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

Broomfield / Jeffco (KBJC)

Lat: 39.9°NLon: 105.1°WElev: 5551ft.

Fair

45°F

7°C

Humidity 81%
Wind Speed Calm
Barometer 30.05 in
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 21 May 6:45 am MDT
Extended Forecast for

Blue Valley CO

  • Today

    Today: A 40 percent chance of showers and thunderstorms after noon. Increasing clouds, with a high near 51. Light and variable wind becoming west 5 to 8 mph in the morning. Winds could gust as high as 16 mph.

    High: 51 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tonight

    Tonight: A chance of rain showers before midnight, then a slight chance of snow showers. Some thunder is also possible. Partly cloudy, with a low around 28. West wind 5 to 7 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.

    Low: 28 °F

    Chance
    Showers then
    Slight Chance
    Snow Showers

  • Friday

    Friday: A slight chance of snow showers between noon and 3pm, then a slight chance of rain showers after 3pm. Some thunder is also possible. Increasing clouds, with a high near 49. West wind 5 to 9 mph becoming east in the afternoon. Winds could gust as high as 17 mph. Chance of precipitation is 20%.

    High: 49 °F

    Mostly Sunny
    then Slight
    Chance
    Rain/Snow

  • Friday Night

    Friday Night: Rain showers likely before midnight, then a chance of rain and snow showers between midnight and 3am, then a chance of snow showers after 3am. Some thunder is also possible. Mostly cloudy, with a low around 32. East southeast wind 5 to 9 mph becoming calm. Winds could gust as high as 20 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    Low: 32 °F

    Showers
    Likely then
    Chance
    Rain/Snow

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 54. West wind 5 to 10 mph, with gusts as high as 22 mph.

    High: 54 °F

    Mostly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 35.

    Low: 35 °F

    Mostly Clear

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 63.

    High: 63 °F

    Sunny then
    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 41.

    Low: 41 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Memorial Day

    Memorial Day: Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 67.

    High: 67 °F

    Sunny then
    Showers
    Likely

Detailed Forecast

Today
A 40 percent chance of showers and thunderstorms after noon. Increasing clouds, with a high near 51. Light and variable wind becoming west 5 to 8 mph in the morning. Winds could gust as high as 16 mph.
Tonight
A chance of rain showers before midnight, then a slight chance of snow showers. Some thunder is also possible. Partly cloudy, with a low around 28. West wind 5 to 7 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.
Friday
A slight chance of snow showers between noon and 3pm, then a slight chance of rain showers after 3pm. Some thunder is also possible. Increasing clouds, with a high near 49. West wind 5 to 9 mph becoming east in the afternoon. Winds could gust as high as 17 mph. Chance of precipitation is 20%.
Friday Night
Rain showers likely before midnight, then a chance of rain and snow showers between midnight and 3am, then a chance of snow showers after 3am. Some thunder is also possible. Mostly cloudy, with a low around 32. East southeast wind 5 to 9 mph becoming calm. Winds could gust as high as 20 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Saturday
A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 54. West wind 5 to 10 mph, with gusts as high as 22 mph.
Saturday Night
Mostly clear, with a low around 35.
Sunday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 63.
Sunday Night
A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 41.
Memorial Day
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 67.
Monday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 43.
Tuesday
Showers and possibly a thunderstorm. Mostly cloudy, with a high near 63.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 41.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 63.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Blue Valley CO
 39.7°N 105.48°W (Elev. 9301 ft)
Last Update:
12:46 am MDT May 21, 2026
Forecast Valid:
7am MDT May 21, 2026-6pm MDT May 27, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation