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

Excessive Rainfall and Tropical Storm in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce considerable, potentially life-threatening, flooding across the lower Mississippi River Valley and central Great Lakes region through tonight. Tropical Storm Arthur will move northeastward along the Texas coast today and then move inland over southwestern Louisiana by tonight. An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana. Read More >

Hazardous Weather Conditions

Current conditions at

Stillwater, Stillwater Regional Airport (KSWO)

Lat: 36.16°NLon: 97.09°WElev: 984ft.

Fair and Windy

93°F

34°C

Humidity 50%
Wind Speed S 26 G 36 mph
Barometer 29.51 in (997.5 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index101°F (38°C)
Last update 17 Jun 2:53 pm CDT
Extended Forecast for

7 Miles WSW Stillwater Regional Airport OK

Heat Advisory until June 17, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory until June 17, 08:00pm

    NOW until 8:00pm Wed

    Heat Advisory

  • This Afternoon

    High: 99 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 75. South wind 12 to 17 mph becoming east southeast 6 to 11 mph after midnight. Winds could gust as high as 26 mph.

    Low: 75 °F

    Mostly Clear

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms, mainly before 1pm. Mostly cloudy, with a high near 84. Northeast wind 7 to 15 mph, with gusts as high as 23 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 84 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. Northeast wind 7 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.

    Low: 66 °F

    Chance
    T-storms then
    Showers
    Likely

  • Juneteenth

    Juneteenth: A chance of showers and thunderstorms before 1pm, then a slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly cloudy, with a high near 86. East southeast wind 7 to 9 mph. Chance of precipitation is 30%.

    High: 86 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 71. Chance of precipitation is 60%.

    Low: 71 °F

    Chance
    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 90.

    High: 90 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 75.

    Low: 75 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 99. Heat index values as high as 108. South southwest wind 18 to 20 mph, with gusts as high as 30 mph.
Tonight
Mostly clear, with a low around 75. South wind 12 to 17 mph becoming east southeast 6 to 11 mph after midnight. Winds could gust as high as 26 mph.
Thursday
A 50 percent chance of showers and thunderstorms, mainly before 1pm. Mostly cloudy, with a high near 84. Northeast wind 7 to 15 mph, with gusts as high as 23 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. Northeast wind 7 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.
Juneteenth
A chance of showers and thunderstorms before 1pm, then a slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly cloudy, with a high near 86. East southeast wind 7 to 9 mph. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 71. Chance of precipitation is 60%.
Saturday
A 40 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 90.
Saturday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 75.
Sunday
A 20 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 97.
Sunday Night
Showers and thunderstorms likely, mainly before 1am. Partly cloudy, with a low around 72. Chance of precipitation is 70%.
Monday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.
Monday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68.
Tuesday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 86.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
7 Miles WSW Stillwater Regional Airport OK
 36.13°N 97.2°W
Last Update:
1:27 pm CDT Jun 17, 2026
Forecast Valid:
3pm CDT Jun 17, 2026-6pm CDT Jun 23, 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