Mesoscale Discussion 0492
   NWS Storm Prediction Center Norman OK
   0702 PM CDT Tue Apr 28 2020

   Areas affected...southwest through central Oklahoma

   Concerning...Severe Thunderstorm Watch 151...

   Valid 290002Z - 290130Z

   The severe weather threat for Severe Thunderstorm Watch 151
   continues.

   SUMMARY...Threat for very large hail and locally strong to damaging
   wind gusts will persist through mid evening from southwest through
   central OK.

   DISCUSSION...Early this evening isolated severe storms including
   some with supercell structures continue developing across central OK
   along a southeast-advancing cold front. The atmosphere is very
   unstable in this region with 3000-3500 J/kg MLCAPE along with steep
   lapse rates and 35-40 kt effective bulk shear. These storms have a
   history of very large hail and damaging gusts. Despite the increase
   in convective inhibition due to boundary-layer cooling, forcing from
   near the front/dryline intersection over southwest OK and northeast
   along the cold front will remain sufficient for thunderstorm
   development through at least mid evening.

   ..Dial.. 04/29/2020

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

   ATTN...WFO...FWD...OUN...

   LAT...LON   34429867 35299786 35739733 35669677 34929652 34169674
               33909807 34429867