Mesoscale Discussion 0549
   NWS Storm Prediction Center Norman OK
   0711 PM CDT Sat Apr 27 2024

   Areas affected...southeastern Iowa...northern Missouri...far western
   Illinois

   Concerning...Tornado Watch 147...150...

   Valid 280011Z - 280115Z

   The severe weather threat for Tornado Watch 147, 150 continues.

   SUMMARY...Damaging wind threat increasing. Tornado threat continues
   within WW147 and WW150.

   DISCUSSION...Thunderstorm activity across southeastern Iowa into
   northeastern Missouri has evolved to become more linear, with
   evidence of transient weak embedded mesovortices.  Lightning
   activity has been most productive in the southern portion of the
   line. Potential for damaging winds will increase as this line moves
   northeast, though tornado potential remains. The environment ahead
   of this line remains unstable (with MLCAPE around 1000-2000 J/kg),
   which should support continued severe risk over the next few hours,
   though deep layer shear will tend to decrease with northern extent.

   ..Thornton/Smith.. 04/28/2024

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

   ATTN...WFO...LSX...DVN...DMX...EAX...

   LAT...LON   40059268 39919350 39909353 39969368 40179362 40529300
               41219247 41439241 41819212 42069156 42049110 41679094
               41069096 40749105 40379133 40059191 40059268