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Mesoscale Discussion 8
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   Mesoscale Discussion 0008
   NWS Storm Prediction Center Norman OK
   0350 PM CST Thu Jan 04 2018

   Areas affected...Down East ME

   Concerning...Winter mixed precipitation 

   Valid 042150Z - 050245Z

   SUMMARY...Heavy snow switching to freezing rain/sleet is possible
   this evening with any on-shoring bands of precipitation.

   DISCUSSION...The latest composite reflectivity mosaic shows new
   bands of precipitation forming and moving northward toward the Down
   East region of ME. As these bands move onshore there is uncertainty
   in the dominant precipitation type that will occur.  Surface
   temperatures along/near the coast remain below freezing, and the
   latest model guidance suggests this trend will continue. Meanwhile,
   low-level warm air advection should also occur with the
   approaching/deepening surface low, with the potential for 850-700mb
   temperatures rising above freezing for a few hours this evening.
   Should the conditions come to fruition, then a period of freezing
   rain (with accumulations potentially exceeding 0.05") and sleet may
   occur.

   ..Karstens.. 01/04/2018

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

   ATTN...WFO...CAR...GYX...

   LAT...LON   44266792 44126842 44256906 44696919 45056877 45356769
               45396725 45026669 44716678 44396744 44266792 

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Page last modified: January 05, 2018
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