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Mesoscale Discussion 13
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   Mesoscale Discussion 0013
   NWS Storm Prediction Center Norman OK
   1200 AM CST Mon Jan 08 2018

   Areas affected...Portions of far eastern IN...much of OH...and
   northern KY

   Concerning...Freezing rain 

   Valid 080600Z - 081200Z

   SUMMARY...Freezing rain will spread eastward overnight, with rates
   of at least 0.05 inch per 3 hours likely. A transition to
   light/moderate snow should eventually occur for most areas.

   DISCUSSION...A light to moderate precipitation shield will move
   eastward across eastern IN, much of OH, and parts of northern KY
   overnight in association with a shortwave trough over the MS Valley.
   Based off of upstream observations across IN and due to low-level
   warm air advection across this region, freezing rain should be the
   primary initial precipitation type. 06Z surface temperatures across
   most of OH are cooler than IN owing to a residual cold/dry low-level
   airmass. Surface wet bulb temperatures should remain below freezing
   across much of this area through 12Z. Freezing rain rates of 0.05
   inch per 3 hours have been observed at several locations across
   IL/IN earlier this evening. Rates of at least this level are
   expected across OH due to the colder low-level airmass in place.
   Across northern KY, surface temperatures are somewhat warmer
   (generally in the mid/upper 30s), but cold ground temperatures
   should still allow for some freezing rain potential. A transition to
   light/moderate snow may occur on the western periphery of the
   precipitation shield as low/mid-level temperatures cool.

   ..Gleason.. 01/08/2018

   ...Please see for graphic product...


   LAT...LON   39708545 40878505 41468440 41728323 41718275 41568227
               41658184 41788139 41718110 41258053 39958103 39388194
               38388279 37938344 37808417 37878518 38178575 39708545 

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