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

McAlester, McAlester Regional Airport (KMLC)

Lat: 34.88°NLon: 95.78°WElev: 768ft.

Fair

102°F

39°C

Humidity 29%
Wind Speed SW 10 G 20 mph
Barometer 29.93 in (1012.1 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index105°F (41°C)
Last update 19 Aug 11:53 am CDT
Extended Forecast for

Lewisville OK

Extreme Heat Warning August 19, 12:04pm until August 19, 09:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 19, 12:04pm until August 19, 09:00pm

    NOW until 9:00pm Wed

    Extreme Heat Warning

  • This Afternoon

    High: 108 °F

    Hot

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms after 4am.  Mostly clear, with a low around 80. Southwest wind around 5 mph becoming calm  after midnight.

    Low: 80 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms before 10am.  Sunny and hot, with a high near 103. Heat index values as high as 110. Calm wind becoming west around 5 mph in the morning.

    High: 103 °F

    Slight Chance
    T-storms then
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 75. North wind around 5 mph becoming calm  in the evening.

    Low: 75 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 102. Calm wind becoming east around 5 mph in the afternoon.

    High: 102 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 75. East wind around 5 mph becoming calm.

    Low: 75 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 103. Calm wind becoming southwest around 5 mph.

    High: 103 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 77. South wind around 5 mph becoming calm.

    Low: 77 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 108. Heat index values as high as 113. Southwest wind around 10 mph.
Tonight
A 20 percent chance of showers and thunderstorms after 4am. Mostly clear, with a low around 80. Southwest wind around 5 mph becoming calm after midnight.
Thursday
A 20 percent chance of showers and thunderstorms before 10am. Sunny and hot, with a high near 103. Heat index values as high as 110. Calm wind becoming west around 5 mph in the morning.
Thursday Night
Mostly clear, with a low around 75. North wind around 5 mph becoming calm in the evening.
Friday
Sunny and hot, with a high near 102. Calm wind becoming east around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 75. East wind around 5 mph becoming calm.
Saturday
Sunny and hot, with a high near 103. Calm wind becoming southwest around 5 mph.
Saturday Night
Mostly clear, with a low around 77. South wind around 5 mph becoming calm.
Sunday
Mostly sunny and hot, with a high near 104. Calm wind becoming south around 5 mph in the morning.
Sunday Night
Partly cloudy, with a low around 79. Southeast wind around 5 mph.
Monday
Mostly sunny and hot, with a high near 104. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Monday Night
Mostly clear, with a low around 79. South wind 5 to 10 mph.
Tuesday
Sunny and hot, with a high near 104. Southwest wind 5 to 10 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Lewisville OK
 35.11°N 95.28°W
10:50 am CDT Aug 19, 2026
12pm CDT Aug 19, 2026-6pm CDT Aug 25, 2026
 
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Additional Resources

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