1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
2026-08-20, 12:00 UTC.
NATIONAL WEATHER SERVICE
SEA ICE AND ICEBERGS ISSUED BY SHN
PRESSURE HPA
BEAUFORT SCALE WINDS.
PART 1 GALE WARNING:
WARNING 385: STRONG BARIC GRADIENT WILL PROVOKE WINDS FORCE 8 FROM SECTOR S WITH
GUST IN DRAKE AREA (55S- 60S AND 60W- 67W) FROM 21/0900
PART 2 GENERAL SYNOPSIS AT 09:00UTC
LOW 1005HPA 42S 57W WKN EXTENDS CFNT42S 57W 40S 60W 39S 61W MOV NE
LOW 969HPA 59S 41W MOV E DPN EXP 27S 59W BY 21/1200 EXTENDS OFNT AT 58S 21W 62S
40W 57S 44W
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 12:00 UTC VALID UNTIL 12:00 UTC 2026-08-21
COASTAL AREAS:
INNER RIO DE LA PLATA: VRB 3 BACK SECTOR S 4 WITH GUSTS BY 20/2100 MIST FOG
PATCHES DURING THE MORNING DISSIPATING VIS GOOD OCNL MODERATE
OUTER RIO DE LA PLATA: VRB 3 BACK SECTOR S 4 WITH GUSTS BY 20/2100 MIST FOG
PATCHES DURING THE MORNING DISSIPATING VIS GOOD OCNL MODERATE
URUGUAY SOUTH EAST COASTS: VRB 3 BACK SECTOR S 4 WITH GUSTS BY 20/2100 MIST FOG
PATCHES DURING THE MORNING DISSIPATING VIS GOOD OCNL MODERATE
MAR DEL PLATA COASTS(3617S - 3830S): SECTOR N 4/5 WITH GUSTS BACK SECTOR S 6
WITH GUSTS BY 20/2100 VIS GOOD OCNL MODERATE
RINCON BAHIA BLANCA COASTS(3830S - 41S): SECTOR W 5 WITH GUSTS BACK SECTOR S
WITH GUSTS BY 20/1800 LOW PROB OF ISOL RAIN STARTING EVENING VIS GOOD OCNL
MODERATE
PENINSULA DE VALDES COASTS(41S - 45S): SECTOR S 6/5 WITH GUSTS LOW PROB OF
ISOL RAIN STARTING EVENING VIS GOOD OCNL MODERATE
GOLFO DE SAN JORGE COASTS(45S - 48S): SECTOR S 6/5 WITH GUSTS LOW PROB OF ISOL
RAIN STARTING EVENING VIS GOOD OCNL MODERATE
SOUTH PATAGONIA COASTS(48S - 54S): SECTOR S 6 WITH GUSTS PROB OF ISOL RAIN VIS
MODERATE
FIN DEL MUNDO COASTS(54S - 55S): SECTOR S 7 WITH GUSTS RAIN VIS POOR
ISLAS MALVINAS COASTS: SECTOR S 7 WITH GUSTS RAIN VIS POOR.
OCEANIC AREAS:
NORTH AREA (35S- 40S AND 20W- 55W) W OF 40W: SECTOR N 5/6 WITH GUSTS BACK SECTOR
S BY 21/0000 RAIN VIS POOR
REST OF THE AREA: SECTOR W 5/7 VEER SECTOR N WITH GUSTS BY 21/0900 PROB OF RAIN
STARTING EVENING VIS MODERATE OCNL POOR
CENTRAL EAST AREA (40S- 50S AND 20W- 40W): SECTOR W 5/6 WITH GUSTS PROB OF ISOL
RAIN VIS MODERATE
CENTRAL WEST AREA (40S- 50S AND 40W- 60W): SECTOR W 5/6 WITH GUSTS BACK SECTOR S
WITH GUSTS BY 20/1500 PROB OF RAIN AND SNOW MIXTURE VIS MODERATE
SOUTH EAST AREA (50S- 60S AND 20W- 40W): SECTOR W 6/5 WITH GUSTS PROB OF RAIN
AND SNOW MIXTURE VIS MODERATE
SOUTH WEST AREA (50S- 60S AND 40W- 60W): SECTOR S 6/7 WITH GUSTS RAIN AND SNOW
MIXTURE VIS POOR
DRAKE AREA (55S- 60S AND 60W- 67W): SECTOR S 7 WITH GUSTS INCR 8 WITH GUSTS BY
21/0900 RAIN AND SNOW MIXTURE VIS MODERATE TO POOR
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1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
12:00 UTC 20, AUGUST 2026.
NATIONAL WEATHER SERVICE (NWS)
SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS
PART 1 GALE WARNING:
1091/2026 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
1092/2026 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
1093/2026 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 09:00UTC
LOW 964HPA 60S 40W MOV SE DPN
LOW 990HPA 61S 60W MOV E WKN
LOW 984HPA 72S 85W MOV E DPN
HIGH 997HPA 69S 31W MOV E DPN
RIDGE 60S 80W 65S 75W 68S 70W 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 12:00 UTC VALID UNTIL 12:00 UTC 2026-08-21
COASTAL AREAS:
SOUTHERN PORTION OF DRAKE STRAIT W OF 60W: SW 5/6 WITH GUSTS VEER SECTOR W 6 WITH GUSTS BY 21/0300 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER DURING THE EVENING VIS POOR TO MODERATE OCNL GOOD
SOUTHERN PORTION OF DRAKE STRAIT REST OF THE AREA: SECTOR S 7/6 WITH GUSTS VEER SW 5 WITH GUSTS BY 21/0300 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER DURING THE EARLY MORNING VIS POOR TO MODERATE
MAR DE LA FLOTA COASTS W OF 60W: SW 5/6 WITH GUSTS VEER SECTOR W 6 WITH GUSTS BY 21/0300 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER DURING THE EVENING VIS POOR TO MODERATE OCNL GOOD
MAR DE LA FLOTA COASTS REST OF THE AREA: NE 4/5 WITH GUSTS BACK NW 5/7 WITH GUSTS BY 21/0000 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER TOWARDS NIGTH VIS POOR TO MODERATE
GERLACHE STRAIT : SECTOR S 3/4 VEER SW 5/6 BY 21/0300 PROB OF MIST PROB OFISOL SNOW FALL WORSENING DURING THE EARLY MORNING VIS MODERATE TO POOR
MARGARITA BAY : SECTOR N 4/3 BACK NW 4/4 BY 21/0300 PROB OF MIST PROB OFISOL SNOW FALL WORSENING TOWARDS NIGTH VIS GOOD TO MODERATE
EREBUS Y TERROR GULF : SW 7 WITH GUSTS BACK SECTOR S 4 BY 21/0000 PROB OF MIST PROB OFCOASTAL BLIZZARD IMPR TOWARDS NIGTH VIS MODERATE TO GOOD
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 20/1800 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER STARTING NOON VIS POOR TO MODERATE
SOUTHERN BELLINGSHAUSEN SEA (66-73S 70-90W): NW 4/5 BACK SECTOR W 7 WITH GUSTS BY 20/2100 PROB OF FOG AND MIST IN PATCHES PROB OFISOL SNOW FALL IMPR TOWARDS NIGTH VIS VERY POOR TO MODERATE OCNL GOOD
NORTHERN WEDDELL SEA N OF 64S: SE 6/7 WITH GUSTS VEER SECTOR S 5 BY 21/0300 PROB OF FOG AND MIST IN PATCHES PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER DURING THE EARLY MORNING VIS VERY POOR TO MODERATE
NORTHERN WEDDELL SEA REST OF THE AREA: SE 4/5 VEER SECTOR S 4 BY 21/0300 PROB OF FOG AND MIST IN PATCHES WORSENING TOWARDS NIGTH VIS MODERATE TO VERY POOR
SOUTHERN WEDDELL SEA (68-78S 20-60W): SE 5/4 WITH GUSTS BACK SECTOR E 4 BY 21/0300 PROB OF MIST VIS MODERATE TO GOOD=