Thunderstorms and Heavy Rains in the Appalachians

Multiple rounds of moderate to locally heavy rain will impact portions of the Appalachians and Mid-Atlantic, which may lead to flash flooding concerns. Thunderstorms with isolated severe wind gusts will be possible this afternoon from parts of the Southeast into the southern and central Appalachians. A multi-day heavy rain will pose a flash flood threat in New Mexico beginning Tuesday. Read More >

Current conditions at

Granby-Grand County Airport (KGNB)

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

Fair

56°F

13°C

Humidity 48%
Wind Speed Calm
Barometer 30.43 in
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 21 Sep 11:15 am MDT
Extended Forecast for

2 Miles NW Saint Marys Glacier CO

  • Today

    Today: Mostly sunny, with a high near 55. West northwest wind 5 to 9 mph, with gusts as high as 15 mph.

    High: 55 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 36. Southeast wind 6 to 9 mph becoming west southwest after midnight. Winds could gust as high as 15 mph.

    Low: 36 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A chance of showers between noon and 3pm, then a chance of showers and thunderstorms after 3pm.  Increasing clouds, with a high near 55. West southwest wind 5 to 9 mph becoming south southeast in the afternoon. Winds could gust as high as 15 mph.  Chance of precipitation is 40%.

    High: 55 °F

    Mostly Sunny
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight.  Mostly cloudy, with a low around 38. South wind 7 to 11 mph becoming west after midnight. Winds could gust as high as 18 mph.  Chance of precipitation is 50%.

    Low: 38 °F

    Chance
    Showers then
    Mostly Cloudy

  • Wednesday

    Wednesday: A 50 percent chance of showers and thunderstorms after noon.  Mostly cloudy, with a high near 51. West wind 6 to 13 mph, with gusts as high as 21 mph.

    High: 51 °F

    Mostly Cloudy
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms.  Mostly cloudy, with a low around 36. Chance of precipitation is 20%.

    Low: 36 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Thursday

    Thursday: A chance of showers, then showers likely and possibly a thunderstorm after noon.  Partly sunny, with a high near 52. Chance of precipitation is 60%.

    High: 52 °F

    Chance
    Showers then
    Showers
    Likely

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before midnight.  Mostly cloudy, with a low around 37.

    Low: 37 °F

    Chance
    Showers then
    Mostly Cloudy

  • Friday

    Friday: A chance of showers and thunderstorms after noon.  Partly sunny, with a high near 53.

    High: 53 °F

    Partly Sunny
    then Chance
    T-storms

Detailed Forecast

Today
Mostly sunny, with a high near 55. West northwest wind 5 to 9 mph, with gusts as high as 15 mph.
Tonight
Partly cloudy, with a low around 36. Southeast wind 6 to 9 mph becoming west southwest after midnight. Winds could gust as high as 15 mph.
Tuesday
A chance of showers between noon and 3pm, then a chance of showers and thunderstorms after 3pm. Increasing clouds, with a high near 55. West southwest wind 5 to 9 mph becoming south southeast in the afternoon. Winds could gust as high as 15 mph. Chance of precipitation is 40%.
Tuesday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 38. South wind 7 to 11 mph becoming west after midnight. Winds could gust as high as 18 mph. Chance of precipitation is 50%.
Wednesday
A 50 percent chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 51. West wind 6 to 13 mph, with gusts as high as 21 mph.
Wednesday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 36. Chance of precipitation is 20%.
Thursday
A chance of showers, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 52. Chance of precipitation is 60%.
Thursday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 37.
Friday
A chance of showers and thunderstorms after noon. Partly sunny, with a high near 53.
Friday Night
A slight chance of showers before midnight. Partly cloudy, with a low around 38. Breezy.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 54. Breezy.
Saturday Night
A slight chance of showers. Mostly cloudy, with a low around 38.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 54.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NW Saint Marys Glacier CO
 39.87°N 105.66°W (Elev. 10620 ft)
12:46 am MDT Sep 21, 2026
11am MDT Sep 21, 2026-6pm MDT Sep 27, 2026
 
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Additional Resources

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