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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9 Miles N Boulder WY

7 Day Forecast

For More Weather Information:

Riverton, WY Local Forecast Office

Today

Isolated Thunderstorms Chance for Measurable Precipitation 20%

Isolated
Thunderstorms

High: 72 °F

Tonight

Isolated Thunderstorms Chance for Measurable Precipitation 20%

Isolated
Thunderstorms

Low: 51 °F

Saturday

Scattered Thunderstorms Chance for Measurable Precipitation 40%

Scattered
Thunderstorms

High: 69 °F

Saturday
Night

Scattered Thunderstorms Chance for Measurable Precipitation 30%

Scattered
Thunderstorms

Low: 47 °F

Sunday

Isolated Thunderstorms Chance for Measurable Precipitation 20%

Isolated
Thunderstorms

High: 63 °F

Sunday
Night

Partly Cloudy

Partly
Cloudy

Low: 44 °F

Labor
Day

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

High: 63 °F

Monday
Night

Partly Cloudy

Partly
Cloudy

Low: 41 °F

Tuesday

Sunny

Sunny

High: 70 °F

Detailed Forecast

  • Today Isolated showers and thunderstorms after 5pm. Mostly sunny, with a high near 72. West northwest wind 8 to 10 mph. Chance of precipitation is 20%.
  • Tonight Isolated showers and thunderstorms before 9pm. Partly cloudy, with a low around 51. West wind 5 to 9 mph becoming light and variable. Chance of precipitation is 20%.
  • Saturday Scattered showers and thunderstorms, mainly after noon. Some of the storms could produce small hail and gusty winds. Partly sunny, with a high near 69. Breezy, with a south southeast wind 7 to 12 mph becoming west southwest 16 to 21 mph in the afternoon. Winds could gust as high as 29 mph. Chance of precipitation is 40%.
  • Saturday Night Scattered showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 47. Breezy, with a west southwest wind 17 to 22 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 30%.
  • Sunday Isolated showers and thunderstorms before noon. Mostly sunny, with a high near 63. West 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 20%.
  • Sunday Night Partly cloudy, with a low around 44. West wind 5 to 15 mph, with gusts as high as 21 mph.
  • Labor Day A 20 percent chance of showers and thunderstorms after noon. Some of the storms could produce gusty winds. Mostly sunny, with a high near 63. West wind 7 to 11 mph.
  • Monday Night Partly cloudy, with a low around 41.
  • Tuesday Sunny, with a high near 70.
  • Tuesday Night Mostly clear, with a low around 45.
  • Wednesday Mostly sunny, with a high near 73.
  • Wednesday Night Partly cloudy, with a low around 47.
  • Thursday Mostly sunny, with a high near 70.