National Weather Service United States Department of Commerce

On Saturday, severe weather will be possible across portions of the northern Plains while dry and hot conditions begin returning to the West.

Severe weather is possible over parts of the northern Plains on Saturday. During the late afternoon and early evening hours, large hail and isolated tornadoes will be the primary threats with damaging winds becoming the greatest threat in the late evening hours. Out west, hot and dry conditions begin to return bringing increased heat dangers and fire weather concerns.
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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

Tonight

Scattered Showers Chance for Measurable Precipitation 40%

Scattered
Showers

Low: 43 °F

Saturday

Scattered Thunderstorms Chance for Measurable Precipitation 50%

Scattered
Thunderstorms

High: 59 °F

Saturday
Night

Chance Thunderstorms Chance for Measurable Precipitation 30%

Chance
Thunderstorms

Low: 37 °F

Sunday

Mostly Sunny

Mostly
Sunny

High: 52 °F

Sunday
Night

Slight Chance Snow Chance for Measurable Precipitation 20%

Slight Chc
Snow

Low: 33 °F

Labor
Day

Breezy

Breezy

High: 54 °F

Monday
Night

Partly Cloudy

Partly
Cloudy

Low: 34 °F

Tuesday

Sunny

Sunny

High: 58 °F

Tuesday
Night

Mostly Clear

Mostly
Clear

Low: 35 °F

Detailed Forecast

  • Tonight Scattered showers and thunderstorms, mainly after midnight. Mostly cloudy, with a low around 43. Southwest wind 9 to 11 mph. Chance of precipitation is 40%.
  • Saturday Scattered showers and thunderstorms. Some of the storms could produce small hail and gusty winds. Mostly cloudy, with a high near 59. Breezy, with a southwest wind 9 to 14 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 37 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
  • Saturday Night A 30 percent chance of showers and thunderstorms, mainly before midnight. Some of the storms could produce small hail and gusty winds. Mostly cloudy, with a low around 37. Breezy, with a southwest wind 16 to 21 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 31 mph.
  • Sunday Mostly sunny, with a high near 52. West southwest wind 5 to 10 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 28 mph.
  • Sunday Night A 20 percent chance of snow showers after midnight. Mostly cloudy, with a low around 33. Southwest wind 13 to 18 mph, with gusts as high as 28 mph.
  • Labor Day Partly sunny, with a high near 54. Breezy, with a southwest wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 31 mph.
  • Monday Night Partly cloudy, with a low around 34. Southwest wind 7 to 14 mph, with gusts as high as 20 mph.
  • Tuesday Sunny, with a high near 58.
  • Tuesday Night Mostly clear, with a low around 35.
  • Wednesday Mostly sunny, with a high near 61.
  • Wednesday Night A slight chance of rain and snow showers. Some thunder is also possible. Partly cloudy, with a low around 37.
  • Thursday A chance of showers and thunderstorms. Partly sunny, with a high near 58.
  • Thursday Night A slight chance of rain and snow showers. Some thunder is also possible. Mostly cloudy, with a low around 37.
  • Friday A slight chance of showers and thunderstorms. Partly sunny, with a high near 58.