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

Dangerous Heat over the South-Central and Southwest U.S. Through Next Week

Dangerous heat persists across the Desert Southwest through this weekend and across the Southern Plains and Lower Mississippi Valley through at least the middle of next week. Numerous daily record high temperatures are expected through at least Tuesday for much of Texas and Oklahoma as well as portions of Louisiana, New Mexico, and Arizona. Read More >

Hazardous Weather Conditions

Current conditions at

Pocatello, Pocatello Regional Airport (KPIH)

Lat: 42.92028°NLon: 112.57111°WElev: 4449.0ft.

Clear

81°F

27°C

Humidity 32%
Wind Speed NNE 4 MPH
Barometer 30.17 in (1021.67 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 21 Aug 10:00 AM MDT
Extended Forecast for

American Falls ID

Heat Advisory August 21, 12:00pm until August 21, 10:00pm
Click here for hazard details and duration
Heat Advisory

  • Today

    Today: A 20 percent chance of showers after 5pm. Increasing clouds and hot, with a high near 101. North northeast wind 6 to 8 mph becoming south southwest in the afternoon.

    High: 101 °F

    Sunny then
    Slight Chance
    Showers

  • Tonight

    Tonight: A 30 percent chance of showers, mainly between midnight and 2am. Cloudy, with a low around 66. West southwest wind 7 to 11 mph becoming southeast after midnight.

    Low: 66 °F

    Chance
    Showers

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms, mainly before 4pm. Partly sunny, with a high near 95. South wind 7 to 11 mph, with gusts as high as 21 mph.

    High: 95 °F

    Partly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 60. South southeast wind 6 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 50%.

    Low: 60 °F

    Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 90. South southeast wind 5 to 13 mph becoming west southwest in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 50%.

    High: 90 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 59. Chance of precipitation is 40%.

    Low: 59 °F

    Chance
    Showers then
    Mostly Cloudy

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 89.

    High: 89 °F

    Partly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 57.

    Low: 57 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 89.

    High: 89 °F

    Mostly Sunny

Detailed Forecast

Today
A 20 percent chance of showers after 5pm. Increasing clouds and hot, with a high near 101. North northeast wind 6 to 8 mph becoming south southwest in the afternoon.
Tonight
A 30 percent chance of showers, mainly between midnight and 2am. Cloudy, with a low around 66. West southwest wind 7 to 11 mph becoming southeast after midnight.
Saturday
A 40 percent chance of showers and thunderstorms, mainly before 4pm. Partly sunny, with a high near 95. South wind 7 to 11 mph, with gusts as high as 21 mph.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 60. South southeast wind 6 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 50%.
Sunday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 90. South southeast wind 5 to 13 mph becoming west southwest in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 50%.
Sunday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 59. Chance of precipitation is 40%.
Monday
A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 89.
Monday Night
A 20 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 57.
Tuesday
Mostly sunny, with a high near 89.
Tuesday Night
Partly cloudy, with a low around 58.
Wednesday
Mostly sunny, with a high near 91.
Wednesday Night
Mostly cloudy, with a low around 58.
Thursday
Mostly sunny, with a high near 88.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
American Falls ID
 42.78°N 112.81°W (Elev. 4600 ft)
Last Update:
5:31 am MDT Aug 21, 2026
Forecast Valid:
10am MDT Aug 21, 2026-6pm MDT Aug 27, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation