1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
2026-08-17, 00:00 UTC.
NATIONAL WEATHER SERVICE
SEA ICE AND ICEBERGS ISSUED BY SHN
PRESSURE HPA
BEAUFORT SCALE WINDS.
PART 1 GALE WARNING:
WARNING 381: STRONG BARIC GRADIENT WILL PROVOKE WINDS FORCE 8 FROM SECTOR N WITH
GUST BETWEEN 35S-45S 30W-50W FROM 17/0300
WARNING 379: STRONG BARIC GRADIENT PROVOKES WINDS FORCE 8 WITH GUST IN DRAKE
AREA (55S- 60S AND 60W- 67W)
PART 2 GENERAL SYNOPSIS AT 21:00UTC
LOW 1005HPA 45S 54W DPN EXP 46S 47W BY 17/2100
HIGH 1033HPA 35S 35W MOV NE WKN EXP BY 17/2100 EXTENDS RIDGE41S 37W 44S 40W 47S
44W MOV NE
161400 UTC 1.SEA ICE LIMIT 5448S 02000W 6458S 06350W 6453S 06351W 6403S 06137W
6116S 05515W 6213S 05906W 6228S 06019W 6455S 06324W 6348S 06140W 6210S 05834W
6240S 06055W 6220S 06716W 2.ICEBERGS GREATER THAN 10NM D33B 6022S 05218W 21X12NM
A81 5904S 05105W 28X25NM A76C 5250S 03026W 16X6NM A83 6108S 05033W 12X7NM
3.ICEBERGS SMALLER THAN 10NM D33C 6140S 05419W 9X5NM ICEBERG1 6027S 05119W 5X3NM
ICEBERG2 6123S 05356W 5X3NM ICEBERG3 6121S 05301W 6X4NM 4.ICEBERGS AREA A5804S
02000W 4557S 02000W 5000S 03000W 5427S 02951W B5427S 02951W 5100S 03000W 5402S
04500W 5914S 04504W C5914S 04504W 5400S 04500W 5900S 05501W 6145S 05500W D6145S
05500W 6001S 05506W 6000S 06716W 6240S 06716W
PART 3 FORECAST ISSUED 00:00 UTC VALID UNTIL 00:00 UTC 2026-08-18
COASTAL AREAS:
INNER RIO DE LA PLATA: SE 4/5 WITH GUSTS PROB OF DRIZZLE RAIN STARTING EVENING
VIS GOOD TO MODERATE
OUTER RIO DE LA PLATA: SE 4/5 WITH GUSTS PROB OF DRIZZLE RAIN STARTING EVENING
VIS GOOD TO MODERATE OCNL POOR
URUGUAY SOUTH EAST COASTS: SECTOR S 4/5 WITH GUSTS PROB OF HVY RAIN ISOL STORMS
VIS MODERATE TO POOR
MAR DEL PLATA COASTS(3617S - 3830S): SECTOR S 4/5 WITH GUSTS PROB OF ISOL
DRIZZLE VIS MODERATE
RINCON BAHIA BLANCA COASTS(3830S - 41S): SW 5/4 PROB OF ISOL DRIZZLE TOWARDS
EVENING IMPR VIS MODERATE
PENINSULA DE VALDES COASTS(41S - 45S): SW 5/4 PROB OF ISOL DRIZZLE TOWARDS THE
END OF THE PERIOD IMPR VIS MODERATE
GOLFO DE SAN JORGE COASTS(45S - 48S): SW 5 VEER NW 4 BY 17/1800 PROB OF SH
TOWARDS EVENING IMPR VIS MODERATE
SOUTH PATAGONIA COASTS(48S - 54S): SECTOR S 4 VEER NW 5 BY 17/1200 VIS GOOD
FIN DEL MUNDO COASTS(54S - 55S): NW 6/7 GUST WITH 8 INTENSITY PROB OF ISOL
RAIN STARTING EVENING VIS MODERATE TO POOR
ISLAS MALVINAS COASTS: SE 3 VEER NW 5/6 BY 17/1500 UNSTABLE VIS MODERATE
OCEANIC AREAS:
NORTH AREA (35S- 40S AND 20W- 55W) E OF 30W: SW 5 WITH GUSTS PROB OF DRIZZLE VIS
MODERATE OCNL POOR
W OF 30 - E OF 50W: SECTOR N 7/8 WITH GUSTS PROB OF HVY RAIN VIS POOR
REST OF THE AREA: SECTOR S 4/5 RAIN STARTING EVENING IMPR VIS MODERATE
CENTRAL EAST AREA (40S- 50S AND 20W- 40W) E OF 30W: SECTOR W 5/6 WITH GUSTS PROB
OF SH RAIN VIS POOR
W OF 30 - N OF 45S: SECTOR W 5 WITH GUSTS VEER SECTOR N 7/8 WITH GUSTS BY
17/1200 PROB OF RAIN VIS MODERATE TO VERY POOR
REST OF THE AREA: SECTOR W 6/5 WITH GUSTS VEER NE 4 WITH GUSTS BY 17/2100 PROB
OF DRIZZLE VIS MODERATE OCNL POOR
CENTRAL WEST AREA (40S- 50S AND 40W- 60W) E OF 50 - N OF 45S: SECTOR N 7/8 WITH
GUSTS BACK SECTOR W 5 WITH GUSTS BY 17/1800 PROB OF ISOL RAIN STORMS VIS VERY
POOR TO MODERATE
E OF 50 - S OF 45S: NE 5/6 VEER E 5 BY 17/1800 PROB OF RAIN VIS POOR
W OF 50 - N OF 45S: SW 6/10 GUST WITH 8 INTENSITY PROB OF SH RAIN VIS MODERATE
TO POOR
REST OF THE AREA: SW 5/4 WITH GUSTS PROB OF SH RAIN VIS MODERATE
SOUTH EAST AREA (50S- 60S AND 20W- 40W) E OF 30W: SECTOR W 5 WITH GUSTS PROB OF
ISOL SNOW FALL VIS MODERATE
W OF 30 - REST OF THE AREA OF 55S REST OF THE AREA: SECTOR W 6/5 WITH GUSTS
PROB OF ISOL SNOW FALL VIS MODERATE
REST OF THE AREA: SECTOR W 6/7 GUST WITH 8 INTENSITY PROB OF SNOW FALL VIS
MODERATE TO POOR
SOUTH WEST AREA (50S- 60S AND 40W- 60W) N OF 55S: VRB 3 PROB OF DRIZZLE TOWARDS
EVENING IMPR VIS MODERATE TO GOOD
REST OF THE AREA: NW 6/10 GUST WITH 8 INTENSITY PROB OF RAIN SNOW FALL VIS
MODERATE TO POOR
DRAKE AREA (55S- 60S AND 60W- 67W): NE 7/8 WITH GUSTS PROB OF RAIN VIS POOR OCNL
VERY POOR
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1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
00:00 UTC 17, AUGUST 2026.
NATIONAL WEATHER SERVICE (NWS)
SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS
PART 1 GALE WARNING:
1059/2026 STRONG BARIC GRADIENT NORTHERN WEDDELL SEA MOV E DEEPENING PROVOKES WINDS FORCE 8 WITH GUST IN 60S-65S 50W-30W UNTIL 18/0300
1060/2026 STRONG BARIC GRADIENT SOUTHERN PORTION OF DRAKE STRAIT MAR DE LA FLOTA COASTS MOV E DEEPENING PROVOKES WINDS FORCE 8 WITH GUST IN 60S-64S 60W-50W UNTIL 17/1500
1061/2026 STRONG BARIC GRADIENT SOUTHERN PORTION OF DRAKE STRAIT MAR DE LA FLOTA COASTS MOV E DEEPENING WILL PROVOKE WINDS FORCE 8 FROM SECTOR E WITH GUST IN 61S-64S 70W-58W FROM 17/2100 UNTIL 18/2100
1062/2026 STRONG BARIC GRADIENT GERLACHE STRAIT MOV E DEEPENING WILL PROVOKE WINDS FORCE 8 FROM SECTOR E WITH GUST IN 64S-66S 70W-64W FROM 17/0300 UNTIL 18/1200
1063/2026 STRONG BARIC GRADIENT EREBUS Y TERROR GULF MOV E DEEPENING WILL PROVOKE WINDS FORCE 8 FROM SW WITH GUST IN 64S-66S 59W-50W FROM 17/0900 UNTIL 17/2100
PART 2 GENERAL SYNOPSIS AT 21:00UTC
LOW 971HPA 65S 72W MOV SE DPN EXTENDS CFNT AT 65S 72W 63S 68W 60S 69W MOV E
LOW 968HPA 63S 85W MOV E WKN
LOW 987HPA 68S 53W MOV E DPN
LOW 991HPA 63S 43W MOV E WKN
161400 UTC 1.SEA ICE LIMIT 5448S 02000W 6458S 06350W 6453S 06351W 6403S 06137W 6116S 05515W 6213S 05906W 6228S 06019W 6455S 06324W 6348S 06140W 6210S 05834W 6240S 06055W 6220S 06716W 2.ICEBERGS GREATER THAN 10NM D33B 6022S 05218W 21X12NM A81 5904S 05105W 28X25NM A76C 5250S 03026W 16X6NM A83 6108S 05033W 12X7NM 3.ICEBERGS SMALLER THAN 10NM D33C 6140S 05419W 9X5NM ICEBERG1 6027S 05119W 5X3NM ICEBERG2 6123S 05356W 5X3NM ICEBERG3 6121S 05301W 6X4NM 4.ICEBERGS AREA A5804S 02000W 4557S 02000W 5000S 03000W 5427S 02951W B5427S 02951W 5100S 03000W 5402S 04500W 5914S 04504W C5914S 04504W 5400S 04500W 5900S 05501W 6145S 05500W D6145S 05500W 6001S 05506W 6000S 06716W 6240S 06716W
PART 3 FORECAST ISSUED 00:00 UTC VALID UNTIL 00:00 UTC 2026-08-18
COASTAL AREAS:
SOUTHERN PORTION OF DRAKE STRAIT W OF 60W: NW 9 WITH GUSTS BACK SECTOR W 7/5 WITH GUSTS BY 17/0900 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
SOUTHERN PORTION OF DRAKE STRAIT REST OF THE AREA: NW 5/7 WITH GUSTS INCR NW 9 WITH GUSTS BY 17/0600 AFTERWARDS SECTOR W 6/5 WITH GUSTS BY 17/1500 PROB OF FOG AND MIST IN PATCHES PROB OFINTERMITTENT SNOW FALL WORSENING DURING THE EARLY MORNING VIS MODERATE TO VERY POOR
MAR DE LA FLOTA COASTS W OF 60W: NW 9 WITH GUSTS BACK SECTOR W 7/5 WITH GUSTS BY 17/0900 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
MAR DE LA FLOTA COASTS REST OF THE AREA: NW 5/7 WITH GUSTS INCR NW 9 WITH GUSTS BY 17/0600 AFTERWARDS SECTOR W 5/5 WITH GUSTS BY 17/1500 PROB OF FOG AND MIST IN PATCHES PROB OFINTERMITTENT SNOW FALL WORSENING DURING THE EARLY MORNING VIS MODERATE TO VERY POOR
GERLACHE STRAIT : SECTOR E 7/8 WITH GUSTS VEER NE 5/7 GUST WITH 8 INTENSITY BY 17/0300 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER TOWARDS THE END OF THE PERIOD VIS POOR TO MODERATE
MARGARITA BAY : NE 4/5 VEER SECTOR E 4/3 BY 17/1200 PROB OF MIST VIS MODERATE TO GOOD
EREBUS Y TERROR GULF : NW 4/5 BACK SW 8 WITH GUSTS BY 17/0900 AFTERWARDS SW 5 BY 17/2100 PROB OF FOG AND MIST IN PATCHES BLIZZARD PROB OFISOL SNOW FALL WORSENING DURING THE EARLY MORNING VIS GOOD TO MODERATE OCNL VERY POOR
OCEANIC AREAS:
NORTHER BELLINGSHAUSEN SEA N OF 64S: NW 7/5 WITH GUSTS BACK SECTOR S 6/5 BY 17/0900 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER TOWARDS THE END OF THE PERIOD VIS POOR TO MODERATE
NORTHER BELLINGSHAUSEN SEA REST OF THE AREA: SE 5/6 VEER SECTOR S 5/4 BY 17/1500 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER DURING THE EVENING VIS POOR TO MODERATE OCNL GOOD
SOUTHERN BELLINGSHAUSEN SEA (66-73S 70-90W): SECTOR S 4/5 VEER SECTOR S 4 BY 17/1500 PROB OF FOG AND MIST IN PATCHES SPELLS OF GOOD WEATHER DURING THE EVENING VIS VERY POOR TO MODERATE OCNL GOOD
NORTHERN WEDDELL SEA N OF 64S: SECTOR W 5/6 WITH GUSTS VEER NW 9 WITH GUSTS BY 17/1200 PROB OF FOG AND MIST IN PATCHES PROB OFINTERMITTENT BLIZZARD SPELLS OF GOOD WEATHER TOWARDS THE END OF THE PERIOD VIS VERY POOR TO MODERATE OCNL GOOD
NORTHERN WEDDELL SEA REST OF THE AREA: SECTOR E 3/4 BACK NE 4/5 BY 17/1200 PROB OF MIST PROB OFINTERMITTENT SNOW FALL WORSENING STARTING EARLY MORNING VIS MODERATE TO POOR
SOUTHERN WEDDELL SEA (68-78S 20-60W): SECTOR N 6/5 WITH GUSTS VEER SECTOR E 5/4 BY 17/1200 PROB OF MIST PROB OFISOL SNOW FALL IMPR DURING THE EARLY MORNING VIS POOR TO MODERATE OCNL GOOD=