Mesoscale Discussion 0428
   NWS Storm Prediction Center Norman OK
   0617 PM CDT Tue Apr 21 2020

   Areas affected...Western and Central Oklahoma

   Concerning...Severe potential...Severe Thunderstorm Watch likely 

   Valid 212317Z - 220015Z

   Probability of Watch Issuance...95 percent

   SUMMARY...Severe thunderstorm watch will be issued soon to include
   much of western and central Oklahoma. Large hail and damaging winds
   can be expected.

   DISCUSSION...Multiple thunderstorm clusters are maturing across the
   northern TX Panhandle this evening. This activity is expected to
   increase in areal coverage/intensity as it propagates east-southeast
   into western OK over the next few hours. As the LLJ increases across
   OK tonight, a larger complex of potentially severe storms should
   progress southeast toward central OK. Forecast soundings suggest
   hail will be generated with the strongest updrafts. Additionally,
   relatively dry sub-cloud layer suggests damaging winds may also
   develop. CAMs support this scenario and latest HRRR is consistent in
   spreading strong/severe convection toward the I-35 corridor later
   this evening. Supercells and possible bow-type structures can be
   expected.

   ..Darrow/Grams.. 04/21/2020

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

   ATTN...WFO...OUN...AMA...

   LAT...LON   36369958 35659700 34549664 34239791 35140008 36369958