Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
224 PM EST Fri Dec 14 2018

Valid Sat Dec 15 2018 - Mon Dec 17 2018

...Excessive rainfall possible over parts of Southeast into the

...There is a slight risk of severe thunderstorms over parts of
northeastern Florida... 

...Moderate to heavy snow for the Northern Cascades...

...Heavy rain possible over parts of the Ohio Valley into the Mid-Atlantic
and parts of Northern California...

A storm over the Lower Mississippi Valley will move northeastward to the
Mid-Atlantic by Sunday.  The system will produce showers and thunderstorms
along and near the associated front from parts of the Tennessee Valley
into parts of the Southeast that will move off the Southeast Coast by
Saturday afternoon.  Rain will develop over parts of the Lower/Middle
Mississippi Valley eastward into Mid-Atlantic/Southeast that will end over
the Lower/Middle Mississippi Valley by Saturday evening.  The rain will
slowly end over the Southeast by overnight Saturday, while the rain will
continue over parts of the Eastern Ohio Valley/Northern Mid-Atlantic
through Sunday.  In addition, upper-level energy over Southeastern Canada
will move eastward over Northern New England and out over the Western
Atlantic by Saturday night.  The energy will aid in producing rain and
snow over parts of the Lower Great Lakes into Northern New England ending
by Saturday morning.

Meanwhile, a front over the West Coast will move eastward to the Upper
Great Lakes/Middle Mississippi Valley into parts of the Central
Plains/Northern High Plains by Sunday.  The system will produce rain and
higher elevation snow over parts of the Pacific Northwest into
Northern/Central California that will move into the Northern Rockies and
wane on Saturday morning.  Moisture ahead of the next front will aid in
producing rain along the Northwest Coast into the Northern/Central
California Coast by early Sunday morning.  As the moisture moves inland,
the rain expands eastward into the Northwest and snow will develop at
higher elevations by Sunday morning. 


Graphics available at
Storm Prediction Center United States 2 Day Forecast