Luis Munoz Marin International to Seattle-Tacoma International SJU → SEA

Warnings the route crosses SIGMETs and AIRMETs whose area the line passes through or comes within 25 nm of

• SIGMET E33E: thunderstorms (a convective SIGMET) up to 45,000 ft, moving from the west at 20 knots, until 7:55 am AST (11:55 UTC). Over the route from 879 to 939 nm out.
  as issued

  WSUS31 KKCI 120955
  MKCE WST 120955
  CONVECTIVE SIGMET 33E
  VALID UNTIL 1155Z
  FL CSTL WTRS
  FROM 220SE CHS-230ENE TRV-90NE PBI-30NE TRV-220SE CHS
  AREA TS MOV FROM 26020KT. TOPS TO FL450.
  REF INTL SIGMET LIMA SERIES.

• AIRMET TANGO 2W: moderate turbulence above 18,000 ft from 28,000 ft to 41,000 ft. Over the route from 1059 to 1169 nm out.
• AIRMET SIERRA 3E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist, fog). Over the route from 1409 to 1509 nm out.
• AIRMET TANGO 2W: low-level wind shear (due to air speed loss or gain of 20 knots or more below 2,000 ft above the ground). Over the route from 1809 to 2298 nm out.
• AIRMET SIERRA 4E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the route from 2258 to 2968 nm out.
• AIRMET TANGO 1W: low-level wind shear (due to air speed loss or gain of 20 knots or more below 2,000 ft above the ground). Over the route from 2408 to 2548 nm out.
• AIRMET TANGO 4W: moderate turbulence above 18,000 ft (due to mountain wave) from 34,000 ft to 43,000 ft. Near the route, 2448 nm along the route.
• AIRMET TANGO 2W: moderate turbulence below 18,000 ft (due to mountain wave) up to 22,000 ft. Near the route, 2508 nm along the route.
• AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 2558 to 2758 nm out.
• AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 2568 to 3028 nm out.
• AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the route from 2768 to 3088 nm out.
• AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the last 390 nm of the route.

A SIGMET warns of weather hazardous to all aircraft; an AIRMET of weather that matters to small aircraft and to flying without instruments. "From 60 to 180 nm out" is measured along the route from SJU.

Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first

Not fetched just now.

At SEA when you get there the forecast at the estimated arrival, 8:01 am PDT (15:01 UTC)

Wind from the south at 4 knots, visibility more than 6 miles, scattered clouds at 25,000 feet VFR

The whole forecast for SEA

• From Mon 2:00 am PDT (09:00 UTC): wind light and variable, visibility more than 6 miles, clear skies
• From Mon 9:00 am PDT (16:00 UTC): wind from the south-southeast at 4 knots, visibility more than 6 miles, clear skies
• From Mon 11:00 am PDT (18:00 UTC): wind from the west at 6 knots, visibility more than 6 miles, clear skies
• From Mon 8:00 pm PDT (03:00 UTC): wind from the south at 4 knots, visibility more than 6 miles, scattered clouds at 25,000 feet

The forecast for SJU, the departure

• From Mon 3:00 am AST (07:00 UTC): wind from the east-southeast at 6 knots, visibility more than 6 miles, light rain showers, thunderstorms nearby, scattered clouds at 2,500 feet (thunderheads), scattered clouds at 5,000 feet
• From Mon 10:00 am AST (14:00 UTC): wind from the east at 11 knots, visibility more than 6 miles, showers nearby, a few clouds at 2,500 feet, scattered clouds at 4,000 feet
• From Mon 1:00 pm AST (17:00 UTC): wind from the east at 13 knots, gusting to 20, visibility more than 6 miles, light rain showers, thunderstorms nearby, scattered clouds at 2,500 feet (thunderheads), a broken layer at 5,000 feet
• From Mon 7:00 pm AST (23:00 UTC): wind from the east-southeast at 6 knots, visibility more than 6 miles, showers nearby, scattered clouds at 3,000 feet, scattered clouds at 6,000 feet

Temporary flight restrictions on the line or within 25 nm of it

• 6/4508 CEIBA, PR 24 nm from the route, at the departure end · security · ZSU
• 6/6783 Perry, GA, Friday, October 9, 2026 through Monday, October 19, 2026 UTC 25 nm from the route, 1269 nm along the route · drones kept away from a public gathering · until 19 October · ZTL

Daylight

Sunset at SJU 6:03 pm AST (22:03 UTC), at SEA 6:25 pm PDT (01:25 UTC) (civil twilight ends 6:56 pm PDT (01:56 UTC)).

Each restriction opens the FAA's own page with the exact area, heights and times. Ordinary notices to air missions (closed runways, lights out) are not shown: the FAA's notice search is not open to sites like this one at this time.