National Weather Service United States Department of Commerce

Enhanced Risk for Severe Thunderstorms Across the Upper Midwest; Flash Flooding Possible from the Upper Midwest to Southern Plains and Desert Southwest Through Friday

Portions of the Upper Midwest will see an increased threat for severe thunderstorms through this evening, with a few strong tornadoes possible. The same region remains on alert for additional flash flood concerns. Heavy rainfall may lead to flash flooding across the Desert Southwest today, and Southern Plains by Friday. Finally, Major-to-record river flooding continues across the Carolinas. Read More >

Significant rainfall fell over much of central and northeastern South Dakota and west-central Minnesota from April 12th through April 16th (see image below).  The highest totals were generally found over the Sisseton Hills/Glacial Lakes area of northeastern South Dakota, where 4" to 5"+ of rainfall has been reported.  Generally 1-3" of rain fell from the Missouri River to the James River Valley - with the lightest amounts across far northwestern South Dakota.  This was the heaviest amount of precipitation since the "Leap Year Blizzard" on 28-29 February 2012.

A few of the highest 5-day rainfall totals - and rainfall at some of the larger cities are listed below:

  • 3.8W Sisseton, SD = 5.60"
  • 7.0N Roy Lake, SD = 4.26"
  • Sisseton, SD Airport = 3.61"
  • Victor, SD = 3.55"
  • Browns Valley, MN = 3.52"
  • Aberdeen, SD = 2.25"
  • Watertown, SD = 1.88"
  • Pierre, SD = 1.83"
  • Mobridge, SD = 1.03"




The map below shows the 5-day event total precipitation for the period April 12th - April 16th.