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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18 Miles SW Buffalo 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 50%

Scattered
Thunderstorms

High: 66 °F

Saturday
Night

Chance Thunderstorms Chance for Measurable Precipitation 50%

Chance
Thunderstorms

Low: 43 °F

Sunday

Chance Showers Chance for Measurable Precipitation 40%

Chance
Showers

High: 55 °F

Sunday
Night

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

Low: 40 °F

Labor
Day

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

High: 57 °F

Monday
Night

Partly Cloudy

Partly
Cloudy

Low: 41 °F

Tuesday

Sunny

Sunny

High: 63 °F

Tuesday
Night

Mostly Clear

Mostly
Clear

Low: 45 °F

Detailed Forecast

  • Tonight Isolated showers and thunderstorms before midnight. Partly cloudy, with a low around 49. South wind 8 to 18 mph becoming west after midnight. Winds could gust as high as 28 mph. 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 66. Breezy, with a west wind 18 to 24 mph, with gusts 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 50 percent chance of showers and thunderstorms. Some of the storms could produce small hail and gusty winds. Mostly cloudy, with a low around 43. South wind 8 to 13 mph becoming northwest in the evening.
  • Sunday A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 55. North wind around 7 mph becoming south in the morning. Chance of precipitation is 40%.
  • Sunday Night A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 40. South wind 6 to 9 mph. Chance of precipitation is 20%.
  • Labor Day A slight chance of showers, with thunderstorms also possible after noon. Some of the storms could produce gusty winds. Partly sunny, with a high near 57. South southwest wind around 10 mph. Chance of precipitation is 20%.
  • Monday Night Partly cloudy, with a low around 41. West wind around 10 mph.
  • Tuesday Sunny, with a high near 63.
  • Tuesday Night Mostly clear, with a low around 45.
  • Wednesday Sunny, with a high near 66.
  • Wednesday Night Partly cloudy, with a low around 46.
  • Thursday A slight chance of showers and thunderstorms. Mostly sunny, with a high near 63.
  • Thursday Night A slight chance of showers and thunderstorms. Partly cloudy, with a low around 42.
  • Friday A slight chance of showers and thunderstorms. Mostly sunny, with a high near 58.