1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
2026-08-18, 00:00 UTC.
NATIONAL WEATHER SERVICE
SEA ICE AND ICEBERGS ISSUED BY SHN
PRESSURE HPA
BEAUFORT SCALE WINDS.
PART 1 GALE WARNING:
WARNING 383: STRONG BARIC GRADIENT WILL PROVOKE WINDS FORCE 8 FROM SECTOR W WITH
GUST IN FIN DEL MUNDO COASTS SOUTH PATAGONIA COASTS SOUTHERN OF 50 FROM
18/1800
WARNING 382: STRONG BARIC GRADIENT PROVOKES WINDS FORCE 8 FROM NW WITH GUST
BETWEEN 35S-43S 30W-45W
WARNING 379: STRONG BARIC GRADIENT PROVOKES WINDS FORCE 8 FROM NW WITH GUST IN
DRAKE AREA (55S- 60S AND 60W- 67W) UNTIL 18/1500
PART 2 GENERAL SYNOPSIS AT 21:00UTC
171400 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 6148S 05427W 21X12NM
A81 5901S 05108W 28X25NM A76C 5247S 03022W 16X6NM A83 6108S 05033W 12X7NM
3.ICEBERGS SMALLER THAN 10NM D33C 6116S 05212W 9X5NM ICEBERG1 6027S 05119W 5X3NM
ICEBERG2 6119S 05400W 5X3NM ICEBERG3 6124S 05331W 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
LOW 1002HPA 47S 47W NC EXP 46S 27W BY 18/2100 EXTENDS CFNT AT 47S 44W 38S 45W
32S 55W MOV E
STATIONARY FRONT 32S 55W 26S 59W
HIGH 1025HPA 39S 65W MOV E
PART 3 FORECAST ISSUED 00:00 UTC VALID UNTIL 00:00 UTC 2026-08-19
COASTAL AREAS:
INNER RIO DE LA PLATA: SE 5 WITH GUSTS UNSTABLE PROB OFISOL DRIZZLE VIS
MODERATE
OUTER RIO DE LA PLATA: SE 5/6 WITH GUSTS UNSTABLE PROB OFISOL DRIZZLE VIS
MODERATE
URUGUAY SOUTH EAST COASTS: SE 5/5 WITH GUSTS PROB OF ISOL RAIN STORMS IMPR
STARTING NIGTH VIS MODERATE
MAR DEL PLATA COASTS(3617S - 3830S): SECTOR S 4/5 VIS MODERATE TO GOOD
RINCON BAHIA BLANCA COASTS(3830S - 41S): VRB 4 VEER SECTOR W 4/5 BY 18/0900
VEER NW 4/5 BY 18/1800 VIS GOOD
PENINSULA DE VALDES COASTS(41S - 45S): NW 4/5 INCR 4/6 WITH GUSTS BY 18/1800
UNSTABLE DURING THE EARLY MORNING NEXT IMPR VIS MODERATE
GOLFO DE SAN JORGE COASTS(45S - 48S): NW 5/6 WITH GUSTS BACK W 4/5 BY 18/2100
VIS MODERATE TO GOOD
SOUTH PATAGONIA COASTS(48S - 54S) N OF 50S: NW 6/6 WITH GUSTS BACK SECTOR W 5
WITH GUSTS BY 18/1500 UNSTABLE STARTING EVENING VIS MODERATE OCNL POOR
SOUTH PATAGONIA COASTS(48S - 54S) REST OF THE AREA: NW 6/7 WITH GUSTS BACK
SECTOR W 7/8 WITH GUSTS BY 18/1800 PROB OF SH VIS MODERATE TO POOR
FIN DEL MUNDO COASTS(54S - 55S): NW 7/6 GUST WITH 8 INTENSITY BACK SECTOR W
7/8 WITH GUSTS BY 18/1800 PROB OF RAIN AND SNOW MIXTURE VIS MODERATE TO POOR
ISLAS MALVINAS COASTS: NW 7/6 WITH GUSTS BACK SECTOR W 7/6 WITH GUSTS BY 18/2100
PROB OF SH TOWARDS NIGTH VIS MODERATE TO POOR
OCEANIC AREAS:
NORTH AREA (35S- 40S AND 20W- 55W) E OF 30W: SECTOR W 5 VEER NW 7/8 WITH GUSTS
BY 18/1200 PROB OF RAIN VIS MODERATE TO POOR
E OF 45W: NW 7/8 WITH GUSTS BACK SW 5/4 BY 18/1500 PROB OF RAIN VIS POOR TO
MODERATE
REST OF THE AREA: SECTOR S 5 WITH GUSTS PROB OF ISOL RAIN VIS MODERATE
CENTRAL EAST AREA (40S- 50S AND 20W- 40W) W OF 30 - N OF 45S: SECTOR W 5/6 WITH
GUSTS VEER NW 7/8 WITH GUSTS BY 18/0900 PROB OF RAIN VIS MODERATE TO POOR
W OF 30 - N OF 45S: NW 7/8 WITH GUSTS BACK SECTOR W 5 BY 18/1200 PROB OF RAIN
NXT SH TOWARDS EVENING VIS POOR TO MODERATE
REST OF THE AREA: SECTOR E 5 WITH GUSTS VEER SECTOR S 5 WITH GUSTS BY 18/1800
PROB OF RAIN VIS MODERATE
CENTRAL WEST AREA (40S- 50S AND 40W- 60W) N OF 45S: SECTOR W 7/5 WITH GUSTS DECR
5 BY 18/1500 AFTERWARDS NW 5 WITH GUSTS BY 18/2200 PROB OF ISOL RAIN VIS
MODERATE OCNL POOR
E OF 50 - S OF 45S: SECTOR S 5/4 PROB OF ISOL RAIN VIS MODERATE
REST OF THE AREA: SW 5 VEER NW 6/7 WITH GUSTS BY 18/1200 PROB OF ISOL RAIN VIS
MODERATE OCNL POOR
SOUTH EAST AREA (50S- 60S AND 20W- 40W) N OF 55S: SECTOR W 4/5 WITH GUSTS
UNSTABLE TOWARDS NIGTH VIS MODERATE TO GOOD
REST OF THE AREA: SECTOR W 7/6 GUST WITH 8 INTENSITY DECR 5/4 BY 18/1500 PROB
OF RAIN VIS MODERATE OCNL POOR
SOUTH WEST AREA (50S- 60S AND 40W- 60W) N OF 55S: NW 4/5 INCR 5/7 WITH GUSTS BY
18/1200 PROB OF RAIN STARTING EVENING VIS MODERATE OCNL POOR
REST OF THE AREA: NW 7/5 WITH GUSTS PROB OF RAIN NXT RAIN AND SNOW MIXTURE
TOWARDS NIGTH VIS POOR TO MODERATE
DRAKE AREA (55S- 60S AND 60W- 67W): NW 8/7 WITH GUSTS BACK SECTOR W 7 GUST WITH
8 INTENSITY BY 18/1500 PROB OF RAIN NXT RAIN AND SNOW MIXTURE VIS POOR OCNL
MODERATE
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1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
00:00 UTC 18, AUGUST 2026.
NATIONAL WEATHER SERVICE (NWS)
SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS
PART 1 GALE WARNING:
1069/2026 STRONG BARIC GRADIENT NORTHERN WEDDELL SEA MOV E DEEPENING PROVOKES WINDS FORCE 8 WITH GUST IN 60S-65S 40W-30W UNTIL 18/0300
1070/2026 STRONG BARIC GRADIENT SOUTHERN PORTION OF DRAKE STRAIT MAR DE LA FLOTA COASTS MOV E DEEPENING PROVOKES WINDS FORCE 8 FROM SECTOR E WITH GUST IN 61S-64S 70W-58W UNTIL 19/1800
1071/2026 STRONG BARIC GRADIENT GERLACHE STRAIT MOV E DEEPENING WILL PROVOKE WINDS FORCE 8 FROM SECTOR E WITH GUST IN 64S-66S 70W-64W FROM 18/1200 UNTIL 19/0300
1072/2026 STRONG BARIC GRADIENT EREBUS Y TERROR GULF MOV E DEEPENING PROVOKES WINDS FORCE 8 FROM SW WITH GUST IN 64S-66S 59W-50W UNTIL 18/2100
1073/2026 STRONG BARIC GRADIENT NORTHERN WEDDELL SEA MOV E DEEPENING WILL PROVOKE WINDS FORCE 8 FROM SECTOR E WITH GUST IN 61S-66S 50W-40W FROM 18/1500 UNTIL 19/2100
PART 2 GENERAL SYNOPSIS AT 21:00UTC
LOW 972HPA 65S 38W MOV SE DPN EXTENDS CFNT AT 65S 38W 63S 35W 60S 48W MOV E
LOW 973HPA 63S 78W MOV E DPN
HIGH 1000HPA 68S 57W MOV NE INTSF
171400 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 6148S 05427W 21X12NM A81 5901S 05108W 28X25NM A76C 5247S 03022W 16X6NM A83 6108S 05033W 12X7NM 3.ICEBERGS SMALLER THAN 10NM D33C 6116S 05212W 9X5NM ICEBERG1 6027S 05119W 5X3NM ICEBERG2 6119S 05400W 5X3NM ICEBERG3 6124S 05331W 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 2026-08-19
COASTAL AREAS:
SOUTHERN PORTION OF DRAKE STRAIT W OF 60W: NE 5/7 GUST WITH 8 INTENSITY VEER SECTOR E 9 WITH GUSTS BY 18/0900 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: SE 7/8 WITH GUSTS BACK SECTOR E 9 WITH GUSTS BY 18/1200 PROB OF FOG AND MIST IN PATCHES PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER DURING THE EVENING VIS VERY POOR TO MODERATE
MAR DE LA FLOTA COASTS W OF 60W: NE 5/7 GUST WITH 8 INTENSITY VEER SECTOR E 9 WITH GUSTS BY 18/0900 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: SE 7/8 WITH GUSTS BACK SECTOR E 9 WITH GUSTS BY 18/1200 PROB OF FOG AND MIST IN PATCHES PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER DURING THE EVENING VIS VERY POOR TO MODERATE
GERLACHE STRAIT : NE 7 WITH GUSTS VEER SECTOR E 8 WITH GUSTS BY 18/1500 PROB OF MIST PROB OFISOL SNOW FALL SPELLS OF GOOD WEATHER DURING THE NIGTH VIS MODERATE TO GOOD
MARGARITA BAY : NE 5/6 VEER SECTOR E 7 GUST WITH 8 INTENSITY BY 18/1800 PROB OF MIST VIS MODERATE TO GOOD
EREBUS Y TERROR GULF : SECTOR S 7 WITH GUSTS BACK SECTOR E 5/6 WITH GUSTS BY 18/1200 PROB OF FOG AND MIST IN PATCHES BLIZZARD PROB OFISOL SNOW FALL SPELLS OF GOOD WEATHER DURING THE EARLY MORNING VIS VERY POOR TO MODERATE
OCEANIC AREAS:
NORTHER BELLINGSHAUSEN SEA N OF 64S: SECTOR S 6/5 WITH GUSTS VEER SW 6/7 WITH GUSTS BY 18/1200 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER DURING THE EVENING VIS POOR TO MODERATE
NORTHER BELLINGSHAUSEN SEA REST OF THE AREA: SE 5/6 WITH GUSTS VEER SECTOR S 5/4 BY 18/1200 PROB OF MIST PROB OFINTERMITTENT SNOW FALL WORSENING DURING THE MORNING VIS GOOD TO MODERATE OCNL POOR
SOUTHERN BELLINGSHAUSEN SEA (66-73S 70-90W): SE 4/3 BACK SECTOR E 3/4 BY 18/1200 PROB OF FOG AND MIST IN PATCHES PROB OFISOL SNOW FALL WORSENING DURING THE MORNING VIS GOOD TO MODERATE OCNL VERY POOR
NORTHERN WEDDELL SEA N OF 64S: NW 8/7 WITH GUSTS BACK SECTOR S 6/5 WITH GUSTS BY 18/0600 PROB OF FOG AND MIST IN PATCHES PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER DURING THE EARLY MORNING VIS VERY POOR TO MODERATE OCNL GOOD
NORTHERN WEDDELL SEA REST OF THE AREA: SECTOR S 5/7 WITH GUSTS BACK SE 6/5 BY 18/1500 PROB OF MIST PROB OFINTERMITTENT SNOW FALL IMPR DURING THE MORNING VIS MODERATE TO GOOD
SOUTHERN WEDDELL SEA (68-78S 20-60W): SECTOR E 4/5 WITH GUSTS VEER SE 5/6 BY 18/2100 PROB OF MIST VIS MODERATE TO GOOD=