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

Flash Flood Threats in the Southeast and Rockies; Excessive Heat in the Southwest

Flash and small stream flooding threats linger across the southern Rockies Wednesday. Strong thunderstorms with heavy downpours may cause local flash flooding along portions of the Southeast states into Thursday. Excessive heat will continue to impact the southern California mountains and deserts into Arizona and Nevada into Thursday. Read More >

Hazardous Weather Conditions

Current conditions at

Granby-Grand County Airport (KGNB)

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

Fair

50°F

10°C

Humidity 98%
Wind Speed Calm
Barometer 30.43 in
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 4 Aug 12:15 am MDT
Extended Forecast for

4 Miles W Saint Marys Glacier CO

  • Overnight

    Overnight: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 37. Northwest wind around 9 mph, with gusts as high as 15 mph.

    Chance
    T-storms

    Low: 37 °F

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 9am. Partly sunny, with a high near 50. North northwest wind 8 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.

    Chance
    Showers then
    Chance
    T-storms

    High: 50 °F

  • Wednesday
    Night

    Wednesday Night: Mostly clear, with a low around 39. North wind 7 to 11 mph becoming west after midnight. Winds could gust as high as 18 mph.

    Mostly Clear

    Low: 39 °F

  • Thursday

    Thursday: Sunny, with a high near 54. West northwest wind around 10 mph, with gusts as high as 16 mph.

    Sunny

    High: 54 °F

  • Thursday
    Night

    Thursday Night: Mostly clear, with a low around 43. West southwest wind 9 to 13 mph, with gusts as high as 21 mph.

    Mostly Clear

    Low: 43 °F

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 57. Breezy.

    Breezy. Sunny
    then Chance
    T-storms

    High: 57 °F

  • Friday
    Night

    Friday Night: A 10 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 40. Breezy.

    Breezy.
    Slight Chance
    T-storms then
    Mostly Clear

    Low: 40 °F

  • Saturday

    Saturday: Sunny, with a high near 53. Breezy.

    Sunny and
    Breezy

    High: 53 °F

  • Saturday
    Night

    Saturday Night: Mostly clear, with a low around 40. Breezy.

    Mostly Clear
    and Breezy
    then Mostly
    Clear

    Low: 40 °F

Detailed Forecast

Overnight
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 37. Northwest wind around 9 mph, with gusts as high as 15 mph.
Wednesday
A chance of showers, with thunderstorms also possible after 9am. Partly sunny, with a high near 50. North northwest wind 8 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.
Wednesday Night
Mostly clear, with a low around 39. North wind 7 to 11 mph becoming west after midnight. Winds could gust as high as 18 mph.
Thursday
Sunny, with a high near 54. West northwest wind around 10 mph, with gusts as high as 16 mph.
Thursday Night
Mostly clear, with a low around 43. West southwest wind 9 to 13 mph, with gusts as high as 21 mph.
Friday
A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 57. Breezy.
Friday Night
A 10 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 40. Breezy.
Saturday
Sunny, with a high near 53. Breezy.
Saturday Night
Mostly clear, with a low around 40. Breezy.
Sunday
A slight chance of showers and thunderstorms after noon. Sunny, with a high near 55. Breezy.
Sunday Night
Mostly clear, with a low around 42. Breezy.
Monday
A chance of showers and thunderstorms. Mostly sunny, with a high near 54.
Monday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 42.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 54.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
4 Miles W Saint Marys Glacier CO
 39.84°N 105.72°W (Elev. 12260 ft)
Last Update:
9:21 pm MDT Aug 3, 2021
Forecast Valid:
12am MDT Aug 4, 2021-6pm MDT Aug 9, 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