SPC MD 1644



MD 1644 CONCERNING HEAVY SNOW FOR NORTHEASTERN VERMONT INTO WESTERN MAINE

MD 1644 Image

Mesoscale Discussion 1644
NWS Storm Prediction Center Norman OK
0706 AM CST Tue Nov 13 2018

Areas affected...northeastern Vermont into western Maine

Concerning...Heavy snow 

Valid 131306Z - 131700Z

SUMMARY...Snowfall rates will increase this morning to between 1-2
inches per hour across portions of northeastern Vermont into western
Maine.

DISCUSSION...Precipitation is ongoing across much of the Northeast
within a broad warm-air advection regime to the north of a
developing Mid-Atlantic cyclone and to the east of a midlevel
trough. Within this warm-air advection regime, strong frontogenetic
forcing in the lower troposphere is focused across southern New
England. This will lift northward later this morning as the surface
low moves northeast along the coast. Temperatures across northern
Vermont and into Maine should remain cold enough to support snow as
the predominant precipitation type through the day. Thus, as the
higher precipitation rates associated with the lower-tropospheric
frontogenetic forcing arrive, the result will be several hours of
1-2 inch per hour snowfall rates, with higher rates possible on
small space/time scales. Snowfall rates should begin to decrease
this afternoon as the low begins to move away from the area.

..Marsh.. 11/13/2018

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

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

LAT...LON   44167137 44307249 44917281 45787059 46936970 46196842
            44836992 44167137 

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