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.

Fair

42°F

6°C

Humidity 92%
Wind Speed Calm
Barometer 30.43 in
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 17 Aug 5:35 am MDT
Extended Forecast for

East Portal CO

  • Today

    Today: A 30 percent chance of showers and thunderstorms, mainly after 3pm. Mostly sunny, with a high near 65. West northwest wind 6 to 11 mph, with gusts as high as 18 mph.

    High: 65 °F

    Sunny then
    Chance
    T-storms

  • Tonight

    Tonight: Partly cloudy, with a low around 47. West wind 5 to 8 mph becoming south southeast in the evening.

    Low: 47 °F

    Partly Cloudy

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms after noon. Increasing clouds, with a high near 66. West wind 6 to 8 mph becoming east in the morning. Winds could gust as high as 16 mph.

    High: 66 °F

    Sunny then
    Chance
    T-storms

  • Monday Night

    Monday Night: Mostly clear, with a low around 46. East southeast wind 6 to 8 mph becoming west after midnight. Winds could gust as high as 15 mph.

    Low: 46 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 68. West wind 7 to 10 mph becoming east in the afternoon. Winds could gust as high as 21 mph.

    High: 68 °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 69.

    High: 69 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 48.

    Low: 48 °F

    Mostly Clear

  • Thursday

    Thursday: A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 70.

    High: 70 °F

    Sunny then
    Slight Chance
    T-storms

Detailed Forecast

Today
A 30 percent chance of showers and thunderstorms, mainly after 3pm. Mostly sunny, with a high near 65. West northwest wind 6 to 11 mph, with gusts as high as 18 mph.
Tonight
Partly cloudy, with a low around 47. West wind 5 to 8 mph becoming south southeast in the evening.
Monday
A 30 percent chance of showers and thunderstorms after noon. Increasing clouds, with a high near 66. West wind 6 to 8 mph becoming east in the morning. Winds could gust as high as 16 mph.
Monday Night
Mostly clear, with a low around 46. East southeast wind 6 to 8 mph becoming west after midnight. Winds could gust as high as 15 mph.
Tuesday
Sunny, with a high near 68. West wind 7 to 10 mph becoming east in the afternoon. Winds could gust as high as 21 mph.
Tuesday Night
Mostly clear, with a low around 47.
Wednesday
Sunny, with a high near 69.
Wednesday Night
Mostly clear, with a low around 48.
Thursday
A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 70.
Thursday Night
A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 48.
Friday
Showers and thunderstorms likely. Partly sunny, with a high near 65.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 46.
Saturday
Showers and possibly a thunderstorm. Partly sunny, with a high near 64.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
East Portal CO
 39.91°N 105.64°W (Elev. 10397 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

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