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Flood warnings issued as southern Minnesota rivers rise, with more heavy storms coming

Another round of strong/severe storms is expected later Monday.

Multiple bouts of heavy rain deluged parts of southern Minnesota Sunday and early Monday. All of the water – as much as 7 inches in some cases – have caused a rise in river levels that's led to a bevy of flood warnings issued by the National Weather Service. 

"Widespread precipitation on Sunday brought significant accumulations to our forecast area, especially southwest Minnesota. Over the last 24 hours, 3 to 5 inches of rain fell in southwest Minnesota causing rapid rises for the local rivers. Additionally, rain is expected again today as more widespread strong convection is forecast. We will continue to monitor for any changes to the precipitation forecast."

Here are the latest warnings, as of 10:45 a.m.: 

Minnesota River At Morton: 

  • River level: 22.2 feet at 8:30 a.m. (flood stage is 21 feet). 
  • River will reach 24.4 feet by Wednesday morning, causing street flooding in parts of Redwood Falls. 

Cottonwood River above Springfield: 

  • River level: 17.0 feet at 8:30 a.m. (flood stage is 22.0 feet)
  • River will rise above flood stage by Tuesday morning, and reach 25.3 feet by Wednesday afternoon. 

Minnesota River at Montevideo: 

  • River level: 11.2 feet at 9 a.m. (flood stage is 14.0 feet)
  • River will rise to 14.9 feet by Friday morning, flooding low-lying areas and basements in houses along the river. 

Redwood River near Redwood Falls:

  • River level: 5.1 feet at 8:30 a.m. (flood stage is 6.0 feet)
  • River will rise to near 9.9 feet by Thursday morning. At 8.5 feet, the Swayback bridge in Redwood Falls will be under water. 

Cottonwood River at New Ulm:

  • River level: 8.0 feet at 9 a.m. (flood stage is 11.0 feet)
  • River will rise to near 15.1 feet by Thursday evening. 

Redwood River near Marshall: 

  • River level: 10.43 feet at 9 a.m. (flood stage is 14.0 feet)
  • River will rise to near 14.5 feet on Wednesday, causing minor flooding in low-lying areas outside of Marshall. 

Trempelaleau River at Dodge: 

  • River level: 9.9 feet at 6:45 a.m. (flood stage is 10.5 feet)
  • River will rise to flood stage by Tuesday morning. 

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Meanwhile, the following counties are in flood warnings: Redwood County, western Sibley County, Yellow Medicine County, north-central Brown County, and southern Renville County, west-central Winona County and east-central Olmsted County. 

Cities impacted by those warnings include Redwood Falls, Canby, Fairfax, Morgan, Walnut Grove, Lamberton, Gibbon, Wabasso, Franklin, Wood Lake, Morton and Hanley Falls. 

The simulated future radar from the HRRR computer model shows more strong-to-severe storms blowing up over southern Minnesota and moving east this afternoon and evening. 

hrrr_ref_frzn_ncus_fh1-18 (11)

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