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

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 >

Hazardous Weather Conditions

Current conditions at

Ontario Municipal Airport (KONO)

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

Clear

86°F

30°C

Humidity 35%
Wind Speed N 0 MPH
Barometer 29.86 in (1011.18 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 19 Aug 08:35 PM MDT
Extended Forecast for

5 Miles SW Vale OR

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 61. Calm wind.

    Low: 61 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 98. Calm wind becoming east around 6 mph in the afternoon.

    High: 98 °F

    Hot

  • Thursday Night

    Thursday Night: Partly cloudy during the early evening, then becoming cloudy, with a low around 64. East wind around 6 mph becoming calm in the evening.

    Low: 64 °F

    Becoming
    Cloudy

  • Friday

    Friday: Patchy smoke between 10am and 1pm. Partly sunny and hot, with a high near 98. Light and variable wind.

    High: 98 °F

    Patchy Smoke

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 67. Light and variable wind.

    Low: 67 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny and hot, with a high near 95.

    High: 95 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 90.

    High: 90 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 61. Calm wind.
Thursday
Sunny and hot, with a high near 98. Calm wind becoming east around 6 mph in the afternoon.
Thursday Night
Partly cloudy during the early evening, then becoming cloudy, with a low around 64. East wind around 6 mph becoming calm in the evening.
Friday
Patchy smoke between 10am and 1pm. Partly sunny and hot, with a high near 98. Light and variable wind.
Friday Night
Mostly cloudy, with a low around 67. Light and variable wind.
Saturday
Partly sunny and hot, with a high near 95.
Saturday Night
Mostly clear, with a low around 61.
Sunday
Sunny and hot, with a high near 90.
Sunday Night
Mostly clear, with a low around 59.
Monday
Mostly sunny and hot, with a high near 91.
Monday Night
Partly cloudy, with a low around 62.
Tuesday
Mostly sunny and hot, with a high near 93.
Tuesday Night
Partly cloudy, with a low around 62.
Wednesday
Mostly sunny and hot, with a high near 92.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SW Vale OR
 43.95°N 117.32°W (Elev. 2300 ft)
Last Update:
12:32 pm MDT Aug 19, 2026
Forecast Valid:
8pm MDT Aug 19, 2026-6pm MDT Aug 26, 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