MD 1795 CONCERNING HEAVY SNOW FOR CENTRAL NY
Mesoscale Discussion 1795 NWS Storm Prediction Center Norman OK 0930 PM CST Mon Dec 11 2017 Areas affected...Central NY Concerning...Heavy snow Valid 120330Z - 120930Z SUMMARY...Snowfall rates will increase gradually through 06-09z, with peak rates likely to exceed 1 inch per hour from about 07-12z. DISCUSSION...In association with a midlevel shortwave trough approaching the upper OH Valley, a deformation snow band has been developing eastward over Lake Erie. Low-midlevel warm advection/ascent in advance of the trough, as well as weak frontogenesis, will support additional eastward expansion of the snow band across central NY through the early morning hours. Top-down saturation of the column is just beginning across western into central NY, and snowfall rates will increase as column saturation develops eastward and forcing for ascent increases through the early morning hours. Peak snowfall rates should approach or exceed 1 inch per hour, and may persist for 3-6 hours at locations within the expected corridor of the snow band. ..Thompson.. 12/12/2017 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...BTV...ALY...BGM...BUF... LAT...LON 43217361 43007412 42747497 42497608 42457687 42517744 42667771 43037760 43837544 44037419 43947361 43617347 43217361
from SPC Mesoscale Discussions http://bit.ly/2AaUjpR
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