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

Erin Strengthens to a Hurricane; Heavy Rainfall Possible in Puerto Rico and the Virgin Islands, the Upper Midwest, South Texas

Hurricane Erin may bring isolated flash and urban flooding, landslides or mudslides, and possible tropical storm conditions to Puerto Rico and the U.S. Virgin Islands this weekend. Scattered thunderstorms and heavy rainfall may bring areas of flooding this weekend over the Upper Midwest. A tropical disturbance will bring locally heavy rain and mainly urban flash flooding to far southern Texas. Read More >

Hazardous Weather Conditions

Current conditions at

Vance Brand Airport (KLMO)

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

Fair

60°F

16°C

Humidity 68%
Wind Speed W 5 mph
Barometer 30.11 in
Dewpoint 49°F (9°C)
Visibility 7.00 mi
Last update 17 Aug 4:55 am MDT
Extended Forecast for

2 Miles SSW Longmont CO

  • Today

    Today: Sunny, with a high near 92. Calm wind becoming east southeast around 5 mph in the afternoon.

    High: 92 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 60. East wind around 6 mph becoming calm in the evening.

    Low: 60 °F

    Mostly Clear

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after noon. Sunny, with a high near 93. Calm wind becoming south southeast 5 to 8 mph in the afternoon. Winds could gust as high as 17 mph.

    High: 93 °F

    Sunny then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Mostly clear, with a low around 59. South southeast wind 5 to 8 mph becoming calm in the evening. Winds could gust as high as 17 mph.

    Low: 59 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 94. Calm wind becoming east 5 to 8 mph in the afternoon. Winds could gust as high as 17 mph.

    High: 94 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 96.

    High: 96 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 98.

    High: 98 °F

    Hot

Detailed Forecast

Today
Sunny, with a high near 92. Calm wind becoming east southeast around 5 mph in the afternoon.
Tonight
Mostly clear, with a low around 60. East wind around 6 mph becoming calm in the evening.
Monday
A 20 percent chance of showers and thunderstorms after noon. Sunny, with a high near 93. Calm wind becoming south southeast 5 to 8 mph in the afternoon. Winds could gust as high as 17 mph.
Monday Night
Mostly clear, with a low around 59. South southeast wind 5 to 8 mph becoming calm in the evening. Winds could gust as high as 17 mph.
Tuesday
Sunny, with a high near 94. Calm wind becoming east 5 to 8 mph in the afternoon. Winds could gust as high as 17 mph.
Tuesday Night
Mostly clear, with a low around 61.
Wednesday
Sunny, with a high near 96.
Wednesday Night
Mostly clear, with a low around 61.
Thursday
Sunny and hot, with a high near 98.
Thursday Night
Partly cloudy, with a low around 63.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 59.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 86.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSW Longmont CO
 40.14°N 105.12°W (Elev. 5000 ft)
Last Update:
4:01 am MDT Aug 17, 2025
Forecast Valid:
5am MDT Aug 17, 2025-6pm MDT Aug 23, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation