Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, 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 28%
Wind Speed SSW 11 MPH
Barometer 30.08 in (1018.63 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 19 Aug 12:35 AM MDT
Extended Forecast for

11 Miles SSW Castleford ID

  • Overnight

    Overnight: Mostly clear, with a low around 61. Southwest wind 5 to 7 mph.

    Low: 61 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 92. Southwest wind 5 to 10 mph becoming north northeast in the afternoon.

    High: 92 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 63. North northeast wind 7 to 10 mph becoming south after midnight.

    Low: 63 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny and hot, with a high near 97. South wind 6 to 10 mph becoming north in the afternoon.

    High: 97 °F

    Hot

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 65. North northeast wind 8 to 13 mph becoming south southwest after midnight.

    Low: 65 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny and hot, with a high near 98.

    High: 98 °F

    Hot

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms, mainly before midnight.  Mostly cloudy, with a low around 68.

    Low: 68 °F

    Chance
    Showers then
    Slight Chance
    T-storms

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms after noon.  Partly sunny and hot, with a high near 90.

    High: 90 °F

    Partly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms before midnight.  Mostly cloudy, with a low around 63.

    Low: 63 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 61. Southwest wind 5 to 7 mph.
Wednesday
Mostly sunny and hot, with a high near 92. Southwest wind 5 to 10 mph becoming north northeast in the afternoon.
Wednesday Night
Mostly clear, with a low around 63. North northeast wind 7 to 10 mph becoming south after midnight.
Thursday
Mostly sunny and hot, with a high near 97. South wind 6 to 10 mph becoming north in the afternoon.
Thursday Night
Partly cloudy, with a low around 65. North northeast wind 8 to 13 mph becoming south southwest after midnight.
Friday
Mostly sunny and hot, with a high near 98.
Friday Night
A 40 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 68.
Saturday
A 30 percent chance of showers and thunderstorms after noon. Partly sunny and hot, with a high near 90.
Saturday Night
A 20 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 63.
Sunday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 86.
Sunday Night
Partly cloudy, with a low around 60.
Monday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 88.
Monday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 61.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88.
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ABOUT THIS FORECAST

 
Point Forecast:
11 Miles SSW Castleford ID
 42.36°N 114.93°W (Elev. 4639 ft)
12:29 am MDT Aug 19, 2026
12am MDT Aug 19, 2026-6pm MDT Aug 25, 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