Chicago O'Hare International to Helena Regional ORD → HLN

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

• SIGMET C16C: thunderstorms (a convective SIGMET) up to 36,000 ft, moving from the southwest at 40 knots, until 6:55 am CDT (11:55 UTC). Over the route from 588 to 638 nm out.
  as issued

  WSUS32 KKCI 120955
  MKCC WST 120955
  CONVECTIVE SIGMET 16C
  VALID UNTIL 1155Z
  SD ND
  FROM BIS-60NNW ABR-40SSE DPR-50NNW DPR-BIS
  AREA TS MOV FROM 22040KT. TOPS TO FL360.

• 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 189 to 229 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 last 708 nm of the route.
• AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 768 to 867 nm out.
• AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the last 189 nm of the route.
• AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the last 160 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 ORD.

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

• B77W at 30,000 ft, 41 nm north, 3:00 am CDT (08:00 UTC): light to moderate chop turbulence. 498 nm along the route, 41 nm north of the line.
  as filed, and in English

  ABR UA /OV ABR/TM 0800/FL300/TP B77W/TB LGT-MOD CHOP

  Report

  a routine report filed through ABR

  Where

  over ABR

  Time

  08:00 UTC

  Height

  at 30,000 ft

  Aircraft

  B77W

  Turbulence

  light to moderate chop

At HLN when you get there the forecast at the estimated arrival, 2:33 pm MDT (20:33 UTC)

Wind light and variable, visibility more than 6 miles, overcast at 1,500 feet marginal VFR

The whole forecast for HLN

• From Mon 12:00 am MDT (06:00 UTC): wind from the west-northwest at 14 knots, visibility 3 miles, light snow, overcast at 3,500 feet
• At times between Mon 12:00 am MDT (06:00 UTC) and 3:00 am MDT (09:00 UTC): visibility 1 mile, light snow, overcast at 1,500 feet
• From Mon 3:00 am MDT (09:00 UTC): wind light and variable, visibility more than 6 miles, overcast at 1,500 feet
• 30% chance between Mon 3:00 am MDT (09:00 UTC) and 6:00 am MDT (12:00 UTC): visibility 3 miles, light snow, overcast at 1,000 feet
• From Mon 3:00 pm MDT (21:00 UTC): wind light and variable, visibility more than 6 miles, scattered clouds at 1,500 feet, scattered clouds at 3,500 feet

The forecast for ORD, the departure

• From Mon 4:00 am CDT (09:00 UTC): wind from the south-southwest at 6 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 southwest at 12 knots, visibility more than 6 miles, a few clouds at 12,000 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 ORD 6:15 pm CDT (23:15 UTC), at HLN 6:45 pm MDT (00:45 UTC) (civil twilight ends 7:15 pm MDT (01:15 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.