Heavy rain across portions of the tri-state area on April 6-7, 2006

A strong low pressure system moved across Nebraska last night.  Widespread thunderstorms developed in eastern Nebraska and moved north into eastern South Dakota, northwest Iowa, and southwest Minnesota during the evening.  As the storms waned toward midnight, a band of moderate to heavy rain developed along Interstate 90 from near Mitchell, South Dakota to Jackson, Minnesota.  This band of rain remained nearly stationary for 4 or 5 hours producing one third to one half inch of rain per hour.  The result was 2 to 4 inches of rain in a narrow band along interstate 90.  A map with radar estimates and reports is below. 

This heavy rainfall resulted in rises in rivers around Sioux Falls as well as near Hardwick, Minnesota on Friday morning.  See associated news story with additional information in the Sioux Falls area.  In Minnesota, the West Fork of the Des Moines River near Jackson Minnesota also rose above flood stage on Friday morning.  Here are links to the latest river readings from  the Des Moines River in Jackson, Minnesota and Windom, Minnesota. 

While the heaviest rainfall remained north of Spencer, Iowa, there was signficant rainfall across Dickinson County.  This will mean more rises on the Little Sioux River in Spencer and Linn Grove.  There will also be rises on the Ocheyedan River near Spencer, Iowa.  Here is a link to the latest river stage and forecast for the Little Sioux in Milford, IowaSpencer, Iowa; and Linn Grove, Iowa.  Here is a link to the latest river stage and forecast for the Ocheyedan River near Spencer, Iowa. 

Finally, heavy rain Thursday into Thursday evening north of Huron will result in rises on the James River from Huron, South Dakota to Yankton, South Dakota.  At this time, only Huron is expected to exceed flood stage but persons near the James River will want to stay informed on the latest river forecasts.  Here are the links for the river forecasts for Huron, South Dakota; Forestburg, South Dakota; Mitchell, South Dakota; and Scotland, South Dakota.

Here is a graphic of the radar estimated rainfall and observed rainfall across the area. Click on the map for an enlarged image.  Below the graphic is a table with specific sites.

Radar rainfall estimates and observed rainfall from April 6-7, 2006.  Click on image to enlarge.

Observed rainfall ending at 8 AM Friday, April 7, 2006.
Crooks, South Dakota 4.83
Hartford, South Dakota 4.25
EROS Data Center, 14 miles NE of Sioux Falls, South Dakota 3.52
Sioux Falls, South Dakota (airport) 3.36
Sibley, Iowa 3.10
Akron, Iowa 3.10
Wall Lake, South Dakota 3.07
Worthington, Minnesota 2.73
White Lake, South Dakota 2.45
Sioux Falls, South Dakota (east side) 2.45
Heron Lake, Minnesota 2.42
Salem, South Dakota 2.37
Alcester, South Dakota


Jackson, Minnesota 2.34
Lakefield, Minnesota 2.23
Dell Rapids, South Dakota 2.21
Fairfax, South Dakota 2.20
Yankton, South Dakota 2.15
Mitchell, South Dakota 2.05
Buffalo Trading Post, South Dakota 2.04
Geddes, South Dakota 1.79
Parker, South Dakota 1.79
Pickstown, South Dakota 1.76
Ocheyedan, Iowa 1.67
Lake Park, Iowa 1.64
Spirit Lake, Iowa 1.58
Rock Valley, Iowa 1.58
Luverne, Minnesota 1.57
Chester, South Dakota 1.54
Vermillion South Dakota 1.48
Forestburg, South Dakota 1.48
Shagbark, Hills, Iowa (near Correctionville) 1.40
Windom, Minnesota 1.32
Orange City, Iowa 1.21
Broken Kettle, Iowa (western Plymouth County 1.11
Sheldon, Iowa 1.10
Centerville, South Dakota 1.08
Correctionville, Iowa 0.97
Everly, Iowa 0.91
Holstein, Iowa 0.87
James, Iowa 0.84
Chamberlain, South Dakota 0.83
Marty, South Dakota 0.76
Linn Grove, Iowa 0.74
Holly Springs, Iowa 0.74
Sioux City, Iowa, (downtown) 0.72
Spencer, Iowa 0.69
Sioux City, Iowa (airport) 0.68
Huron, South Dakota 0.56
South Sioux City, Nebraska 0.40
Galva, Iowa 0.40
Emerson, Nebraska 0.40
Flandreau, South Dakota 0.24
Cherokee, Iowa 0.18
Storm Lake, Iowa 0.18
Pipestone, Minnesota 0.15
Tracy, Minnesota 0.07
Carthage, South Dakota 0.02

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