Prognostic Meteorological Discussion
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FXUS01 KWBC 231954

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
353 PM EDT Fri Mar 23 2018

Valid 00Z Sat Mar 24 2018 - 00Z Mon Mar 26 2018

...Active weather continues for the West Coast...

...Heavy snow possible for portions of the northern Plains and
Mississippi Valley...

A swath of snow is expected to accumulate from the northern Plains
to the central Appalachians over the next few days.  As an upper
level disturbance moves from the Rockies along with moisture on
tap, a band of snow will continue to fall across the Dakotas and
eastward into the Upper Midwest through this evening. The
disturbance will slide eastward into the Mississippi
Valley--resulting in the precipitation  also shifting east and
south. The axis of heavy snowfall is occur mostly in northeastern
Iowa tonight through Saturday morning. By Saturday afternoon, most
of the precipitation will shift to the Ohio, Tennessee Valley in
addition to parts of the Southeast and into the central
Appalachians.  Most of the precipitation will be in the form of
rainfall; however, snow is expected for a small portion of the
Ohio Valley and the central Appalachians.  By Sunday, showers will
continue across the Southeast.

A deep upper level low off the Pacific Northwest will give way to
active weather over the next few days. The upper level low will
stay offshore through Saturday night and will begin to move inland
over the Central Great Basin by Sunday morning. Through tonight,
moderate rainfall is expected along the Pacific Northwest and
northern California--with heavy snow in the higher elevations of
the Oregon Cascades, the Siskiyous and Shasta ranges of northern
California, and the Sierra Nevada. Another wave of lighter
precipitation is expected across these regions again on Saturday.
The higher elevations will also receive additional snowfall but
accumulation amounts will not be  as much as what will occur on
Friday. Furthermore, the Intermountain West and Great Basin will
also experience light rainfall along with higher elevation snow
over the weekend.


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