General Edward Lawrence Logan International to Boise Air Trml/Gowen Field BOS → BOI

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

• SIGMET 1C: thunderstorms (a convective SIGMET) up to 30,000 ft, moving from the southwest at 40 knots, until 12:55 am EDT (04:55 UTC). Over the route from 1405 to 1495 nm out.
  as issued

  WSUS32 KKCI 120255
  MKCC WST 120255
  CONVECTIVE SIGMET 1C
  VALID UNTIL 0455Z
  SD ND MT WY
  FROM 30WSW DIK-50NW DPR-60WNW RAP-50ENE SHR-30WSW DIK
  AREA TS MOV FROM 22040KT. 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 25,000 ft. Over the first 259 nm of the route.
• AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the first 299 nm of the route.
• AIRMET TANGO 2W: moderate turbulence below 18,000 ft up to 13,000 ft. Over the first 169 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 219 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 1096 to 1186 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 1266 to 1903 nm out.
• AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 1455 to 1654 nm out.
• AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 1515 to 1744 nm out.
• AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1565 to 1943 nm out.
• AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the last 389 nm of the route.
• 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 1604 to 1684 nm out.
• AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 1834 to 1893 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 BOS.

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

Not fetched just now.

At BOI when you get there the forecast at the estimated arrival, 3:00 pm MDT (21:00 UTC)

BOI 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 18 nm from the route, at the departure end · drones kept away from a public gathering · starts Saturday 17 October · ZBW
• 6/6656 ANOKA, MN, Monday, October 5, 2026 through Monday, October 19, 2026 Local 5 nm from the route, 977 nm along the route · security · until 19 October · ZMP

Daylight

Sunset at BOS 6:07 pm EDT (22:07 UTC), at BOI 7:06 pm MDT (01:06 UTC) (civil twilight ends 7:35 pm MDT (01:35 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.