National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Heat Builds in the West; Extremely Critical Fire Weather in the Northwest

A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Critical to extremely critical fire weather conditions are forecast from the Northwest and the northern Great Basin this weekend. Particularly Dangerous Situation Red Flag Warnings have been issued. Read More >

Hazardous Weather Conditions

Current conditions at

Salmon, Lemhi County Airport (KSMN)

Lat: 45.11667°NLon: 113.88333°WElev: 4045.0ft.

Clear

72°F

22°C

Humidity 34%
Wind Speed WNW 4 MPH
Barometer 30.03 in (1016.93 mb)
Dewpoint 42°F (6°C)
Visibility 9.00 mi
Last update 02 Aug 10:56 AM MDT
Extended Forecast for

19 Miles WNW Challis ID

Red Flag Warning August 2, 11:04am until August 2, 09:00pm
Click here for hazard details and duration
Red Flag Warning
  •  
    Red Flag Warning August 2, 11:04am until August 2, 09:00pm

    NOW until 9:00pm Sun

    Red Flag Warning

  • Today

    High: 70 °F

    Patchy Smoke

  • Tonight

    Tonight: Patchy smoke between 8pm and 11pm. Mostly clear, with a low around 41. West wind 12 to 17 mph becoming north northeast 5 to 10 mph after midnight. Winds could gust as high as 25 mph.

    Low: 41 °F

    Patchy Smoke
    then Mostly
    Clear

  • Monday

    Monday: Patchy smoke after 10am. Sunny, with a high near 65. Light and variable wind becoming northwest 5 to 9 mph in the morning.

    High: 65 °F

    Patchy Smoke

  • Monday Night

    Monday Night: Patchy smoke before 7pm. Mostly clear, with a low around 43. North northwest wind 5 to 9 mph becoming calm after midnight.

    Low: 43 °F

    Patchy Smoke
    then Clear

  • Tuesday

    Tuesday: Sunny, with a high near 71. Light and variable wind becoming northwest 5 to 10 mph in the afternoon.

    High: 71 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 48.

    Low: 48 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

Detailed Forecast

Today
Patchy smoke before 4pm. Sunny, with a high near 70. West wind 11 to 18 mph, with gusts as high as 29 mph.
Tonight
Patchy smoke between 8pm and 11pm. Mostly clear, with a low around 41. West wind 12 to 17 mph becoming north northeast 5 to 10 mph after midnight. Winds could gust as high as 25 mph.
Monday
Patchy smoke after 10am. Sunny, with a high near 65. Light and variable wind becoming northwest 5 to 9 mph in the morning.
Monday Night
Patchy smoke before 7pm. Mostly clear, with a low around 43. North northwest wind 5 to 9 mph becoming calm after midnight.
Tuesday
Sunny, with a high near 71. Light and variable wind becoming northwest 5 to 10 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 48.
Wednesday
Sunny, with a high near 76.
Wednesday Night
Mostly clear, with a low around 52.
Thursday
Sunny, with a high near 79.
Thursday Night
Mostly clear, with a low around 57.
Friday
Sunny, with a high near 79.
Friday Night
Mostly clear, with a low around 56.
Saturday
Sunny, with a high near 77.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
19 Miles WNW Challis ID
 44.65°N 114.55°W (Elev. 7999 ft)
Last Update:
2:01 am MDT Aug 2, 2026
Forecast Valid:
11am MDT Aug 2, 2026-6pm MDT Aug 8, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation