1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
2026-04-22, 12:00 UTC.
NATIONAL WEATHER SERVICE
SEA ICE AND ICEBERGS ISSUED BY SHN
PRESSURE HPA
BEAUFORT SCALE WINDS.
PART 1 GALE WARNING:
WARNING 170: LOW 1008HPA AT 38S 55W MOV SE DEEPENING EXPECTED 46S 50W BY 23/1200
WILL PROVOKE WINDS FORCE 8 FROM SECTOR W WITH GUST BETWEEN 40S-50S 50W-55W FROM
23/0300
WARNING 169: LOW 1008HPA AT 38S 55W MOV SE DEEPENING EXPECTED 46S 50W BY 23/1200
PROVOKES WINDS FORCE 8 FROM NE WITH GUST BETWEEN 40S-50S AND 40W-50W
WARNING 167: LOW 979HPA AT 57S 64W MOV SE DEEPENING PROVOKES WINDS FORCE 8 WITH
GUST IN SOUTH PATAGONIA COASTS FIN DEL MUNDO COASTS DRAKE AREA (55S- 60S AND
60W- 67W) BETWEEN 55S-60S AND 50W-60W UNTIL 23/0300
PART 2 GENERAL SYNOPSIS AT 09:00UTC
221400 UTC 1.SEA ICE LIMIT 6840S 02000W 6828S 02729W 6327S 03132W 6009S 03309W
6059S 03952W 6217S 05036W 6337S 05311W 6313S 05740W 6339S 06042W 6431S 06416W
6601S 06544W 6644S 06716W 2.ICEBERGS GREATER THAN 10NM A76C 5845S 03553W 16X7NM
3.ICEBERGS SMALLER THAN 10NM ICEBERG1 4652S 02859W 6X3NM ICEBERG2 4951S 02816W
5X3NM ICEBERG3 4659S 02857W 4X2NM ICEBERG4 4703S 02903W 3X1NM ICEBERG5 5801S
03613W 3X1NM ICEBERG6 4319S 03357W 2X1NM 4.ICEBERGS AREA A6859S 02000W 4124S
02000W 4307S 03613W 6507S 03625W B6107S 03625W 4305S 03613W 6002S 05503W 6328S
05500W C6328S 05500W 6002S 05503W 6445S 06716W 6638S 06716W
LOW 1008HPA 38S 55W MOV SE DPN EXP 46S 50W BY 23/1200 EXTENDS CFNT AT 38S 55W
36S 53W 35S 53W MOV E ASOCIATED WITH OFNT AT 38S 55W 39S 58W 37S 56W
LOW 979HPA 57S 64W MOV SE DPN EXTENDS CFNT AT 57S 62W 50S 64W 45S 67W MOV E
HIGH 1023HPA 39S 40W MOV SE INTSF EXP 46S 27W BY 23/1200 EXTENDS RIDGE AT 39S
40W 50S 42W 59S 39W MOV E
PART 3 FORECAST ISSUED 12:00 UTC VALID UNTIL 12:00 UTC 2026-04-23
COASTAL AREAS:
INNER RIO DE LA PLATA: SECTOR W 4/3 VIS GOOD
OUTER RIO DE LA PLATA: SECTOR W 5/3 VIS GOOD
URUGUAY SOUTH EAST COASTS: NW 4 BACK SECTOR S 5/3 PROB OF ISOL RAIN IMPR TOWARDS
EARLY MORNING VIS GOOD OCNL MODERATE
MAR DEL PLATA COASTS(3617S - 3830S): SECTOR W 4/6 WITH GUSTS DECR 5 WITH GUSTS
PROB OF ISOL DRIZZLE RAIN IMPR TOWARDS NIGTH VIS MODERATE
RINCON BAHIA BLANCA COASTS(3830S - 41S): SECTOR S 5/6 WITH GUSTS VEER SECTOR W
6/5 WITH GUSTS PROB OF RAIN IMPR TOWARDS NIGTH VIS MODERATE
PENINSULA DE VALDES COASTS(41S - 45S): SECTOR N 5/4 BACK SECTOR S 5/6 WITH
GUSTS PROB OF ISOL RAIN SPELLS OF GOOD WEATHER VIS MODERATE
GOLFO DE SAN JORGE COASTS(45S - 48S): SECTOR N 5/4 BACK SECTOR W 4/6 WITH
GUSTS VIS MODERATE OCNL GOOD
SOUTH PATAGONIA COASTS(48S - 54S): NW 6/8 WITH GUSTS DECR 6/5 WITH GUSTS BY
23/0300 VIS POOR
FIN DEL MUNDO COASTS(54S - 55S): NW 6/8 WITH GUSTS DECR 6/5 WITH GUSTS BY
23/0300 VIS POOR.
ISLAS MALVINAS COASTS: NW 4/5 WITH GUSTS VEER N 6 WITH GUSTS VIS MODERATE
OCEANIC AREAS:
NORTH AREA (35S- 40S AND 20W- 55W) E OF 30W: SECTOR S 5/4 WITH GUSTS PROB OF
ISOL RAIN VIS GOOD OCNL MODERATE
E OF 40W: SECTOR S 3 BACK SECTOR N 3/5 WITH GUSTS PROB OF ISOL RAIN VIS GOOD TO
MODERATE
REST OF THE AREA: NE 5/6 GUST WITH 8 INTENSITY BACK SECTOR W 5/6 WITH GUSTS
PROB OF RAIN STORMS VIS MODERATE OCNL POOR
CENTRAL EAST AREA (40S- 50S AND 20W- 40W) E OF 30W: SECTOR W 6 WITH GUSTS BACK
SECTOR S 6/4 WITH GUSTS PROB OF ISOL RAIN IMPR TOWARDS THE END OF THE PERIOD VIS
MODERATE
REST OF THE AREA: SECTOR S 5/3 BACK SECTOR N 3/6 WITH GUSTS PROB OF ISOL RAIN
SPELLS OF GOOD WEATHER VIS GOOD OCNL MODERATE
CENTRAL WEST AREA (40S- 50S AND 40W- 60W) E OF 50W: N 3/4 VEER NE 6/8 WITH GUSTS
PROB OF RAIN STORMS VIS POOR OCNL VERY POOR
E OF 55W: SECTOR N 4 VEER SECTOR W 5/6 WITH GUSTS INCR 8 WITH GUSTS BY 23/0300
PROB OF RAIN STORMS VIS POOR
REST OF THE AREA: SECTOR N 6/4 WITH GUSTS VEER SECTOR W 6 WITH GUSTS PROB OF
ISOL RAIN IMPR TOWARDS THE END OF THE PERIOD VIS MODERATE OCNL POOR
SOUTH EAST AREA (50S- 60S AND 20W- 40W): SECTOR S 6/5 WITH GUSTS VEER NW WITH
GUSTS PROB OF ISOL RAIN VIS MODERATE
SOUTH WEST AREA (50S- 60S AND 40W- 60W) E OF 50W - S OF 55S: SECTOR N 6 WITH
GUSTS PROB OF ISOL RAIN IMPR TOWARDS EARLY MORNING VIS MODERATE OCNL POOR
W OF 50W - S OF 55S: N 6 WITH GUSTS BACK NW 6/8 WITH GUSTS DECR 6/5 BY 23/0300
PROB OF ISOL RAIN SPELLS OF GOOD WEATHER VIS POOR
REST OF THE AREA: SECTOR N 5/6 WITH GUSTS DECR 4/5 PROB OF RAIN TOWARDS THE END
OF THE PERIOD VIS MODERATE OCNL POOR
DRAKE AREA (55S- 60S AND 60W- 67W): NW 6/8 WITH GUSTS TEMPO DECR 6/5 WITH GUSTS
PROB OF RAIN SNOW FALL SPELLS OF GOOD WEATHER VIS POOR OCNL VERY POOR
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1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
12:00 UTC 22, APRIL 2026.
NATIONAL WEATHER SERVICE (NWS)
SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS
PART 1 GALE WARNING:
561/2026 STRONG BARIC GRADIENT SOUTHERN PORTION OF DRAKE STRAIT MAR DE LA FLOTA COASTS MOV SE DEEPENING PROVOKES WINDS FORCE 8 FROM SECTOR N WITH GUST IN 60S-64S 60W-50W UNTIL 23/0600
562/2026 STRONG BARIC GRADIENT EREBUS Y TERROR GULF MOV E DEEPENING WILL PROVOKE WINDS FORCE 8 FROM SW GUST WITH 9 INTENSITY IN 63S-67S 60W-50W FROM 23/0000 UNTIL 23/1500
563/2026 STRONG BARIC GRADIENT NORTHERN WEDDELL SEA MOV E DEEPENING WILL PROVOKE WINDS FORCE 8 FROM SECTOR N GUST WITH 9 INTENSITY IN 60S-66S 50W-30W FROM 22/1500 UNTIL 23/2100
PART 2 GENERAL SYNOPSIS AT 09:00UTC
LOW 972HPA 60S 75W MOV E DPN
LOW 971HPA 60S 65W MOV SE DPN
LOW 985HPA 71S 57W MOV SE DPN
RIDGE 70S 35W 66S 35W 60S 35W MOV E WKN
221400 UTC 1.SEA ICE LIMIT 6840S 02000W 6828S 02729W 6327S 03132W 6009S 03309W 6059S 03952W 6217S 05036W 6337S 05311W 6313S 05740W 6339S 06042W 6431S 06416W 6601S 06544W 6644S 06716W 2.ICEBERGS GREATER THAN 10NM A76C 5845S 03553W 16X7NM 3.ICEBERGS SMALLER THAN 10NM ICEBERG1 4652S 02859W 6X3NM ICEBERG2 4951S 02816W 5X3NM ICEBERG3 4659S 02857W 4X2NM ICEBERG4 4703S 02903W 3X1NM ICEBERG5 5801S 03613W 3X1NM ICEBERG6 4319S 03357W 2X1NM 4.ICEBERGS AREA A6859S 02000W 4124S 02000W 4307S 03613W 6507S 03625W B6107S 03625W 4305S 03613W 6002S 05503W 6328S 05500W C6328S 05500W 6002S 05503W 6445S 06716W 6638S 06716W
PART 3 FORECAST ISSUED 12:00 UTC VALID UNTIL 12:00 UTC 2026-04-23
COASTAL AREAS:
SOUTHERN PORTION OF DRAKE STRAIT W OF 60W: SECTOR E 3/4 VEER SE 5/6 BY 22/1800 PROB OF FOG AND MIST IN PATCHES PROB OFMOD RAIN SPELLS OF GOOD WEATHER DURING THE EVENING VIS VERY POOR TO MODERATE
SOUTHERN PORTION OF DRAKE STRAIT REST OF THE AREA: NE 5/7 GUST WITH 8 INTENSITY INCR NE 9 BY 22/1800 AFTERWARDS NW 9 WITH GUSTS BY 23/0000 PROB OF MIST PROB OFMOD RAIN IMPR TOWARDS THE END OF THE PERIOD VIS VERY POOR TO MODERATE
MAR DE LA FLOTA COASTS W OF 60W: SECTOR E 3/4 VEER SE 5/6 BY 22/1800 PROB OF FOG AND MIST IN PATCHES PROB OFMOD RAIN SPELLS OF GOOD WEATHER DURING THE EVENING VIS VERY POOR TO MODERATE
MAR DE LA FLOTA COASTS REST OF THE AREA: NE 5/7 GUST WITH 8 INTENSITY INCR NE 9 BY 22/1800 AFTERWARDS NW 9 WITH GUSTS BY 23/0000 PROB OF MIST PROB OFMOD RAIN IMPR TOWARDS THE END OF THE PERIOD VIS VERY POOR TO MODERATE
GERLACHE STRAIT : SECTOR E 3/4 BACK NE 5/4 BY 23/0300 PROB OF MIST PROB OFISOL SNOW FALL IMPR STARTING EARLY MORNING VIS MODERATE TO GOOD
MARGARITA BAY : SECTOR E 8 WITH GUSTS BACK NE 5/4 BY 22/1800 PROB OF MIST PROB OFISOL SNOW FALL IMPR STARTING EVENING VIS MODERATE TO GOOD
EREBUS Y TERROR GULF : NE 6/7 WITH GUSTS VEER SW 9 WITH GUSTS BY 22/2300 PROB OF FOG AND MIST IN PATCHES BLIZZARD PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER TOWARDS THE END OF THE PERIOD VIS VERY POOR TO MODERATE
OCEANIC AREAS:
NORTHER BELLINGSHAUSEN SEA N OF 64S: NE 3/4 VEER SECTOR E 5/6 BY 22/1800 AFTERWARDS SE 5/4 BY 23/0000 PROB OF MIST PROB OFINTERMITTENT RAIN SPELLS OF GOOD WEATHER DURING THE EARLY MORNING VIS POOR TO MODERATE
NORTHER BELLINGSHAUSEN SEA REST OF THE AREA: NW 6/5 WITH GUSTS VEER NE 5/4 BY 22/2100 PROB OF MIST PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER DURING THE EVENING VIS MODERATE TO GOOD
SOUTHERN BELLINGSHAUSEN SEA (66-73S 70-90W): SECTOR E 6/5 DECR NE 4 BY 23/0300 PROB OF FOG AND MIST IN PATCHES PROB OFINTERMITTENT SNOW FALL SPELLS OF GOOD WEATHER TOWARDS THE END OF THE PERIOD VIS VERY POOR TO MODERATE
NORTHERN WEDDELL SEA W OF 40W: SECTOR N 7/8 WITH GUSTS INCR SECTOR N 9 WITH GUSTS BY 22/2100 PROB OF FOG AND MIST IN PATCHES PROB OFINTERMITTENT RAIN AND SNOW MIXTURE WORSENING DURING THE EVENING VIS MODERATE TO VERY POOR
NORTHERN WEDDELL SEA REST OF THE AREA: SECTOR N 4/5 BACK NW 7/8 BY 22/2100 PROB OF FOG AND MIST IN PATCHES WORSENING STARTING NOON VIS MODERATE TO VERY POOR
SOUTHERN WEDDELL SEA (68-78S 20-60W): SECTOR S 4/3 BACK SE 4/5 BY 22/2100 PROB OF MIST PROB OFISOL SNOW FALL IMPR STARTING NOON VIS POOR TO MODERATE OCNL GOOD=