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

Heavy Rainfall and Flooding Threats in the Midwest and Ohio Valley; Heat Continues in the Plains and Southeast

An active pattern will continue to bring heavy to excessive rainfall and flash flooding threats to the Midwest and Ohio Valley over the next couple of days. Dangerous heat continues across the central/southern Plains and Southeast U.S. into next week. There is potential for record-tying/breaking temperatures with many areas forecast to see their hottest temperatures so far this year. Read More >

Hazardous Weather Conditions

Current conditions at

Alva, Alva Regional Airport (KAVK)

Lat: 36.77°NLon: 98.67°WElev: 1473ft.

Fair

95°F

35°C

Humidity 30%
Wind Speed S 17 G 25 mph
Barometer 29.80 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Heat Index94°F (34°C)
Last update 13 Aug 11:15 pm CDT
Extended Forecast for

Helena OK

Heat Advisory August 13, 11:40pm until August 16, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 13, 11:40pm until August 16, 07:00pm

    NOW until 7:00pm Sun

    Heat Advisory

  • Tonight

    Low: 82 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 106. Heat index values as high as 109. South wind 14 to 18 mph, with gusts as high as 28 mph.

    High: 106 °F

    Hot

  • Friday Night

    Friday Night: Increasing clouds, with a low around 78. South wind 14 to 17 mph, with gusts as high as 26 mph.

    Low: 78 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Sunny and hot, with a high near 106. South wind 14 to 16 mph, with gusts as high as 24 mph.

    High: 106 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 76. South wind 10 to 15 mph, with gusts as high as 23 mph.

    Low: 76 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny and hot, with a high near 103.

    High: 103 °F

    Hot

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.

    Low: 72 °F

    Chance
    T-storms

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms. Partly sunny and hot, with a high near 98.

    High: 98 °F

    Slight Chance
    T-storms

Detailed Forecast

Tonight
Mostly clear, with a low around 82. South wind around 16 mph, with gusts as high as 24 mph.
Friday
Sunny and hot, with a high near 106. Heat index values as high as 109. South wind 14 to 18 mph, with gusts as high as 28 mph.
Friday Night
Increasing clouds, with a low around 78. South wind 14 to 17 mph, with gusts as high as 26 mph.
Saturday
Sunny and hot, with a high near 106. South wind 14 to 16 mph, with gusts as high as 24 mph.
Saturday Night
Mostly clear, with a low around 76. South wind 10 to 15 mph, with gusts as high as 23 mph.
Sunday
Mostly sunny and hot, with a high near 103.
Sunday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Monday
A 20 percent chance of showers and thunderstorms. Partly sunny and hot, with a high near 98.
Monday Night
Partly cloudy, with a low around 72.
Tuesday
Mostly sunny and hot, with a high near 104.
Tuesday Night
Mostly clear, with a low around 76.
Wednesday
Sunny and hot, with a high near 106.
Wednesday Night
Mostly clear, with a low around 75.
Thursday
Mostly sunny and hot, with a high near 103.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Helena OK
 36.54°N 98.27°W
Last Update:
7:47 pm CDT Aug 13, 2026
Forecast Valid:
11pm CDT Aug 13, 2026-6pm CDT Aug 20, 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