National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Severe Thunderstorms and Heavy Rain for the South-Central U.S.

Severe thunderstorms capable of very large hail, damaging wind, and a couple of tornadoes will be possible Monday afternoon into the night from portions of the central and southern High Plains into southwest Texas. A heavy rain event with flooding is expected in the southern Plains into western Arkansas through the end of the week. Read More >

Hazardous Weather Conditions

Current conditions at

Vance Brand Airport (KLMO)

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

Overcast

56°F

13°C

Humidity 83%
Wind Speed Calm
Barometer 30.09 in
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 16 May 10:35 pm MDT
Extended Forecast for

Longmont CO

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly before 2am. Cloudy, with a low around 48. West northwest wind around 5 mph becoming calm in the evening.

    Chance
    T-storms

    Low: 48 °F

  • Monday

    Monday: A chance of showers and thunderstorms before noon, then showers likely and possibly a thunderstorm between noon and 3pm, then showers and thunderstorms likely after 3pm. Cloudy, with a high near 62. East wind 3 to 7 mph. Chance of precipitation is 60%.

    Chance
    Showers then
    T-storms
    Likely

    High: 62 °F

  • Monday
    Night

    Monday Night: Showers and thunderstorms likely before 9pm, then showers likely and possibly a thunderstorm between 9pm and midnight, then a chance of showers and thunderstorms after midnight. Cloudy, with a low around 49. East wind 5 to 7 mph becoming calm. Chance of precipitation is 70%.

    T-storms
    Likely

    Low: 49 °F

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm. High near 66. Light and variable wind becoming east 5 to 7 mph in the afternoon. Winds could gust as high as 15 mph. Chance of precipitation is 80%.

    Showers
    Likely then
    T-storms

    High: 66 °F

  • Tuesday
    Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 47. East southeast wind 5 to 7 mph becoming calm in the evening.

    Chance
    T-storms then
    Mostly Cloudy

    Low: 47 °F

  • Wednesday

    Wednesday: A slight chance of showers before 9am, then a slight chance of showers and thunderstorms between 9am and noon, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 71. Chance of precipitation is 60%.

    Slight Chance
    T-storms then
    Showers
    Likely

    High: 71 °F

  • Wednesday
    Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 48.

    Slight Chance
    T-storms then
    Partly Cloudy

    Low: 48 °F

  • Thursday

    Thursday: A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 78.

    Mostly Sunny
    then Chance
    T-storms

    High: 78 °F

  • Thursday
    Night

    Thursday Night: A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 50.

    Slight Chance
    T-storms then
    Partly Cloudy

    Low: 50 °F

Detailed Forecast

Tonight
A 40 percent chance of showers and thunderstorms, mainly before 2am. Cloudy, with a low around 48. West northwest wind around 5 mph becoming calm in the evening.
Monday
A chance of showers and thunderstorms before noon, then showers likely and possibly a thunderstorm between noon and 3pm, then showers and thunderstorms likely after 3pm. Cloudy, with a high near 62. East wind 3 to 7 mph. Chance of precipitation is 60%.
Monday Night
Showers and thunderstorms likely before 9pm, then showers likely and possibly a thunderstorm between 9pm and midnight, then a chance of showers and thunderstorms after midnight. Cloudy, with a low around 49. East wind 5 to 7 mph becoming calm. Chance of precipitation is 70%.
Tuesday
Showers and possibly a thunderstorm. High near 66. Light and variable wind becoming east 5 to 7 mph in the afternoon. Winds could gust as high as 15 mph. Chance of precipitation is 80%.
Tuesday Night
A 30 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 47. East southeast wind 5 to 7 mph becoming calm in the evening.
Wednesday
A slight chance of showers before 9am, then a slight chance of showers and thunderstorms between 9am and noon, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 71. Chance of precipitation is 60%.
Wednesday Night
A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 48.
Thursday
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 78.
Thursday Night
A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 50.
Friday
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 75.
Friday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 48.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 72.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 47.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 67.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
Longmont CO
 40.19°N 105.09°W (Elev. 5010 ft)
Last Update:
7:02 pm MDT May 16, 2021
Forecast Valid:
10pm MDT May 16, 2021-6pm MDT May 23, 2021
 
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