1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
2026-07-31, 12:00 UTC.
NATIONAL WEATHER SERVICE
SEA ICE AND ICEBERGS ISSUED BY SHN
PRESSURE HPA
BEAUFORT SCALE WINDS.
PART 1 GALE WARNING:
WARNING 356: STRONG BARIC GRADIENT ON MOV E WILL PROVOKE WINDS FORCE 8 FROM
SECTOR W WITH GUST BETWEEN 40S-50S 20W-40W FROM 01/0000
WARNING 355: STRONG BARIC GRADIENT MOV E WILL PROVOKE WINDS FORCE 8 FROM NE WITH
GUST IN URUGUAY SOUTH EAST COASTS MAR DEL PLATA COASTS FROM 31/1800 UNTIL
01/0600
WARNING 354: STRONG BARIC GRADIENT MOV E PROVOKES WINDS FORCE 8 FROM SECTOR W
WITH GUST BETWEEN 50S-60S 20W-40W
WARNING 353: STRONG BARIC GRADIENT MOV E WILL PROVOKE WINDS FORCE 8 FROM SECTOR
N WITH GUST BETWEEN 35S-45S AND 40W-60W FROM 31/1800
PART 2 GENERAL SYNOPSIS AT 09:00UTC
LOW 998HPA 47S 65W MOV NE DPN EXP 44S 48W BY 01/1200 EXTENDS CFNT AT 42S 66W 45S
63W 47S 63W MOV NE
STRONG BARIC GRADIENT URUGUAY SOUTH EAST COASTS MAR DEL PLATA COASTS MOV E
HIGH 1028HPA 38S 43W MOV NE EXP 35S 30W BY 01/1200
CFNT AT 52S 34W 55S 29W 60S 29W MOV E
301400 UTC 1.SEA ICE LIMIT 5755S 02000W 5553S 02618W 5742S 03217W 5752S 03757W
5825S 04317W 5950S 04814W 6123S 05248W 6201S 05654W 6323S 06032W 6404S 06337W
6525S 06559W 6330S 06716W 2.ICEBERGS GREATER THAN 10NM D33B 60 19S 052 34W
21X12NM A81 61 02S 051 58W 28X25NM A76C 52 27S 031 04W 16X6NM 3.ICEBERGS SMALLER
THAN 10NM ICEBERG1 5934S 05053W 2X1NM 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 2026-8-1
COASTAL AREAS:
INNER RIO DE LA PLATA: SECTOR N 4 WITH GUSTS BACK SW BY 1/0000 PROB OF STORMS
TOWARDS THE END OF THE PERIOD IMPR VIS MODERATE TO POOR
OUTER RIO DE LA PLATA: SECTOR N 5 WITH GUSTS BACK SECTOR S 4 WITH GUSTS BY
1/0000 PROB OF STORMS TOWARDS THE END OF THE PERIOD IMPR VIS MODERATE TO POOR
URUGUAY SOUTH EAST COASTS: NE 7/8 WITH GUSTS DECR BY 1/0600 PROB OF STORMS
DURING THE EVENING VIS MODERATE TO VERY POOR
MAR DEL PLATA COASTS(3617S - 3830S): NE 6/8 WITH GUSTS BACK SW 5 WITH GUSTS BY
31/2100 PROB OF STORMS TOWARDS EVENING VIS GOOD TO VERY POOR
RINCON BAHIA BLANCA COASTS(3830S - 41S): SECTOR N 6/4 WITH GUSTS BACK SW 6
WITH GUSTS BY 31/2100 PROB OF STORMS TOWARDS THE END OF THE PERIOD IMPR VIS
MODERATE TO POOR
PENINSULA DE VALDES COASTS(41S - 45S): SECTOR N 7/5 WITH GUSTS BACK SW BY
31/1500 PROB OF ISOL RAIN SPELLS OF GOOD WEATHER VIS MODERATE OCNL GOOD
GOLFO DE SAN JORGE COASTS(45S - 48S): SECTOR S 5/6 WITH GUSTS DECR BY 1/0000
PROB OF ISOL RAIN VIS MODERATE TO POOR OCNL GOOD
SOUTH PATAGONIA COASTS(48S - 54S) N OF 50S: SECTOR E 7/5 WITH GUSTS PROB OF
RAIN SNOW FALL VIS POOR OCNL MODERATE
SOUTH PATAGONIA COASTS(48S - 54S) REST OF THE AREA: SECTOR E 5/6 WITH GUSTS
DECR BY 1/0600 PROB OF RAIN SNOW FALL VIS POOR OCNL MODERATE
FIN DEL MUNDO COASTS(54S - 55S): SECTOR S 5 WITH GUSTS BACK SECTOR E 4 WITH
GUSTS BY 31/2100 PROB OF ISOL SNOW FALL SPELLS OF GOOD WEATHER VIS MODERATE OCNL
GOOD
ISLAS MALVINAS COASTS: SECTOR S 4/6 WITH GUSTS BACK SECTOR E 4 WITH GUSTS BY
1/0300 PROB OF ISOL RAIN SNOW FALL VIS MODERATE OCNL POOR
OCEANIC AREAS:
NORTH AREA (35S- 40S AND 20W- 55W) E OF 40W: SECTOR S 7 WITH GUSTS BACK SECTOR N
6 WITH GUSTS BY 31/2100 PROB OF RAIN TOWARDS NIGTH IMPR VIS POOR TO GOOD
REST OF THE AREA: SECTOR N 6/8 WITH GUSTS PROB OF STORMS TOWARDS EVENING VIS
MODERATE TO VERY POOR
CENTRAL EAST AREA (40S- 50S AND 20W- 40W): SECTOR W 6/8 WITH GUSTS PROB OF RAIN
AND SNOW MIXTURE SNOW FALL VIS MODERATE TO VERY POOR
CENTRAL WEST AREA (40S- 50S AND 40W- 60W) N OF 45S: SECTOR N 7/8 WITH GUSTS PROB
OF RAIN STORMS VIS VERY POOR TO POOR
REST OF THE AREA: SECTOR N 6/7 WITH GUSTS BACK SECTOR E BY 31/1800 PROB OF RAIN
RAIN AND SNOW MIXTURE VIS POOR
SOUTH EAST AREA (50S- 60S AND 20W- 40W): SECTOR W 8 WITH GUSTS PROB OF RAIN AND
SNOW MIXTURE SNOW FALL VIS VERY POOR
SOUTH WEST AREA (50S- 60S AND 40W- 60W) E OF 50W: SECTOR W 7 WITH GUSTS BACK
SECTOR S 6 WITH GUSTS BY 31/1800 PROB OF SNOW FALL VIS POOR
REST OF THE AREA: SECTOR S 7/6 WITH GUSTS PROB OF SNOW FALL SPELLS OF GOOD
WEATHER VIS POOR OCNL MODERATE
DRAKE AREA (55S- 60S AND 60W- 67W): SECTOR S 5/4 WITH GUSTS BACK SECTOR E BY
1/2100 PROB OF ISOL SNOW FALL TOWARDS EVENING IMPR VIS MODERATE TO GOOD
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1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
12:00 UTC 31, JULY 2026.
NATIONAL WEATHER SERVICE (NWS)
SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS
PART 1 GALE WARNING:
1028/2026 STRONG BARIC GRADIENT NORTHERN WEDDELL SEA MOV E DEEPENING PROVOKES WINDS FORCE 8 FROM SECTOR S WITH GUST IN 60S-66S 58W-30W UNTIL 01/1500
PART 2 GENERAL SYNOPSIS AT 09:00UTC
LOW 973HPA 62S 38W MOV E WKN
LOW 974HPA 64S 41W MOV SE DPN
HIGH 1024HPA 62S 85W MOV E INTSF EXTENDS RIDGE AT 62S 85W 65S 80W 68S 73W MOV E
HIGH 1011HPA 64S 55W MOV E INTSF
301400 UTC 1.SEA ICE LIMIT 5755S 02000W 5553S 02618W 5742S 03217W 5752S 03757W 5825S 04317W 5950S 04814W 6123S 05248W 6201S 05654W 6323S 06032W 6404S 06337W 6525S 06559W 6330S 06716W 2.ICEBERGS GREATER THAN 10NM D33B 60 19S 052 34W 21X12NM A81 61 02S 051 58W 28X25NM A76C 52 27S 031 04W 16X6NM 3.ICEBERGS SMALLER THAN 10NM ICEBERG1 5934S 05053W 2X1NM 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 2026-8-1
COASTAL AREAS:
SOUTHERN PORTION OF DRAKE STRAIT W OF 60W: SW 6/5 WITH GUSTS VEER SECTOR W 5/3 WITH GUSTS BY 1/0000 PROB OF MIST PROB OFISOL SNOW FALL WORSENING TOWARDS NIGTH VIS GOOD TO MODERATE
SOUTHERN PORTION OF DRAKE STRAIT REST OF THE AREA: SECTOR S 6/5 WITH GUSTS VEER SECTOR W 5 BY 1/0000 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER DURING THE EVENING VIS POOR TO MODERATE
MAR DE LA FLOTA COASTS W OF 60W: SW 6/5 WITH GUSTS VEER 5/4 WITH GUSTS BY 1/0000 PROB OF MIST PROB OFISOL SNOW FALL WORSENING TOWARDS NIGTH VIS GOOD TO MODERATE
MAR DE LA FLOTA COASTS REST OF THE AREA: SECTOR E 5/5 WITH GUSTS VEER SECTOR W 5 WITH GUSTS BY 31/2100 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER DURING THE EARLY MORNING VIS POOR TO MODERATE
GERLACHE STRAIT : SW 4/5 BACK SECTOR S 4 BY 1/0000 PROB OF MIST PROB OFISOL SNOW FALL WORSENING DURING THE EVENING VIS GOOD TO MODERATE OCNL POOR
MARGARITA BAY : NE 3/4 BACK SECTOR N 4 BY 31/1800 PROB OF MIST PROB OFISOL SNOW FALL WORSENING DURING THE EVENING VIS GOOD TO MODERATE OCNL POOR
EREBUS Y TERROR GULF : SECTOR S 5/4 VEER SW 5/6 BY 31/2100 PROB OF FOG AND MIST IN PATCHES WORSENING TOWARDS NIGTH VIS GOOD TO MODERATE OCNL VERY POOR
OCEANIC AREAS:
NORTHER BELLINGSHAUSEN SEA N OF 65S: SECTOR W 2/4 VEER NW 4/3 BY 31/2100 PROB OF MIST PROB OFISOL SNOW FALL IMPR STARTING NIGTH VIS MODERATE TO GOOD
NORTHER BELLINGSHAUSEN SEA REST OF THE AREA: SECTOR W 5/4 WITH GUSTS VEER NW 4/5 WITH GUSTS BY 31/2100 PROB OF MIST PROB OFISOL SNOW FALL IMPR TOWARDS NIGTH VIS MODERATE TO GOOD
SOUTHERN BELLINGSHAUSEN SEA (66-73S 70-90W): SECTOR W 4/5 VEER NW 4/5 BY 31/1800 PROB OF FOG AND MIST IN PATCHES PROB OFISOL SNOW FALL SPELLS OF GOOD WEATHER DURING THE NIGTH VIS VERY POOR TO MODERATE
NORTHERN WEDDELL SEA N OF 65S: SECTOR S 7/8 WITH GUSTS VEER SW 5/4 BY 1/0300 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER DURING THE EVENING VIS POOR TO MODERATE OCNL GOOD
NORTHERN WEDDELL SEA REST OF THE AREA: SECTOR S 5/7 WITH GUSTS VEER SW 4 BY 1/0300 PROB OF MIST PROB OFISOL SNOW FALL IMPR DURING THE EARLY MORNING VIS MODERATE TO GOOD
SOUTHERN WEDDELL SEA (68-78S 20-60W): NE 4/5 VEER SECTOR E 4/3 BY 31/1200 PROB OF MIST VIS MODERATE TO GOOD=