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 >

Current conditions at

JUDITH PEAK (JPKM8)

Lat: 47.21753°NLon: 109.22281°WElev: 6428.0ft.

NA

61°F

16°C

Humidity 54%
Wind Speed NW 10 MPH
Barometer NA
Dewpoint 44°F (7°C)
Visibility NA
Last update 17 Aug 04:52 AM MDT
Extended Forecast for

Roy MT

  • Today

    Today: A 20 percent chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 83. West wind 6 to 10 mph becoming north northeast in the afternoon.

    High: 83 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and 11pm. Cloudy during the early evening, then gradual clearing, with a low around 59. Southwest wind 12 to 17 mph becoming south southwest 5 to 10 mph in the evening. Winds could gust as high as 26 mph. Chance of precipitation is 40%.

    Low: 59 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Monday

    Monday: A 30 percent chance of showers after noon. Mostly sunny, with a high near 87. West wind around 6 mph becoming southeast in the afternoon.

    High: 87 °F

    Sunny then
    Chance
    Showers

  • Monday Night

    Monday Night: Mostly clear, with a low around 64. North wind around 6 mph becoming south southeast after midnight.

    Low: 64 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 94. South southwest wind around 7 mph becoming east northeast in the afternoon.

    High: 94 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 65. East wind around 7 mph becoming south southwest after midnight.

    Low: 65 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 91. South southwest wind 8 to 10 mph becoming northwest in the afternoon. Winds could gust as high as 18 mph.

    High: 91 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 63. West wind 8 to 10 mph.

    Low: 63 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 83. West wind 6 to 10 mph becoming north northeast in the afternoon.
Tonight
A chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and 11pm. Cloudy during the early evening, then gradual clearing, with a low around 59. Southwest wind 12 to 17 mph becoming south southwest 5 to 10 mph in the evening. Winds could gust as high as 26 mph. Chance of precipitation is 40%.
Monday
A 30 percent chance of showers after noon. Mostly sunny, with a high near 87. West wind around 6 mph becoming southeast in the afternoon.
Monday Night
Mostly clear, with a low around 64. North wind around 6 mph becoming south southeast after midnight.
Tuesday
Sunny, with a high near 94. South southwest wind around 7 mph becoming east northeast in the afternoon.
Tuesday Night
Mostly clear, with a low around 65. East wind around 7 mph becoming south southwest after midnight.
Wednesday
Sunny, with a high near 91. South southwest wind 8 to 10 mph becoming northwest in the afternoon. Winds could gust as high as 18 mph.
Wednesday Night
Partly cloudy, with a low around 63. West wind 8 to 10 mph.
Thursday
Sunny, with a high near 79.
Thursday Night
A slight chance of showers. Partly cloudy, with a low around 56.
Friday
Sunny, with a high near 75.
Friday Night
Mostly clear, with a low around 54.
Saturday
Sunny, with a high near 78.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Roy MT
 47.33°N 108.97°W (Elev. 3566 ft)
Last Update:
3:16 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