Mesoscale Discussion 1671
   NWS Storm Prediction Center Norman OK
   0209 PM CDT Wed Sep 01 2021

   Areas affected...eastern Maryland...Delaware...southern New
   Jersey...far southeast Pennsylvania

   Concerning...Tornado Watch 482...483...

   Valid 011909Z - 012145Z

   The severe weather threat for Tornado Watch 482, 483 continues.

   SUMMARY...A threat for a few tornadoes along with damaging wind
   gusts will shift northeast out of Maryland and into Delaware,
   southern New Jersey, and extreme southeast Pennsylvania.

   DISCUSSION...Surface analysis shows a stationary front across
   northern MD, southeast PA and into southern NJ, with a very moist
   air mass to the south. Given persistent southerly surface winds
   impinging on this front, it is likely that sufficient elevated
   instability exists immediately north of the boundary to support
   severe storms, most likely in the form of an MCS which should travel
   east/northeastward. Damaging winds will be possible with such
   activity, with embedded circulations possible.

   Otherwise, a tornado threat remains on and south of the front, where
   storms will have access to around 2000 J/kg SBCAPE. The tornado risk
   is maximized for northeastward-moving cells, providing maximum SRH
   per 16Z IAD sounding. Other cells moving north/northwestward ahead
   of the consolidating convective line may still yield strong gusts.

   ..Jewell.. 09/01/2021

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

   ATTN...WFO...OKX...PHI...AKQ...CTP...LWX...

   LAT...LON   38877476 38197573 38147598 38257641 38677655 39097656
               39487656 39687656 39927640 40167577 40487485 40587427
               40307390 39837404 39427426 38877476