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Tracking Major Hurricane Erin; Hot in the Mid-Mississippi Valley

Major Hurricane Erin is tracking just north of the lower Bahamas today. Dangerous surf and rip current threats increase this week for most of the Atlantic coastline. Erin's outerbands may impact the Outer Banks later this week. Hot to extremely hot temperatures are forecast today and Tuesday from a part of the southern Plains into the central to lower Mississippi River Valley. Read More >

Hazardous Weather Conditions

Current conditions at

Granby-Grand County Airport (KGNB)

Lat: 40.09°NLon: 105.92°WElev: 8207ft.

Fair

82°F

28°C

Humidity 14%
Wind Speed W 7 G 21 mph
Barometer 30.44 in
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 18 Aug 1:35 pm MDT
Extended Forecast for

5 Miles NNW Grand Lake CO

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 79. South southwest wind around 6 mph becoming northeast.

    High: 79 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 44. Northeast wind around 6 mph becoming calm in the evening.

    Low: 44 °F

    Mostly Clear

  • Tuesday

    Tuesday: Increasing clouds, with a high near 80. Calm wind becoming east 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 80 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 43. East wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 17 mph.

    Low: 43 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 82. Calm wind becoming east northeast 5 to 7 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 82 °F

    Sunny

  • Wednesday Night

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

    Low: 45 °F

    Mostly Clear

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 83.

    High: 83 °F

    Sunny then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A slight chance of showers before midnight. Partly cloudy, with a low around 44.

    Low: 44 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Friday

    Friday: A slight chance of showers, then showers and thunderstorms likely after noon. Partly sunny, with a high near 77.

    High: 77 °F

    Slight Chance
    Showers then
    T-storms
    Likely

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 79. South southwest wind around 6 mph becoming northeast.
Tonight
Mostly clear, with a low around 44. Northeast wind around 6 mph becoming calm in the evening.
Tuesday
Increasing clouds, with a high near 80. Calm wind becoming east 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph.
Tuesday Night
Mostly clear, with a low around 43. East wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 17 mph.
Wednesday
Sunny, with a high near 82. Calm wind becoming east northeast 5 to 7 mph in the afternoon. Winds could gust as high as 18 mph.
Wednesday Night
Mostly clear, with a low around 45.
Thursday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 83.
Thursday Night
A slight chance of showers before midnight. Partly cloudy, with a low around 44.
Friday
A slight chance of showers, then showers and thunderstorms likely after noon. Partly sunny, with a high near 77.
Friday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 43.
Saturday
Showers and thunderstorms likely. Partly sunny, with a high near 76.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 43.
Sunday
Showers and thunderstorms likely. Mostly cloudy, with a high near 73.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles NNW Grand Lake CO
 40.32°N 105.86°W (Elev. 8799 ft)
Last Update:
4:00 am MDT Aug 18, 2025
Forecast Valid:
1pm MDT Aug 18, 2025-6pm MDT Aug 24, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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