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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Yankton SD

7 Day Forecast

For More Weather Information:

Sioux Falls, SD Local Forecast Office

This
Afternoon

Chance Thunderstorms Chance for Measurable Precipitation 30%

Chance
Thunderstorms

High: 79 °F

Tonight

Patchy Fog

Patchy
Fog

Low: 61 °F

Saturday

Patchy Fog

Patchy
Fog

High: 83 °F

Saturday
Night

Chance Thunderstorms Chance for Measurable Precipitation 30%

Chance
Thunderstorms

Low: 66 °F

Sunday

Heavy Rain Chance for Measurable Precipitation 80%

Heavy
Rain

High: 80 °F

Sunday
Night

Heavy Rain Chance for Measurable Precipitation 80%

Heavy
Rain

Low: 58 °F

Labor
Day

Mostly Sunny

Mostly
Sunny

High: 78 °F

Monday
Night

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

Low: 57 °F

Tuesday

Mostly Sunny

Mostly
Sunny

High: 79 °F

Detailed Forecast

  • This Afternoon A chance of showers and thunderstorms, mainly before 3pm. Mostly cloudy, with a high near 79. North northwest wind around 5 mph. Chance of precipitation is 30%.
  • Tonight Patchy fog after 4am. Otherwise, partly cloudy, with a low around 61. Northwest wind around 5 mph.
  • Saturday Patchy fog before 9am. Otherwise, mostly sunny, with a high near 83. Northwest wind 5 to 10 mph becoming southeast in the afternoon.
  • Saturday Night A chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 66. South southeast wind 10 to 15 mph. Chance of precipitation is 30%.
  • Sunday Occasional showers and thunderstorms, mainly after 1pm. Some of the storms could produce heavy rain. High near 80. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.
  • Sunday Night Occasional showers and thunderstorms, mainly before 1am. Some of the storms could produce heavy rain. Low around 58. Chance of precipitation is 80%.
  • Labor Day Mostly sunny, with a high near 78.
  • Monday Night A slight chance of showers and thunderstorms. Partly cloudy, with a low around 57. Chance of precipitation is 20%.
  • Tuesday Mostly sunny, with a high near 79.
  • Tuesday Night Mostly clear, with a low around 61.
  • Wednesday Sunny, with a high near 82.
  • Wednesday Night A slight chance of showers and thunderstorms. Partly cloudy, with a low around 66. Chance of precipitation is 20%.
  • Thursday Mostly sunny, with a high near 87.