1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
2026-08-20, 00:00 UTC.
NATIONAL WEATHER SERVICE
SEA ICE AND ICEBERGS ISSUED BY SHN
PRESSURE HPA
BEAUFORT SCALE WINDS.
PART 1 GALE WARNING:
WARNING 384: STRONG BARIC GRADIENT WILL PROVOKE WINDS FORCE 8 FROM SW WITH GUST
IN SOUTH PATAGONIA COASTS FIN DEL MUNDO COASTS ISLAS MALVINAS COASTS DRAKE AREA
(55S- 60S AND 60W- 67W) FROM 20/0900
PART 2 GENERAL SYNOPSIS AT 21:00UTC
191400 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 6001S 05124W 21X12NM
A81 5853S 05059W 28X25NM A76C 5257S 03010W 16X6NM 3.ICEBERGS SMALLER THAN 10NM
D33C 6156S 05423W 9X5NM ICEBERG1 6036S 05056W 5X3NM ICEBERG2 6105S 05349W 5X3NM
ICEBERG3 6125S 05346W 6X4NM ICEBERG4 6123S 05411W 2X1NM 4.ICEBERGS AREA A5602S
02000W 4600S 02000W 5000S 03000W 5400S 03000W B5400S 03000W 5055S 03003W 5400S
04504W 6000S 04500W C6000S 04500W 5400S 04504W 6001S 05600W 6200S 05500W D6200S
05500W 6001S 05600W 6000S 06716W 6300S 06716W
LOW 972HPA 58S 35W MOV E NC EXP 58S 20W BY 20/0900 EXTENDS CFNT AT 58S 34W 53S
29W 44S 43W 42S 55W MOV E ASOCIATED WITH OFNT AT 58S 35W 60S 42W 60S 53W
HIGH 1020HPA 34S 50W MOV NE NC
PART 3 FORECAST ISSUED 00:00 UTC VALID UNTIL 00:00 UTC 2026-08-21
COASTAL AREAS:
INNER RIO DE LA PLATA: SE 3 VEER VRB 3 BY 20/0900 AFTERWARDS SECTOR S 3/4 WITH
GUSTS BY 20/1800 WORSENING WITH PROB OF ISOL RAIN STARTING EARLY MORNING VIS
GOOD TO MODERATE
OUTER RIO DE LA PLATA: VRB 3 VEER SECTOR S 4/6 WITH GUSTS BY 20/1800 WORSENING
WITH PROB OF ISOL RAIN STARTING NOON VIS GOOD TO MODERATE
URUGUAY SOUTH EAST COASTS: SECTOR E 3 VEER SE 4/5 WITH GUSTS BY 20/1500
WORSENING WITH PROB OF HVY RAIN STARTING EARLY MORNING VIS GOOD TO POOR
MAR DEL PLATA COASTS(3617S - 3830S): NW 4 WITH GUSTS BACK SECTOR S 5/6 WITH
GUSTS BY 20/1800 VIS GOOD TO MODERATE
RINCON BAHIA BLANCA COASTS(3830S - 41S): NW 4/5 WITH GUSTS BACK SECTOR S 5/6
GUST WITH 8 INTENSITY BY 20/1200 WORSENING WITH PROB OF SH TOWARDS THE END OF
THE PERIOD VIS GOOD TO MODERATE
PENINSULA DE VALDES COASTS(41S - 45S): SECTOR W 4 BACK SECTOR S 6 GUST WITH 8
INTENSITY BY 20/0600 DECR 5 PROB OF SCT SH VIS MODERATE
GOLFO DE SAN JORGE COASTS(45S - 48S): SW 6 GUST WITH 8 INTENSITY PROB OF SH
RAIN AND SNOW MIXTURE VIS MODERATE OCNL POOR
SOUTH PATAGONIA COASTS(48S - 54S): SW 7/8 WITH GUSTS PROB OF SH OF SNOW SNOW
FALL VIS POOR
FIN DEL MUNDO COASTS(54S - 55S): SW 7/8 WITH GUSTS PROB OF SH OF SNOW SNOW
FALL VIS POOR.
ISLAS MALVINAS COASTS: SW 5/6 GUST WITH 8 INTENSITY INCR 8 WITH GUSTS BY 20/0600
PROB OF SH OF SNOW SNOW FALL VIS POOR
OCEANIC AREAS:
NORTH AREA (35S- 40S AND 20W- 55W) E OF 35W: SW 5 VEER W 5/4 BY 20/1500 LOW PROB
OF SH IMPR DURING THE EARLY MORNING VIS MODERATE TO GOOD
E OF 45W: SECTOR W 5 VEER NW 5/6 WITH GUSTS BY 20/1800 WORSENING WITH PROB OF
RAIN TOWARDS THE END OF THE PERIOD VIS GOOD TO MODERATE OCNL POOR
REST OF THE AREA: SECTOR W 5 BACK SECTOR S 6 WITH GUSTS BY 20/2100 WORSENING
WITH PROB OF HVY RAIN STARTING NOON VIS GOOD TO MODERATE OCNL POOR
CENTRAL EAST AREA (40S- 50S AND 20W- 40W) N OF 45 - E OF 30W: SW 4 VEER W 5/6
WITH GUSTS BY 20/0900 PROB OF ISOL RAIN SPELLS OF GOOD WEATHER VIS MODERATE
E OF 30 - S OF 45S: NW 5 WITH GUSTS BACK SECTOR W 5/6 WITH GUSTS BY 20/0900
PROB OF ISOL RAIN NXT SH RAIN VIS MODERATE
REST OF THE AREA: SECTOR W 5 WITH GUSTS PROB OF ISOL RAIN NXT SH RAIN SPELLS OF
GOOD WEATHER VIS MODERATE OCNL POOR
CENTRAL WEST AREA (40S- 50S AND 40W- 60W) E OF 50W: SECTOR W 5 WITH GUSTS BACK
SW 6/7 GUST WITH 8 INTENSITY BY 20/1800 PROB OF SH RAIN STARTING NOON NXT SH OF
SNOW SNOW FALL VIS GOOD TO POOR
W OF 50 - N OF 45S: NW 4/5 BACK SECTOR S 6/7 GUST WITH 8 INTENSITY BY 20/1200
PROB OF ISOL RAIN NXT SH RAIN AND SNOW MIXTURE VIS GOOD TO MODERATE OCNL POOR
REST OF THE AREA: SECTOR W 5 WITH GUSTS BACK SW 6/7 GUST WITH 8 INTENSITY BY
20/0600 PROB OF ISOL RAIN NXT SH OF SNOW SNOW FALL VIS MODERATE TO POOR
SOUTH EAST AREA (50S- 60S AND 20W- 40W) E OF 30W: NW 6 GUST WITH 8 INTENSITY
BACK SECTOR W 6 WITH GUSTS BY 20/0600 PROB OF SH RAIN NXT ISOL SNOW FALL VIS
POOR
REST OF THE AREA: SECTOR W 6/7 GUST WITH 8 INTENSITY PROB OF ISOL SNOW FALL VIS
POOR
SOUTH WEST AREA (50S- 60S AND 40W- 60W) E OF 50W: SECTOR W 6/7 GUST WITH 8
INTENSITY BACK SW 6 GUST WITH 8 INTENSITY BY 20/1200 PROB OF ISOL SNOW FALL VIS
POOR
REST OF THE AREA: SW 6/7 GUST WITH 8 INTENSITY PROB OF SH OF SNOW SNOW FALL VIS
POOR
DRAKE AREA (55S- 60S AND 60W- 67W): SW 7/8 WITH GUSTS PROB OF SH OF SNOW SNOW
FALL VIS POOR OCNL VERY POOR
-----------------------------------------------------------------
NNNN=
1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
00:00 UTC 20, AUGUST 2026.
NATIONAL WEATHER SERVICE (NWS)
SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS
PART 1 GALE WARNING:
1088/2026 STRONG BARIC GRADIENT MAR DE LA FLOTA COASTS MOV E DEEPENING PROVOKES WINDS FORCE 8 FROM SE WITH GUST IN 62S-64S 58W-54W UNTIL 20/1500
1089/2026 STRONG BARIC GRADIENT NORTHERN WEDDELL SEA MOV E DEEPENING PROVOKES WINDS FORCE 8 FROM SECTOR E WITH GUST IN 61S-65S 40W-30W UNTIL 20/1800
1090/2026 STRONG BARIC GRADIENT SOUTHERN BELLINGSHAUSEN SEA MOV NE DEEPENING WILL PROVOKE WINDS FORCE 8 FROM SECTOR W WITH GUST IN 70S-73S 90W-75W FROM 20/2100 UNTIL 21/0300
PART 2 GENERAL SYNOPSIS AT 21:00UTC
LOW 966HPA 60S 43W MOV SE DPN
LOW 982HPA 63S 55W MOV E WKN
LOW 987HPA 70S 75W MOV E WKN
HIGH 998HPA 69S 32W MOV E WKN
RIDGE 60S 80W 65S 78W 70S 78W MOV E INTSF
191400 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 6001S 05124W 21X12NM A81 5853S 05059W 28X25NM A76C 5257S 03010W 16X6NM 3.ICEBERGS SMALLER THAN 10NM D33C 6156S 05423W 9X5NM ICEBERG1 6036S 05056W 5X3NM ICEBERG2 6105S 05349W 5X3NM ICEBERG3 6125S 05346W 6X4NM ICEBERG4 6123S 05411W 2X1NM 4.ICEBERGS AREA A5602S 02000W 4600S 02000W 5000S 03000W 5400S 03000W B5400S 03000W 5055S 03003W 5400S 04504W 6000S 04500W C6000S 04500W 5400S 04504W 6001S 05600W 6200S 05500W D6200S 05500W 6001S 05600W 6000S 06716W 6300S 06716W
PART 3 FORECAST ISSUED 00:00 UTC VALID UNTIL 00:00 UTC 2026-08-21
COASTAL AREAS:
SOUTHERN PORTION OF DRAKE STRAIT W OF 60W: SW 5/6 WITH GUSTS DECR SW 5/4 WITH GUSTS BY 20/1200 PROB OF FOG AND MIST IN PATCHES PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER DURING THE EARLY MORNING VIS VERY POOR TO MODERATE
SOUTHERN PORTION OF DRAKE STRAIT REST OF THE AREA: SE 7/8 BACK SECTOR S 8 WITH GUSTS BY 20/1200 PROB OF FOG AND MIST IN PATCHES PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER TOWARDS NOON VIS VERY POOR TO MODERATE
MAR DE LA FLOTA COASTS W OF 60W: SW 5/6 WITH GUSTS DECR SW 5/4 BY 20/1200 PROB OF FOG AND MIST IN PATCHES PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER DURING THE EARLY MORNING VIS VERY POOR TO MODERATE
MAR DE LA FLOTA COASTS REST OF THE AREA: SE 7/8 BACK SECTOR S 8 WITH GUSTS BY 20/1200 PROB OF FOG AND MIST IN PATCHES PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER TOWARDS NOON VIS VERY POOR TO MODERATE
GERLACHE STRAIT : SECTOR E 3/4 VEER SECTOR S 3/4 BY 20/1200 PROB OF MIST PROB OFISOL SNOW FALL SPELLS OF GOOD WEATHER DURING THE MORNING VIS VERY POOR TO MODERATE
MARGARITA BAY : NE 4/3 BACK SECTOR N 4/3 BY 20/1200 PROB OF MIST VIS MODERATE TO GOOD
EREBUS Y TERROR GULF : SECTOR S 7 WITH GUSTS VEER SW 6/5 WITH GUSTS BY 20/1800 PROB OF MIST BLIZZARD SPELLS OF GOOD WEATHER TOWARDS THE END OF THE PERIOD VIS VERY POOR TO MODERATE
OCEANIC AREAS:
NORTHER BELLINGSHAUSEN SEA N OF 64S: SECTOR W 6/7 GUST WITH 8 INTENSITY BACK SW 7 GUST WITH 8 INTENSITY BY 20/1800 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER STARTING EVENING VIS POOR TO MODERATE
NORTHER BELLINGSHAUSEN SEA REST OF THE AREA: SW 5/4 VEER SECTOR W 5/7 WITH GUSTS BY 20/1500 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER STARTING NOON VIS POOR TO MODERATE
SOUTHERN BELLINGSHAUSEN SEA (66-73S 70-90W): NE 3/4 BACK NW 5/6 BY 20/1200 PROB OF FOG AND MIST IN PATCHES PROB OFISOL SNOW FALL WORSENING DURING THE EARLY MORNING VIS MODERATE TO VERY POOR
NORTHERN WEDDELL SEA N OF 64S: SECTOR E 6/7 GUST WITH 8 INTENSITY VEER SE 8 WITH GUSTS BY 20/1200 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 REST OF THE AREA: SECTOR E 5/4 VEER SE 4 BY 20/1200 PROB OF FOG AND MIST IN PATCHES WORSENING TOWARDS NIGTH VIS MODERATE TO VERY POOR
SOUTHERN WEDDELL SEA (68-78S 20-60W): SE 5/6 WITH GUSTS VEER SE 5/4 BY 20/1200 PROB OF MIST VIS MODERATE TO GOOD=