Boeing Fld/King County International to John F Kennedy International BFI → JFK

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

• SIGMET E19E: thunderstorms (a convective SIGMET) up to 43,000 ft, moving from the southwest at 20 knots, until 11:55 pm PDT (06:55 UTC). Over the last 20 nm of the route.
  as issued

  WSUS31 KKCI 120455
  MKCE WST 120455
  CONVECTIVE SIGMET 19E
  VALID UNTIL 0655Z
  CT NY NJ PA DE MD VA DC WV AND DE NJ NY MD CT VA CSTL WTRS
  FROM 20NNW HTO-70SSE HTO-90SE SIE-20WNW LYH-40ESE AIR-20NNW HTO
  AREA EMBD TS MOV FROM 24020KT. TOPS TO FL430.

• AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the first 190 nm of the route.
• AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 130 to 689 nm out.
• AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 250 to 400 nm out.
• AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 280 to 469 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 350 to 1119 nm out.
• AIRMET ZULU 2C: moderate icing up to 23,000 ft. Near the route, 679 nm along the route.
• AIRMET TANGO 3W: 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 1319 to 1408 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). Over the last 529 nm of the route.
• AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1868 to 2018 nm out.
• AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the last 210 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 BFI.

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

• urgent B39M at 35,000 ft, 25 nm south, 8:15 pm PDT (03:15 UTC): remarks: no inj/dmg zob. 1788 nm along the route, 25 nm south of the line.
  as filed, and in English

  DKK UUA /OV DKK280040/TM 0315/FL350/TP B39M/TB MTN WVE ACTN +/-5KTS/RM NO INJ/DMG ZOB

  Report

  an urgent report filed through DKK

  Where

  40 nm west (280°) of DKK

  Time

  03:15 UTC

  Height

  at 35,000 ft

  Aircraft

  B39M

  Turbulence

  mountain wve actn a 5-knot loss of airspeed

  Remarks

  no inj/dmg zob

• GA6C descending, 36 nm northeast, 9:32 pm PDT (04:32 UTC): overcast above 1,000 ft, remarks: bases OVC010. At the destination end, 36 nm northeast of the line.
  as filed, and in English

  SWF UA /OV SWF 270005/TM 0432/FLDURD/TP GA6C/SK OVC010/RM BASES OVC010

  Report

  a routine report filed through SWF

  Where

  5 nm west (270°) of SWF

  Time

  04:32 UTC

  Height

  during the descent

  Aircraft

  GA6C

  Sky

  overcast from 1,000 ft

  Remarks

  bases OVC010

At JFK when you get there the forecast at the estimated arrival, 2:22 pm EDT (18:22 UTC)

Wind from the north-northwest at 10 knots, visibility more than 6 miles, a few clouds at 2,500 feet, scattered clouds at 5,000 feet VFR

The whole forecast for JFK

• From Mon 2:00 am EDT (06:00 UTC): wind from the north-northeast at 13 knots, visibility more than 6 miles, showers nearby, overcast at 800 feet
• From Mon 8:00 am EDT (12:00 UTC): wind from the north at 12 knots, visibility more than 6 miles, a broken layer at 800 feet, overcast at 1,500 feet
• From Mon 11:00 am EDT (15:00 UTC): wind from the north at 11 knots, visibility more than 6 miles, a broken layer at 2,500 feet
• From Mon 2:00 pm EDT (18:00 UTC): wind from the north-northwest at 10 knots, visibility more than 6 miles, a few clouds at 2,500 feet, scattered clouds at 5,000 feet
• From Mon 5:00 pm EDT (21:00 UTC): wind from the northwest at 9 knots, visibility more than 6 miles, a few clouds at 5,000 feet
• From Mon 11:00 pm EDT (03:00 UTC): wind from the north-northwest at 4 knots, visibility more than 6 miles, a few clouds at 5,000 feet, a few clouds at 15,000 feet

The forecast for BFI, the departure

• From Sun 11:00 pm PDT (06:00 UTC): wind calm, visibility more than 6 miles, clear skies
• From Mon 3:00 am PDT (10:00 UTC): wind calm, visibility more than 6 miles, patches of fog, clear skies
• From Mon 9:00 am PDT (16:00 UTC): wind from the south-southeast at 3 knots, visibility more than 6 miles, clear skies
• From Mon 12:00 pm PDT (19:00 UTC): wind from the west-southwest at 3 knots, visibility more than 6 miles, clear skies
• From Mon 2:00 pm PDT (21:00 UTC): wind from the west at 5 knots, visibility more than 6 miles, clear skies
• From Mon 7:00 pm PDT (02:00 UTC): wind calm, visibility more than 6 miles, clear skies

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

• 5/2811 NEW YORK, NY, Monday, October 20, 2025 through Tuesday, October 20, 2026 Local 2 nm from the route, at the destination end · security · until 20 October · ZNY

Daylight

Sunset at BFI 6:27 pm PDT (01:27 UTC), at JFK 6:19 pm EDT (22:19 UTC) (civil twilight ends 6:47 pm EDT (22:47 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.