Mesoscale Discussion 1743
   NWS Storm Prediction Center Norman OK
   0902 PM CDT Sun Oct 11 2020

   Areas affected...eastern Nebraska and far western Iowa

   Concerning...Severe Thunderstorm Watch 500...

   Valid 120202Z - 120400Z

   The severe weather threat for Severe Thunderstorm Watch 500
   continues.

   SUMMARY...The potential for severe wind will continue for portions
   of central Minnesota as well as eastern Nebraska and far western
   Iowa through at least 03 UTC.

   DISCUSSION...Recent radar trends from MN show an organized squall
   line, which suggests that 40-45 knot effective bulk shear is
   compensating for relatively weak (around 500 J/kg MLCAPE)
   instability. Convection will likely begin to diminish as it moves
   eastward into the cool side of a diffuse surface warm front, but
   will continue to pose a severe wind potential in the near term
   (through at least 03 UTC) for central MN. With temperatures in the
   mid 60s (and dewpoints in the 40s) across eastern MN, a downstream
   watch is not anticipated at this time. 

   Further south, the cold front has overtaken the main line of storms
   per recent surface and radar observations from KOAX. This will
   further favor a linear storm mode for the rest of the evening.
   Despite increasing inhibition from nocturnal cooling, stronger
   ascent associated with the cold front should maintain convection for
   the next few hours. Downward trends in MRMS vertically integrated
   ice and warming IR cloud top temperatures, combined with a
   transition to a linear storm mode, suggest a downward trend in the
   hail potential overall, though a few instances of severe hail can
   not be ruled out with any stronger updraft pulses. Although severe
   wind is possible along the entirety of the line, portions of
   southeast NE may see a locally higher wind threat associated with
   accelerating convection along the cold frontal surge.

   ..Moore/Dial.. 10/12/2020

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

   ATTN...WFO...MPX...DMX...FSD...OAX...GID...

   LAT...LON   40979791 42009666 42409634 42849593 43769563 44629550
               45269523 45759511 45929479 45859429 45329389 44969383
               44489390 43889416 43149459 42549494 41999520 41659539
               41169556 40739560 40459611 40429688 40569759 40979791