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

Heavy Rainfall in the Southern Plains and Mississippi Valley; Thunderstorms in Eastern Colorado on Thursday

A multiple day heavy rainfall event will begin to set up from the Southern Plains into the Mississippi Valley Thursday, peaking in intensity over the holiday weekend. Widely scattered thunderstorms are expected to develop across eastern Colorado Thursday afternoon and evening. Large hail will be the primary hazard. Read More >

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Mostly Cloudy

69°F

21°C

Humidity 96%
Wind Speed Calm
Barometer 30.07 in (1017.9 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 21 May 1:52 am EDT
Extended Forecast for

Oakton VA

  • Overnight

    Overnight: A chance of showers and thunderstorms. Cloudy, with a low around 61. North wind around 6 mph. Chance of precipitation is 50%.

    Low: 61 °F

    Chance
    Showers

  • Thursday

    Thursday: Showers likely, with thunderstorms also possible after 2pm. Cloudy, with a high near 65. Northeast wind 8 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 65 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely before 4am, then a chance of showers. Cloudy, with a low around 54. Northeast wind around 7 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 54 °F

    Showers
    Likely then
    Chance
    Showers

  • Friday

    Friday: Showers, with thunderstorms also possible after 5pm. High near 61. East wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 61 °F

    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Low around 50. East wind 7 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 90%.

    Low: 50 °F

    Showers

  • Saturday

    Saturday: Showers, with thunderstorms also possible after 2pm. High near 65. Chance of precipitation is 90%.

    High: 65 °F

    Showers

  • Saturday Night

    Saturday Night: Showers. Low around 53. Chance of precipitation is 80%.

    Low: 53 °F

    Showers

  • Sunday

    Sunday: Showers likely, mainly before 8am. Mostly cloudy, with a high near 76. Chance of precipitation is 60%.

    High: 76 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: A chance of showers before 2am. Mostly cloudy, with a low around 62. Chance of precipitation is 40%.

    Low: 62 °F

    Chance
    Showers

Detailed Forecast

Overnight
A chance of showers and thunderstorms. Cloudy, with a low around 61. North wind around 6 mph. Chance of precipitation is 50%.
Thursday
Showers likely, with thunderstorms also possible after 2pm. Cloudy, with a high near 65. Northeast wind 8 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers and thunderstorms likely before 4am, then a chance of showers. Cloudy, with a low around 54. Northeast wind around 7 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
Showers, with thunderstorms also possible after 5pm. High near 61. East wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers and possibly a thunderstorm. Low around 50. East wind 7 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 90%.
Saturday
Showers, with thunderstorms also possible after 2pm. High near 65. Chance of precipitation is 90%.
Saturday Night
Showers. Low around 53. Chance of precipitation is 80%.
Sunday
Showers likely, mainly before 8am. Mostly cloudy, with a high near 76. Chance of precipitation is 60%.
Sunday Night
A chance of showers before 2am. Mostly cloudy, with a low around 62. Chance of precipitation is 40%.
Memorial Day
A chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 78. Chance of precipitation is 50%.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Chance of precipitation is 40%.
Tuesday
A chance of showers. Mostly cloudy, with a high near 80. Chance of precipitation is 40%.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 63. Chance of precipitation is 30%.
Wednesday
A chance of showers. Mostly cloudy, with a high near 81. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Oakton VA
 38.87°N 77.31°W (Elev. 400 ft)
Last Update:
10:53 pm EDT May 20, 2026
Forecast Valid:
2am EDT May 21, 2026-6pm EDT May 27, 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