Thunderstorms and Heavy Rainfall in the Plains; Hazardous Heat in the South and Southeast

Severe thunderstorms will be possible across the northern/central Plains through Tuesday afternoon and from the central Plains to the Mid-Mississippi Valley Tuesday evening through Wednesday morning. Storms may produce large hail and damaging wind gusts, and heavy rainfall may lead to scattered instances of flash flooding. Meanwhile, hazardous heat persists across the South and Southeast. Read More >

Current conditions at

Challis - Challis Airport (KLLJ)

Lat: 44.523°NLon: 114.21611°WElev: 5026.0ft.

Partly Cloudy

64°F

18°C

Humidity 48%
Wind Speed N 0 MPH
Barometer 30.17 in (1021.67 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 18 Aug 01:20 AM MDT
Extended Forecast for

22 Miles NNE Mackay ID

  • Overnight

    Overnight: Mostly cloudy, with a low around 52. West southwest wind around 5 mph.

    Low: 52 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A slight chance of showers and thunderstorms between 3pm and 5pm.  Partly sunny, with a high near 64. Light and variable wind becoming west northwest 8 to 13 mph in the afternoon. Winds could gust as high as 20 mph.  Chance of precipitation is 20%.

    High: 64 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain before 7pm.  Mostly clear, with a low around 49. West northwest wind 5 to 11 mph, with gusts as high as 18 mph.

    Low: 49 °F

    Slight Chance
    Rain then
    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 67. West northwest wind 3 to 8 mph.

    High: 67 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 53. West northwest wind 5 to 7 mph.

    Low: 53 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 71.

    High: 71 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 57.

    Low: 57 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 72.

    High: 72 °F

    Partly Sunny

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms before midnight.  Mostly cloudy, with a low around 57.

    Low: 57 °F

    Chance
    Showers then
    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 52. West southwest wind around 5 mph.
Tuesday
A slight chance of showers and thunderstorms between 3pm and 5pm. Partly sunny, with a high near 64. Light and variable wind becoming west northwest 8 to 13 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 20%.
Tuesday Night
A 20 percent chance of rain before 7pm. Mostly clear, with a low around 49. West northwest wind 5 to 11 mph, with gusts as high as 18 mph.
Wednesday
Sunny, with a high near 67. West northwest wind 3 to 8 mph.
Wednesday Night
Mostly clear, with a low around 53. West northwest wind 5 to 7 mph.
Thursday
Sunny, with a high near 71.
Thursday Night
Partly cloudy, with a low around 57.
Friday
Partly sunny, with a high near 72.
Friday Night
A 40 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 57.
Saturday
A 50 percent chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 66.
Saturday Night
A 20 percent chance of rain. Partly cloudy, with a low around 51.
Sunday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 64.
Sunday Night
A 20 percent chance of rain. Partly cloudy, with a low around 50.
Monday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 63.
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ABOUT THIS FORECAST

 
Point Forecast:
22 Miles NNE Mackay ID
 44.21°N 113.5°W (Elev. 8839 ft)
12:31 am MDT Aug 18, 2026
1am MDT Aug 18, 2026-6pm MDT Aug 24, 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