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Severe Thunderstorm and Heavy Rainfall Threat Tonight; Heat Continues on Tuesday Across the Eastern U.S.

Severe weather and flash flooding threats continue across the Central Plains and Midwest into tonight. Very large hail, strong tornadoes and damaging winds are expected. An early season heat wave will continue to challenge temperature records across the eastern U.S. through Wednesday. Read More >

Hazardous Weather Conditions

Current conditions at

Stillwater, Stillwater Regional Airport (KSWO)

Lat: 36.16°NLon: 97.09°WElev: 984ft.

Fair and Breezy

81°F

27°C

Humidity 65%
Wind Speed S 21 G 35 mph
Barometer 29.74 in (1005.7 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 18 May 10:53 pm CDT
Extended Forecast for

Stillwater Regional Airport OK

Wind Advisory May 18, 11:04pm until May 19, 03:00am
Click here for hazard details and duration
Wind Advisory
  •  
    Wind Advisory May 18, 11:04pm until May 19, 03:00am

    NOW until 3:00am Tue

    Wind Advisory

  • Tonight

    Low: 60 °F

    Severe
    Thunderstorms

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm before 7am, then a chance of showers and thunderstorms between 7am and 10am. High near 70. North wind 13 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 70 °F

    T-storms then
    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Cloudy, with a low around 53. Northeast wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 53 °F

    Chance
    T-storms then
    Showers
    Likely

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly before 7am. Cloudy through mid morning, then becoming mostly sunny, with a high near 71. Northeast wind around 11 mph.

    High: 71 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Cloudy, with a low around 56. East northeast wind 6 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.

    Low: 56 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 73. Chance of precipitation is 80%.

    High: 73 °F

    Showers

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Cloudy, with a low around 59. Chance of precipitation is 70%.

    Low: 59 °F

    Showers
    Likely

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly cloudy, with a high near 80.

    High: 80 °F

    Chance
    T-storms

Detailed Forecast

Tonight
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 4am. Some of the storms could be severe. Low around 60. South wind 15 to 21 mph becoming west southwest after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday
Showers and possibly a thunderstorm before 7am, then a chance of showers and thunderstorms between 7am and 10am. High near 70. North wind 13 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Cloudy, with a low around 53. Northeast wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly before 7am. Cloudy through mid morning, then becoming mostly sunny, with a high near 71. Northeast wind around 11 mph.
Wednesday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Cloudy, with a low around 56. East northeast wind 6 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.
Thursday
Showers and possibly a thunderstorm. High near 73. Chance of precipitation is 80%.
Thursday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Cloudy, with a low around 59. Chance of precipitation is 70%.
Friday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly cloudy, with a high near 80.
Friday Night
Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 59. Chance of precipitation is 60%.
Saturday
A slight chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 81. Chance of precipitation is 20%.
Saturday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 60.
Sunday
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 82.
Sunday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 62.
Memorial Day
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 84.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Stillwater Regional Airport OK
 36.15°N 97.09°W
Last Update:
8:47 pm CDT May 18, 2026
Forecast Valid:
11pm CDT May 18, 2026-6pm CDT May 25, 2026
 
Forecast Discussion
 
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Additional Resources

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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