Tracking Late December Winter Storm Expected to Impact the Northern Plains through the Northeast U.S.

A winter storm system will rapidly intensify over the Midwest on Sunday and track through the Great Lakes on Monday. Periods of heavy snow are anticipated across the Upper Great Lakes late Sunday and continuing into Monday. At least 1/10 inch of ice accumulation is expected from a wintry mix across much of the interior Northeast U.S. starting Sunday afternoon. Read More >

Current conditions at

Hailey, Friedman Memorial Airport (KSUN)

Lat: 43.5°NLon: 114.3°WElev: 5318.0ft.

Clear

18°F

-8°C

Humidity 67%
Wind Speed N 9 MPH
Barometer 30.27 in (1025.06 mb)
Dewpoint 8°F (-13°C)
Visibility 10.00 mi
Wind Chill7°F (-14°C)
Last update 28 Dec 03:15 AM MST
Extended Forecast for

Arco ID

  • Overnight

    Overnight: Mostly clear, with a steady temperature around 12. North northwest wind around 6 mph.

    Low: 12 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 25. North northwest wind around 5 mph becoming calm.

    High: 25 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 10. Light and variable wind.

    Low: 10 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 27. Light and variable wind.

    High: 27 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 15. Light and variable wind.

    Low: 15 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 33.

    High: 33 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 17.

    Low: 17 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 36.

    High: 36 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 19.

    Low: 19 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a steady temperature around 12. North northwest wind around 6 mph.
Sunday
Sunny, with a high near 25. North northwest wind around 5 mph becoming calm.
Sunday Night
Mostly clear, with a low around 10. Light and variable wind.
Monday
Sunny, with a high near 27. Light and variable wind.
Monday Night
Mostly clear, with a low around 15. Light and variable wind.
Tuesday
Sunny, with a high near 33.
Tuesday Night
Mostly clear, with a low around 17.
Wednesday
Sunny, with a high near 36.
Wednesday Night
Partly cloudy, with a low around 19.
New Year's Day
Partly sunny, with a high near 37.
Thursday Night
Mostly cloudy, with a low around 21.
Friday
A 30 percent chance of snow. Mostly cloudy, with a high near 38.
Friday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 20.
Saturday
A 30 percent chance of snow. Partly sunny, with a high near 35.
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ABOUT THIS FORECAST

 
Point Forecast:
Arco ID
 43.64°N 113.3°W (Elev. 6066 ft)
3:25 am MST Dec 28, 2025
3am MST Dec 28, 2025-6pm MST Jan 3, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database