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

Boulder Municipal Airport (KBDU)

Lat: 40.04°NLon: 105.23°WElev: 5288ft.

Fair

52°F

11°C

Humidity 72%
Wind Speed Calm
Barometer 30.00 in
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 21 May 8:55 am MDT
Extended Forecast for

2 Miles WNW Boulder CO

  • Today

    Today: A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 66. Calm wind becoming east around 5 mph in the afternoon.

    High: 66 °F

    Partly Sunny
    then Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms. Mostly cloudy, with a low around 42. North wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.

    Low: 42 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 63. Calm wind becoming east northeast around 5 mph in the afternoon.

    High: 63 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 45. East southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.

    Low: 45 °F

    Chance
    Showers

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 70. Light and variable wind.

    High: 70 °F

    Mostly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 48.

    Low: 48 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 54.

    Low: 54 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Memorial Day

    Memorial Day: A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 82.

    High: 82 °F

    Sunny then
    Chance
    T-storms

Detailed Forecast

Today
A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 66. Calm wind becoming east around 5 mph in the afternoon.
Tonight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 42. North wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.
Friday
Mostly sunny, with a high near 63. Calm wind becoming east northeast around 5 mph in the afternoon.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 45. East southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Saturday
A 30 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 70. Light and variable wind.
Saturday Night
Mostly clear, with a low around 48.
Sunday
Sunny, with a high near 81.
Sunday Night
A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 54.
Memorial Day
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 82.
Monday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 56.
Tuesday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 78.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 54.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WNW Boulder CO
 40.04°N 105.28°W (Elev. 5495 ft)
Last Update:
12:46 am MDT May 21, 2026
Forecast Valid:
9am MDT May 21, 2026-6pm MDT 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