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

Vance Brand Airport (KLMO)

Lat: 40.16°NLon: 105.16°WElev: 5039ft.

Fair

43°F

6°C

Humidity 90%
Wind Speed Calm
Barometer 30.11 in
Dewpoint 40°F (4°C)
Visibility 7.00 mi
Last update 21 May 1:35 am MDT
Extended Forecast for

Niwot CO

  • Overnight

    Overnight: Partly cloudy, with a low around 38. Calm wind.

    Low: 38 °F

    Partly Cloudy

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 66. Calm wind becoming north northwest 5 to 7 mph in the afternoon.

    High: 66 °F

    Partly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 41. North wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 40%.

    Low: 41 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 64. Calm wind becoming east around 6 mph in the morning.

    High: 64 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 43. East southeast wind around 6 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 43 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Saturday

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

    High: 70 °F

    Mostly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 38. Calm wind.
Thursday
A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 66. Calm wind becoming north northwest 5 to 7 mph in the afternoon.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 41. North wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 40%.
Friday
Mostly sunny, with a high near 64. Calm wind becoming east around 6 mph in the morning.
Friday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 43. East southeast wind around 6 mph becoming calm in the evening. Chance of precipitation is 20%.
Saturday
A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 70.
Saturday Night
Mostly clear, with a low around 45.
Sunday
Sunny, with a high near 82.
Sunday Night
Partly cloudy, with a low around 50.
Memorial Day
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 84.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 52.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 79.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 50.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 80.
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Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Niwot CO
 40.09°N 105.17°W (Elev. 5098 ft)
Last Update:
12:46 am MDT May 21, 2026
Forecast Valid:
1am 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