Prognostic Meteorological Discussion
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000
FXUS01 KWBC 230826
PMDSPD

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
326 AM EST Fri Feb 23 2018

Valid 12Z Fri Feb 23 2018 - 12Z Sun Feb 25 2018

...Heavy rain possible from parts of the Southern Plains
northeastward to the Eastern Ohio Valley...

...Heavy snow possible over parts of the Upper Mississippi
Valley/Upper Great Lakes...

...Heavy snow possible over the Cascades and Northern Rockies...

...Rain/freezing rain possible over parts of interior New
England...

A storm over the Upper Great Lakes/Upper Mississippi Valley will
move northeastward into Southeastern Canada overnight Friday.  The
system pulls a front extending roughly from the Western Ohio
Valley to the Western Gulf Coast that will move eastward off the
Northeast/Northern Mid-Atlantic Coast then westward to a wave of
low pressure over the Middle Mississippi Valley by Saturday
evening.  Snow will develop over parts of the Northern Plains to
the Upper Mississippi Valley/Upper Great Lakes that will lift
northeastward into Canada by Friday evening.  Showers and
thunderstorms will develop along and ahead of the front from the
Western Gulf Coast/Southern Plains to the Ohio Valley that will
lift northward into parts of the Middle/Lower Mississippi Valley
by Friday evening.  Additional showers and thunderstorms will also
develop over parts of the Central Gulf Coast by Friday evening.
In addition, rain will develop over parts of the Central
Appalachians into the Mid-Atlantic that will move into parts of
the Northeast by Friday evening with snow developing over parts of
Northern Maine.  The rain will move off the Northeast
Coast/Northern Mid-Atlantic Coast by Saturday morning.  A region
of rain/freezing rain will develop over parts of interior New
England Friday into Friday evening.

Meanwhile, a developing wave of low pressure over the Southern
High Plains will move northeastward to the Middle Mississippi
Valley by Saturday evening.  The associated front will move from
the Southern Rockies/Southwest northeastward to the Middle
Mississippi Valley/Western Gulf Coast by Saturday evening.  The
storm will produce snow over parts of the Great Basin/Southwest
and the Central Rockies that will move northeastward into parts of
the Central Plains and Central/Southern Rockies by Saturday
morning.  The snow will continue to move into parts of the
Northern Plain/Upper Mississippi Valley by Saturday evening.
Overnight Friday, showers and thunderstorms will develop along and
ahead of the associated boundary over the Southern Plains that
will move to the Middle/Lower Mississippi Valley by Saturday
evening.

Elsewhere, two areas of upper-level energy will move into the
Pacific Northwest overnight Friday into Saturday morning
continuing into parts of the Northern Intermountain Region/Great
Basin by Saturday evening.  Additionally, onshore flow will
develop over the Pacific Northwest on Friday continuing into
Saturday evening.  The energy and onshore flow will aid in
producing coastal rain and higher elevation snow over parts of the
Pacific Northwest into parts of the Northern Rockies by Friday
evening.  The snow will expand into parts of the Northern/Central
Rockies and Northern California/Great Basin on Saturday into
Saturday evening.  Coastal rain will also move into parts of
Northern California on Saturday into Saturday evening, too.

The short range graphics are not available on the WPC web sight
due to technical problems, but maybe available through other
sources.


Ziegenfelder

Graphics available at
www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php
$$





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