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

Casper, Natrona County International Airport (KCPR)

Lat: 42.8975°NLon: 106.47306°WElev: 5348.0ft.

Clear

64°F

18°C

Humidity 55%
Wind Speed SW 8 MPH
Barometer 30.1 in (1019.3 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 16 Aug 10:35 PM MDT
Extended Forecast for

Powder River WY

  • Tonight

    Tonight: Partly cloudy, with a low around 58. Southwest wind 5 to 8 mph.

    Low: 58 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. Breezy, with a west southwest wind 7 to 15 mph, with gusts as high as 23 mph.

    High: 85 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms and
    Breezy

  • Sunday Night

    Sunday Night: A 10 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 54. South southwest wind 6 to 10 mph becoming northeast in the evening.

    Low: 54 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 89. West wind 6 to 10 mph, with gusts as high as 22 mph.

    High: 89 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 55. West northwest wind 5 to 10 mph becoming northeast in the evening.

    Low: 55 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 93. Light and variable wind becoming west northwest 5 to 8 mph in the afternoon.

    High: 93 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 57. East northeast wind 7 to 9 mph becoming south southeast after midnight.

    Low: 57 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 58. Southwest wind 5 to 8 mph.
Sunday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. Breezy, with a west southwest wind 7 to 15 mph, with gusts as high as 23 mph.
Sunday Night
A 10 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 54. South southwest wind 6 to 10 mph becoming northeast in the evening.
Monday
Sunny, with a high near 89. West wind 6 to 10 mph, with gusts as high as 22 mph.
Monday Night
Mostly clear, with a low around 55. West northwest wind 5 to 10 mph becoming northeast in the evening.
Tuesday
Sunny, with a high near 93. Light and variable wind becoming west northwest 5 to 8 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 57. East northeast wind 7 to 9 mph becoming south southeast after midnight.
Wednesday
Sunny, with a high near 95.
Wednesday Night
Mostly clear, with a low around 59.
Thursday
Sunny, with a high near 89.
Thursday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 56.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 84.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 53.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 84.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Powder River WY
 43.03°N 106.98°W (Elev. 5778 ft)
Last Update:
9:28 pm MDT Aug 16, 2025
Forecast Valid:
10pm MDT Aug 16, 2025-6pm MDT Aug 23, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation