1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
2025-08-31, 00:00 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 PROVOKES WINDS FORCE 8 FROM SECTOR W
WITH GUST BETWEEN 35S-45S AND 20W-30W UNTIL 31/0900
WARNING 355: STRONG BARIC GRADIENT ON MOV E PROVOKES WINDS FORCE 8 FROM SECTOR N
IN SOUTH PATAGONIA COASTS FIN DEL MUNDO COASTS ISLAS MALVINAS COASTS DRAKE AREA
(55S- 60S AND 60W- 67W) BETWEEN 50S-60S AND 50W-60W FROM 31/0300
PART 2 GENERAL SYNOPSIS AT 21:00UTC
LOW 1004HPA 44S 24W MOV E NC EXTENDS CFNT AT 42S 29W 41S 36W 39S 42W MOV S
HIGH 1041HPA 48S 55W MOV E INTSF EXP 47S 47W BY 31/1500 EXTENDS RIDGE AT 51S 52W
53S 50W 55S 48W MOV NE
301400 UTC 1.SEA ICE LIMIT 5620S 02000W 5602S 02227W 5508S 02654W 5510S 02958W
5650S 03336W 5708S 03813W 5744S 04245W 5858S 04745W 5956S 05215W 6145S 05834W
6322S 06330W 6525S 06716W 2.ICEBERGS GREATER THAN 10NM A23A 5317S 03651W 40X32NM
A74A 5618S 04306W 27X17NM A77 5957S 05532W 27X4NM A76C 5937S 04744W 16X7NM B15AB
6120S 05327W 11X4NM ICEBERG1 5226S 04113W 12X2NM ICEBERG2 5308S 03708W 20X8NM
ICEBERG3 5321S 03712W 13X3NM 3.ICEBERGS SMALLER THAN 10NM A23D 5049S 03531W
8X4NM A23E 5137S 03328W 9X4NM ICEBERG4 5309S 03621W 3X1NM ICEBERG5 5937S 05055W
9X2NM ICEBERG6 5505S 03754W 4X2NM ICEBERG7 5146S 03740W 2X2NM ICEBERG8 4838S
02529W 3X2NM ICEBERG9 5252S 03148W 3X1NM ICEBERG10 5212S 03630W 3X1NM ICEBERG11
4731S 02543W 2X1NM ICEBERG12 5240S 03723W 4X1NM ICEBERG13 5238S 03624W 3X1NM
ICEBERG14 6007S 05405W 6X4NM ICEBERG15 5132S 03351W 2X1NM ICEBERG16 5318S 03755W
3X2NM ICEBERG17 5210S 03644W 3X3NM ICEBERG18 5956S 05439W 2X1NM ICEBERG19 5225S
03434W 3X1NM ICEBERG20 5825S 04541W 3X1NM ICEBERG21 5311S 03628W 3X1NM ICEBERG22
5239S 03648W 9X4NM ICEBERG23 6004S 05359W 3X1NM ICEBERG24 5240S 04039W 4X1NM
ICEBERG25 5328S 03704W 8X3NM 4.ICEBERGS AREA A: 5635S 02000W 4255S 02000W 4440S
03500W 5730S 03500W B: 5730S 03500W 5000S 03500W 5110S 05000W 5920S 04740W C:
5920S 04740W 5600S 04900W 6335S 06716W 6630S 06716W
PART 3 FORECAST ISSUED 00:00 UTC VALID UNTIL 00:00 UTC 2025-9-1
COASTAL AREAS:
INNER RIO DE LA PLATA: SE 4 WITH GUSTS BACK NE 4/5 BY 31/1800 PROB OF RAIN ISOL
STORMS STARTING NOON VIS GOOD TO MODERATE
OUTER RIO DE LA PLATA: SECTOR E 4/5 BACK NE 6/7 GUST WITH 8 INTENSITY BY 31/1200
PROB OF RAIN ISOL STORMS TOWARDS THE END OF THE PERIOD VIS GOOD TO MODERATE OCNL
POOR
URUGUAY SOUTH EAST COASTS: NE 5 WITH GUSTS INCR 6/7 GUST WITH 8 INTENSITY BY
31/1200 PROB OF ISOL RAIN TOWARDS THE END OF THE PERIOD VIS MODERATE
MAR DEL PLATA COASTS(3617S - 3830S): SECTOR E 4 BACK 6/7 GUST WITH 8 INTENSITY
BY 31/1800 PROB OF RAIN SH VIS MODERATE OCNL POOR
RINCON BAHIA BLANCA COASTS(3830S - 41S): SE 4/5 BACK NE 6/7 GUST WITH 8
INTENSITY BY 31/1800 PROB OF RAIN SH VIS MODERATE OCNL POOR
PENINSULA DE VALDES COASTS(41S - 45S): SECTOR E 6/5 BACK NE 6/5 WITH GUSTS BY
31/1800 PROB OF RAIN VIS MODERATE TO POOR
GOLFO DE SAN JORGE COASTS(45S - 48S): SECTOR E 4/5 BACK NE 6 WITH GUSTS BY
31/1200 PROB OF DRIZZLE RAIN STARTING EVENING VIS MODERATE TO POOR
SOUTH PATAGONIA COASTS(48S - 54S): SECTOR N 7/8 WITH GUSTS VIS POOR
FIN DEL MUNDO COASTS(54S - 55S): SECTOR N 7/8 WITH GUSTS VIS POOR.
ISLAS MALVINAS COASTS: SECTOR N 6 WITH GUSTS INCR 7/8 WITH GUSTS BY 31/1800 VIS
MODERATE TO POOR
OCEANIC AREAS:
NORTH AREA (35S- 40S AND 20W- 55W) E OF 35W: SECTOR W 8 WITH GUSTS BACK SECTOR S
6/7 GUST WITH 8 INTENSITY BY 31/1200 PROB OF RAIN SH VIS VERY POOR
W OF 35 - E OF 45W: SE 6/5 WITH GUSTS PROB OF SH IMPR STARTING EVENING VIS
MODERATE TO GOOD
REST OF THE AREA: NE 5 INCR 6/7 GUST WITH 8 INTENSITY BY 31/1500 PROB OF SH VIS
POOR
CENTRAL EAST AREA (40S- 50S AND 20W- 40W) E OF 30 - N OF 45S: SECTOR E 8 WITH
GUSTS BACK SECTOR S 7 WITH GUSTS BY 31/0600 PROB OF RAIN SNOW FALL VIS VERY
POOR
REST OF THE AREA: SECTOR S 6/7 GUST WITH 8 INTENSITY PROB OF SH OF SNOW VIS
VERY POOR
CENTRAL WEST AREA (40S- 50S AND 40W- 60W) E OF 50 - N OF 45S: SECTOR E 6/5 VIS
MODERATE TO GOOD
E OF 50 - S OF 45S: SECTOR S 6 WITH GUSTS DECR VRB 3 BY 31/0900 VIS MODERATE TO
GOOD
REST OF THE AREA: NE 6/7 GUST WITH 8 INTENSITY PROB OF SH RAIN SPELLS OF GOOD
WEATHER VIS MODERATE OCNL POOR
SOUTH EAST AREA (50S- 60S AND 20W- 40W) E OF 30W: SECTOR S 6/5 WITH GUSTS PROB
OF ISOL SNOW FALL VIS MODERATE
REST OF THE AREA: SECTOR S 6 VEER SECTOR W 6 WITH GUSTS BY 31/1500 VIS
MODERATE
SOUTH WEST AREA (50S- 60S AND 40W- 60W) E OF 50W: NW 6/7 WITH GUSTS VIS MODERATE
OCNL POOR
REST OF THE AREA: SECTOR N 6 WITH GUSTS INCR 7/8 WITH GUSTS BY 31/1500 VIS
MODERATE TO POOR
DRAKE AREA (55S- 60S AND 60W- 67W): SECTOR N 7/8 WITH GUSTS PROB OF RAIN TOWARDS
THE END OF THE PERIOD VIS POOR
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1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
12:00 UTC 30, AUGUST 2025.
NATIONAL WEATHER SERVICE (NWS)
SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS
PART 1 STORM WARNING:
962/2025 STRONG BARIC GRADIENT MOV E PROVOKES WINDS FORCE 10 FROM N WITH GUST IN 60S-70S 70W-90W UNTIL 31/0600
963/2025 STRONG BARIC GRADIENT MOV E WILL PROVOKE WINDS FORCE 10 WITH GUST IN 60S-65S 40W-60W
964/2025 STRONG BARIC GRADIENT MOV E WILL PROVOKE WINDS FORCE 10 WITH GUST IN 60S-65S 40W-60W FROM 30/2100
GALE WARNING:
965/2025 STRONG BARIC GRADIENT WILL PROVOKE WINDS FORCE 8 FROM NE WITH GUST IN 60S-73S 40W-60W FROM 30/2100
PART 2 GENERAL SYNOPSIS AT 09:00UTC
LOW 956HPA 68S 90W MOV S DPN EXTENDS CFNT AT 68S 90W 70S 80W 60S 82W ASOCIATED WITH WFNT AT 68S 90W 68S 75W 60S 70W
2IDGE 60S 50W 73S 50W MOV E INTSF
291400 UTC 1.SEA ICE LIMIT 5620S 02000W 5602S 02227W 5508S 02654W 5510S 02958W 5650S 03336W 5708S 03813W 5744S 04245W 5858S 04745W 5956S 05215W 6145S 05834W 6322S 06330W 6525S 06716W 2.ICEBERGS GREATER THAN 10NM A23A 5314S 03651W 40X32NM A74A 5629S 04309W 27X17NM A77 6000S 05537W 27X4NM A76C 5938S 04751W 16X7NM B15AB 6121S 05325W 11X4NM ICEBERG1 5234S 04115W 12X2NM 3.ICEBERGS SMALLER THAN 10NM A23D 5052S 03539W 8X4NM A23E 5137S 03329W 9X4NM A23F 5248S 03644W 9X4NM ICEBERG2 5322S 03608W 3X1NM ICEBERG3 5103S 02945W 3X3NM ICEBERG4 5952S 05114W 9X2NM ICEBERG5 5509S 03803W 4X2NM ICEBERG6 5146S 03740W 2X2NM ICEBERG7 4839S 02523W 3X2NM ICEBERG8 5245S 03147W 3X1NM ICEBERG9 5212S 03630W 3X1NM ICEBERG10 4731S 02543W 2X1NM ICEBERG11 5230S 03721W 4X1NM ICEBERG12 5255S 03619W 3X1NM ICEBERG13 6009S 05406W 6X4NM ICEBERG14 5134S 03431W 2X1NM ICEBERG15 5318S 03755W 3X2NM ICEBERG16 5522S 03641W 3X3NM ICEBERG17 5956S 05444W 2X1NM ICEBERG18 5225S 03434W 3X1NM ICEBERG19 5825S 04541W 3X1NM ICEBERG20 5324S 03622W 3X1NM 4.ICEBERGS AREA A: 5711S 02000W 4300S 02000W 4300S 02300W 4700S 03000W 5550S 03000W B: 5550S 03000W 4700S 03000W 4700S 03500W 5000S 04000W 5856S 04000W C: 5856S 04000W 5100S 04000W 5150S 04800W 5937S 04800W D: 5937S 04800W 5600S 04000W 5700S 05300W 6300S 06716W 6118S 06716W
PART 3 FORECAST ISSUED 12:00 UTC VALID UNTIL 12:00 UTC 2025-08-31
COASTAL AREAS:
SOUTHERN PORTION OF DRAKE STRAIT W OF 58W: NW 7 WITH GUSTS DECR 8/7 WITH GUSTS BY 31/0600 PROB OF FOG MIST PROB OFMOD HVY RAIN SNOW FALL SPELLS OF GOOD WEATHER DURING THE NIGTH VIS VERY POOR TO POOR
SOUTHERN PORTION OF DRAKE STRAIT REST OF THE AREA: SECTOR W 6/5 WITH GUSTS VEER NW 9 WITH GUSTS BY 30/2100 PROB OF FOG MIST VIS MODERATE TO POOR OCNL VERY POOR
MAR DE LA FLOTA COASTS W OF 60W: NW 7 WITH GUSTS DECR 8/7 BY 31/0600 PROB OF FOG MIST PROB OFMOD HVY RAIN SNOW FALL SPELLS OF GOOD WEATHER DURING THE NIGTH VIS VERY POOR TO POOR
MAR DE LA FLOTA COASTS REST OF THE AREA: W 6/5 WITH GUSTS VEER NW 9 WITH GUSTS BY 30/2100 PROB OF FOG MIST VIS MODERATE TO POOR OCNL VERY POOR
GERLACHE STRAIT : NW 8/9 WITH GUSTS DECR 5/4 BY 30/0600 PROB OF FOG MIST DISSIPATING TOWARDS THE END OF THE PERIOD PROB OFMOD HVY SNOW FALL SPELLS OF GOOD WEATHER TOWARDS THE END OF THE PERIOD VIS VERY POOR TO GOOD
MARGARITA BAY : SECTOR N 9/10 WITH GUSTS PROB OF FOG MIST PROB OFMOD HVY SNOW FALL IMPR STARTING EARLY MORNING VIS MODERATE TO POOR OCNL VERY POOR
EREBUS Y TERROR GULF : NW 6/7 INCR 9/10 WITH GUSTS BY 30/2100 DECR 7 GUST WITH 8 INTENSITY BY 31/0900 PROB OF FOG MIST VIS POOR OCNL VERY POOR
OCEANIC AREAS:
NORTHER BELLINGSHAUSEN SEA W OF 80W: N 9/10 WITH GUSTS DECR 7 GUST WITH 8 INTENSITY BY 31/0900 PROB OF FOG MIST PROB OFMOD HVY SNOW FALL SPELLS OF GOOD WEATHER STARTING EVENING VIS VERY POOR TO POOR
NORTHER BELLINGSHAUSEN SEA REST OF THE AREA: NW 9/10 WITH GUSTS DECR 7 GUST WITH 8 INTENSITY BY 31/0900 PROB OF FOG MIST PROB OFHVY SNOW FALL SPELLS OF GOOD WEATHER STARTING NIGTH VIS VERY POOR TO POOR
SOUTHERN BELLINGSHAUSEN SEA (66-73S 70-90W): SECTOR E 9 WITH GUSTS BACK N 7/6 WITH GUSTS BY 30/2100 VEER NE BY 31/0600 PROB OF FOG MIST PROB OFHVY INTERMITTENT SNOW FALL VIS VERY POOR TO POOR
NORTHERN WEDDELL SEA W OF 40 - N OF 65S: SECTOR W 4/3 VEER NW 5 BY 30/2100 AFTERWARDS 8/9 WITH GUSTS BY 31/0300 PROB OF MIST WORSENING STARTING EVENING PROB OFISOL SNOW FALL STARTING EARLY MORNING VIS MODERATE TO VERY POOR
NORTHERN WEDDELL SEA W OF 40 - S OF 65S: SECTOR W 4/2 VEER N 5 BY 30/2100 INCR 8 WITH GUSTS BY 31/0300 PROB OF MIST TOWARDS THE END OF THE PERIOD PROB OFISOL SNOW FALL TOWARDS THE END OF THE PERIOD VIS GOOD TO MODERATE
NORTHERN WEDDELL SEA REST OF THE AREA: SECTOR W 6/5 VIS GOOD
SOUTHERN WEDDELL SEA W OF 40 - S OF 65S: SECTOR W 4/3 VEER N 5 BY 30/2100 INCR 8 WITH GUSTS BY 31/0300 VIS GOOD
SOUTHERN WEDDELL SEA REST OF THE AREA: SECTOR W 6/5 VIS GOOD=