Great Falls International to Chicago O'Hare International GTF → ORD

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

• SIGMET C17C: thunderstorms (a convective SIGMET) up to 36,000 ft, moving from the southwest at 40 knots, until 6:55 am MDT (12:55 UTC). Over the route from 420 to 480 nm out.
  as issued

  WSUS32 KKCI 121055
  MKCC WST 121055
  CONVECTIVE SIGMET 17C
  VALID UNTIL 1255Z
  SD ND
  FROM 20NW BIS-60E BIS-20WNW PIR-20SW DPR-20NW BIS
  AREA TS MOV FROM 22040KT. TOPS TO FL360.

• 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 first 689 nm of the route.
• AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the first 200 nm of the route.
• AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 10 to 100 nm out.
• AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 210 to 300 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, 839 nm along 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 GTF.

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

• C340 at 24,000 ft, 14 nm northeast, 4:59 am MDT (10:59 UTC): light to moderate icing, -22 °C. 300 nm along the route, 14 nm northeast of the line.
  as filed, and in English

  DIK UA /OV DIK240054/TM 1059/FL240/TP C340/TA M22/IC LGT-MOD CLR /ZLC

  Report

  a routine report filed through DIK

  Where

  54 nm southwest (240°) of DIK

  Time

  10:59 UTC

  Height

  at 24,000 ft

  Aircraft

  C340

  Temperature

  −22 °C

  Icing

  light to moderate clear zlc

At ORD when you get there the forecast at the estimated arrival, 12:32 pm CDT (17:32 UTC)

Wind from the south-southwest at 13 knots, gusting to 24, visibility more than 6 miles, a few clouds at 25,000 feet VFR

The whole forecast for ORD

• From Mon 7:00 am CDT (12:00 UTC): wind from the south-southwest at 8 knots, visibility more than 6 miles, a broken layer at 25,000 feet
• From Mon 12:00 pm CDT (17:00 UTC): wind from the south-southwest at 13 knots, gusting to 24, visibility more than 6 miles, a few clouds at 25,000 feet
• From Mon 6:00 pm CDT (23:00 UTC): wind from the south-southwest at 12 knots, visibility more than 6 miles, a few clouds at 12,000 feet
• From Mon 10:00 pm CDT (03:00 UTC): wind from the southwest at 11 knots, visibility more than 6 miles, low-level wind shear, a few clouds at 10,000 feet
• From Tue 5:00 am CDT (10:00 UTC): wind from the west at 10 knots, visibility more than 6 miles, a few clouds at 20,000 feet

The forecast for GTF, the departure

• From Mon 6:00 am MDT (12:00 UTC): wind light and variable, visibility 6 miles, mist, overcast at 600 feet
• At times between Mon 6:00 am MDT (12:00 UTC) and 9:00 am MDT (15:00 UTC): visibility 2 miles, light snow, mist, overcast at 400 feet
• From Mon 10:00 am MDT (16:00 UTC): wind light and variable, visibility more than 6 miles, a broken layer at 700 feet
• From Mon 10:00 pm MDT (04:00 UTC): wind from the south-southwest at 6 knots, visibility more than 6 miles, scattered clouds at 500 feet

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

No temporary flight restriction on or near this route right now.

Daylight

Sunset at GTF 6:41 pm MDT (00:41 UTC), at ORD 6:15 pm CDT (23:15 UTC) (civil twilight ends 6:43 pm CDT (23:43 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.