT RAIN AND SNOW MIXTURE SPELLS OF GOOD WEATHER DURING THE EARLY MORNING VIS POOR TO MODERATE OCNL GOOD
MAR DE LA FLOTA COASTS REST OF THE AREA: NW 7/8 GUST WITH 9 INTENSITY DECR NW 6/5 WITH GUSTS BY 28/1200 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 5/4 WITH GUSTS DECR NW 4/3 BY 28/0900 PROB OF MIST PROB OFMOD SNOW FALL IMPR DURING THE EVENING VIS POOR TO MODERATE OCNL GOOD
MARGARITA BAY : NE 6/7 GUST WITH 8 INTENSITY DECR NE 6/5 WITH GUSTS BY 28/1500 PROB OF MIST PROB OFISOL SNOW FALL WORSENING DURING THE MORNING VIS MODERATE TO GOOD
EREBUS Y TERROR GULF : NW 6/7 WITH GUSTS DECR NW 5 BY 28/0600 AFTERWARDS SW 8 WITH GUSTS BY 28/1200 PROB OF FOG AND MIST IN PATCHES PROB OFINTERMITTENT SNOW FALL IMPR TOWARDS THE END OF THE PERIOD VIS MODERATE TO VERY POOR
OCEANIC AREAS:
NORTHER BELLINGSHAUSEN SEA N OF 64S: SECTOR W 6/5 WITH GUSTS DECR NW 4/3 WITH GUSTS BY 28/1800 PROB OF FOG AND MIST IN PATCHES PROB OFINTERMITTENT RAIN AND SNOW MIXTURE SPELLS OF GOOD WEATHER DURING THE EVENING VIS VERY POOR TO MODERATE
NORTHER BELLINGSHAUSEN SEA REST OF THE AREA: SW 5/4 VEER SECTOR W 4/3 BY 28/1500 PROB OF MIST PROB OFISOL SNOW FALL SPELLS OF GOOD WEATHER STARTING NOON VIS POOR TO MODERATE
SOUTHERN BELLINGSHAUSEN SEA (66-73S 70-90W): SECTOR S 3/4 VEER SW 4/3 BY 28/1800 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: NW 7/8 GUST WITH 9 INTENSITY DECR NW 7/5 BY 28/1800 PROB OF FOG AND MIST IN PATCHES PROB OFINTERMITTENT RAIN AND SNOW MIXTURE IMPR TOWARDS THE END OF THE PERIOD VIS VERY POOR TO MODERATE
NORTHERN WEDDELL SEA REST OF THE AREA: NE 5/7 WITH GUSTS BACK SECTOR N 5/4 BY 28/0900 PROB OF FOG AND MIST IN PATCHES PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER TOWARDS THE END OF THE PERIOD VIS MODERATE TO VERY POOR
SOUTHERN WEDDELL SEA (68-78S 20-60W): SECTOR N 3/4 VEER NE 5/7 WITH GUSTS BY 28/1200 PROB OF FOG AND MIST IN PATCHES PROB OFINTERMITTENT SNOW FALL IMPR TOWARDS THE END OF THE PERIOD VIS VERY POOR TO MODERATE=