Mesoscale Discussion 0108
   NWS Storm Prediction Center Norman OK
   0946 AM CST Fri Feb 07 2020

   Areas affected...Portions of central New Hampshire into southern
   Maine

   Concerning...Freezing rain 

   Valid 071546Z - 071945Z

   SUMMARY...Freezing rain and sleet are ongoing across parts of
   southern New Hampshire/Maine. An increase in freezing rain rates is
   possible for a few hours, into early afternoon, with a couple spots
   potentially seeing up to .05 inch/hr rates.

   DISCUSSION...The northeast progression of an intensifying surface
   low and associated precipitation bands (now over portions of
   southern New England) will result in a subsequent increase in
   precipitation rates across portions of central New Hampshire into
   central and southern Maine over the next few hours. Latest METAR
   observations and KGYX dual-polarimetric data suggest that a wintry
   mix is currently present across portions of central into northern
   New England, with 850-700 mb WAA (depicted by both the latest
   mesoanalysis and RAP forecast soundings) promoting above-freezing
   temperatures within this layer. 

   Continued WAA will keep temperatures above freezing aloft, with a
   more gradual warming trend expected at the surface. Given that the
   surface has been below freezing for several hours, and given that
   surface temperatures will likely remain below freezing into early
   afternoon, liquid precipitation, falling through the surface-700 mb
   layer will likely efficiently freeze upon contact. Latest
   high-resolution model guidance suggests that heavier freezing rain
   is likely into the early afternoon, with up to .05 inch/hr rates
   possible. However, given the relatively rapid northeast track of the
   surface low, and gradual northward movement of the surface freezing
   line, the period of heaviest freezing rain will likely be contained
   within a relatively narrow time frame, which appears to be 17-21Z.

   ..Squitieri.. 02/07/2020

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

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

   LAT...LON   43387194 43917199 44367170 44717093 44857003 44656944
               44196965 43637059 43307118 43387194