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

Salmon, Lemhi County Airport (KSMN)

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

Clear

63°F

17°C

Humidity 77%
Wind Speed N 0 MPH
Barometer 30.14 in (1020.66 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 18 Aug 01:05 AM MDT
Extended Forecast for

29 Miles WSW Salmon ID

  • Overnight

    Overnight: Mostly cloudy, with a low around 54. Calm wind.

    Low: 54 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A slight chance of rain between noon and 3pm, then a chance of showers and thunderstorms after 3pm.  Mostly sunny, with a high near 73. Light west wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 24 mph.  Chance of precipitation is 30%.

    High: 73 °F

    Mostly Sunny
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain before midnight.  Mostly clear, with a low around 52. West northwest wind 5 to 10 mph becoming light northwest  in the evening. Winds could gust as high as 22 mph.

    Low: 52 °F

    Slight Chance
    Rain then
    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 76. Light southwest wind becoming west southwest 5 to 9 mph in the morning. Winds could gust as high as 20 mph.

    High: 76 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 55. West wind 5 to 8 mph becoming light and variable  in the evening. Winds could gust as high as 18 mph.

    Low: 55 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy

  • Friday

    Friday: A slight chance of showers and thunderstorms after noon.  Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of rain before midnight.  Mostly cloudy, with a low around 60.

    Low: 60 °F

    Chance Rain
    then Mostly
    Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 54. Calm wind.
Tuesday
A slight chance of rain between noon and 3pm, then a chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 73. Light west wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 24 mph. Chance of precipitation is 30%.
Tuesday Night
A 20 percent chance of rain before midnight. Mostly clear, with a low around 52. West northwest wind 5 to 10 mph becoming light northwest in the evening. Winds could gust as high as 22 mph.
Wednesday
Sunny, with a high near 76. Light southwest wind becoming west southwest 5 to 9 mph in the morning. Winds could gust as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 55. West wind 5 to 8 mph becoming light and variable in the evening. Winds could gust as high as 18 mph.
Thursday
Sunny, with a high near 81.
Thursday Night
Partly cloudy, with a low around 60.
Friday
A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 81.
Friday Night
A chance of rain before midnight. Mostly cloudy, with a low around 60.
Saturday
A slight chance of rain, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 75.
Saturday Night
A slight chance of rain. Partly cloudy, with a low around 54.
Sunday
Sunny, with a high near 73.
Sunday Night
Partly cloudy, with a low around 53.
Monday
A slight chance of rain. Mostly sunny, with a high near 74.
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ABOUT THIS FORECAST

 
Point Forecast:
29 Miles WSW Salmon ID
 44.94°N 114.4°W (Elev. 7001 ft)
12:21 am MDT Aug 18, 2026
1am MDT Aug 18, 2026-6pm MDT Aug 24, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database