Heavy Rainfall Threat for Mid-Atlantic into Southern New England; Fire Weather Hazards for the West

Heavy rain and isolated severe thunderstorms may cause flash flooding in the northern Mid-Atlantic today. The Mid-Atlantic and Southeast heatwave is slowly easing, while cooler, drier air spreads across the Central and Eastern U.S. for the start of August. Critical fire conditions persist in the Pacific Northwest and Four Corners due to dry storms and gusty winds. Read More >

Current conditions at

Salmon, Lemhi County Airport (KSMN)

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

Clear

81°F

27°C

Humidity 32%
Wind Speed NW 4 MPH
Barometer 30.07 in (1018.29 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 31 Jul 12:50 PM MDT
Extended Forecast for

4 Miles S Salmon ID

Flood Watch until July 31, 08:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch until July 31, 08:00pm

    NOW until 8:00pm Thu

    Flood Watch

  • This Afternoon

    High: 89 °F

    Severe
    Thunderstorms

  • Tonight

    Tonight: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Some of the storms could be severe.  Mostly cloudy, then gradually becoming mostly clear, with a low around 52. Northwest wind 5 to 7 mph becoming calm  in the evening.  Chance of precipitation is 40%.

    Low: 52 °F

    Severe
    Thunderstorms
    then Partly
    Cloudy

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms after noon.  Increasing clouds, with a high near 82. Calm wind becoming west 5 to 7 mph in the afternoon.

    High: 82 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight.  Mostly cloudy, then gradually becoming mostly clear, with a low around 50. North northwest wind 5 to 7 mph becoming calm  in the evening.  Chance of precipitation is 20%.

    Low: 50 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after noon.  Mostly sunny, with a high near 82. Calm wind becoming northwest 5 to 7 mph in the afternoon.

    High: 82 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 51.

    Low: 51 °F

    Partly Cloudy

Detailed Forecast

This Afternoon
A 40 percent chance of showers and thunderstorms. Some of the storms could be severe. Mostly cloudy, with a high near 89. Southeast wind around 6 mph becoming east northeast.
Tonight
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Some of the storms could be severe. Mostly cloudy, then gradually becoming mostly clear, with a low around 52. Northwest wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 40%.
Friday
A 50 percent chance of showers and thunderstorms after noon. Increasing clouds, with a high near 82. Calm wind becoming west 5 to 7 mph in the afternoon.
Friday Night
A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 50. North northwest wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 20%.
Saturday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 82. Calm wind becoming northwest 5 to 7 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 50.
Sunday
Sunny, with a high near 84.
Sunday Night
Partly cloudy, with a low around 51.
Monday
A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 83.
Monday Night
A slight chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 49.
Tuesday
Mostly sunny, with a high near 81.
Tuesday Night
Partly cloudy, with a low around 50.
Wednesday
Mostly sunny, with a high near 86.
Wednesday Night
Partly cloudy, with a low around 50.
Thursday
Sunny, with a high near 88.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S Salmon ID
 45.12°N 113.89°W (Elev. 4034 ft)
2:30 pm MDT Jul 31, 2025
4pm MDT Jul 31, 2025-6pm MDT Aug 7, 2025
 
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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