Thunderstorms and Heavy Rains Across Portions of the Central and Eastern US; Heat Expands to Portions of the East

Widespread showers and thunderstorms, some severe, may produce heavy downpours and flash flooding across much of the eastern and central U.S. Dangerous heat will continue in the Pacific Northwest and expand across portions of the East. Deep tropical moisture and associated thunderstorms will bring heavy rainfall and localized flash flooding across portions of Florida into the central Gulf Coast. Read More >

Hazardous Weather Conditions

Current conditions at

Vance Brand Airport (KLMO)

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

Fair

74°F

23°C

Humidity 45%
Wind Speed NE 10 mph
Barometer 30.09 in
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 16 Jul 1:35 am MDT
Extended Forecast for

Longmont CO

  • Overnight

    Overnight: Partly cloudy, with a low around 60. North wind around 6 mph.

    Low: 60 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm between noon and 3pm, then showers and thunderstorms likely after 3pm.  Mostly cloudy, with a high near 83. Light and variable wind becoming east northeast 5 to 9 mph in the morning. Winds could gust as high as 15 mph.  Chance of precipitation is 70%.

    High: 83 °F

    Partly Sunny
    then T-storms
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before midnight.  Mostly cloudy, with a low around 58. Southeast wind 5 to 9 mph becoming calm  after midnight. Winds could gust as high as 18 mph.  Chance of precipitation is 70%.

    Low: 58 °F

    Showers
    Likely then
    Mostly Cloudy

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms after noon.  Partly sunny, with a high near 87. Calm wind becoming southeast 5 to 7 mph in the afternoon. Winds could gust as high as 16 mph.

    High: 87 °F

    Partly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 60. South southeast wind 5 to 7 mph becoming calm  after midnight. Winds could gust as high as 16 mph.

    Low: 60 °F

    Mostly Cloudy

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after noon.  Partly sunny, with a high near 93.

    High: 93 °F

    Partly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms before midnight.  Partly cloudy, with a low around 61.

    Low: 61 °F

    Chance
    T-storms then
    Partly Cloudy

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm after noon.  Partly sunny, with a high near 90.

    High: 90 °F

    Mostly Sunny
    then Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before midnight.  Partly cloudy, with a low around 60.

    Low: 60 °F

    Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 60. North wind around 6 mph.
Wednesday
Showers likely and possibly a thunderstorm between noon and 3pm, then showers and thunderstorms likely after 3pm. Mostly cloudy, with a high near 83. Light and variable wind becoming east northeast 5 to 9 mph in the morning. Winds could gust as high as 15 mph. Chance of precipitation is 70%.
Wednesday Night
Showers likely and possibly a thunderstorm before midnight. Mostly cloudy, with a low around 58. Southeast wind 5 to 9 mph becoming calm after midnight. Winds could gust as high as 18 mph. Chance of precipitation is 70%.
Thursday
A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 87. Calm wind becoming southeast 5 to 7 mph in the afternoon. Winds could gust as high as 16 mph.
Thursday Night
Mostly cloudy, with a low around 60. South southeast wind 5 to 7 mph becoming calm after midnight. Winds could gust as high as 16 mph.
Friday
A 30 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 93.
Friday Night
A 30 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 61.
Saturday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 90.
Saturday Night
A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 60.
Sunday
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 91.
Sunday Night
Partly cloudy, with a low around 62.
Monday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 94.
Monday Night
Partly cloudy, with a low around 61.
Tuesday
Sunny, with a high near 96.
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ABOUT THIS FORECAST

 
Point Forecast:
Longmont CO
 40.16°N 105.09°W (Elev. 4980 ft)
2:47 pm MDT Jul 15, 2025
1am MDT Jul 16, 2025-6pm MDT Jul 22, 2025
 
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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