Blizzard, Snow, Freezing Rain Will Paralyze Half Of US Monday (Picture, Map)

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
310 PM EST Sun Feb 15 2015

Valid 00Z Mon Feb 16 2015 - 00Z Wed Feb 18 2015

...Heavy snow for parts of the Middle Mississippi Valley eastward across
the Southern Ohio Valley into parts of the Central Appalachians...

...Freezing rain possible for parts of the Lower Mississippi Valley and
Tennessee Valley...

A wave of low pressure over the Southern Plains will move eastward to the
Central Gulf Coast then northeastward to just off the Mid-Atlantic Coast
by Tuesday morning.  The system will pull moisture off the Gulf of Mexico
that will overrun the associated boundary producing light to moderate rain
over parts of the Southern Plains that will move to the Lower Mississippi
Valley and expand into the Southern Appalachians by Monday evening.  By
Tuesday morning, the light to moderate rain will move off Southern
Mid-Atlantic/Southeast Coast.  In addition, snow will develop over parts
of the Central Plains/Middle Mississippi Valley by Sunday evening that
will become moderate snow over parts of the Lower/Middle Mississippi
Valley by late Sunday night.  The moderate snow will move into the Middle
Mississippi Valley and expand into the Southern Ohio Valley by Monday
morning.  Similarly, the moderate snow will also expand into parts of the
Central Appalachians by Monday evening and move into Southern New England
by Tuesday morning.  Furthermore, a band of rain/freezing rain and sleet
will develop between the rain/snow line from parts of the Middle/Lower
Mississippi Valley spreading into parts of the Southern Appalachians by
Monday evening.  Additionally, showers and thunderstorms will develop over
parts of the Western Gulf Coast and the Lower Mississippi Valley by Monday
afternoon/evening moving out over the Gulf of Mexico by Tuesday. 

Meanwhile, upper-level energy sinking southward over the Rockies will aid
in producing light snow over parts of the Northern/Central Rockies through
Monday evening.  Moreover, a front over West-Central Canada will move
southeastward to the Upper Great Lakes/Central Plains by Tuesday.  The
front will also bank up next to the Northern/Central Rockies on Monday
evening into Tuesday.  The dynamics of the boundary and upslope flow from
high pressure over West-Central Canada will aid in producing light snow
over parts of the Northern/Central High Plains that will move to the
Central High Plains/Central Plains by Tuesday morning.  Light snow will
also develop over parts of the Upper Great Lakes along the associated
front Monday evening into Sunday.  Elsewhere, deep low pressure over the
Canadian Maritime Provinces will move northeastward to Eastern Canada by
Tuesday.  The system will produce light snow along the parts of New
England Coast will wind down overnight Sunday.  Likewise, high wind
associated with the deep low will slowly diminish by Tuesday.  

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