1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
2025-11-20, 00:00 UTC.
NATIONAL WEATHER SERVICE
SEA ICE AND ICEBERGS ISSUED BY SHN
PRESSURE HPA
BEAUFORT SCALE WINDS.
PART 1 GALE WARNING:
WARNING 472: STRONG BARIC GRADIENT WILL PROVOKE WINDS FORCE 8 FROM SECTOR E WITH
GUST IN INNER RIO DE LA PLATA OUTER RIO DE LA PLATA FROM 20/2100
WARNING 471: STRONG BARIC GRADIENT PROVOKES WINDS FORCE 8 FROM NW WITH GUST
BETWEEN 35S-40S AND 20W-30W
WARNING 469: LOW 963HPA AT 53S 33W MOV SE WEAKENING EXPECTED 56S 26W BY 20/1200
PROVOKES WINDS FORCE 8 FROM NW WITH GUST BETWEEN 50S-55S AND 20W-40W
PART 2 GENERAL SYNOPSIS AT 21:00UTC
LOW 963HPA 53S 33W MOV SE WKN EXP 56S 26W BY 20/1200 EXTENDS CFNT AT 53S 23W 52S
19W 41S 26W MOV NE
CFNT AT 41S 20W 37S 24W 35S 27W MOV NE
PART 3 FORECAST ISSUED 00:00 UTC VALID UNTIL 00:00 UTC 2025-11-21
COASTAL AREAS:
INNER RIO DE LA PLATA: NE 4/5 WITH GUSTS BACK SE 6/7 GUST WITH 8 INTENSITY BY
20/1800 INCR 7/8 WITH GUSTS PROB OF HVY RAIN STORMS STARTING EVENING VIS GOOD TO
POOR
OUTER RIO DE LA PLATA: NE 4/5 WITH GUSTS BACK SE 6/7 GUST WITH 8 INTENSITY BY
20/1800 INCR 7/8 WITH GUSTS PROB OF HVY RAIN STORMS STARTING EVENING VIS GOOD TO
POOR
URUGUAY SOUTH EAST COASTS: NE 4/5 WITH GUSTS VEER SECTOR E 6/7 GUST WITH 8
INTENSITY BY 20/2100 PROB OF RAIN STORMS STARTING EVENING VIS GOOD TO MODERATE
MAR DEL PLATA COASTS(3617S - 3830S): NE 4/5 WITH GUSTS BACK SW 4/5 WITH GUSTS
BY 20/1800 PROB OF DRIZZLE DURING THE MORNING PROB OF RAIN STORMS STARTING EARLY
MORNING VIS GOOD TO MODERATE
RINCON BAHIA BLANCA COASTS(3830S - 41S): SECTOR E 5 WITH GUSTS VEER SE 6/7
GUST WITH 8 INTENSITY BY 20/1200 PROB OF SH RAIN STARTING EVENING VIS GOOD TO
MODERATE
PENINSULA DE VALDES COASTS(41S - 45S): NE 5 WITH GUSTS VEER SECTOR E 5/6 WITH
GUSTS BY 20/1500 VEER SE 5 WITH GUSTS BY 20/2100 PROB OF ISOL RAIN SPELLS OF
GOOD WEATHER PROB OFISOL STORMS DURING THE EVENING VIS GOOD TO MODERATE
GOLFO DE SAN JORGE COASTS(45S - 48S): NE 4/5 WITH GUSTS BACK VRB 4/3 BY
20/0900 BACK NE 3/4 WITH GUSTS BY 20/1800 PROB OF DRIZZLE RAIN IMPR STARTING
EARLY MORNING VIS MODERATE TO GOOD
SOUTH PATAGONIA COASTS(48S - 54S): SECTOR W 4 WITH GUSTS BACK SW 4/5 WITH
GUSTS BY 20/0900 PROB OF DRIZZLE RAIN IMPR STARTING EARLY MORNING VIS MODERATE
TO GOOD
FIN DEL MUNDO COASTS(54S - 55S): SW 4/5 WITH GUSTS VEER SECTOR W 4 WITH GUSTS
BY 20/1800 PROB OF SH RAIN IMPR STARTING EVENING VIS MODERATE TO GOOD
ISLAS MALVINAS COASTS: SW 4/5 WITH GUSTS PROB OF SH RAIN IMPR STARTING NIGTH VIS
MODERATE TO GOOD
OCEANIC AREAS:
NORTH AREA (35S- 40S AND 20W- 55W) E OF 30W: NW 8/7 WITH GUSTS PROB OF RAIN
STORMS VIS POOR
E OF 50 - W OF 30W: SW 7/6 GUST WITH 8 INTENSITY DECR 6/5 WITH GUSTS BY 20/1200
VEER SECTOR W 5 WITH GUSTS BY 20/1800 PROB OF SH RAIN IMPR TOWARDS THE END OF
THE PERIOD VIS MODERATE OCNL POOR TO GOOD
REST OF THE AREA: SW 7/6 GUST WITH 8 INTENSITY VEER SECTOR N 5 WITH GUSTS BY
20/1200 PROB OF RAIN STORMS STARTING EVENING VIS MODERATE OCNL POOR
CENTRAL EAST AREA (40S- 50S AND 20W- 40W) E OF 30W: NW 7/6 GUST WITH 8 INTENSITY
DECR 4/5 WITH GUSTS BY 20/0600 AFTERWARDS SECTOR W 5/6 WITH GUSTS BY 20/1800
PROB OF ISOL RAIN STORMS VIS MODERATE OCNL POOR
N OF 45 - W OF 30W: SECTOR W 5/4 WITH GUSTS INCR 5/6 WITH GUSTS BY 20/0900 PROB
OF RAIN STORMS IMPR STARTING EVENING VIS MODERATE
REST OF THE AREA: SECTOR W 7/6 GUST WITH 8 INTENSITY DECR 5 WITH GUSTS BY
20/0600 PROB OF ISOL SH RAIN VIS GOOD OCNL MODERATE
CENTRAL WEST AREA (40S- 50S AND 40W- 60W) N OF 45 - W OF 50W: SW 4/5 WITH GUSTS
BACK SECTOR E 6/7 GUST WITH 8 INTENSITY BY 20/0600 PROB OF RAIN ISOL SH VIS
MODERATE
REST OF THE AREA: SW 7/6 GUST WITH 8 INTENSITY DECR 5 WITH GUSTS BY 20/1500
PROB OF ISOL RAIN STORMS VIS MODERATE
SOUTH EAST AREA (50S- 60S AND 20W- 40W) N OF 55S: NW 8/7 WITH GUSTS PROB OF ISOL
RAIN VIS POOR OCNL MODERATE
E OF 30 - S OF 55S: SECTOR N 5/6 WITH GUSTS VEER SECTOR W 5/6 WITH GUSTS BY
20/0900 PROB OF ISOL RAIN VIS MODERATE
REST OF THE AREA: SECTOR S 5/6 WITH GUSTS BACK SW 5 WITH GUSTS BY 20/1200 PROB
OF ISOL RAIN VIS MODERATE OCNL GOOD
SOUTH WEST AREA (50S- 60S AND 40W- 60W) E OF 50W: SW 4/5 WITH GUSTS VIS GOOD
REST OF THE AREA: SECTOR S 7/6 GUST WITH 8 INTENSITY VEER SW 5 WITH GUSTS BY
20/1200 PROB OF ISOL RAIN IMPR STARTING EARLY MORNING VIS MODERATE TO GOOD
DRAKE AREA (55S- 60S AND 60W- 67W): SW 4 WITH GUSTS BACK VRB 4/3 BY 20/1800 PROB
OF ISOL RAIN VIS GOOD OCNL MODERATE
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1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
00:00 UTC 20, NOVEMBER 2025.
NATIONAL WEATHER SERVICE (NWS)
SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS
PART 1 GALE WARNING:
1347/2025 STRONG BARIC GRADIENT NORTHER BELLINGSHAUSEN SEA SOUTHERN BELLINGSHAUSEN SEA MOV E DEEPENING PROVOKES WINDS FORCE 8 FROM SECTOR N IN 60S-70S 70W-90W
PART 2 GENERAL SYNOPSIS AT 21:00UTC
LOW 992HPA 64S 90W MOV E DPN EXTENDS CFNT AT 64S 90W 62S 85W 60S 82W
HIGH 1005HPA 65S 75W MOV E INTSF
191400 UTC 1.SEA ICE LIMIT 5811S 02000W 5659S 02620W 5703S 03212W 5717S 03537W 5755S 03800W 5910S 04435W 5848S 04822W 5830S 05140W 6029S 05612W 6234S 06007W 6332S 06233W 6424S 06716W 2.ICEBERGS GREATER THAN 10NM A23A 5243S 04025W 32X24NM A74A 5358S 02803W 27X17NM A77 5427S 04038W 27X4NM A76C 6000S 03833W 16X7NM B15AB 5808S 04610W 11X4NM A23G 5239S 03841W 11X3NM 3.ICEBERGS SMALLER THAN 10NM A23I 4958S 03906W 9X6NM A23J 5126S 03802W 8X2NM ICEBERG1 5058S 03443W 3X1NM ICEBERG2 5525S 04229W 9X2NM ICEBERG3 5134S 03456W 3X1NM ICEBERG4 5224S 03856W 7X3NM ICEBERG5 5100S 04011W 2X2NM ICEBERG6 5217S 03747W 3X1NM ICEBERG7 4955S 02333W 4X2NM ICEBERG8 5222S 03735W 2X1NM ICEBERG9 5156S 03819W 2X1NM ICEBERG10 6048S 04529W 3X2NM ICEBERG11 5057S 03820W 6X2NM ICEBERG12 5156S 03852W 3X3NM ICEBERG13 5321S 03918W 2X2NM ICEBERG14 5304S 03757W 3X3NM ICEBERG15 5123S 03831W 2X1NM ICEBERG16 5140S 03919W 4X2NM ICEBERG17 4953S 02611W 2X1NM ICEBERG18 5249S 03846W 3X1NM ICEBERG19 5245S 03758W 3X1NM ICEBERG20 5244S 03951W 4X1NM ICEBERG21 4947S 03911W 4X4NM ICEBERG22 5758S 04525W 3X1NM ICEBERG23 5320S 03913W 2X1NM 4.ICEBERGS AREA A 5938S 02000W 4500S 02000W 4500S 03510W 5820S 03500W B 5820S 03500W 4700S 03500W 4730S 04450W 6000S 04500W C 6000S 04500W 5500S 04500W 5945S 05620W 6200S 05500W D 6200S 05500W 5945S 05620W 6220S 06716W 6620S 06716W
PART 3 FORECAST ISSUED 00:00 UTC VALID UNTIL 00:00 UTC 2025-11-21
COASTAL AREAS:
SOUTHERN PORTION OF DRAKE STRAIT W OF 60W: W 3/4 PROB OF MIST FOG PATCHES WORSENING TOWARDS MORNING VIS MODERATE TO POOR OCNL VERY POOR
SOUTHERN PORTION OF DRAKE STRAIT REST OF THE AREA: SECTOR S 3/5 PROB OF ISOL SNOW FALL VIS GOOD OCNL MODERATE
MAR DE LA FLOTA COASTS W OF 60W: SECTOR W 3/4 PROB OF MIST FOG PATCHES VIS MODERATE TO POOR OCNL VERY POOR
MAR DE LA FLOTA COASTS REST OF THE AREA: SECTOR S 3/5 PROB OF MIST PROB OFISOL SNOW FALL VIS GOOD OCNL MODERATE
GERLACHE STRAIT : SECTOR E 3/4 BACK SECTOR W 3 PROB OF MIST FOG PATCHES WORSENING TOWARDS MORNING VIS GOOD TO POOR OCNL VERY POOR
MARGARITA BAY : SECTOR N 3/4 VIS GOOD
EREBUS Y TERROR GULF : SECTOR S 3/5 PROB OF MIST STARTING EARLY MORNING IMPR VIS MODERATE TO GOOD
OCEANIC AREAS:
NORTHER BELLINGSHAUSEN SEA (60-66S 70-90W): SECTOR N 8 PROB OF MIST FOG PATCHES PROB OFISOL SNOW FALL VIS MODERATE TO POOR OCNL VERY POOR
SOUTHERN BELLINGSHAUSEN SEA (66-73S 70-90W): SECTOR N 8 PROB OF MIST FOG PATCHES PROB OFISOL SNOW FALL VIS MODERATE TO POOR OCNL VERY POOR
NORTHERN WEDDELL SEA (60-68S 20-50W): SECTOR S 4/5 PROB OF MIST FOG PATCHES PROB OFISOL SNOW FALL VIS MODERATE TO POOR OCNL VERY POOR
SOUTHERN WEDDELL SEA (68-78S 20-60W): SECTOR S 3/4 PROB OF MIST PROB OFISOL SNOW FALL VIS GOOD TO MODERATE OCNL POOR=