National Weather Service United States Department of Commerce

Heavy rain and mountain snow across the northwestern U.S. this weekend

A Pacific storm system will continue to impact the Pacific Northwest through late Sunday. Heavy rainfall could lead to flash flooding, river and small stream flooding, as well as mudslides and debris flows, especially over burn scars. At higher elevations, strong winds and heavy snowfall, with accumulations of 1 to 3 feet, could result in hazardous travel through mountain passes.
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Current Conditions

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Casper WY

7 Day Forecast

For More Weather Information:

Riverton, WY Local Forecast Office

Today

Chance Rain/Snow Chance for Measurable Precipitation 30%

Chance
Rain/Snow

High: 7 °C

Tonight

Chance Rain/Snow Chance for Measurable Precipitation 40%

Chance
Rain/Snow

Low: -2 °C

Monday

Chance Snow Chance for Measurable Precipitation 40%

Chance
Snow

High: 0 °C

Monday
Night

Chance Snow Chance for Measurable Precipitation 50%

Chance
Snow

Low: -8 °C

Tuesday

Mostly Sunny

Mostly
Sunny

High: -1 °C

Tuesday
Night

Partly Cloudy

Partly
Cloudy

Low: -6 °C

Wednesday

Breezy

Breezy

High: 3 °C

Wednesday
Night

Chance Snow Chance for Measurable Precipitation 40%

Chance
Snow

Low: -2 °C

Christmas
Day

Chance Snow Chance for Measurable Precipitation 50%

Chance
Snow

High: -2 °C

Detailed Forecast

  • Today A slight chance of snow before 11am, then a chance of rain. Mostly cloudy, with a high near 7. Windy, with a west wind 50 to 55 km/h, with gusts as high as 85 km/h. Chance of precipitation is 30%.
  • Tonight A chance of rain showers before 8pm, then a chance of snow. Mostly cloudy, with a low around -2. Breezy, with a west southwest wind 37 to 42 km/h decreasing to 26 to 31 km/h after midnight. Winds could gust as high as 60 km/h. Chance of precipitation is 40%. New snow accumulation of less than a half centimeter possible.
  • Monday A 40 percent chance of snow. Mostly cloudy, with a high near 0. West wind 26 to 29 km/h becoming north northwest in the afternoon. Winds could gust as high as 40 km/h. New snow accumulation of 1 to 3 centimeters possible.
  • Monday Night A 50 percent chance of snow, mainly before 11pm. Mostly cloudy, with a low around -8. Northwest wind 21 to 26 km/h. New snow accumulation of less than one centimeter possible.
  • Tuesday Mostly sunny, with a high near -1. West wind 16 to 24 km/h, with gusts as high as 34 km/h.
  • Tuesday Night Partly cloudy, with a low around -6. West southwest wind 16 to 21 km/h.
  • Wednesday Mostly sunny, with a high near 3. Breezy, with a southwest wind 26 to 32 km/h.
  • Wednesday Night A 40 percent chance of snow. Mostly cloudy, with a low around -2.
  • Christmas Day A 50 percent chance of snow. Mostly cloudy, with a high near -2.
  • Thursday Night A 40 percent chance of snow. Mostly cloudy, with a low around -11.
  • Friday A slight chance of snow. Partly sunny, with a high near -7.
  • Friday Night Mostly clear, with a low around -14.
  • Saturday Mostly sunny, with a high near -3.