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

Granby-Grand County Airport (KGNB)

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

Light Drizzle

62°F

17°C

Humidity 62%
Wind Speed SE 6 mph
Barometer 30.38 in
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 16 Aug 5:35 pm MDT
Extended Forecast for

3 Miles NE Saint Marys Glacier CO

  • This Afternoon

    This Afternoon: Showers and thunderstorms likely. Mostly cloudy, with a steady temperature around 57. Northwest wind around 6 mph. Chance of precipitation is 60%.

    High: 57 °F

    T-storms
    Likely

  • Tonight

    Tonight: A chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and 11pm. Partly cloudy, with a low around 47. West wind 5 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    Low: 47 °F

    Chance
    T-storms then
    Mostly Clear

  • Sunday

    Sunday: A 40 percent chance of showers and thunderstorms, mainly after 3pm. Mostly sunny, with a high near 64. West wind 5 to 9 mph becoming south southeast in the afternoon. Winds could gust as high as 21 mph.

    High: 64 °F

    Sunny then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 49. West wind 5 to 7 mph, with gusts as high as 17 mph.

    Low: 49 °F

    Partly Cloudy

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 65. West wind around 7 mph becoming east in the afternoon. Winds could gust as high as 17 mph.

    High: 65 °F

    Sunny then
    Chance
    T-storms

  • Monday Night

    Monday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

Detailed Forecast

This Afternoon
Showers and thunderstorms likely. Mostly cloudy, with a steady temperature around 57. Northwest wind around 6 mph. Chance of precipitation is 60%.
Tonight
A chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and 11pm. Partly cloudy, with a low around 47. West wind 5 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Sunday
A 40 percent chance of showers and thunderstorms, mainly after 3pm. Mostly sunny, with a high near 64. West wind 5 to 9 mph becoming south southeast in the afternoon. Winds could gust as high as 21 mph.
Sunday Night
Partly cloudy, with a low around 49. West wind 5 to 7 mph, with gusts as high as 17 mph.
Monday
A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 65. West wind around 7 mph becoming east in the afternoon. Winds could gust as high as 17 mph.
Monday Night
Mostly clear, with a low around 47.
Tuesday
Sunny, with a high near 67.
Tuesday Night
Mostly clear, with a low around 47.
Wednesday
Sunny, with a high near 68.
Wednesday Night
Mostly clear, with a low around 49.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 70.
Thursday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 50.
Friday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 66.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 47.
Saturday
Showers and thunderstorms likely. Partly sunny, with a high near 63.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NE Saint Marys Glacier CO
 39.87°N 105.61°W (Elev. 10597 ft)
Last Update:
2:05 pm MDT Aug 16, 2025
Forecast Valid:
5pm MDT Aug 16, 2025-6pm MDT Aug 23, 2025
 
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