Severe Thunderstorms and Flooding from the Southern Plains to the Great Lakes; Record Heat in the East

Widely scattered severe thunderstorms may produce damaging winds, hail, and flash flooding from the southern Plains into the lower Great Lakes. Elevated to locally critical fire weather conditions will persist across portions of the Southwest and Southern High Plains due to gusty winds and dry conditions. An early-season heatwave will challenge temperature records across the eastern U.S.. Read More >

Current conditions at

Boulder Municipal Airport (KBDU)

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

Overcast

37°F

3°C

Humidity 93%
Wind Speed Calm
Barometer 30.23 in
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 19 May 4:55 am MDT
Extended Forecast for

Boulder CO

  • Overnight

    Overnight: A chance of rain and snow showers.  Patchy fog.  Otherwise, cloudy, with a low around 33. Calm wind.  Chance of precipitation is 30%. Little or no snow accumulation expected.

    Low: 33 °F

    Chance
    Rain/Snow and
    Patchy Fog

  • Tuesday

    Tuesday: A slight chance of rain and snow showers before 9am, then a chance of rain showers after noon. Some thunder is also possible.  Patchy fog before 9am.  Otherwise, cloudy, with a high near 47. Calm wind becoming east southeast around 5 mph.  Chance of precipitation is 50%. Little or no snow accumulation expected.

    High: 47 °F

    Slight Chance
    Rain/Snow and
    Patchy Fog
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers.  Cloudy, with a low around 38. Light and variable wind.

    Low: 38 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after noon.  Partly sunny, with a high near 58. Calm wind becoming east northeast around 5 mph in the afternoon.  Chance of precipitation is 50%.

    High: 58 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight.  Partly cloudy, with a low around 39. North northeast wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 30%.

    Low: 39 °F

    Chance
    Showers then
    Partly Cloudy

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm after noon.  Partly sunny, with a high near 66. Chance of precipitation is 60%.

    High: 66 °F

    Mostly Sunny
    then Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before midnight, then a chance of showers.  Mostly cloudy, with a low around 43. Chance of precipitation is 60%.

    Low: 43 °F

    Showers
    Likely

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after noon.  Partly sunny, with a high near 65.

    High: 65 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms before midnight.  Mostly cloudy, with a low around 44.

    Low: 44 °F

    Slight Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Overnight
A chance of rain and snow showers. Patchy fog. Otherwise, cloudy, with a low around 33. Calm wind. Chance of precipitation is 30%. Little or no snow accumulation expected.
Tuesday
A slight chance of rain and snow showers before 9am, then a chance of rain showers after noon. Some thunder is also possible. Patchy fog before 9am. Otherwise, cloudy, with a high near 47. Calm wind becoming east southeast around 5 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.
Tuesday Night
A 50 percent chance of showers. Cloudy, with a low around 38. Light and variable wind.
Wednesday
A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 58. Calm wind becoming east northeast around 5 mph in the afternoon. Chance of precipitation is 50%.
Wednesday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Partly cloudy, with a low around 39. North northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Thursday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 66. Chance of precipitation is 60%.
Thursday Night
Showers likely and possibly a thunderstorm before midnight, then a chance of showers. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.
Friday
A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 65.
Friday Night
A slight chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 44.
Saturday
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 74.
Saturday Night
Partly cloudy, with a low around 49.
Sunday
Sunny, with a high near 81.
Sunday Night
Partly cloudy, with a low around 53.
Memorial Day
Sunny, with a high near 84.
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ABOUT THIS FORECAST

 
Point Forecast:
Boulder CO
 40.02°N 105.25°W (Elev. 5358 ft)
12:46 am MDT May 19, 2026
5am MDT May 19, 2026-6pm MDT May 25, 2026
 
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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