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 West Coast through 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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9 Miles W Wapiti WY

7 Day Forecast

For More Weather Information:

Riverton, WY Local Forecast Office

Overnight

Chance Snow Chance for Measurable Precipitation 40%

Chance
Snow

Low: 37 °F

Sunday

Rain/Snow Likely Chance for Measurable Precipitation 70%

Rain/Snow
Likely

High: 43 °F

Sunday
Night

Rain/Snow Likely Chance for Measurable Precipitation 70%

Rain/Snow
Likely

Low: 29 °F

Monday

Chance Snow Chance for Measurable Precipitation 50%

Chance
Snow

High: 34 °F

Monday
Night

Slight Chance Snow Chance for Measurable Precipitation 20%

Slight Chc
Snow

Low: 11 °F

Tuesday

Partly Sunny

Partly
Sunny

High: 30 °F

Tuesday
Night

Slight Chance Snow Chance for Measurable Precipitation 20%

Slight Chc
Snow

Low: 20 °F

Wednesday

Slight Chance Rain/Snow Chance for Measurable Precipitation 20%

Slight Chc
Rain/Snow

High: 38 °F

Wednesday
Night

Chance Snow Chance for Measurable Precipitation 50%

Chance
Snow

Low: 24 °F

Detailed Forecast

  • Overnight A 40 percent chance of snow. Mostly cloudy, with a steady temperature around 37. Breezy, with a west wind around 28 mph, with gusts as high as 38 mph. Total nighttime snow accumulation of less than a half inch possible.
  • Sunday Snow likely before 11am, then rain and snow likely between 11am and 2pm, then rain likely after 2pm. Cloudy, with a high near 43. Windy, with a west wind 31 to 36 mph increasing to 38 to 43 mph in the afternoon. Winds could gust as high as 60 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
  • Sunday Night Rain and snow likely, becoming all snow after 8pm. Cloudy, with a low around 29. Windy, with a west wind 31 to 36 mph decreasing to 22 to 27 mph after midnight. Winds could gust as high as 49 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
  • Monday A 50 percent chance of snow, mainly before 11am. Mostly cloudy, with a high near 34. Breezy, with a west northwest wind 17 to 21 mph, with gusts as high as 29 mph. New snow accumulation of less than a half inch possible.
  • Monday Night A 20 percent chance of snow. Mostly cloudy, with a low around 11. West wind 10 to 14 mph.
  • Tuesday Partly sunny, with a high near 30. West wind around 11 mph.
  • Tuesday Night A 20 percent chance of snow before 11pm. Mostly cloudy, with a low around 20. West wind around 10 mph.
  • Wednesday A slight chance of rain and snow. Partly sunny, with a high near 38. Chance of precipitation is 20%.
  • Wednesday Night A 50 percent chance of snow. Cloudy, with a low around 24.
  • Christmas Day A 50 percent chance of snow. Mostly cloudy, with a high near 28.
  • Thursday Night A slight chance of snow. Mostly cloudy, with a low around 6.
  • Friday A slight chance of snow. Partly sunny, with a high near 20.
  • Friday Night Partly cloudy, with a low around 9.
  • Saturday Partly sunny, with a high near 28.