Severe Thunderstorms in the Midwest and Arizona; Heat Continues in the Southeast and Southwest

Thunderstorms, some severe, may lead to scattered instances of flash flooding across the Midwest and Ohio Valley and southern Arizona. The threat will shift to the Mid-Atlantic coast on Thursday. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

Joslin Field - Magic Valley Regional Airport (KTWF)

Lat: 42.4785°NLon: 114.47739°WElev: 4163.0ft.

Clear

70°F

21°C

Humidity 22%
Wind Speed SSW 10 MPH
Barometer 30.04 in (1017.27 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 20 Aug 04:35 AM MDT
Extended Forecast for

22 Miles SSW Castleford ID

  • Today

    Today: Increasing clouds and hot, with a high near 95. South southwest wind 5 to 8 mph becoming north northeast in the afternoon.

    High: 95 °F

    Hot

  • Tonight

    Tonight: Partly cloudy, with a low around 66. Light and variable wind becoming southwest 5 to 10 mph after midnight.

    Low: 66 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny through mid morning, then becoming cloudy and hot, with a high near 95. South southwest wind 6 to 14 mph becoming north northeast in the afternoon.

    High: 95 °F

    Hot

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms, mainly before midnight.  Mostly cloudy, with a low around 67. South wind 13 to 17 mph.

    Low: 67 °F

    Chance
    Showers then
    Slight Chance
    T-storms

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms after noon.  Partly sunny, with a high near 88. South southwest wind 10 to 14 mph becoming west in the afternoon.

    High: 88 °F

    Partly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms before midnight.  Mostly cloudy, with a low around 62.

    Low: 62 °F

    Chance
    Showers then
    Mostly Cloudy

  • Sunday

    Sunday: A 40 percent chance of showers and thunderstorms after noon.  Partly sunny, with a high near 84.

    High: 84 °F

    Mostly Sunny
    then Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 58.

    Low: 58 °F

    Mostly Cloudy

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms after noon.  Partly sunny, with a high near 84.

    High: 84 °F

    Partly Sunny
    then Chance
    Showers

Detailed Forecast

Today
Increasing clouds and hot, with a high near 95. South southwest wind 5 to 8 mph becoming north northeast in the afternoon.
Tonight
Partly cloudy, with a low around 66. Light and variable wind becoming southwest 5 to 10 mph after midnight.
Friday
Mostly sunny through mid morning, then becoming cloudy and hot, with a high near 95. South southwest wind 6 to 14 mph becoming north northeast in the afternoon.
Friday Night
A 30 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 67. South wind 13 to 17 mph.
Saturday
A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 88. South southwest wind 10 to 14 mph becoming west in the afternoon.
Saturday Night
A 30 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 62.
Sunday
A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 84.
Sunday Night
Mostly cloudy, with a low around 58.
Monday
A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 84.
Monday Night
A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 59.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Tuesday Night
Mostly cloudy, with a low around 60.
Wednesday
Partly sunny, with a high near 86.
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ABOUT THIS FORECAST

 
Point Forecast:
22 Miles SSW Castleford ID
 42.24°N 115.06°W (Elev. 5305 ft)
12:29 am MDT Aug 20, 2026
4am MDT Aug 20, 2026-6pm MDT Aug 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