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

Stillwater, Stillwater Regional Airport (KSWO)

Lat: 36.16°NLon: 97.09°WElev: 984ft.

Fair

98°F

37°C

Humidity 35%
Wind Speed SE 10 G 18 mph
Barometer 29.87 in (1009.8 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index102°F (39°C)
Last update 19 Aug 2:53 pm CDT
Extended Forecast for

5 Miles WNW Sumner OK

Extreme Heat Warning August 19, 03:18pm until August 19, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 19, 03:18pm until August 19, 08:00pm

    NOW until 8:00pm Wed

    Extreme Heat Warning

  • This Afternoon

    High: 103 °F

    Hot

  • Tonight

    Tonight: A 10 percent chance of showers and thunderstorms after 1am.  Increasing clouds, with a low around 72. Northeast wind 8 to 13 mph, with gusts as high as 20 mph.

    Low: 72 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Thursday

    Thursday: A 10 percent chance of showers before 10am.  Partly sunny, then gradually becoming sunny and hot, with a high near 99. Heat index values as high as 102. East northeast wind 6 to 10 mph.

    High: 99 °F

    Slight Chance
    Showers then
    Sunny

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 72. East wind 6 to 9 mph.

    Low: 72 °F

    Increasing
    Clouds

  • Friday

    Friday: Mostly sunny and hot, with a high near 101. Southeast wind 5 to 8 mph.

    High: 101 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 74.

    Low: 74 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 102.

    High: 102 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 74.

    Low: 74 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Mostly sunny and hot, with a high near 103. Northwest wind around 8 mph.
Tonight
A 10 percent chance of showers and thunderstorms after 1am. Increasing clouds, with a low around 72. Northeast wind 8 to 13 mph, with gusts as high as 20 mph.
Thursday
A 10 percent chance of showers before 10am. Partly sunny, then gradually becoming sunny and hot, with a high near 99. Heat index values as high as 102. East northeast wind 6 to 10 mph.
Thursday Night
Increasing clouds, with a low around 72. East wind 6 to 9 mph.
Friday
Mostly sunny and hot, with a high near 101. Southeast wind 5 to 8 mph.
Friday Night
Mostly clear, with a low around 74.
Saturday
Sunny and hot, with a high near 102.
Saturday Night
Mostly clear, with a low around 74.
Sunday
Mostly sunny and hot, with a high near 102.
Sunday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 77.
Monday
A 20 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 103.
Monday Night
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 77.
Tuesday
Mostly sunny and hot, with a high near 102.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WNW Sumner OK
 36.33°N 97.2°W
1:27 pm CDT Aug 19, 2026
3pm CDT Aug 19, 2026-6pm CDT Aug 25, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database