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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5 Miles SSW Lewis Lake WY

7 Day Forecast

For More Weather Information:

Riverton, WY Local Forecast Office

Overnight

Snow Chance for Measurable Precipitation 100%

Snow

Low: 27 °F

Sunday

Snow Chance for Measurable Precipitation 100%

Snow

High: 31 °F

Sunday
Night

Snow Chance for Measurable Precipitation 90%

Snow

Low: 18 °F

Monday

Snow Likely Chance for Measurable Precipitation 60%

Snow
Likely

High: 25 °F

Monday
Night

Slight Chance Snow Chance for Measurable Precipitation 20%

Slight Chc
Snow

Low: -3 °F

Tuesday

Slight Chance Snow Chance for Measurable Precipitation 20%

Slight Chc
Snow

High: 22 °F

Tuesday
Night

Slight Chance Snow Chance for Measurable Precipitation 20%

Slight Chc
Snow

Low: 13 °F

Wednesday

Chance Snow Chance for Measurable Precipitation 40%

Chance
Snow

High: 28 °F

Wednesday
Night

Snow Likely Chance for Measurable Precipitation 70%

Snow
Likely

Low: 18 °F

Detailed Forecast

  • Overnight Snow. Steady temperature around 27. Breezy, with a west southwest wind around 20 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of 4 to 8 inches possible.
  • Sunday Snow with areas of blowing snow. High near 31. Breezy, with a west southwest wind 22 to 25 mph, with gusts as high as 36 mph. Chance of precipitation is 100%. New snow accumulation of 4 to 8 inches possible.
  • Sunday Night Snow with areas of blowing snow before 2am, then snow likely after 2am. Low around 18. Breezy, with a west southwest wind 17 to 21 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.
  • Monday Snow likely, mainly before 11am. Mostly cloudy, with a high near 25. Wind chill values as low as zero. West wind 15 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 60%. New snow accumulation of around an inch possible.
  • Monday Night A 20 percent chance of snow before 11pm. Mostly cloudy, with a low around -3. North wind 5 to 11 mph.
  • Tuesday A 20 percent chance of snow. Partly sunny, with a high near 22. West northwest wind 3 to 8 mph.
  • Tuesday Night A 20 percent chance of snow. Mostly cloudy, with a low around 13. West southwest wind around 5 mph.
  • Wednesday A 40 percent chance of snow. Mostly cloudy, with a high near 28.
  • Wednesday Night Snow likely. Cloudy, with a low around 18. Chance of precipitation is 70%.
  • Christmas Day Snow likely. Cloudy, with a high near 20. Chance of precipitation is 60%.
  • Thursday Night A chance of snow. Cloudy, with a low around 2.
  • Friday A slight chance of snow. Mostly cloudy, with a high near 13.
  • Friday Night A slight chance of snow. Mostly cloudy, with a low around 1.
  • Saturday A slight chance of snow. Mostly cloudy, with a high near 19.