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Mesoscale Discussion 848
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   Mesoscale Discussion 0848
   NWS Storm Prediction Center Norman OK
   0614 PM CDT Fri May 26 2017

   Areas affected...South-central/southeast Wyoming...southwest
   Nebraska Panhandle...eastern Colorado

   Concerning...Severe Thunderstorm Watch 268...

   Valid 262314Z - 270115Z

   The severe weather threat for Severe Thunderstorm Watch 268
   continues.

   SUMMARY...Scattered severe thunderstorms producing large hail,
   damaging winds, and possibly a tornado will continue into the early
   evening with a tendency for storms to increase somewhat in coverage
   with time.  A downstream watch will likely be needed to the east of
   the watch by 00Z.

   DISCUSSION...Widely scattered severe thunderstorms were in progress
   at 23Z/1700 MDT across the watch area from the southwest Nebraska
   Panhandle south across eastern Colorado.  The severe threat will
   continue through the early evening given 40-50 kts of effective
   shear and around 1000-locally 2000 j/kg of MLCAPE and steep
   mid-level lapse rates. Some strengthening of the surface winds have
   occurred across eastern Colorado over the past couple of hours, and
   thus some tornado threat will exist with favorable low-level shear. 
   As the low-level jet intensifies to 40-45 kts this evening, storms
   should tend to develop into one or two clusters with a continued
   severe wind and hail risk.  Given current motion, storms should
   approach the eastern edge of WW 268 prior to 00Z and a new severe
   thunderstorm watch will likely be needed by 00Z across western
   Kansas and southwest Nebraska.

   ..Bunting/Guyer.. 05/26/2017

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

   ATTN...WFO...LBF...DDC...GLD...PUB...BOU...CYS...

   LAT...LON   40760492 41640399 41800296 41650169 40930121 39900059
               38040050 37280082 37060171 37120239 37370350 38040432
               39050487 40760492 

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