National Weather Service United States Department of Commerce

Excessive Rainfall and Flooding Threat in the South; Hazardous Heat in the Western U.S. Expanding to the Northern Plains

Multiple rounds of heavy rain and thunderstorms across portions of the Texas and Louisiana Coast will likely lead to flash, urban, small stream and river flooding. An additional heavy rainfall threat will exist from the Lower Mississippi Valley through the southern Mid-Atlantic. Meanwhile, a dangerous heat threat will continue across the Western U.S. and northern Plains through Thursday. Read More >

A narrow, but intense snowband developed over eastern South Dakota and western Minnesota from mid-morning through early evening on 18 March 2014.  The graphic below shows the extent of the snow band around 1pm CDT.  At this time, the most intense portion of the band was only about 20-30 miles wide, but was producing snowfall rates of 1 to 2 inches per hour!  As a result, a very tight snowfall gradient was observed across the area.  For example, Watertown, SD only picked 0.1" of snow while Clear Lake, SD picked up a whopping 10.5"!  A graphical snowfall map and a few tabular snowfall listings are also provided below.

 

  • Clear Lake, SD - 10.5"
  • 5 SE Revillo, SD - 7.0"
  • Estelline, SD - 6.0"
  • Correll, MN - 6.0"
  • Wheaton, MN - 2.8"
  • Artichoke Lake, MN - 2.0"
  • Milbank, SD - 0.5"
  • Watertown, SD - 0.1"

 

Image 1:  KABR Reflecitivity at 1pm CDT:

 

 

Image 2:  Storm Total Snowfall Graphic: