Mesoscale Discussion 1822
   NWS Storm Prediction Center Norman OK
   1134 PM CDT Tue Aug 20 2019

   Areas affected...Portions of far southeastern WY...far northeastern
   CO...and western/central NE

   Concerning...Severe Thunderstorm Watch 607...

   Valid 210434Z - 210530Z

   The severe weather threat for Severe Thunderstorm Watch 607
   continues.

   SUMMARY...An isolated hail/wind threat continues across far
   southeastern WY into the western NE Panhandle. The need for a
   downstream watch into more of western NE remains unclear.

   DISCUSSION...Storms across far southeastern WY have recently
   strengthened and consolidated into a small cluster, which is
   entering the far western NE Panhandle at 0430Z. In the absence of an
   obvious large-scale forcing mechanism, this uptick in convective
   coverage and intensity may be related to a modest strengthening of
   southerly winds in the 2-3 km layer noted on recent VWPs from KCYS.
   Regardless, this convection will soon encounter a more buoyant
   airmass in western NE, where surface dewpoints gradually increase
   from the low 60s to the low 70s with eastward extent. Some
   short-term guidance suggests that this ongoing cluster will maintain
   its intensity, and perhaps even strengthen as it moves eastward
   overnight across western and eventually central NE. Isolated severe
   winds and large hail remain the primary concerns. At this point, the
   need for a new Severe Thunderstorm Watch downstream of WW 607
   remains unclear. But, trends will be closely monitored.

   ..Gleason.. 08/21/2019

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

   ATTN...WFO...LBF...BOU...CYS...

   LAT...LON   41580479 42110417 42570329 42520070 41570021 40600039
               40550241 40600376 41020474 41580479