SPC MD 1740



MD 1740 CONCERNING WINTER MIXED PRECIPITATION FOR UPSTATE NEW YORK INTO NORTHERN/CENTRAL VERMONT AND NEW HAMPSHIRE

MD 1740 Image


Mesoscale Discussion 1740
NWS Storm Prediction Center Norman OK
0143 AM CST Fri Dec 28 2018

Areas affected...Upstate New York into northern/central Vermont and
New Hampshire

Concerning...Winter mixed precipitation 

Valid 280743Z - 281345Z

SUMMARY...A wintry mix of precipitation, mainly in the form of
lightly accumulating ice and sleet, is expected across the area
through sunrise, before a transition to all rain occurs.

DISCUSSION...An upper-level trough and associated surface cyclone
will impinge on the area throughout the evening, with broad 30+ knot
southwesterly flow in the 925-850 mb layer promoting very strong WAA
into the early morning hours. Current RAP analysis soundings suggest
subfreezing profiles are present across much of the upper Hudson
Valley/New England area, with temperatures below freezing at the
surface as indicated by observations.

Recent KENX and KCXX dual-polarimetric radar data has shown
relatively higher ZDR/lower CC signatures associated with
precipitation currently falling across the area, suggesting a wintry
mix of freezing rain and perhaps sleet is ongoing. As strong WAA
continues across the region, temperatures aloft and at the surface
are expected to encroach the freezing mark, transitioning wintry
mixed precipitation to all rain, from portions of upstate New York
during the early morning hours, to northern portions of New England
after sunrise.

..Squitieri.. 12/28/2018

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

ATTN...WFO...GYX...BTV...ALY...BGM...BUF...

LAT...LON   42817531 43207598 43657619 44067602 44547569 44857524
            45007480 45007319 44917232 44867139 44147141 43597144
            43147176 42927218 42797399 42817531 

Read more



Source link

Editor
  • Editor
  • Website is owned by STL.News, LLC, but hosted, designed and maintained by WebTech Group (WTG). WTG is a St. Louis based web designed firm offering digital marketing services and news sites. We created RSSWX.News to help the major search engines easily find news direct from the source, which is the National Weather Service.