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Mesoscale Discussion 1118
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   Mesoscale Discussion 1118
   NWS Storm Prediction Center Norman OK
   0224 AM CDT Thu Jun 22 2017

   Areas affected...Portions of the central Gulf Coast

   Concerning...Tornado Watch 362...

   Valid 220724Z - 220900Z

   The severe weather threat for Tornado Watch 362 continues.

   SUMMARY...The threat for a few brief tornadoes may persist through
   the remainder of the overnight across much of the region. New watch
   issuance will be coordinated prior to the 08Z expiration of Watch
   362.

   DISCUSSION...Several corridors of convective activity continue early
   this morning from near the center of Tropical Storm Cindy eastward
   to Alabama and the western Florida Panhandle. The easternmost
   convection remains the most likely to pose a tornado threat in the
   near-term, as a broad 40-45kt low-level jet maintains adequate
   effective helicity for occasional mesocyclogenesis. Unlike the
   previous night, a broader region of weak buoyancy exists across the
   region, as the warm front advanced inland and became more diffuse
   with prior diurnal heating. In turn, while the tornado threat is not
   quite as focused, convection stretching from southern Alabama
   southward to the Gulf may still pose a threat for a few brief
   tornadoes.

   Farther west, drier mid-level air has kept convection shallower,
   with little/no CG lightning noted recently. However, some westward
   evolution of the low-level jet maximum may further promote renewed
   activity towards daybreak from southeast Louisiana northward into
   Mississippi. Adequate speed shear in the 0-1km layer and rich
   moisture could yield a threat of brief tornadoes here as well.
   Therefore, with Watch 362 expiring at 08Z, a new watch will be
   coordinated shortly.

   ..Picca.. 06/22/2017

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

   ATTN...WFO...TAE...BMX...MOB...JAN...LIX...

   LAT...LON   29228970 29509014 31039061 31569031 32008943 32298779
               32098612 31348563 30168569 29828777 29128928 29228970 

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Page last modified: June 22, 2017
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