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Mesoscale Discussion 1179
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   Mesoscale Discussion 1179
   NWS Storm Prediction Center Norman OK
   0623 PM CDT Fri Jul 27 2018

   Areas affected...southeast Wyoming...southwest Nebraska...eastern
   Colorado and western Kansas

   Concerning...Tornado Watch 315...

   Valid 272323Z - 280100Z

   The severe weather threat for Tornado Watch 315 continues.

   SUMMARY...Threat for a couple tornadoes, isolated large hail, and
   damaging wind will persist across WW 315 next couple hours. A more
   substantial severe/damaging wind threat may evolve over the
   southeastern portion of WW 315 and into severe thunderstorm watch
   317 from east central Colorado through western KS into mid-evening.

   DISCUSSION...Early this evening, numerous storms are developing
   along a what appears to be a convectively reinforced boundary from
   north central KS into northeast CO. Mostly discrete supercell
   structures persist over KS. However, there has been a tendency for
   storms to congeal into a small cluster across northeast CO. The
   atmosphere across southeast CO into western KS remains moderately
   unstable with 1500-2000 J/kg MLCAPE and is weakly capped. This along
   with a strengthening southerly nocturnal low-level jet will continue
   to support development along the consolidated outflows, and tendency
   should be for storms to grow upscale into a southward-advancing MCS.
   While large hail, and a couple tornadoes remain possible in the
   short term, greatest severe threat should transition to damaging

   Farther north across the remainder of tornado watch 315 from
   southeast WY into western NE and far northeast CO, much of the
   boundary layer has been stabilized by convective outflow. However,
   latest objective analysis indicates the presence of moderate MUCAPE
   for parcels lifted from above the surface layer. Therefore storms
   over southeast WY will remain capable of producing mainly large hail
   as they move southeast and become elevated over top of the stable
   layer next couple hours.

   ..Dial.. 07/27/2018

   ...Please see for graphic product...


   LAT...LON   37689925 37590105 38480275 39290275 39160040 38829932

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