1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
00:00 UTC 31, JULY 2026.
NATIONAL WEATHER SERVICE (NWS)
SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS
PART 1 GALE WARNING:
1025/2026 STRONG BARIC GRADIENT NORTHERN WEDDELL SEA MOV NE DEEPENING PROVOKES WINDS FORCE 8 FROM SECTOR N WITH GUST IN 60S-65S 45W-30W UNTIL 31/0600
1026/2026 STRONG BARIC GRADIENT MAR DE LA FLOTA COASTS EREBUS Y TERROR GULF MOV NE DEEPENING PROVOKES WINDS FORCE 8 FROM SW WITH GUST IN 62S-65S 59W-50W UNTIL 31/1200
1027/2026 STRONG BARIC GRADIENT NORTHERN WEDDELL SEA MOV E DEEPENING WILL PROVOKE WINDS FORCE 8 FROM SECTOR S WITH GUST IN 60S-65S 58W-30W FROM 31/0900 UNTIL 31/2300
PART 2 GENERAL SYNOPSIS AT 21:00UTC
LOW 979HPA 62S 44W MOV E WKN
LOW 976HPA 64S 41W MOV SE DPN
HIGH 1023HPA 61S 90W MOV E INTSF EXTENDS RIDGE AT 61S 90W 65S 80W 68S 74W 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 00:00 UTC VALID UNTIL 00:00 UTC 2026-8-1
COASTAL AREAS:
SOUTHERN PORTION OF DRAKE STRAIT W OF 60W: SW 7/6 WITH GUSTS DECR SW 5/4 WITH GUSTS BY 31/1200 PROB OF MIST PROB OFISOL SNOW FALL IMPR STARTING EARLY MORNING VIS MODERATE TO GOOD
SOUTHERN PORTION OF DRAKE STRAIT REST OF THE AREA: SECTOR S 6/8 WITH GUSTS BACK SE 6/5 BY 31/1500 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 7/6 WITH GUSTS DECR SW 4/4 WITH GUSTS BY 31/1200 PROB OF MIST PROB OFISOL SNOW FALL IMPR STARTING EARLY MORNING VIS MODERATE TO GOOD
MAR DE LA FLOTA COASTS REST OF THE AREA: SECTOR S 7/8 WITH GUSTS BACK SE 6/5 BY 31/1500 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER DURING THE EVENING VIS POOR TO MODERATE
GERLACHE STRAIT : SW 4/5 INCR SW 6/7 WITH GUSTS BY 31/1200 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 31/1500 PROB OF MIST PROB OFISOL SNOW FALL WORSENING DURING THE EVENING VIS GOOD TO MODERATE OCNL POOR
EREBUS Y TERROR GULF : SW 9 WITH GUSTS BACK SECTOR S 5 BY 31/1200 PROB OF FOG AND MIST IN PATCHES BLIZZARD PROB OFISOL SNOW FALL IMPR STARTING EARLY MORNING VIS VERY POOR TO MODERATE OCNL GOOD
OCEANIC AREAS:
NORTHER BELLINGSHAUSEN SEA N OF 64S: SECTOR S 5/4 WITH GUSTS VEER SW 4/3 BY 31/1200 PROB OF MIST PROB OFISOL SNOW FALL IMPR STARTING EARLY MORNING VIS MODERATE TO GOOD
NORTHER BELLINGSHAUSEN SEA REST OF THE AREA: SW 5/4 WITH GUSTS VEER SECTOR W 4/5 WITH GUSTS BY 31/0900 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 31/1500 PROB OF FOG AND MIST IN PATCHES PROB OFISOL SNOW FALL WORSENING DURING THE EARLY MORNING VIS MODERATE TO VERY POOR
NORTHERN WEDDELL SEA N OF 65S: NE 7/8 WITH GUSTS BACK NW 5/4 BY 31/0600 AFTERWARDS SECTOR S 7/8 BY 31/1200 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: SE 3/4 VEER SECTOR S 5/7 WITH GUSTS BY 31/0900 PROB OF MIST PROB OFISOL 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 4 BY 31/0600 PROB OF MIST PROB OFISOL SNOW FALL SPELLS OF GOOD WEATHER STARTING EARLY MORNING VIS MODERATE TO GOOD=
1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
2026-07-31, 00:00 UTC.
NATIONAL WEATHER SERVICE
SEA ICE AND ICEBERGS ISSUED BY SHN
PRESSURE HPA
BEAUFORT SCALE WINDS.
PART 1 GALE WARNING:
WARNING 353: STRONG BARIC GRADIENT ON MOV E WILL PROVOKE WINDS FORCE 8 FROM
SECTOR N WITH GUST IN NORTH AREA (35S- 40S AND 20W- 55W) WESTHERN OF 45 FROM
31/1800
WARNING 352: STRONG BARIC GRADIENT ON MOV E WILL PROVOKE WINDS FORCE 8 FROM
SECTOR N WITH GUST BETWEEN 55S-60S AND 50W-60W
WARNING 351: STRONG BARIC GRADIENT ON PROVOKES WINDS FORCE 8 FROM SECTOR S IN
NORTH AREA (35S- 40S AND 20W- 55W) EASTHERN OF 30
PART 2 GENERAL SYNOPSIS AT 21:00UTC
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
LOW 992HPA 38S 22W MOV E DPN EXTENDS CFNT AT 25S 30W 30S 24W 37S 22W MOV E
HIGH 1025HPA 35S 50W MOV E NC EXTENDS RIDGE AT 43S 46W 45S 35W 46S 20W
CFNT AT 53S 50W 53S 40W 60S 36W MOV E
STRONG BARIC GRADIENT SOUTH WEST AREA (50S- 60S AND 40W- 60W) MOV E
STRONG BARIC GRADIENT GOLFO DE SAN JORGE COASTS PENINSULA DE VALDES COASTS
RINCON BAHIA BLANCA COASTS MOV E
PART 3 FORECAST ISSUED 00:00 UTC VALID UNTIL 00:00 UTC 2026-8-1
COASTAL AREAS:
INNER RIO DE LA PLATA: E 4 BACK NE 5 WORSENING WITH PROB OF RAIN STORMS STARTING
EARLY MORNING VIS GOOD TO MODERATE OCNL POOR
OUTER RIO DE LA PLATA: E 4 BACK NE 5 WITH GUSTS WORSENING WITH PROB OF RAIN
STORMS STARTING EARLY MORNING VIS GOOD TO MODERATE OCNL POOR
URUGUAY SOUTH EAST COASTS: E 5 BACK NE 6 WITH GUSTS WORSENING WITH PROB OF RAIN
STORMS STARTING EVENING VIS GOOD TO MODERATE OCNL POOR
MAR DEL PLATA COASTS(3617S - 3830S): NE 5/7 WITH GUSTS WORSENING WITH PROB OF
HVY RAIN STORMS STARTING EVENING VIS GOOD TO POOR
RINCON BAHIA BLANCA COASTS(3830S - 41S): NE 6/7 WITH GUSTS BACK N 4 WORSENING
WITH PROB OF HVY RAIN STORMS STARTING EARLY MORNING STARTING EARLY MORNING VIS
GOOD TO POOR
PENINSULA DE VALDES COASTS(41S - 45S): NE 6/7 WITH GUSTS BACK N 6/4 BACK SW 5
PROB OF RAIN SPELLS OF GOOD WEATHER VIS MODERATE OCNL POOR
GOLFO DE SAN JORGE COASTS(45S - 48S): NE 6 WITH GUSTS VEER VRB 5 WITH GUSTS
VEER SE 5/6 WITH GUSTS PROB OF RAIN SPELLS OF GOOD WEATHER VIS MODERATE OCNL
POOR
SOUTH PATAGONIA COASTS(48S - 54S) N OF 50S: NE 5/6 WITH GUSTS VEER SE 6 WITH
GUSTS PROB OF RAIN SPELLS OF GOOD WEATHER VIS MODERATE OCNL POOR
SOUTH PATAGONIA COASTS(48S - 54S) REST OF THE AREA: VRB 4 VEER SECTOR E 4/6
WITH GUSTS FOG MIST WORSENING WITH PROB OF DRIZZLE RAIN VIS MODERATE OCNL POOR
FIN DEL MUNDO COASTS(54S - 55S): SW 4 BACK SE 5 WITH GUSTS PROB OF MIST
UNSTABLE VIS GOOD OCNL MODERATE
ISLAS MALVINAS COASTS: SW 5 WITH GUSTS BACK SE WITH GUSTS PROB OF ISOL DRIZZLE
RAIN VIS GOOD OCNL MODERATE
OCEANIC AREAS:
NORTH AREA (35S- 40S AND 20W- 55W) E OF 30W: SECTOR S 8 WITH GUSTS DECR 5 WITH
GUSTS PROB OF HVY RAIN STORMS IMPR TOWARDS THE END OF THE PERIOD VIS POOR TO
GOOD
W OF 45W: VRB 5 BACK SECTOR N 6/8 WITH GUSTS WORSENING WITH PROB OF HVY RAIN
STORMS STARTING EVENING VIS GOOD TO POOR
REST OF THE AREA: SW 6 WITH GUSTS BACK S 4 BACK SECTOR N 3/5 PROB OF SH RAIN
IMPR STARTING EARLY MORNING VIS MODERATE TO GOOD
CENTRAL EAST AREA (40S- 50S AND 20W- 40W) E OF 30 - N OF 45S: SE 7 WITH GUSTS
BACK S 5/4 PROB OF ISOL RAIN SPELLS OF GOOD WEATHER VIS MODERATE OCNL GOOD
W OF 30 - N OF 45S: S 5/3 VEER SECTOR W 5 LOW PROB OF ISOL RAIN VIS GOOD OCNL
MODERATE
E OF 30 - S OF 45S: S 5 VEER NW 6/7 WITH GUSTS WORSENING WITH PROB OF ISOL RAIN
VIS GOOD TO MODERATE OCNL POOR
REST OF THE AREA: W 4 INCR 6/7 WITH GUSTS PROB OF RAIN VIS MODERATE OCNL POOR
CENTRAL WEST AREA (40S- 50S AND 40W- 60W) E OF 50 - N OF 45S: SW 4/3 VEER NW 5/6
WITH GUSTS TOWARDS THE END OF THE PERIOD WORSENING VIS GOOD
S OF 47S: W 5 WITH GUSTS VEER NW 6 WITH GUSTS BACK SE 7 WITH GUSTS PROB OF RAIN
VIS MODERATE TO POOR
REST OF THE AREA: NW 5 VEER N 6/7 WITH GUSTS PROB OF ISOL RAIN STORMS VIS
MODERATE OCNL POOR
SOUTH EAST AREA (50S- 60S AND 20W- 40W) E OF 30W: SW 5 WITH GUSTS VEER NW 6/7
WITH GUSTS PROB OF ISOL RAIN VIS MODERATE OCNL POOR
REST OF THE AREA: NW 7 WITH GUSTS BACK SECTOR W 7 WITH GUSTS BACK SW 8 WITH
GUSTS PROB OF ISOL RAIN VIS MODERATE TO POOR
SOUTH WEST AREA (50S- 60S AND 40W- 60W) W OF 50 - S OF 55S: SW 8 WITH GUSTS BACK
S 7/6 WITH GUSTS PROB OF ISOL RAIN SNOW FALL IMPR VIS MODERATE OCNL POOR TO
GOOD
E OF 50 - S OF 55S: W 6/7 WITH GUSTS BACK SW 8 WITH GUSTS PROB OF ISOL RAIN
SNOW FALL VIS MODERATE OCNL POOR
REST OF THE AREA: W 6/7 WITH GUSTS BACK S 7/6 WITH GUSTS PROB OF SH RAIN VIS
MODERATE OCNL POOR
DRAKE AREA (55S- 60S AND 60W- 67W): SW 6 WITH GUSTS BACK SE 5/4 VIS GOOD
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