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

Severe Thunderstorms in the Central Plains and Lower Missouri Valley; Heat Continues in the Southeast and Southwest

Severe thunderstorms capable of large hail and damaging wind gusts are forecast to impact the central Plains into the Lower Missouri Valley through this afternoon. Dangerous heat persists across the southern Plains, Southeast U.S. and Puerto Rico this week, and will return to the Southwest today. Read More >

Hazardous Weather Conditions

Current conditions at

McAlester, McAlester Regional Airport (KMLC)

Lat: 34.88°NLon: 95.78°WElev: 768ft.

Fair

107°F

42°C

Humidity 22%
Wind Speed SW 9 mph
Barometer 29.89 in (1011.0 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Heat Index109°F (43°C)
Last update 18 Aug 5:53 pm CDT
Extended Forecast for

Longtown OK

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

    NOW until 9:00pm Wed

    Extreme Heat Warning

  • Tonight

    Low: 83 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 103. Heat index values as high as 109. Southwest wind 5 to 10 mph.

    High: 103 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 81. South wind 5 to 10 mph.

    Low: 81 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 99. Heat index values as high as 108. Southwest wind around 5 mph becoming north in the afternoon.

    High: 99 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 78. Northeast wind around 5 mph.

    Low: 78 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 98. Calm wind becoming east around 5 mph.

    High: 98 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 77. Calm wind.

    Low: 77 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 98. Calm wind becoming south around 5 mph.

    High: 98 °F

    Sunny

Detailed Forecast

Tonight
Mostly clear, with a low around 83. South wind 5 to 10 mph.
Wednesday
Sunny and hot, with a high near 103. Heat index values as high as 109. Southwest wind 5 to 10 mph.
Wednesday Night
Mostly clear, with a low around 81. South wind 5 to 10 mph.
Thursday
Sunny, with a high near 99. Heat index values as high as 108. Southwest wind around 5 mph becoming north in the afternoon.
Thursday Night
Mostly clear, with a low around 78. Northeast wind around 5 mph.
Friday
Sunny, with a high near 98. Calm wind becoming east around 5 mph.
Friday Night
Mostly clear, with a low around 77. Calm wind.
Saturday
Sunny, with a high near 98. Calm wind becoming south around 5 mph.
Saturday Night
Mostly clear, with a low around 79. South wind around 5 mph.
Sunday
Sunny, with a high near 99. South wind around 5 mph.
Sunday Night
Mostly clear, with a low around 81. South wind around 5 mph.
Monday
Sunny and hot, with a high near 100. Southwest wind 5 to 10 mph.
Monday Night
Mostly clear, with a low around 81. Southwest wind around 5 mph.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 99. Southwest wind around 5 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Longtown OK
 35.25°N 95.5°W
Last Update:
2:50 pm CDT Aug 18, 2026
Forecast Valid:
6pm CDT Aug 18, 2026-6pm CDT Aug 25, 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