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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Current Conditions

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4 Miles W Lyons CO

7 Day Forecast

For More Weather Information:

Denver-Boulder, CO Local Forecast Office

This
Afternoon

Chance Thunderstorms Chance for Measurable Precipitation 30%

Chance
Thunderstorms

High: 76 °F

Tonight

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

Low: 52 °F

Saturday

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

High: 78 °F

Saturday
Night

Slight Chance Thunderstorms Chance for Measurable Precipitation 10%

Slight Chc
Thunderstorms

Low: 55 °F

Sunday

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

High: 73 °F

Sunday
Night

Partly Cloudy

Partly
Cloudy

Low: 51 °F

Labor
Day

Sunny

Sunny

High: 72 °F

Monday
Night

Partly Cloudy

Partly
Cloudy

Low: 53 °F

Tuesday

Sunny

Sunny

High: 74 °F

Detailed Forecast

  • This Afternoon A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 76. North wind around 6 mph.
  • Tonight A 20 percent chance of showers and thunderstorms before 11pm. Partly cloudy, with a low around 52. Light and variable wind becoming west 5 to 8 mph after midnight.
  • Saturday A 20 percent chance of showers and thunderstorms after 11am. Mostly sunny, with a high near 78. West wind 6 to 11 mph, with gusts as high as 18 mph.
  • Saturday Night A 10 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 55. West southwest wind around 10 mph, with gusts as high as 16 mph.
  • Sunday A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 73. Breezy, with a west wind 10 to 15 mph, with gusts as high as 23 mph.
  • Sunday Night Partly cloudy, with a low around 51.
  • Labor Day Sunny, with a high near 72.
  • Monday Night Partly cloudy, with a low around 53.
  • Tuesday Sunny, with a high near 74.
  • Tuesday Night Mostly clear, with a low around 56.
  • Wednesday Sunny, with a high near 76.
  • Wednesday Night Partly cloudy, with a low around 57.
  • Thursday A slight chance of showers and thunderstorms. Mostly sunny, with a high near 76.