1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
00:00 UTC 21, AUGUST 2026.
NATIONAL WEATHER SERVICE (NWS)
SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS
PART 1 GALE WARNING:
1094/2026 STRONG BARIC GRADIENT SOUTHERN PORTION OF DRAKE STRAIT MAR DE LA FLOTA COASTS MOV NE DEEPENING WILL PROVOKE WINDS FORCE 8 FROM SW WITH GUST IN 60S-64S 70W-60W FROM 21/0600 UNTIL 21/2100
1095/2026 STRONG BARIC GRADIENT GERLACHE STRAIT MARGARITA BAY MOV NE DEEPENING WILL PROVOKE WINDS FORCE 8 FROM SW WITH GUST IN 64S-70S 70W-65W FROM 21/0300 UNTIL 20/2100
1096/2026 STRONG BARIC GRADIENT NORTHER BELLINGSHAUSEN SEA MOV NE DEEPENING PROVOKES WINDS FORCE 8 FROM SW WITH GUST IN 63S-70S 80W-70W UNTIL 21/1200
PART 2 GENERAL SYNOPSIS AT 21:00UTC
LOW 972HPA 60S 35W MOV E DPN
LOW 992HPA 62S 60W MOV E WKN
LOW 991HPA 72S 58W MOV E WKN
HIGH 997HPA 69S 31W MOV E WKN
RIDGE 60S 85W 65S 85W 70S 82W MOV E INTSF
201400 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 5957S 05102W 21X12NM A81 5848S 05055W 28X25NM A76C 5304S 03012W 16X6NM 3.ICEBERGS SMALLER THAN 10NM D33C 6158S 05429W 9X5NM ICEBERG1 6008S 04940W 5X3NM ICEBERG2 6103S 05400W 5X3NM ICEBERG3 6125S 05346W 6X4NM ICEBERG4 6123S 05411W 2X1NM ICEBERG5 6107S 05414W 3X1NM 4.ICEBERGS AREA A5602S 02000W 4600S 02000W 5000S 03000W 5300S 03000W B5300S 03000W 5055S 03003W 5400S 04504W 5900S 04500W C5900S 04500W 5400S 04504W 5900S 05500W 6100S 05500W D6100S 05500W 5900S 05500W 6100S 06716W 6200S 06716W
PART 3 FORECAST ISSUED 00:00 UTC VALID UNTIL 00:00 UTC 2026-08-22
COASTAL AREAS:
SOUTHERN PORTION OF DRAKE STRAIT W OF 60W: SW 5/6 WITH GUSTS INCR SW 8 WITH GUSTS BY 21/0600 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER TOWARDS THE END OF THE PERIOD VIS POOR TO MODERATE OCNL GOOD
SOUTHERN PORTION OF DRAKE STRAIT REST OF THE AREA: SECTOR S 5/6 WITH GUSTS VEER SW 7/8 WITH GUSTS BY 21/1200 PROB OF MIST PROB OFINTERMITTENT SNOW FALL WORSENING DURING THE EARLY MORNING VIS MODERATE TO VERY POOR
MAR DE LA FLOTA COASTS W OF 60W: SW 5/6 WITH GUSTS INCR SW 8 WITH GUSTS BY 21/0600 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER TOWARDS THE END OF THE PERIOD VIS POOR TO MODERATE OCNL GOOD
MAR DE LA FLOTA COASTS REST OF THE AREA: SECTOR S 5/6 WITH GUSTS VEER SW 7/8 WITH GUSTS BY 21/1200 PROB OF MIST PROB OFINTERMITTENT SNOW FALL WORSENING DURING THE EARLY MORNING VIS MODERATE TO VERY POOR
GERLACHE STRAIT : SECTOR E 3/4 BACK SW 7/8 BY 21/0900 PROB OF MIST PROB OFISOL SNOW FALL WORSENING DURING THE EARLY MORNING VIS MODERATE TO VERY POOR
MARGARITA BAY : SECTOR N 4/3 BACK SW 7 GUST WITH 8 INTENSITY BY 21/0600 PROB OF MIST PROB OFISOL SNOW FALL WORSENING TOWARDS THE END OF THE PERIOD VIS GOOD TO MODERATE OCNL POOR
EREBUS Y TERROR GULF : NE 3/4 BACK SW 7/8 BY 21/1500 PROB OF MIST BLIZZARD PROB OFISOL SNOW FALL WORSENING DURING THE MORNING VIS MODERATE TO VERY POOR
OCEANIC AREAS:
NORTHER BELLINGSHAUSEN SEA N OF 64S: SECTOR W 6/5 WITH GUSTS BACK SW 7 WITH GUSTS BY 21/0900 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 7/8 WITH GUSTS VEER SECTOR W 5/7 WITH GUSTS BY 21/1200 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER STARTING EARLY MORNING VIS POOR TO MODERATE OCNL GOOD
SOUTHERN BELLINGSHAUSEN SEA (66-73S 70-90W): SW 7 GUST WITH 8 INTENSITY VEER SECTOR N 5 WITH GUSTS BY 21/1200 PROB OF FOG AND MIST IN PATCHES PROB OFISOL SNOW FALL WORSENING TOWARDS MORNING VIS GOOD TO MODERATE OCNL VERY POOR
NORTHERN WEDDELL SEA N OF 64S: SECTOR S 5/4 BACK SE 5/6 BY 21/1500 PROB OF FOG AND MIST IN PATCHES PROB OFINTERMITTENT SNOW FALL IMPR STARTING EARLY MORNING VIS VERY POOR TO MODERATE OCNL GOOD
NORTHERN WEDDELL SEA REST OF THE AREA: SE 3/4 VEER SECTOR S 4/5 BY 21/1500 PROB OF FOG AND MIST IN PATCHES IMPR TOWARDS MORNING VIS VERY POOR TO MODERATE OCNL GOOD
SOUTHERN WEDDELL SEA (68-78S 20-60W): SECTOR E 3/4 VEER SE 4 BY 21/1500 PROB OF MIST VIS MODERATE TO GOOD=
1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
2026-08-21, 00:00 UTC.
NATIONAL WEATHER SERVICE
SEA ICE AND ICEBERGS ISSUED BY SHN
PRESSURE HPA
BEAUFORT SCALE WINDS.
PART 1 GALE WARNING:
WARNING 388: STRONG BARIC GRADIENT ON MOV E WILL PROVOKE WINDS FORCE 8 WITH GUST
BETWEEN 40S-45S 20W-30W FROM 21/1200
WARNING 387: STRONG BARIC GRADIENT ON MOV E WILL PROVOKE WINDS FORCE 8 WITH GUST
IN NORTH AREA (35S- 40S AND 20W- 55W) EASTHERN OF 35 FROM 21/1200
WARNING 386: COLD FRONT AT MOV E WILL PROVOKE WINDS FORCE 8 FROM SECTOR W WITH
GUST IN CENTRAL EAST AREA (40S- 50S AND 20W- 40W) SOUTHERN OF 45 FROM 21/0900
WARNING 385: STRONG BARIC GRADIENT ON MOV NE WILL PROVOKE WINDS FORCE 8 FROM SW
WITH GUST IN FIN DEL MUNDO COASTS ISLAS MALVINAS COASTS DRAKE AREA (55S- 60S AND
60W- 67W) BETWEEN 45S-60S AND 50W-60W FROM 21/0900
PART 2 GENERAL SYNOPSIS AT 21:00UTC
201400 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 5957S 05102W 21X12NM
A81 5848S 05055W 28X25NM A76C 5304S 03012W 16X6NM 3.ICEBERGS SMALLER THAN 10NM
D33C 6158S 05429W 9X5NM ICEBERG1 6008S 04940W 5X3NM ICEBERG2 6103S 05400W 5X3NM
ICEBERG3 6125S 05346W 6X4NM ICEBERG4 6123S 05411W 2X1NM ICEBERG5 6107S 05414W
3X1NM 4.ICEBERGS AREA A5602S 02000W 4600S 02000W 5000S 03000W 5300S 03000W
B5300S 03000W 5055S 03003W 5400S 04504W 5900S 04500W C5900S 04500W 5400S 04504W
5900S 05500W 6100S 05500W D6100S 05500W 5900S 05500W 6100S 06716W 6200S 06716W
STRONG BARIC GRADIENT PENINSULA DE VALDES COASTS GOLFO DE SAN JORGE COASTS SOUTH
PATAGONIA COASTS FIN DEL MUNDO COASTS ISLAS MALVINAS COASTS CENTRAL WEST AREA
(40S- 50S AND 40W- 60W) SOUTH WEST AREA (50S- 60S AND 40W- 60W) DRAKE AREA (55S-
60S AND 60W- 67W)
LOW 989HPA 47S 44W MOV E DPN EXTENDS CFNT AT 36S 60W 40S 50W 46S 44W MOV NE
LOW 1003HPA 35S 51W MOV SE DPN ASOCIATED WITH OFNT AT 35S 48W 35S 53W 32S 52W
LOW 967HPA 58S 30W ASOCIATED WITH OFNT AT 63S 30W 60S 42W 55S 30W
PART 3 FORECAST ISSUED 00:00 UTC VALID UNTIL 00:00 UTC 2026-08-22
COASTAL AREAS:
INNER RIO DE LA PLATA: SW 4 BACK S 5/6 WITH GUSTS BY 21/0300 DECR 5 WITH GUSTS
VIS GOOD
OUTER RIO DE LA PLATA: SECTOR S 6/5 WITH GUSTS UNSTABLE STARTING EVENING VIS
GOOD
URUGUAY SOUTH EAST COASTS: SW 4/6 WITH GUSTS BACK S 7/6 WITH GUSTS BY 21/0300
PROB OF SH STARTING EVENING VIS GOOD OCNL MODERATE
MAR DEL PLATA COASTS(3617S - 3830S): S 7/6 WITH GUSTS VEER SW 6 WITH GUSTS
PROB OF SH STARTING EARLY MORNING VIS GOOD OCNL MODERATE
RINCON BAHIA BLANCA COASTS(3830S - 41S): S 6 WITH GUSTS VEER SW WITH GUSTS
PROB OF SH STARTING EARLY MORNING VIS MODERATE OCNL GOOD
PENINSULA DE VALDES COASTS(41S - 45S): SW 6 WITH GUSTS PROB OF ISOL SH VIS
MODERATE OCNL GOOD
GOLFO DE SAN JORGE COASTS(45S - 48S): SW 7/6 WITH GUSTS UNSTABLE VIS GOOD
SOUTH PATAGONIA COASTS(48S - 54S): SW 7 WITH GUSTS PROB OF SH VIS MODERATE
OCNL GOOD
FIN DEL MUNDO COASTS(54S - 55S): SW 7/8 WITH GUSTS PROB OF RAIN VIS MODERATE
TO POOR
ISLAS MALVINAS COASTS: SW 6/8 WITH GUSTS PROB OF RAIN VIS MODERATE TO POOR
OCEANIC AREAS:
NORTH AREA (35S- 40S AND 20W- 55W) E OF 35W: W 5 VEER NW 7/8 WITH GUSTS
WORSENING WITH PROB OF RAIN VIS GOOD TO POOR
W OF 45W: NW 5 BACK SW 7 WITH GUSTS PROB OF SH RAIN VIS MODERATE OCNL POOR
REST OF THE AREA: NW 5 WITH GUSTS VEER VRB 6/7 WITH GUSTS BACK SW 6 WITH GUSTS
PROB OF HVY RAIN NEXT SH VIS POOR OCNL VERY POOR
CENTRAL EAST AREA (40S- 50S AND 20W- 40W) E OF 30 - N OF 45S: W 5 VEER NW 7/8
WITH GUSTS WORSENING WITH PROB OF HVY RAIN VIS MODERATE TO POOR OCNL VERY POOR
W OF 30 - N OF 45S: NW 6/7 WITH GUSTS BACK SW 6 WITH GUSTS PROB OF SH RAIN VIS
MODERATE OCNL POOR
E OF 30 - S OF 45S: NW 6/7 WITH GUSTS BACK W 8 WITH GUSTS PROB OF SH RAIN VIS
MODERATE OCNL POOR
REST OF THE AREA: NW 5 WITH GUSTS VEER VRB 7 WITH GUSTS BACK W 8/7 WITH GUSTS
PROB OF SH RAIN VIS POOR OCNL MODERATE
CENTRAL WEST AREA (40S- 50S AND 40W- 60W) W OF 50 - S OF 45S: SW 7/8 WITH GUSTS
PROB OF SH RAIN VIS MODERATE OCNL POOR
E OF 50 - S OF 45S: SW 7/6 WITH GUSTS PROB OF SH RAIN VIS MODERATE OCNL POOR
W OF 50 - N OF 45S: SW 6/7 WITH GUSTS PROB OF SH RAIN VIS MODERATE OCNL POOR
REST OF THE AREA: NW 6/7 WITH GUSTS BACK SW 6/7 WITH GUSTS PROB OF SH RAIN VIS
MODERATE OCNL POOR
SOUTH EAST AREA (50S- 60S AND 20W- 40W) E OF 30 - S OF 55S: NW 5 VEER VRB 4 PROB
OF ISOL SNOW FALL VIS MODERATE OCNL GOOD
W OF 30 - S OF 55S: W 5 WITH GUSTS BACK SECTOR S WITH GUSTS PROB OF ISOL SNOW
FALL VIS MODERATE OCNL GOOD
REST OF THE AREA: SECTOR W 7/6 WITH GUSTS PROB OF ISOL RAIN SNOW FALL VIS
MODERATE OCNL POOR
SOUTH WEST AREA (50S- 60S AND 40W- 60W) S OF 55 - E OF 50W: SW 7 WITH GUSTS BACK
SE 6 WITH GUSTS PROB OF ISOL SNOW FALL VIS MODERATE OCNL GOOD
N OF 55 - E OF 50W: SW 6 WITH GUSTS DECR PROB OF ISOL RAIN SNOW FALL VIS
MODERATE OCNL POOR
REST OF THE AREA: SW 7/8 WITH GUSTS PROB OF RAIN SNOW FALL VIS MODERATE TO POOR
OCNL VERY POOR
DRAKE AREA (55S- 60S AND 60W- 67W): SW 7/8 WITH GUSTS PROB OF ISOL RAIN VIS
MODERATE TO POOR OCNL VERY POOR
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