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

FORT PECK DAM (GGWFP)

Lat: 48.0084°NLon: 106.3962°WElev: 2280.0ft.

NA

82°F

28°C

Humidity 50%
Wind Speed SE 17 MPH
Barometer NA
Dewpoint 62°F (17°C)
Visibility NA
Heat Index83°F (28°C)
Last update 16 Aug 05:52 PM MDT
Extended Forecast for

Nashua MT

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 62. East wind 6 to 10 mph, with gusts as high as 18 mph.

    Low: 62 °F

    Slight Chance
    T-storms

  • Sunday

    Sunday: A slight chance of showers before 11am, then a slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 89. East wind around 7 mph becoming west in the afternoon. Chance of precipitation is 20%.

    High: 89 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 64. Northwest wind 5 to 7 mph becoming light and variable after midnight.

    Low: 64 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Monday

    Monday: A slight chance of showers, with thunderstorms also possible after 3pm. Mostly sunny, with a high near 91. East wind 3 to 7 mph. Chance of precipitation is 20%.

    High: 91 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Mostly clear, with a low around 63. East wind 5 to 7 mph.

    Low: 63 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 97. Light east wind becoming south southeast 5 to 9 mph in the morning.

    High: 97 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 67. East southeast wind 7 to 9 mph.

    Low: 67 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 98. East wind 6 to 10 mph becoming south southwest in the afternoon. Winds could gust as high as 18 mph.

    High: 98 °F

    Hot

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 63. West wind 7 to 10 mph becoming north after midnight. Winds could gust as high as 18 mph.

    Low: 63 °F

    Partly Cloudy

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 62. East wind 6 to 10 mph, with gusts as high as 18 mph.
Sunday
A slight chance of showers before 11am, then a slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 89. East wind around 7 mph becoming west in the afternoon. Chance of precipitation is 20%.
Sunday Night
A 30 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 64. Northwest wind 5 to 7 mph becoming light and variable after midnight.
Monday
A slight chance of showers, with thunderstorms also possible after 3pm. Mostly sunny, with a high near 91. East wind 3 to 7 mph. Chance of precipitation is 20%.
Monday Night
Mostly clear, with a low around 63. East wind 5 to 7 mph.
Tuesday
Sunny and hot, with a high near 97. Light east wind becoming south southeast 5 to 9 mph in the morning.
Tuesday Night
Mostly clear, with a low around 67. East southeast wind 7 to 9 mph.
Wednesday
Sunny and hot, with a high near 98. East wind 6 to 10 mph becoming south southwest in the afternoon. Winds could gust as high as 18 mph.
Wednesday Night
Partly cloudy, with a low around 63. West wind 7 to 10 mph becoming north after midnight. Winds could gust as high as 18 mph.
Thursday
Sunny, with a high near 85. Northwest wind 8 to 11 mph, with gusts as high as 20 mph.
Thursday Night
A 20 percent chance of showers. Mostly clear, with a low around 55. North northeast wind 6 to 11 mph, with gusts as high as 18 mph.
Friday
Sunny, with a high near 78.
Friday Night
Mostly clear, with a low around 51.
Saturday
Sunny, with a high near 78.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Nashua MT
 48.13°N 106.36°W (Elev. 2037 ft)
Last Update:
2:01 pm MDT Aug 16, 2025
Forecast Valid:
6pm MDT Aug 16, 2025-6pm MDT Aug 23, 2025
 
Forecast Discussion
 
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Additional Resources

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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