Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
340 AM EDT Sat Apr 21 2018

Valid Sat Apr 21 2018 - Mon Apr 23 2018

...Heavy rain possible over parts of the Southeast, Tennessee Valley,
Lower Mississippi Valley, and Southern Plains...

...Heavy snow possible over parts of the Northern Rockies...

...Temperatures will be 10 to 20 degrees below average over parts of the
Central/Southern Plains...

A storm over the Southern High Plains will move eastward to parts of the
Lower Mississippi/Tennessee Valleys by Sunday evening.  The system will
produce snow over parts of the Central Rockies that will end by Saturday
evening.  In addition, showers and thunderstorms will develop over parts
of the Southern Plains that will move eastward into the Lower Mississippi
Valley and the Central Gulf Coast by Sunday morning.  By Sunday evening,
the showers and thunderstorms will move into parts of the
Southeast/Eastern Gulf Coast.  Rain will also develop over parts of the
Central Rockies and Central/Southern Plains that will move into parts of
the Middle Mississippi and Tennessee Valleys by Sunday morning.  The rain
will also move into parts of the Ohio Valley and the Southeast by Sunday
evening.  Furthermore, southeasterly flow off the Atlantic will aid in
producing showers and thunderstorms over Florida through Sunday evening
into Monday. 

Meanwhile, a front over parts of the Pacific Northwest/Northern
Intermountain Region will move eastward to the Northern Plains into the
Northern Rockies by Sunday evening.  The system will produce rain and
higher elevation snow over parts of the Pacific Northwest into parts of
the Northern Intermountain Region that will taper off by Saturday evening.
 Upper-level energy over the Eastern Pacific will move onshore over the
Pacific Northwest on Sunday morning continuing to the Northern
Intermountain Region by Sunday evening.  The energy will aid in producing
scattered rain over parts of the Northern Intermountain Region on Sunday
evening. 


Ziegenfelder


Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php
Storm Prediction Center