1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
2026-08-25, 00:00 UTC.
NATIONAL WEATHER SERVICE
SEA ICE AND ICEBERGS ISSUED BY SHN
PRESSURE HPA
BEAUFORT SCALE WINDS.
PART 1 GALE WARNING:
WARNING 392: STRONG BARIC GRADIENT PROVOKES WINDS FORCE 8 FROM NE WITH GUST IN
PENINSULA DE VALDES COASTS GOLFO DE SAN JORGE COASTS
WARNING 389: LOW 979HPA AT 46S 32W MOV E WEAKENING PROVOKES WINDS FORCE 8 AROUND
ITSELF WITH GUST
PART 2 GENERAL SYNOPSIS AT 21:00UTC
PART 3 FORECAST ISSUED 00:00 UTC VALID UNTIL 00:00 UTC 2026-08-26
COASTAL AREAS:
INNER RIO DE LA PLATA: E 4/5 BACK NE 5/4 VIS GOOD
OUTER RIO DE LA PLATA: E 4/5 BACK NE 5/4 VIS GOOD
URUGUAY SOUTH EAST COASTS: E 4 BACK NE VEER E 4/5 VIS GOOD
MAR DEL PLATA COASTS(3617S - 3830S): E 4 BACK NE 4/5 WITH GUSTS VIS GOOD
RINCON BAHIA BLANCA COASTS(3830S - 41S): NE 5 WITH GUSTS BACK N 6/5 WITH GUSTS
PROB OF ISOL RAIN VIS GOOD OCNL MODERATE
PENINSULA DE VALDES COASTS(41S - 45S): NE 8 WITH GUSTS BACK N 6/5 PROB OF RAIN
IMPR VIS MODERATE OCNL POOR TO GOOD
GOLFO DE SAN JORGE COASTS(45S - 48S): NE 8 WITH GUSTS BACK N 6/5 PROB OF ISOL
RAIN IMPR VIS MODERATE OCNL POOR TO GOOD
SOUTH PATAGONIA COASTS(48S - 54S): NE 6 WITH GUSTS DECR VRB 4 BACK PROB OF
ISOL DRIZZLE RAIN PROB OF MIST VIS MODERATE OCNL POOR
FIN DEL MUNDO COASTS(54S - 55S): N 5/6 WITH GUSTS DECR 4 PROB OF DRIZZLE NXT
RAIN MIST VIS MODERATE OCNL POOR
ISLAS MALVINAS COASTS: N 5 VEER NE 6 WITH GUSTS PROB OF DRIZZLE NXT PROB OF MIST
RAIN VIS MODERATE OCNL POOR
OCEANIC AREAS:
NORTH AREA (35S- 40S AND 20W- 55W) E OF 30W: SECTOR W 6/8 WITH GUSTS PROB OF SH
RAIN VIS MODERATE TO POOR
W OF 45W: SW 5/3 LOW PROB OF ISOL RAIN VIS GOOD OCNL MODERATE
REST OF THE AREA: SW 8 WITH GUSTS DECR PROB OF SH RAIN VIS POOR TO MODERATE
CENTRAL EAST AREA (40S- 50S AND 20W- 40W) W OF 30 - N OF 45S: SW 8 WITH GUSTS
PROB OF SH RAIN VIS POOR OCNL VERY POOR
E OF 30 - N OF 45S: NW 6 WITH GUSTS BACK W 6/7 WITH GUSTS PROB OF SH RAIN VIS
MODERATE OCNL POOR
W OF 30 - S OF 45S: SECTOR S 8/7 WITH GUSTS PROB OF SH RAIN VIS POOR TO
MODERATE
REST OF THE AREA: NE 5 WITH GUSTS VEER S WITH GUSTS PROB OF SH RAIN VIS
MODERATE OCNL POOR
CENTRAL WEST AREA (40S- 50S AND 40W- 60W) E OF 45W: SW 8 WITH GUSTS DECR PROB OF
ISOL RAIN VIS MODERATE OCNL POOR
W OF 50W: VRB 4 BACK SECTOR N 5/6 WITH GUSTS PROB OF ISOL RAIN SPELLS OF GOOD
WEATHER VIS MODERATE OCNL GOOD
REST OF THE AREA: SECTOR S 6 WITH GUSTS DECR PROB OF ISOL RAIN VIS MODERATE TO
GOOD
SOUTH EAST AREA (50S- 60S AND 20W- 40W) W OF 30 - N OF 55S: SE 8 WITH GUSTS VEER
S 7/6 WITH GUSTS PROB OF ISOL RAIN IMPR VIS POOR TO MODERATE
E OF 30 - N OF 55S: E 7/4 WITH GUSTS VEER SECTOR S 4/5 WITH GUSTS PROB OF ISOL
RAIN VIS MODERATE OCNL GOOD
REST OF THE AREA: SE 6/5 WITH GUSTS VEER S 5 WITH GUSTS UNSTABLE VIS GOOD OCNL
MODERATE
SOUTH WEST AREA (50S- 60S AND 40W- 60W) E OF 50 - N OF 55S: SECTOR S 7/6 WITH
GUSTS DECR 5/4 UNSTABLE VIS GOOD OCNL MODERATE
REST OF THE AREA: NW 4 INCR 5 WITH GUSTS UNSTABLE VIS GOOD OCNL MODERATE
DRAKE AREA (55S- 60S AND 60W- 67W): NE 5/4 WITH GUSTS BACK NW 4 PROB OF ISOL
RAIN VIS MODERATE
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1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
12:00 UTC 24, AUGUST 2026.
NATIONAL WEATHER SERVICE (NWS)
SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS
PART 1 GALE WARNING:
1103/2026 STRONG BARIC GRADIENT NORTHERN WEDDELL SEA MOV E DEEPENING PROVOKES WINDS FORCE 8 WITH GUST IN 63S-67S 40W-70W UNTIL 24/2100
PART 2 GENERAL SYNOPSIS AT 09:00UTC
LOW 1008HPA 62S 60W MOV E WKN
HIGH 1002HPA 66S 58W MOV E WKN
RIDGE 60S 60W 62S 68W 66S 75W MOV E WKN
231400 UTC 1.SEA ICE LIMIT 5547S 02000W 5416S 02618W 5352S 03217W 5617S 03757W 5825S 04316W 5953S 04814W 6047S 05247W 6215S 05654W 6338S 06032W 6135S 06337W 6213S 06558W 6233S 06716W 2.ICEBERGS GREATER THAN 10NM D33B 6016S 05008W 21X12NM A81 5841S 05051W 28X25NM A76C 5322S 03005W 16X6NM 3.ICEBERGS SMALLER THAN 10NM D33C 6158S 05358W 9X5NM ICEBERG1 5935S 05020W 5X3NM ICEBERG2 6105S 05418W 5X3NM ICEBERG3 6123S 05404W 6X4NM ICEBERG4 6112S 05418W 2X1NM ICEBERG5 6108S 05414W 3X1NM 4.ICEBERGS AREA A5600S 02000W 4500S 02000W 5200S 04500W 6000S 04500W B5300S 04500W 6600S 04500W 6200S 06716W 6600S 06716W
PART 3 FORECAST ISSUED 12:00 UTC VALID UNTIL 12:00 UTC 2026-08-25
COASTAL AREAS:
SOUTHERN PORTION OF DRAKE STRAIT W OF 60W: N 3/4 VEER NE 3/4 BY 24/2100 PROB OF MIST PROB OFISOL SNOW FALL WORSENING STARTING NOON VIS GOOD TO MODERATE OCNL POOR
SOUTHERN PORTION OF DRAKE STRAIT REST OF THE AREA: SECTOR W 4/5 VEER NW 5/6 WITH GUSTS BY 24/1500 PROB OF MIST PROB OFINTERMITTENT SNOW FALL WORSENING DURING THE EVENING VIS MODERATE TO POOR
MAR DE LA FLOTA COASTS W OF 60W: SECTOR N 3/4 VEER NE 3/4 BY 24/2100 PROB OF MIST PROB OFISOL SNOW FALL WORSENING STARTING NOON VIS GOOD TO MODERATE OCNL POOR
MAR DE LA FLOTA COASTS REST OF THE AREA: SECTOR W 4/5 VEER NW 5/6 WITH GUSTS BY 24/1500 PROB OF MIST PROB OFINTERMITTENT SNOW FALL WORSENING DURING THE EVENING VIS MODERATE TO POOR
GERLACHE STRAIT : SECTOR E 3/4 BACK NE 4/3 BY 25/0000 PROB OF FOG AND MIST IN PATCHES PROB OFISOL SNOW FALL IMPR TOWARDS THE END OF THE PERIOD VIS VERY POOR TO MODERATE
MARGARITA BAY : SECTOR N 4/3 BACK SW 4/3 BY 25/0000 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER DURING THE NOON VIS VERY POOR TO MODERATE
EREBUS Y TERROR GULF : SW 3/4 BACK SECTOR E 4/5 BY 24/2100 PROB OF FOG AND MIST IN PATCHES SPELLS OF GOOD WEATHER DURING THE EVENING VIS VERY POOR TO MODERATE OCNL GOOD
OCEANIC AREAS:
NORTHER BELLINGSHAUSEN SEA N OF 64S: SECTOR N 3/4 VEER NE 4/5 BY 24/1800 PROB OF MIST PROB OFINTERMITTENT SNOW FALL WORSENING TOWARDS NOON VIS GOOD TO MODERATE OCNL POOR
NORTHER BELLINGSHAUSEN SEA REST OF THE AREA: SECTOR S 4/5 BACK SE 4/3 BY 24/2100 PROB OF MIST PROB OFISOL SNOW FALL WORSENING TOWARDS NOON VIS GOOD TO MODERATE OCNL POOR
SOUTHERN BELLINGSHAUSEN SEA (66-73S 70-90W): SECTOR W 7/5 WITH GUSTS BACK SW 4/5 BY 24/1800 PROB OF FOG AND MIST IN PATCHES PROB OFISOL SNOW FALL SPELLS OF GOOD WEATHER STARTING NOON VIS VERY POOR TO MODERATE OCNL GOOD
NORTHERN WEDDELL SEA N OF 64S: NW 7/8 WITH GUSTS BACK SECTOR W 5/4 BY 24/2100 PROB OF FOG AND MIST IN PATCHES WORSENING TOWARDS NOON VIS GOOD TO MODERATE OCNL VERY POOR
NORTHERN WEDDELL SEA REST OF THE AREA: SECTOR W 7/8 WITH GUSTS BACK SW 4 BY 24/2100 PROB OF FOG AND MIST IN PATCHES WORSENING TOWARDS NOON VIS GOOD TO MODERATE OCNL VERY POOR
SOUTHERN WEDDELL SEA (68-78S 20-60W): SECTOR N 5/4 VEER NE 4 BY 24/2100 PROB OF MIST PROB OFINTERMITTENT SNOW FALL IMPR STARTING EVENING VIS VERY POOR TO MODERATE OCNL GOOD=