National Weather Service United States Department of Commerce

Heavy rain possible for parts of the northern Rockies & Plains; Severe storms for the Upper Midwest

An unseasonably strong storm system in the northwest U.S. will bring showers and thunderstorms, some heavy, to parts of the northern Rockies and northern Plains through Saturday. Isolated flash floods will be possible in these areas. Some of the storms could be severe in parts of the Dakotas into Minnesota, with large hail and damaging winds.
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Hazardous Weather Conditions

Current Conditions

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7 Day Forecast

For More Weather Information:

Riverton, WY Local Forecast Office

Tonight

Heavy Rain Chance for Measurable Precipitation 50%

Heavy
Rain

Low: 52 °F

Saturday

Scattered Showers Chance for Measurable Precipitation 50%

Scattered
Showers

High: 65 °F

Saturday
Night

Scattered Showers Chance for Measurable Precipitation 40%

Scattered
Showers

Low: 44 °F

Sunday

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

High: 59 °F

Sunday
Night

Mostly Cloudy

Mostly
Cloudy

Low: 39 °F

Monday

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

High: 65 °F

Monday
Night

Scattered Showers Chance for Measurable Precipitation 40%

Scattered
Showers

Low: 48 °F

Tuesday

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

High: 67 °F

Tuesday
Night

Partly Cloudy

Partly
Cloudy

Low: 48 °F

Detailed Forecast

  • Tonight Scattered showers and thunderstorms. Some of the storms could produce small hail, gusty winds, and heavy rain. Mostly cloudy, with a low around 52. Northwest wind 6 to 11 mph becoming light and variable after midnight. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
  • Saturday Scattered showers, with thunderstorms also possible after noon. Some of the storms could produce small hail and gusty winds. Partly sunny, with a high near 65. Northwest wind 5 to 10 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 50%.
  • Saturday Night Scattered showers and thunderstorms. Mostly cloudy, with a low around 44. Northwest wind 11 to 18 mph, with gusts as high as 25 mph. Chance of precipitation is 40%. New rainfall amounts between a quarter and half of an inch possible.
  • Sunday A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 59. North northwest wind 10 to 13 mph.
  • Sunday Night Mostly cloudy, with a low around 39. North northwest wind 5 to 8 mph becoming light and variable after midnight.
  • Monday A 20 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 65. Light and variable wind becoming east 5 to 7 mph in the morning.
  • Monday Night Scattered showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 48. Northeast wind 5 to 7 mph. Chance of precipitation is 40%.
  • Tuesday A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 67.
  • Tuesday Night Partly cloudy, with a low around 48.
  • Wednesday Sunny, with a high near 76.
  • Wednesday Night Mostly clear, with a low around 51.
  • Thursday Sunny, with a high near 82.
  • Thursday Night Mostly clear, with a low around 55.
  • Friday Sunny, with a high near 81.