1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
00:00 UTC 18, JULY 2026.
NATIONAL WEATHER SERVICE (NWS)
SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS
PART 1 GALE WARNING:
979/2026 STRONG BARIC GRADIENT SOUTHERN PORTION OF DRAKE STRAIT MAR DE LA FLOTA COASTS MOV E DEEPENING PROVOKES WINDS FORCE 8 WITH GUST IN 61S-64S 64W-50W UNTIL 18/2100
980/2026 STRONG BARIC GRADIENT NORTHERN WEDDELL SEA MOV SE DEEPENING PROVOKES WINDS FORCE 8 WITH GUST IN 61S-65S 50W-30W UNTIL 18/2100
PART 2 GENERAL SYNOPSIS AT 21:00UTC
LOW 978HPA 65S 58W MOV E WKN
LOW 984HPA 65S 77W MOV E WKN
LOW 981HPA 66S 40W MOV E WKN
RIDGE 60S 42W 63S 47W 65S 48W MOV E WKN
171400 UTC 1.SEA ICE LIMIT 5753S 02000W 5712S 02618W 5848S 03217W 5925S 03757W 5954S 04317W 6044S 04814W 6151S 05247W 6234S 05655W 6342S 06032W 6413S 06337W 6532S 06559W 6616S 06716W 2.ICEBERGS GREATER THAN 10NM D33B 6147S 05210W 21X12NM A81 6112S 05327W 28X25NM A76C 5219S 03139W 16X6NM D33C 6315S 05259W 9X4NM A83 6238S 05051W 12X7NM D35 6154S 04434W 28X6NM 3.ICEBERGS SMALLER THAN 10NM ICEBERG1 6210S 05251W 6X3NM ICEBERG2 6310S 05233W 5X2NM ICEBERG3 6253S 05303W 4X3NM ICEBERG4 6229S 05252W 2X1NM ICEBERG5 5957S 03541W 4X2NM 4.ICEBERGS AREA A6000S 02000W 4300S 02000W 5300S 03900W 6011S 03900W B6011S 03900W 5500S 03900W 5900S 05000W 6245S 05000W C6245S 05000W 5900S 05000W 6400S 06716W 6700S 06716W
PART 3 FORECAST ISSUED 00:00 UTC VALID UNTIL 00:00 UTC 2026-07-19
COASTAL AREAS:
SOUTHERN PORTION OF DRAKE STRAIT W OF 60W: NW 7 GUST WITH 8 INTENSITY BACK SECTOR W 6/5 WITH GUSTS BY 18/1500 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER TOWARDS THE END OF THE PERIOD VIS POOR TO MODERATE
SOUTHERN PORTION OF DRAKE STRAIT REST OF THE AREA: NW 7/8 WITH GUSTS BACK SECTOR W 7 GUST WITH 8 INTENSITY BY 18/1500 PROB OF MIST PROB OFISOL SNOW FALL WORSENING DURING THE EARLY MORNING VIS MODERATE TO POOR
MAR DE LA FLOTA COASTS W OF 60W: NW 7 GUST WITH 8 INTENSITY BACK SECTOR W 6/5 WITH GUSTS BY 18/1500 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER TOWARDS THE END OF THE PERIOD VIS POOR TO MODERATE
MAR DE LA FLOTA COASTS REST OF THE AREA: NW 7/8 WITH GUSTS BACK SECTOR W 7 GUST WITH 8 INTENSITY BY 18/1500 PROB OF MIST PROB OFISOL SNOW FALL WORSENING DURING THE EARLY MORNING VIS MODERATE TO POOR
GERLACHE STRAIT : SE 4/3 BACK SECTOR S 3 BY 18/1200 PROB OF MIST PROB OFINTERMITTENT SNOW FALL IMPR STARTING NOON VIS POOR TO MODERATE
MARGARITA BAY : NW 3/4 VEER SECTOR N 4/3 BY 18/1200 PROB OF MIST PROB OFISOL SNOW FALL IMPR STARTING EARLY MORNING VIS MODERATE TO GOOD
EREBUS Y TERROR GULF : NW 6/5 BACK SECTOR S 3/4 BY 18/1200 PROB OF FOG AND MIST IN PATCHES WORSENING DURING THE EVENING VIS GOOD TO MODERATE OCNL VERY POOR
OCEANIC AREAS:
NORTHER BELLINGSHAUSEN SEA N OF 64S: NW 5/6 WITH GUSTS BACK SW 5/6 BY 18/1200 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER TOWARDS EVENING VIS POOR TO MODERATE
NORTHER BELLINGSHAUSEN SEA REST OF THE AREA: SW 4/5 BACK SECTOR S 4 BY 18/1500 PROB OF MIST PROB OFISOL SNOW FALL IMPR STARTING EARLY MORNING VIS MODERATE TO GOOD
SOUTHERN BELLINGSHAUSEN SEA (66-73S 70-90W): SW 4/5 BACK SECTOR S 4/3 BY 18/0900 PROB OF MIST PROB OFISOL SNOW FALL IMPR TOWARDS MORNING VIS MODERATE TO GOOD
NORTHERN WEDDELL SEA N OF 65S: NW 7/8 WITH GUSTS BACK SECTOR W 8 WITH GUSTS BY 18/1200 PROB OF MIST PROB OFISOL SNOW FALL IMPR DURING THE EVENING VIS POOR TO MODERATE OCNL GOOD
NORTHERN WEDDELL SEA REST OF THE AREA: SECTOR W 3/4 VEER NE 4/3 WITH GUSTS BY 18/0900 PROB OF FOG AND MIST IN PATCHES WORSENING DURING THE EARLY MORNING VIS MODERATE TO VERY POOR
SOUTHERN WEDDELL SEA (68-78S 20-60W): SECTOR E 4/3 VEER SECTOR S 4/3 BY 18/0900 PROB OF MIST VIS MODERATE TO GOOD=
1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
2026-07-18, 00:00 UTC.
NATIONAL WEATHER SERVICE
SEA ICE AND ICEBERGS ISSUED BY SHN
PRESSURE HPA
BEAUFORT SCALE WINDS.
PART 1 GALE WARNING:
WARNING 332: STRONG BARIC GRADIENT PROVOKES WINDS FORCE 8 FROM SECTOR N WITH
GUST BETWEEN 35S-45S 30W-50W
WARNING 331: STRONG BARIC GRADIENT MOV E WILL PROVOKE WINDS FORCE 8 FROM NW WITH
GUST IN CENTRAL EAST AREA (40S- 50S AND 20W- 40W) FROM 18/0600
PART 2 GENERAL SYNOPSIS AT 21:00UTC
171400 UTC 1.SEA ICE LIMIT 5753S 02000W 5712S 02618W 5848S 03217W 5925S 03757W
5954S 04317W 6044S 04814W 6151S 05247W 6234S 05655W 6342S 06032W 6413S 06337W
6532S 06559W 6616S 06716W 2.ICEBERGS GREATER THAN 10NM D33B 6147S 05210W 21X12NM
A81 6112S 05327W 28X25NM A76C 5219S 03139W 16X6NM D33C 6315S 05259W 9X4NM A83
6238S 05051W 12X7NM D35 6154S 04434W 28X6NM 3.ICEBERGS SMALLER THAN 10NM
ICEBERG1 6210S 05251W 6X3NM ICEBERG2 6310S 05233W 5X2NM ICEBERG3 6253S 05303W
4X3NM ICEBERG4 6229S 05252W 2X1NM ICEBERG5 5957S 03541W 4X2NM 4.ICEBERGS AREA
A6000S 02000W 4300S 02000W 5300S 03900W 6011S 03900W B6011S 03900W 5500S 03900W
5900S 05000W 6245S 05000W C6245S 05000W 5900S 05000W 6400S 06716W 6700S 06716W
LOW 993HPA 45S 52W MOV SE DPN EXP 50S 20W BY 19/0000 EXTENDS OFNT AT 47S 56W 46S
64W 43S 62W
WFNT AT 48S 47W 49S 41W 48S 37W
PART 3 FORECAST ISSUED 00:00 UTC VALID UNTIL 00:00 UTC 2026-07-19
COASTAL AREAS:
INNER RIO DE LA PLATA: SE 4 WITH GUSTS PROB OF MIST FOG PATCHES DISSIPATING
DURING THE MORNING PROB OFISOL STORMS
TOWARDS THE END OF THE PERIOD VIS MODERATE
OUTER RIO DE LA PLATA: SE 4/5 WITH GUSTS PROB OF MIST FOG PATCHES DURING
DISSIPATING THE MORNING PROB OFISOL STORMS TOWARDS THE END OF THE PERIOD VIS
MODERATE
URUGUAY SOUTH EAST COASTS: NW 4/5 WITH GUSTS BACK SE 4/3 BY 18/1800 PROB OF HVY
STORMS VIS MODERATE TO POOR
MAR DEL PLATA COASTS(3617S - 3830S): SECTOR S 4/5 PROB OF MIST FOG PATCHES VIS
MODERATE OCNL POOR
RINCON BAHIA BLANCA COASTS(3830S - 41S): SECTOR S 4 PROB OF ISOL RAIN STARTING
EARLY MORNING VIS GOOD TO MODERATE
PENINSULA DE VALDES COASTS(41S - 45S): SW 6/4 WITH GUSTS UNSTABLE VIS MODERATE
TO GOOD
GOLFO DE SAN JORGE COASTS(45S - 48S): SECTOR S 7/6 GUST WITH 8 INTENSITY DECR
3 BY 18/1500 PROB OF SH RAIN VIS POOR TO MODERATE
SOUTH PATAGONIA COASTS(48S - 54S) N OF 50S: SECTOR S 7/6 GUST WITH 8 INTENSITY
BACK SECTOR E 4 BY 18/1800 PROB OF RAIN SH RAIN AND SNOW MIXTURE VIS MODERATE
OCNL POOR
SOUTH PATAGONIA COASTS(48S - 54S) REST OF THE AREA: SE 4 VEER VRB 3 BY 18/1200
PROB OF ISOL SNOW FALL VIS MODERATE
FIN DEL MUNDO COASTS(54S - 55S): SECTOR S 4 VEER SECTOR W 4 BY 18/1800 PROB OF
ISOL SNOW FALL VIS MODERATE
ISLAS MALVINAS COASTS: SE 6/4 WITH GUSTS DECR VRB 3 BY 18/1800 PROB OF SH RAIN
AND SNOW MIXTURE VIS MODERATE
OCEANIC AREAS:
NORTH AREA (35S- 40S AND 20W- 55W) E OF 30W: NW 5/5 WITH GUSTS UNSTABLE VIS GOOD
OCNL MODERATE
W OF 30 - E OF 40W: NW 7/8 WITH GUSTS PROB OF ISOL RAIN STORMS STARTING EARLY
MORNING VIS MODERATE TO POOR
W OF 40 - E OF 50W: NW 8/7 WITH GUSTS PROB OF HVY RAIN STORMS VIS POOR
REST OF THE AREA: SECTOR S 4 PROB OF MIST FOG PATCHES DRIZZLE VIS MODERATE OCNL
POOR
CENTRAL EAST AREA (40S- 50S AND 20W- 40W) E OF 30W: NW 6/7 WITH GUSTS INCR 8
WITH GUSTS BY 18/1200 PROB OF RAIN VIS VERY POOR
W OF 30 - N OF 45S: NW 8 WITH GUSTS PROB OF ISOL RAIN STORMS VIS VERY POOR TO
POOR
REST OF THE AREA: NW 7/8 WITH GUSTS VEER SECTOR S 6 WITH GUSTS BY 18/1800 PROB
OF RAIN AND SNOW MIXTURE VIS VERY POOR
CENTRAL WEST AREA (40S- 50S AND 40W- 60W) E OF 50 - N OF 45S: NW 7/8 WITH GUSTS
BACK SECTOR W 5/4 BY 18/1200 PROB OF ISOL RAIN STORMS VIS VERY POOR TO POOR
E OF 50 - S OF 45S: NW 6 WITH GUSTS BACK SE 6 WITH GUSTS BY 18/0900 PROB OF
RAIN AND SNOW MIXTURE VIS VERY POOR
W OF 50 - N OF 45S: SW 5/6 WITH GUSTS PROB OF SH IMPR TOWARDS EVENING VIS POOR
TO MODERATE
REST OF THE AREA: SE 7/6 GUST WITH 8 INTENSITY PROB OF RAIN SNOW FALL VIS VERY
POOR TO MODERATE
SOUTH EAST AREA (50S- 60S AND 20W- 40W) N OF 55S: VRB 3 VEER SE 6/7 GUST WITH 8
INTENSITY BY 18/0900 PROB OF RAIN SNOW FALL VIS POOR
REST OF THE AREA: SECTOR W 6 WITH GUSTS VIS GOOD OCNL MODERATE
SOUTH WEST AREA (50S- 60S AND 40W- 60W) E OF 50 - N OF 55S: SE 5 WITH GUSTS PROB
OF SH RAIN AND SNOW MIXTURE VIS MODERATE
W OF 50 - N OF 55S: SE 5/4 DECR VRB 3 BY 18/2100 PROB OF SH OF SNOW SPELLS OF
GOOD WEATHER VIS MODERATE
REST OF THE AREA: SECTOR W 6/5 WITH GUSTS PROB OF ISOL SNOW FALL SPELLS OF GOOD
WEATHER VIS MODERATE
DRAKE AREA (55S- 60S AND 60W- 67W): SECTOR W 5/6 WITH GUSTS PROB OF SNOW FALL
VIS POOR
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