Severe Thunderstorms and Flooding from the Southern Plains to the Great Lakes; Record Heat in the East

Widely scattered severe thunderstorms may produce damaging winds, hail, and flash flooding from the southern Plains into the lower Great Lakes. Elevated to locally critical fire weather conditions will persist across portions of the Southwest and Southern High Plains due to gusty winds and dry conditions. An early-season heatwave will challenge temperature records across the eastern U.S.. Read More >

Current conditions at

Challis - Challis Airport (KLLJ)

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

Mostly Cloudy

61°F

16°C

Humidity 18%
Wind Speed NW 9 MPH
Barometer 30.05 in (1017.61 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Last update 19 May 07:20 PM MDT
Extended Forecast for

23 Miles NNW Mackay ID

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 31. West wind 5 to 8 mph becoming calm  in the evening.

    Low: 31 °F

    Decreasing
    Clouds

  • Wednesday

    Wednesday: Partly sunny, with a high near 52. Light and variable wind becoming west northwest 5 to 10 mph in the afternoon.

    High: 52 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Snow likely, possibly mixed with rain. Some thunder is also possible.  Mostly cloudy, with a low around 34. North wind 7 to 9 mph, with gusts as high as 18 mph.  Chance of precipitation is 60%. Little or no snow accumulation expected.

    Low: 34 °F

    Rain/Snow
    Likely

  • Thursday

    Thursday: Cloudy, then gradually becoming mostly sunny, with a high near 50. North wind 8 to 14 mph, with gusts as high as 24 mph.

    High: 50 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 34. North wind 5 to 10 mph becoming light and variable  in the evening.

    Low: 34 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 57.

    High: 57 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 35.

    Low: 35 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 40.

    Low: 40 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 31. West wind 5 to 8 mph becoming calm in the evening.
Wednesday
Partly sunny, with a high near 52. Light and variable wind becoming west northwest 5 to 10 mph in the afternoon.
Wednesday Night
Snow likely, possibly mixed with rain. Some thunder is also possible. Mostly cloudy, with a low around 34. North wind 7 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Thursday
Cloudy, then gradually becoming mostly sunny, with a high near 50. North wind 8 to 14 mph, with gusts as high as 24 mph.
Thursday Night
Partly cloudy, with a low around 34. North wind 5 to 10 mph becoming light and variable in the evening.
Friday
Mostly sunny, with a high near 57.
Friday Night
Partly cloudy, with a low around 35.
Saturday
Sunny, with a high near 63.
Saturday Night
Partly cloudy, with a low around 40.
Sunday
Mostly sunny, with a high near 67.
Sunday Night
Mostly clear, with a low around 41.
Memorial Day
Sunny, with a high near 66. Windy.
Monday Night
Partly cloudy, with a low around 37. Breezy.
Tuesday
A 20 percent chance of rain. Mostly sunny, with a high near 59.
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ABOUT THIS FORECAST

 
Point Forecast:
23 Miles NNW Mackay ID
 44.2°N 113.86°W (Elev. 7402 ft)
5:31 pm MDT May 19, 2026
7pm MDT May 19, 2026-6pm MDT May 26, 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