1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
2026-08-13, 12:00 UTC.
NATIONAL WEATHER SERVICE
SEA ICE AND ICEBERGS ISSUED BY SHN
PRESSURE HPA
BEAUFORT SCALE WINDS.
PART 1 GALE WARNING:
WARNING 377: STRONG BARIC GRADIENT MOV E PROVOKES WINDS FORCE 8 FROM SW WITH
GUST BETWEEN 40S-45S AND 30W-40W
WARNING 376: STRONG BARIC GRADIENT MOV E PROVOKES WINDS FORCE 8 FROM SECTOR W
WITH GUST BETWEEN 35S-40S AND 20W-30W
PART 2 GENERAL SYNOPSIS AT 09:00UTC
LOW 978HPA 44S 22W MOV E INTSF EXTENDS CFNT44S 19W 36S 30W 35S 45W MOV E
STRONG BARIC GRADIENT BETWEEN IN 35S-40S 20-30W MOV E NC
STRONG BARIC GRADIENT BETWEEN IN 40S-45S 30-40W MOV E NC
121400 UTC 1.SEA ICE LIMIT 5803S 02000W 5605S 02618W 5702S 03217W 5731S 03757W
5737S 04317W 5926S 04814W 6027S 05248W 6203S 05655W 6333S 06033W 6409S 06337W
6408S 06559W 6257S 06716W 2.ICEBERGS GREATER THAN 10NM D33B 6047S 05248W 21X12NM
A81 5911S 05114W 28X25NM A76C 5248S 03055W 16X6NM 3.ICEBERGS SMALLER THAN 10NM
D33C 6129S 05345W 9X5NM ICEBERG1 6132S 05303W 5X3NM ICEBERG2 6121S 05300W 5X3NM
ICEBERG3 6044S 05201W 6X4NM 4.ICEBERGS AREA A5820S 02000W 4600S 02000W 5300S
03800W 5805S 03800W B5805S 03800W 5300S 03800W 5800S 05000W 6040S 05000W C6040S
05000W 5800S 05000W 6300S 06716W 6620S 06716W
HIGH 1032HPA 44S 59W MOV NE INTSF EXP 40S 55W BY 14/1200 EXTENDS RIDGE AT 44S
59W 51S 64W 57S 69W MOV E
PART 3 FORECAST ISSUED 12:00 UTC VALID UNTIL 12:00 UTC 2026-08-14
COASTAL AREAS:
INNER RIO DE LA PLATA: SE 4/3 BACK SECTOR E 4 PROB OF ISOL RAIN STARTING EVENING
VIS GOOD TO MODERATE
OUTER RIO DE LA PLATA: SE 4 BACK SECTOR E 4 PROB OF ISOL RAIN STARTING EVENING
VIS GOOD TO MODERATE
URUGUAY SOUTH EAST COASTS: SE 4 BACK SECTOR E 4 PROB OF ISOL RAIN STARTING
EVENING VIS GOOD TO MODERATE
MAR DEL PLATA COASTS(3617S - 3830S): SE 3 BACK NE 3/4 PROB OF MIST FOG PATCHES
STARTING EARLY MORNING VIS GOOD OCNL MODERATE
RINCON BAHIA BLANCA COASTS(3830S - 41S): NE 3/5 WITH GUSTS PROB OF MIST FOG
PATCHES DISSIPATING VIS MODERATE TO GOOD
PENINSULA DE VALDES COASTS(41S - 45S): SECTOR E 3 BACK NE 4/5 WITH GUSTS MIST
FOG PATCHES DISSIPATING VIS POOR TO GOOD
GOLFO DE SAN JORGE COASTS(45S - 48S): SECTOR N 4/5 PROB OF ISOL RAIN MIST FOG
PATCHES DISSIPATING VIS POOR TO MODERATE
SOUTH PATAGONIA COASTS(48S - 54S): SECTOR N 4 PROB OF ISOL RAIN MIST FOG
PATCHES DISSIPATING VIS POOR TO MODERATE
FIN DEL MUNDO COASTS(54S - 55S): SECTOR W 3 VEER SECTOR N 3 MIST FOG PATCHES
DISSIPATING PROB OF MIST FOG PATCHES STARTING EARLY MORNING ISOL RAIN VIS POOR
OCNL MODERATE
ISLAS MALVINAS COASTS: SECTOR W 5 WITH GUSTS VEER SECTOR N 3 PROB OF ISOL RAIN
VIS POOR TO MODERATE
OCEANIC AREAS:
NORTH AREA (35S- 40S AND 20W- 55W) E OF 30W: NW 8 WITH GUSTS BACK SW 8/7 WITH
GUSTS PROB OF SH VIS POOR
E OF 40 - W OF 30W: SW 8/7 WITH GUSTS PROB OF SH VIS POOR
E OF 50 - W OF 40W: SECTOR S 6/5 WITH GUSTS PROB OF SH VIS POOR TO MODERATE
REST OF THE AREA: SECTOR S 4 BACK SECTOR E 3 PROB OF SH IMPR VIS MODERATE TO
GOOD
CENTRAL EAST AREA (40S- 50S AND 20W- 40W) E OF 30W: SECTOR S 7 WITH GUSTS PROB
OF SH OF SNOW VIS POOR
NW OF THE REGION: SW 8/7 WITH GUSTS PROB OF SH OF SNOW NXT RAIN VIS POOR
REST OF THE AREA: SECTOR S 7/6 WITH GUSTS PROB OF SH OF SNOW VIS POOR
CENTRAL WEST AREA (40S- 50S AND 40W- 60W) E OF 50W: SW 7/6 WITH GUSTS PROB OF SH
OF SNOW NXT SH OF RAIN VIS POOR
NW OF THE REGION: VRB 3 BACK SECTOR N 3/4 VIS GOOD
REST OF THE AREA: SECTOR W 4 VEER NW 4 PROB OF MIST FOG PATCHES PROB OF DRIZZLE
VIS POOR OCNL MODERATE
SOUTH EAST AREA (50S- 60S AND 20W- 40W) E OF 30W: SW 6 WITH GUSTS PROB OF SNOW
FALL VIS POOR
REST OF THE AREA: SW 7/6 WITH GUSTS VEER SECTOR W 5 WITH GUSTS PROB OF SNOW
FALL VIS POOR
SOUTH WEST AREA (50S- 60S AND 40W- 60W): SW 7 WITH GUSTS PROB OF SNOW FALL VIS
POOR
DRAKE AREA (55S- 60S AND 60W- 67W): SW 7/5 WITH GUSTS BACK SECTOR E 3/4 MIST FOG
PATCHES DISSIPATING PROB OF MIST FOG PATCHES STARTING EARLY MORNING RAIN SNOW
FALL VIS POOR
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1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
12:00 UTC 13, AUGUST 2026.
NATIONAL WEATHER SERVICE (NWS)
SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS
PART 1 GALE WARNING:
1049/2026 STRONG BARIC GRADIENT SOUTHERN PORTION OF DRAKE STRAIT MAR DE LA FLOTA COASTS MOV E DEEPENING WILL PROVOKE WINDS FORCE 8 FROM SW WITH GUST IN 61S-64S 65W-55W FROM 13/2100 UNTIL 14/1800
PART 2 GENERAL SYNOPSIS AT 09:00UTC
LOW 992HPA 64S 55W MOV SE DPN
LOW 993HPA 67S 59W MOV E WKN
RIDGE 60S 48W 63S 46W 66S 42W MOV E INTSF
121400 UTC 1.SEA ICE LIMIT 5803S 02000W 5605S 02618W 5702S 03217W 5731S 03757W 5737S 04317W 5926S 04814W 6027S 05248W 6203S 05655W 6333S 06033W 6409S 06337W 6408S 06559W 6257S 06716W 2.ICEBERGS GREATER THAN 10NM D33B 6047S 05248W 21X12NM A81 5911S 05114W 28X25NM A76C 5248S 03055W 16X6NM 3.ICEBERGS SMALLER THAN 10NM D33C 6129S 05345W 9X5NM ICEBERG1 6132S 05303W 5X3NM ICEBERG2 6121S 05300W 5X3NM ICEBERG3 6044S 05201W 6X4NM 4.ICEBERGS AREA A5820S 02000W 4600S 02000W 5300S 03800W 5805S 03800W B5805S 03800W 5300S 03800W 5800S 05000W 6040S 05000W C6040S 05000W 5800S 05000W 6300S 06716W 6620S 06716W
PART 3 FORECAST ISSUED 12:00 UTC VALID UNTIL 12:00 UTC 2026-08-14
COASTAL AREAS:
SOUTHERN PORTION OF DRAKE STRAIT W OF 60W: SW 6/7 WITH GUSTS VEER SECTOR W 5/4 BY 14/0300 PROB OF MIST PROB OFISOL SNOW FALL IMPR TOWARDS NIGTH VIS POOR TO MODERATE OCNL GOOD
SOUTHERN PORTION OF DRAKE STRAIT REST OF THE AREA: SECTOR W 4/5 WITH GUSTS BACK SW 5/6 WITH GUSTS BY 14/0000 PROB OF MIST PROB OFINTERMITTENT SNOW FALL IMPR TOWARDS NIGTH VIS POOR TO MODERATE OCNL GOOD
MAR DE LA FLOTA COASTS W OF 60W: SW 6/7 WITH GUSTS VEER SECTOR W 5/4 BY 14/0300 PROB OF MIST PROB OFISOL SNOW FALL IMPR TOWARDS NIGTH VIS POOR TO MODERATE OCNL GOOD
MAR DE LA FLOTA COASTS REST OF THE AREA: SECTOR W 4/5 WITH GUSTS BACK SW 5/6 WITH GUSTS BY 14/0000 PROB OF MIST PROB OFINTERMITTENT SNOW FALL IMPR TOWARDS NIGTH VIS POOR TO MODERATE OCNL GOOD
GERLACHE STRAIT : NE 4/3 VEER SECTOR S 4/2 BY 13/1800 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER DURING THE NOON VIS VERY POOR TO MODERATE
MARGARITA BAY : NE 3/4 BACK SECTOR N 4/3 BY 13/1800 PROB OF MIST PROB OFINTERMITTENT SNOW FALL WORSENING STARTING NOON VIS GOOD TO MODERATE OCNL POOR
EREBUS Y TERROR GULF : SW 6/7 WITH GUSTS VEER SECTOR W 5/6 WITH GUSTS BY 14/0300 PROB OF FOG AND MIST IN PATCHES IMPR DURING THE EVENING VIS GOOD TO MODERATE OCNL VERY POOR
OCEANIC AREAS:
NORTHER BELLINGSHAUSEN SEA N OF 64S: SECTOR W 5/6 WITH GUSTS VEER NW 4/5 WITH GUSTS BY 13/1800 PROB OF MIST PROB OFISOL SNOW FALL SPELLS OF GOOD WEATHER DURING THE NOON VIS POOR TO MODERATE OCNL GOOD
NORTHER BELLINGSHAUSEN SEA REST OF THE AREA: SECTOR W 4/5 VEER NW 5 WITH GUSTS BY 13/2100 PROB OF MIST PROB OFMOD SNOW FALL SPELLS OF GOOD WEATHER DURING THE EVENING VIS POOR TO MODERATE OCNL GOOD
SOUTHERN BELLINGSHAUSEN SEA (66-73S 70-90W): NW 3/4 BACK SW 4/5 BY 14/0300 PROB OF FOG AND MIST IN PATCHES PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER TOWARDS NIGTH VIS VERY POOR TO MODERATE
NORTHERN WEDDELL SEA N OF 64S: SECTOR W 3/4 WITH GUSTS VEER NW 4/5 BY 13/2100 PROB OF FOG AND MIST IN PATCHES IMPR STARTING NOON VIS VERY POOR TO MODERATE OCNL GOOD
NORTHERN WEDDELL SEA REST OF THE AREA: SECTOR W 3/4 VEER NW 4/3 BY 14/0300 PROB OF MIST VIS MODERATE TO GOOD
SOUTHERN WEDDELL SEA (68-78S 20-60W): SE 3/4 BACK NE 4/5 BY 13/1800 PROB OF MIST PROB OFISOL SNOW FALL WORSENING STARTING NOON VIS GOOD TO MODERATE=