1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
2026-04-17, 12:00 UTC.
NATIONAL WEATHER SERVICE
SEA ICE AND ICEBERGS ISSUED BY SHN
PRESSURE HPA
BEAUFORT SCALE WINDS.
PART 1 GALE WARNING:
WARNING 164: LOW 987HPA AT 55S 63W MOV SE DEEPENING WILL PROVOKE WINDS FORCE 8
FROM SECTOR W WITH GUST IN DRAKE AREA (55S- 60S AND 60W- 67W) BETWEEN 55S-60S
AND 40W-60W FROM 17/1800
WARNING 161: STRONG BARIC GRADIENT PROVOKES WINDS FORCE 8 FROM SECTOR E WITH
GUST BETWEEN 40S-45S AND 20W-30W
PART 2 GENERAL SYNOPSIS AT 09:00UTC
LOW 1002HPA 36S 53W MOV E NC EXP 36S 50W BY 18/1200 EXTENDS OFNT AT 36S 50W 35S
57W 33S 55W
LOW 987HPA 55S 63W MOV SE DPN EXTENDS CFNT AT 55S 63W 47S 60W 39S 61W MOV E
HIGH 1031HPA 51S 26W MOV E INTSF EXP 50S 22W BY 18/1200
161400 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 5920S 03602W 16X7NM
3.ICEBERGS SMALLER THAN 10NM ICEBERG1 4640S 02749W 6X3NM ICEBERG2 4903S 03023W
5X3NM ICEBERG3 4629S 02736W 4X2NM ICEBERG4 4656S 02738W 3X1NM ICEBERG5 5825S
03611W 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 2026-04-18
COASTAL AREAS:
INNER RIO DE LA PLATA: SW 3 VEER W 3 PROB OF DRIZZLE TOWARDS MORNING VIS GOOD
OCNL MODERATE TO GOOD
OUTER RIO DE LA PLATA: SECTOR S 4 PROB OF ISOL RAIN TOWARDS EVENING IMPR VIS
GOOD OCNL MODERATE TO GOOD
URUGUAY SOUTH EAST COASTS: SECTOR S 4 WITH GUSTS PROB OF ISOL RAIN SPELLS OF
GOOD WEATHER VIS MODERATE
MAR DEL PLATA COASTS(3617S - 3830S): SECTOR S 4/6 PROB OF ISOL RAIN DURING THE
MORNING VIS GOOD OCNL MODERATE
RINCON BAHIA BLANCA COASTS(3830S - 41S): SECTOR N 4/3 PROB OF ISOL RAIN VIS
GOOD OCNL MODERATE
PENINSULA DE VALDES COASTS(41S - 45S): SECTOR W 3 BACK SECTOR E 3/4 PROB OF
ISOL RAIN STARTING EVENING IMPR VIS GOOD OCNL MODERATE
GOLFO DE SAN JORGE COASTS(45S - 48S): SECTOR W 4 BACK SECTOR N 4/5 WITH GUSTS
VIS GOOD OCNL MODERATE
SOUTH PATAGONIA COASTS(48S - 54S): SECTOR W 4 BACK SECTOR N 5/6 WITH GUSTS VIS
GOOD OCNL MODERATE
FIN DEL MUNDO COASTS(54S - 55S): SECTOR W 3/5 BACK SECTOR N 5/6 WITH GUSTS VIS
GOOD OCNL MODERATE
ISLAS MALVINAS COASTS: SECTOR N 4/5 WITH GUSTS TEMPO VEER SECTOR W 3/4 PROB OF
ISOL RAIN STARTING EARLY MORNING VIS MODERATE
OCEANIC AREAS:
NORTH AREA (35S- 40S AND 20W- 55W) E OF 30W: NW 6/4 GUST WITH 8 INTENSITY PROB
OF ISOL RAIN STORMS VIS MODERATE OCNL POOR
E OF 40W: SECTOR S 4/5 WITH GUSTS PROB OF ISOL RAIN STORMS VIS MODERATE OCNL
POOR
REST OF THE AREA: SECTOR E 5/6 GUST WITH 8 INTENSITY PROB OF ISOL RAIN STORMS
VIS MODERATE OCNL POOR
CENTRAL EAST AREA (40S- 50S AND 20W- 40W) N OF 45 - E OF 30W: SECTOR E 6/8 WITH
GUSTS PROB OF ISOL RAIN VIS POOR OCNL VERY POOR
REST OF THE AREA: SECTOR E 5/6 WITH GUSTS PROB OF ISOL RAIN VIS MODERATE OCNL
POOR
CENTRAL WEST AREA (40S- 50S AND 40W- 60W) N OF 45S: SECTOR N 4/5 WITH GUSTS VEER
SECTOR E 5 PROB OF ISOL RAIN STORMS VIS MODERATE OCNL POOR
REST OF THE AREA: SECTOR N 5/4 WITH GUSTS PROB OF ISOL SH RAIN VIS MODERATE
OCNL POOR
SOUTH EAST AREA (50S- 60S AND 20W- 40W) E OF 30W: SECTOR W 4/5 WITH GUSTS VIS
GOOD OCNL MODERATE
REST OF THE AREA: SECTOR N 5/6 WITH GUSTS PROB OF ISOL RAIN STARTING EVENING
VIS MODERATE OCNL POOR
SOUTH WEST AREA (50S- 60S AND 40W- 60W) N OF 55S: SECTOR N 6/4 WITH GUSTS PROB
OF RAIN SPELLS OF GOOD WEATHER VIS MODERATE OCNL POOR
E OF 50 - S OF 55S: SECTOR N 5/6 WITH GUSTS BACK SECTOR W 6/8 WITH GUSTS BY
18/0000 DECR 5 PROB OF RAIN VIS MODERATE TO POOR OCNL VERY POOR
REST OF THE AREA: SECTOR N 6 GUST WITH 8 INTENSITY VEER SECTOR W 8 WITH GUSTS
BY 17/1800 VEER SECTOR N 4/5 WITH GUSTS PROB OF RAIN TOWARDS EARLY MORNING IMPR
VIS POOR OCNL VERY POOR
DRAKE AREA (55S- 60S AND 60W- 67W): SECTOR S 5 WITH GUSTS VEER SECTOR W 6/8 WITH
GUSTS DECR SECTOR N 5/6 WITH GUSTS PROB OF RAIN SPELLS OF GOOD WEATHER VIS POOR
OCNL VERY POOR
-----------------------------------------------------------------
NNNN=
1:31:06:01:00
SECURITE
WEATHER BULLETIN FOR SHIPPING - METAREA 6-
12:00 UTC 17, APRIL 2026.
NATIONAL WEATHER SERVICE (NWS)
SEA ICE AND ICEBERGS ISSUED BY SHN PRESSURE HPA BEAUFORT SCALE WINDS
PART 1 GALE WARNING:
534/2026 STRONG BARIC GRADIENT NORTHERN WEDDELL SEA MOV SE DEEPENING PROVOKES WINDS FORCE 8 GUST WITH 9 INTENSITY IN 60S-67S 50W-30W UNTIL 17/1500
535/2026 STRONG BARIC GRADIENT SOUTHERN PORTION OF DRAKE STRAIT MAR DE LA FLOTA COASTS MOV SE DEEPENING PROVOKES WINDS FORCE 8 FROM SECTOR N GUST WITH 9 INTENSITY IN 60S-64S 59W-50W UNTIL 18/1800
536/2026 STRONG BARIC GRADIENT NORTHERN WEDDELL SEA MOV E DEEPENING WILL PROVOKE WINDS FORCE 9 FROM SECTOR N GUST WITH 10 INTENSITY IN 60S-65S 50W-40W FROM 18/0000 UNTIL 18/1800
PART 2 GENERAL SYNOPSIS AT 09:00UTC
LOW 969HPA 68S 80W MOV SE DPN
LOW 980HPA 62S 84W MOV E WKN
LOW 978HPA 72S 40W MOV SE DPN
RIDGE 70S 57W 65S 50W 60S 44W MOV E INTSF
161400 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 5920S 03602W 16X7NM 3.ICEBERGS SMALLER THAN 10NM ICEBERG1 4640S 02749W 6X3NM ICEBERG2 4903S 03023W 5X3NM ICEBERG3 4629S 02736W 4X2NM ICEBERG4 4656S 02738W 3X1NM ICEBERG5 5825S 03611W 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 2026-04-18
COASTAL AREAS:
SOUTHERN PORTION OF DRAKE STRAIT W OF 60W: NW 3/4 VEER NE 4/5 BY 18/0000 AFTERWARDS NE 6/7 WITH GUSTS BY 18/0600 PROB OF FOG AND MIST IN PATCHES IMPR TOWARDS NIGTH VIS VERY POOR TO MODERATE OCNL GOOD
SOUTHERN PORTION OF DRAKE STRAIT REST OF THE AREA: NE 5/6 WITH GUSTS VEER SECTOR E 7 GUST WITH 8 INTENSITY BY 17/2100 PROB OF FOG MIST PROB OFINTERMITTENT RAIN AND SNOW MIXTURE IMPR DURING THE EARLY MORNING VIS VERY POOR TO MODERATE
MAR DE LA FLOTA COASTS W OF 60W: NW 3/4 VEER NE 4/5 BY 18/0000 AFTERWARDS NE 6/7 WITH GUSTS BY 18/0600 PROB OF FOG AND MIST IN PATCHES IMPR TOWARDS NIGTH VIS VERY POOR TO MODERATE OCNL GOOD
MAR DE LA FLOTA COASTS REST OF THE AREA: NE 5/6 WITH GUSTS VEER SECTOR E 7 GUST WITH 8 INTENSITY BY 17/2100 PROB OF FOG MIST PROB OFINTERMITTENT RAIN AND SNOW MIXTURE IMPR DURING THE EARLY MORNING VIS VERY POOR TO MODERATE
GERLACHE STRAIT : NE 4/5 WITH GUSTS VEER SECTOR E 3/4 BY 17/1800 PROB OF MIST PROB OFISOL SNOW FALL SPELLS OF GOOD WEATHER TOWARDS THE END OF THE PERIOD VIS MODERATE TO GOOD
MARGARITA BAY : NE 4/5 BACK SECTOR N 5/6 WITH GUSTS BY 17/1800 VIS GOOD
EREBUS Y TERROR GULF : SW 4/5 WITH GUSTS VEER NW 5 WITH GUSTS BY 18/0600 PROB OF FOG AND MIST IN PATCHES PROB OFISOL SNOW FALL SPELLS OF GOOD WEATHER DURING THE EARLY MORNING VIS VERY POOR TO MODERATE OCNL GOOD
OCEANIC AREAS:
NORTHER BELLINGSHAUSEN SEA N OF 65S: NW 4/5 BACK SW 4/4 WITH GUSTS BY 17/1800 PROB OF MIST PROB OFSCT SH SPELLS OF GOOD WEATHER DURING THE EVENING VIS MODERATE TO GOOD
NORTHER BELLINGSHAUSEN SEA REST OF THE AREA: SECTOR N 6/5 BACK SECTOR W 6/5 WITH GUSTS BY 17/1800 PROB OF MIST PROB OFISOL SNOW FALL IMPR DURING THE EVENING VIS VERY POOR TO MODERATE OCNL GOOD
SOUTHERN BELLINGSHAUSEN SEA (66-73S 70-90W): SE 4/5 VEER SECTOR S 4/3 BY 17/2100 PROB OF MIST PROB OFISOL SNOW FALL IMPR DURING THE NIGTH VIS POOR TO MODERATE OCNL GOOD
NORTHERN WEDDELL SEA N OF 65S: NW 7 WITH GUSTS VEER SECTOR N 8 BY 18/0000 PROB OF FOG MIST PROB OFISOL RAIN AND SNOW MIXTURE IMPR TOWARDS THE END OF THE PERIOD VIS VERY POOR TO MODERATE
NORTHERN WEDDELL SEA REST OF THE AREA: NW 5/7 WITH GUSTS BACK NE 4/3 BY 17/2100 PROB OF FOG AND MIST IN PATCHES PROB OFINTERMITTENT SNOW FALL WORSENING STARTING NIGTH VIS MODERATE TO VERY POOR
SOUTHERN WEDDELL SEA (68-78S 20-60W): SE 7/8 WITH GUSTS DECR SE 6/5 WITH GUSTS BY 17/1800 PROB OF MIST PROB OFMOD SNOW FALL SPELLS OF GOOD WEATHER DURING THE EVENING VIS VERY POOR TO MODERATE=