National Weather Service United States Department of Commerce

Heavy rain possible for the northern Rockies & Plains; severe storms for the Northern Plains

An unseasonably strong storm system in the northwest U.S. will bring showers and thunderstorms, with locally heavy rainfall, to the northern Rockies and northern Plains. Isolated flash floods will be possible in these areas. Some storms could become severe in parts of the Dakotas into Minnesota, with large hail and damaging winds. In addition, temperatures will be 10 to 20 degrees below average.
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Current Conditions

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20 Miles N Arminto WY

7 Day Forecast

For More Weather Information:

Riverton, WY Local Forecast Office

This
Afternoon

Scattered Showers Chance for Measurable Precipitation 50%

Scattered
Showers

High: 52 °F

Tonight

Rain/Snow Likely Chance for Measurable Precipitation 70%

Rain/Snow
Likely

Low: 38 °F

Sunday

Isolated Showers Chance for Measurable Precipitation 20%

Isolated
Showers

High: 53 °F

Sunday
Night

Breezy

Breezy

Low: 38 °F

Monday

Scattered Showers Chance for Measurable Precipitation 40%

Scattered
Showers

High: 62 °F

Monday
Night

Scattered Showers Chance for Measurable Precipitation 40%

Scattered
Showers

Low: 39 °F

Tuesday

Thunderstorms Likely Chance for Measurable Precipitation 60%

Thunderstorms
Likely

High: 54 °F

Tuesday
Night

Chance Thunderstorms Chance for Measurable Precipitation 40%

Chance
Thunderstorms

Low: 41 °F

Wednesday

Slight Chance Showers Chance for Measurable Precipitation 20%

Slight Chc
Showers

High: 62 °F

Detailed Forecast

  • This Afternoon Scattered showers and thunderstorms. Mostly cloudy, with a high near 52. West northwest wind 14 to 16 mph, with gusts as high as 23 mph. Chance of precipitation is 50%.
  • Tonight Rain showers likely before 3am, then scattered rain and snow showers. Some thunder is also possible. Mostly cloudy, with a low around 38. Windy, with a west northwest wind 18 to 23 mph increasing to 27 to 32 mph after midnight. Winds could gust as high as 45 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
  • Sunday Isolated showers before noon. Partly sunny, with a high near 53. Windy, with a west northwest wind 31 to 36 mph decreasing to 21 to 26 mph in the afternoon. Winds could gust as high as 49 mph. Chance of precipitation is 20%.
  • Sunday Night Partly cloudy, with a low around 38. Breezy, with a south southwest wind 15 to 21 mph, with gusts as high as 29 mph.
  • Monday Isolated showers, then scattered showers and thunderstorms after noon. Partly sunny, with a high near 62. Breezy, with a southwest wind 15 to 20 mph decreasing to 8 to 13 mph in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 40%.
  • Monday Night Scattered showers and thunderstorms. Mostly cloudy, with a low around 39. Breezy, with a south southeast wind 13 to 18 mph becoming east southeast 21 to 26 mph after midnight. Winds could gust as high as 37 mph. Chance of precipitation is 40%.
  • Tuesday Showers likely, with thunderstorms also possible after noon. Mostly cloudy, with a high near 54. West wind around 9 mph. Chance of precipitation is 60%.
  • Tuesday Night A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 41.
  • Wednesday A 20 percent chance of showers. Mostly sunny, with a high near 62.
  • Wednesday Night Mostly clear, with a low around 45.
  • Thursday Sunny, with a high near 69.
  • Thursday Night Mostly clear, with a low around 49.
  • Friday Mostly sunny, with a high near 69.