Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
259 PM EST Mon Nov 20 2017
Valid 00Z Tue Nov 21 2017 - 00Z Thu Nov 23 2017
...Heavy rain possible for the Pacific Northwest...
...Light lake effect snow downwind of the Great Lakes...
...Light snow over parts of Northern New England...
A front extending from the Upper Mississippi Valley/Northern Plains
northwestward into the Northern High Plains will move south and eastward
to off the Eastern Seaboard and off the Gulf Coast States by Wednesday.
Light snow will develop over parts of the Upper Great Lakes overnight
Monday that will become rain and snow over the Lower Great Lakes/Ohio
Valley by Tuesday evening. The rain and light snow will move to the
Northeast overnight Tuesday into Wednesday.
Meanwhile, upper-level energy over the Pacific Northwest will move
southeastward to the Western Gulf Coast while weakening. The energy will
aid in developing rain and higher elevation snow over parts of Pacific
Northwest into the Northern Rockies that will move southeastward to the
Central Rockies/Central Plains and dissipate by Tuesday evening. In
addition, another area of upper-level energy over the Western Gulf Coast
will move eastward to the Southeast by Tuesday evening then move
northeastward out over the Western Atlantic by Wednesday aiding in the
development of an area of low pressure off the North Carolina Coast
overnight Tuesday into Wednesday. Showers and thunderstorms will develop
over parts of the Southeast/Florida on Tuesday into Tuesday afternoon.
More to Follow
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php