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Mesoscale Discussion 14
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MD 14 graphic

   Mesoscale Discussion 0014
   NWS Storm Prediction Center Norman OK
   0320 AM CST Mon Jan 08 2018

   Areas affected...Portions of northeastern Alabama...northwestern
   Georgia...and eastern Tennessee

   Concerning...Freezing rain 

   Valid 080920Z - 081415Z

   SUMMARY...Generally light freezing rain, perhaps briefly mixed with
   sleet, will develop east from Alabama into Tennessee and Georgia
   this morning. Freezing rain rates of a few hundredths of an inch per
   hour will be possible during the morning commute.

   DISCUSSION...The regional WSR-88D mosaic depicts a rather expansive
   area of precipitation across parts of the Southeast early this
   morning, although reflectivity is inflated in spots due to bright
   banding. Regardless, as mid-level warm advection and related
   isentropic ascent spread east ahead of a trough nearing the lower
   Mississippi Valley, precipitation will gradually spread across the
   remainder of northeast Alabama and adjacent portions of Tennessee
   and Georgia through sunrise. 

   Recent Huntsville, AL (KHTX) correlation coefficient data indicate
   some descent of the melting layer near/along the leading edge of
   this precipitation shield, which would suggest a brief/spotty
   potential for ice pellets. This notion is also suggested by the
   initially dry profile from the surface through approximately 700 mb
   (as depicted by the observed 06Z FFC/Peachtree City, GA sounding).
   However, continued warming/moistening atop a shallow sub-freezing
   surface layer will likely support light freezing rain as the
   dominant precipitation type this morning. In turn, rates up to a few
   hundredths of an inch per hour will be possible through the morning

   ..Picca.. 01/08/2018

   ...Please see for graphic product...


   LAT...LON   35088438 33988446 33908451 33648486 33538512 33448556
               33518597 33948616 34258628 34588642 35138643 35518627
               35718610 35978585 36268549 36378515 36268478 36098459
               35278442 35088438 

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