Storm Prediction Center Mesoscale Discussion 763

   Mesoscale Discussion 0763
   NWS Storm Prediction Center Norman OK
   0749 PM CDT Sun May 17 2026

   Areas affected...portions of northern Iowa into southern Minnesota

   Concerning...Tornado Watch 216...

   Valid 180049Z - 180145Z

   The severe weather threat for Tornado Watch 216 continues.

   SUMMARY...The threat for severe wind/hail and a few tornadoes
   continues with the stronger storms, particularly those along the
   warm front.

   DISCUSSION...Multicell clusters and supercell structures have
   developed ahead of an elongated QLCS, which have a history of hail,
   low-level rotation, and at least one brief tornado. These storms are
   showing strong rotation as they cross the warm front, where the best
   chance for tornadoes exists due to enhanced SRH in this region. The
   northern end of the QLCS will also approach from the southwest,
   accompanied by a severe wind/hail risk, though a line-embedded
   tornado cannot be ruled out with these storms as well.

   ..Squitieri.. 05/18/2026

   ...Please see www.spc.noaa.gov for graphic product...

   ATTN...WFO...ARX...MPX...DMX...FSD...

   LAT...LON   43799495 44279463 44349366 44149260 43779233 43259218
               42889252 42719319 42709405 42819463 43049504 43799495 

   MOST PROBABLE PEAK TORNADO INTENSITY...100-125 MPH
   MOST PROBABLE PEAK WIND GUST...65-80 MPH
   MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN