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

WINNETT HANDAR (GGWWT)

Lat: 47.01°NLon: 108.36°WElev: 2969.0ft.

NA

88°F

31°C

Humidity 28%
Wind Speed NNW 8 MPH
Barometer NA
Dewpoint 51°F (11°C)
Visibility NA
Heat Index85°F (29°C)
Last update 16 Aug 02:52 PM MDT
Extended Forecast for

Grass Range MT

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 10pm. Mostly cloudy, with a low around 60. East wind 6 to 9 mph becoming west in the evening.

    Low: 60 °F

    Chance
    T-storms then
    Partly Cloudy

  • Sunday

    Sunday: A 30 percent chance of showers, mainly after 4pm. Widespread haze after 3pm. Mostly sunny, with a high near 84. West wind around 7 mph becoming east northeast in the afternoon.

    High: 84 °F

    Mostly Sunny
    then Chance
    Showers

  • Sunday Night

    Sunday Night: A 40 percent chance of showers and thunderstorms before midnight. Widespread haze between 11pm and 2am. Mostly cloudy, with a low around 58. West southwest wind 5 to 7 mph.

    Low: 58 °F

    Chance
    T-storms then
    Haze

  • Monday

    Monday: A slight chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Sunny, with a high near 87. Calm wind becoming south southeast around 6 mph in the afternoon. Chance of precipitation is 20%.

    High: 87 °F

    Sunny then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Mostly clear, with a low around 61. Northeast wind around 6 mph becoming southwest after midnight.

    Low: 61 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 93. West southwest wind 5 to 7 mph becoming east southeast in the afternoon.

    High: 93 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 63. East wind 6 to 8 mph becoming south southwest after midnight.

    Low: 63 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 92. Southwest wind 7 to 10 mph becoming northwest in the afternoon. Winds could gust as high as 18 mph.

    High: 92 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of showers after midnight. Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

Detailed Forecast

Tonight
A 30 percent chance of showers and thunderstorms, mainly before 10pm. Mostly cloudy, with a low around 60. East wind 6 to 9 mph becoming west in the evening.
Sunday
A 30 percent chance of showers, mainly after 4pm. Widespread haze after 3pm. Mostly sunny, with a high near 84. West wind around 7 mph becoming east northeast in the afternoon.
Sunday Night
A 40 percent chance of showers and thunderstorms before midnight. Widespread haze between 11pm and 2am. Mostly cloudy, with a low around 58. West southwest wind 5 to 7 mph.
Monday
A slight chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Sunny, with a high near 87. Calm wind becoming south southeast around 6 mph in the afternoon. Chance of precipitation is 20%.
Monday Night
Mostly clear, with a low around 61. Northeast wind around 6 mph becoming southwest after midnight.
Tuesday
Sunny, with a high near 93. West southwest wind 5 to 7 mph becoming east southeast in the afternoon.
Tuesday Night
Mostly clear, with a low around 63. East wind 6 to 8 mph becoming south southwest after midnight.
Wednesday
Sunny, with a high near 92. Southwest wind 7 to 10 mph becoming northwest in the afternoon. Winds could gust as high as 18 mph.
Wednesday Night
A slight chance of showers after midnight. Partly cloudy, with a low around 62.
Thursday
Sunny, with a high near 81.
Thursday Night
A slight chance of showers. Partly cloudy, with a low around 54.
Friday
Mostly sunny, with a high near 74.
Friday Night
Mostly clear, with a low around 51.
Saturday
Sunny, with a high near 76.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grass Range MT
 47.03°N 108.8°W (Elev. 3533 ft)
Last Update:
2:15 pm MDT Aug 16, 2025
Forecast Valid:
3pm 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