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

Ontario Municipal Airport (KONO)

Lat: 44.01424°NLon: 117.00808°WElev: 2185.0ft.

Clear

77°F

25°C

Humidity 48%
Wind Speed N 0 MPH
Barometer 29.88 in (1011.85 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 19 Aug 09:53 PM MDT
Extended Forecast for

9 Miles SSW Midvale ID

Heat Advisory August 20, 12:00pm until August 21, 09:00pm
Click here for hazard details and duration
Heat Advisory
  • Tonight

    Tonight: Mostly clear, with a low around 67. Northeast wind 5 to 11 mph.

    Low: 67 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 100. Northeast wind 5 to 11 mph becoming south in the morning.

    High: 100 °F

    Hot

  • Thursday Night

    Thursday Night: Patchy smoke after 3am. Increasing clouds, with a low around 70. Calm wind becoming northeast 5 to 9 mph after midnight.

    Low: 70 °F

    Mostly Cloudy
    then Patchy
    Smoke

  • Friday

    Friday: Patchy smoke before noon. Partly sunny and hot, with a high near 102. Northeast wind 5 to 9 mph becoming calm.

    High: 102 °F

    Patchy Smoke
    then Partly
    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 73. Calm wind becoming east northeast 5 to 7 mph after midnight.

    Low: 73 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny and hot, with a high near 96.

    High: 96 °F

    Hot

  • Saturday Night

    Saturday Night: A 20 percent chance of showers before midnight.  Partly cloudy, with a low around 64.

    Low: 64 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Sunday

    Sunday: Sunny and hot, with a high near 91.

    High: 91 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 67. Northeast wind 5 to 11 mph.
Thursday
Sunny and hot, with a high near 100. Northeast wind 5 to 11 mph becoming south in the morning.
Thursday Night
Patchy smoke after 3am. Increasing clouds, with a low around 70. Calm wind becoming northeast 5 to 9 mph after midnight.
Friday
Patchy smoke before noon. Partly sunny and hot, with a high near 102. Northeast wind 5 to 9 mph becoming calm.
Friday Night
Mostly cloudy, with a low around 73. Calm wind becoming east northeast 5 to 7 mph after midnight.
Saturday
Partly sunny and hot, with a high near 96.
Saturday Night
A 20 percent chance of showers before midnight. Partly cloudy, with a low around 64.
Sunday
Sunny and hot, with a high near 91.
Sunday Night
Mostly clear, with a low around 62.
Monday
Mostly sunny and hot, with a high near 93.
Monday Night
Partly cloudy, with a low around 65.
Tuesday
Mostly sunny and hot, with a high near 94.
Tuesday Night
Partly cloudy, with a low around 66.
Wednesday
Mostly sunny and hot, with a high near 93.
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ABOUT THIS FORECAST

 
Point Forecast:
9 Miles SSW Midvale ID
 44.36°N 116.8°W (Elev. 2598 ft)
12:32 pm MDT Aug 19, 2026
10pm MDT Aug 19, 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