National Weather Service United States Department of Commerce

Flash flooding possible for parts of Upper Midwest

A slow-moving weather system progressing from the northern Plains to the Great Lakes will bring excessive rainfall and a risk of flash flooding to portions of the Upper Midwest on Friday. The heaviest rainfall is expected from central Iowa northeastward across southeastern Minn. and into Wisc. Rainfall totals of 1-2 inches, with locally-higher amounts, are possible through Saturday morning.
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Hazardous Weather Conditions

Current Conditions

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Afton WY

7 Day Forecast

For More Weather Information:

Riverton, WY Local Forecast Office

Tonight

Isolated Thunderstorms Chance for Measurable Precipitation 20%

Isolated
Thunderstorms

Low: 49 °F

Saturday

Scattered Thunderstorms Chance for Measurable Precipitation 40%

Scattered
Thunderstorms

High: 72 °F

Saturday
Night

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

Low: 44 °F

Sunday

Sunny

Sunny

High: 64 °F

Sunday
Night

Mostly Clear

Mostly
Clear

Low: 41 °F

Labor
Day

Breezy

Breezy

High: 66 °F

Monday
Night

Mostly Clear

Mostly
Clear

Low: 41 °F

Tuesday

Sunny

Sunny

High: 71 °F

Tuesday
Night

Mostly Clear

Mostly
Clear

Low: 44 °F

Detailed Forecast

  • Tonight Isolated showers and thunderstorms before 8pm, then a slight chance of showers and thunderstorms after midnight. Partly cloudy, with a low around 49. West southwest wind 7 to 13 mph becoming south southeast in the evening. Chance of precipitation is 20%.
  • Saturday A slight chance of showers and thunderstorms before 9am, then isolated showers between 9am and noon, then scattered showers and thunderstorms after noon. Some of the storms could produce small hail and gusty winds. Partly sunny, with a high near 72. South southeast wind 11 to 17 mph becoming west southwest in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 40%.
  • Saturday Night A 20 percent chance of showers and thunderstorms. Some of the storms could produce small hail and gusty winds. Mostly cloudy, with a low around 44. South southwest wind 7 to 17 mph, with gusts as high as 26 mph.
  • Sunday Sunny, with a high near 64. West wind 6 to 16 mph, with gusts as high as 24 mph.
  • Sunday Night Mostly clear, with a low around 41. South southwest wind 7 to 16 mph, with gusts as high as 24 mph.
  • Labor Day Mostly sunny, with a high near 66. Breezy, with a west wind 7 to 12 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 31 mph.
  • Monday Night Mostly clear, with a low around 41. West wind 8 to 13 mph becoming light and variable after midnight.
  • Tuesday Sunny, with a high near 71.
  • Tuesday Night Mostly clear, with a low around 44.
  • Wednesday Sunny, with a high near 74.
  • Wednesday Night Partly cloudy, with a low around 45.
  • Thursday Mostly sunny, with a high near 71.
  • Thursday Night Partly cloudy, with a low around 45.
  • Friday Sunny, with a high near 68.