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Mesoscale Discussion 114
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   Mesoscale Discussion 0114
   NWS Storm Prediction Center Norman OK
   1231 PM CST Sun Jan 22 2017

   Areas affected...Portions of east-central AL and west-central GA

   Concerning...Tornado Watch 21...

   Valid 221831Z - 221930Z

   The severe weather threat for Tornado Watch 21 continues.

   SUMMARY...A cluster of intense storms will spread across portions of
   east-central AL into west-central GA through mid-afternoon.

   DISCUSSION...A cluster of thunderstorms spreading eastward and
   northeastward across portions of central AL is exhibiting forward
   motion around 35-45 kt, with linear extrapolation suggesting its
   leading edge crossing into GA around 2030-2200Z. This activity is
   evolving within a region of strong deep ascent associated with the
   left-exit region of a midlevel speed maximum. While this activity
   lies to the north of the most unstable air presently confined to
   southern AL/GA, the 18Z Birmingham sounding indicates sufficient
   buoyancy amidst around 60-70 kt of deep shear for a continued severe
   risk with this activity. Damaging winds and tornadoes will be
   possible, especially owing to rapid intensification of the surface
   low in proximity to the area.

   ..Cohen.. 01/22/2017


   LAT...LON   32178638 32768638 33118546 33088466 32758455 32188458
               31888531 31868612 32178638 

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