Laurence G Hanscom Field to San Francisco International BED → SFO

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

• SIGMET W70W: thunderstorms (a convective SIGMET) up to 32,000 ft, moving from the southwest at 40 knots, until 9:55 pm EDT (01:55 UTC). Over the route from 1534 to 1663 nm out.
  as issued

  WSUS33 KKCI 112355
  MKCW WST 112355
  CONVECTIVE SIGMET 70W
  VALID UNTIL 0155Z
  MT WY
  FROM 30SSW MLS-60WNW BFF-40SSE OCS-10S BPI-10S BIL-30SSW MLS
  AREA TS MOV FROM 22040KT. TOPS TO FL320.

• SIGMET W71W: thunderstorms (a convective SIGMET) up to 27,000 ft, moving from the south at 40 knots, until 9:55 pm EDT (01:55 UTC). Over the route from 1763 to 1872 nm out.
  as issued

  WSUS33 KKCI 112355
  MKCW WST 112355
  CONVECTIVE SIGMET 71W
  VALID UNTIL 0155Z
  WY UT ID
  FROM 40S DBS-40WNW BPI-30WSW MTU-30SSW DTA-30SE TWF-40S DBS
  AREA EMBD TS MOV FROM 20040KT. TOPS TO FL270.

• SIGMET W72W: thunderstorms (a convective SIGMET) up to 30,000 ft, moving from the southwest at 20 knots, until 9:55 pm EDT (01:55 UTC). Over the route from 2042 to 2101 nm out.
  as issued

  WSUS33 KKCI 112355
  MKCW WST 112355
  CONVECTIVE SIGMET 72W
  VALID UNTIL 0155Z
  NV
  FROM 60SSW BAM-60W ELY-OAL-40WNW OAL-60SSW BAM
  AREA TS MOV FROM 23020KT. TOPS TO FL300.

• 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 first 528 nm of the route.
• AIRMET ZULU 1C: moderate icing up to 24,000 ft. Over the first 319 nm of the route.
• AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the first 319 nm of the route.
• AIRMET TANGO 2W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the first 339 nm of the route.
• AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 70 to 229 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). Near the route, 239 nm along the route.
• AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 1364 to 2022 nm out.
• AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 1484 to 1862 nm out.
• AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1544 to 2012 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 1554 to 1823 nm out.
• AIRMET TANGO 5W: strong surface winds (30 knots or more) (due to sustained surface winds greater than 30 knots). Over the route from 1613 to 1673 nm out.
• AIRMET ZULU 3C: moderate icing up to 22,000 ft. Over the route from 1693 to 2092 nm out.
• AIRMET SIERRA 2E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the route from 1793 to 1823 nm out.
• AIRMET TANGO 3W: moderate turbulence below 18,000 ft (due to mountain wave) up to 15,000 ft. Over the route from 2141 to 2211 nm out.

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 BED.

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

Not fetched just now.

At SFO when you get there the forecast at the estimated arrival, 1:15 pm PDT (20:15 UTC)

SFO has no terminal forecast; use the nearest airport that does.

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

• 6/8802 Foxborough, MA, Saturday, October 17, 2026 through Sunday, October 18, 2026 UTC 22 nm from the route, at the departure end · drones kept away from a public gathering · starts Saturday 17 October · ZBW
• 6/6740 SACRAMENTO, CA, Thursday, October 8, 2026 through Sunday, October 11, 2026 Local 24 nm from the route, at the destination end · air shows/sports · ended 11 October · ZOA
• 6/7231 Santa Clara, CA, Sunday, October 11, 2026 through Monday, October 12, 2026 UTC 19 nm from the route, at the destination end · drones kept away from a public gathering · until 12 October · ZOA
• 6/7455 SAN FRANCISCO, CA, Thursday, October 8, 2026 through Sunday, October 11, 2026 Local 10 nm from the route, at the destination end · security · ended 11 October · ZOA
• 6/6741 SAN FRANCISCO, CA, Thursday, October 8, 2026 through Sunday, October 11, 2026 Local 7 nm from the route, at the destination end · air shows/sports · ended 11 October · ZOA

Daylight

Sunset at BED 6:08 pm EDT (22:08 UTC), at SFO 6:36 pm PDT (01:36 UTC) (civil twilight ends 7:02 pm PDT (02:02 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.