Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
254 PM EST Sat Dec 15 2018
Valid 00Z Sun Dec 16 2018 - 00Z Tue Dec 18 2018
...Heavy rain possible for the Olympic peninsula and Central California...
...Snow for the Cascades, Northern Intermountain Region, and Sierras...
...Snow for parts of the Northeast and rain/freezing rain...
A storm over the Tennessee Valley will move roughly northeastward to off
the New England Coast by Monday. The system will produce rain from parts
of the Tennessee Valley/Ohio Valley eastward to the Mid-Atlantic/Southeast
that will move off the Southeast Coast overnight Saturday. The rain will
lift into parts of the Northeast with pockets of rain/freezing rain
starting overnight Saturday, too, and the rain/Freezing rain ending by
Sunday evening. Snow will develop over parts of the Northern Appalachians
on Sunday afternoon that will move into parts of Northern New England by
Monday morning. Most of the rain will end overnight Sunday over the
Mid-Atlantic while continuing over parts of Southern New England into
Meanwhile, moisture ahead of the next Pacific front will aid in developing
rain over parts of the Northern California Coast and the Pacific Northwest
Coast that will slowly move inland overnight Saturday with snow developing
over parts of Cascades by Sunday morning. Overnight Sunday, snow will
move into parts of the Northern Intermountain Region. Also overnight
Sunday, rain will move into Central California with snow developing over
the highest elevations of the Sierras, continuing into Monday.
Additionally, upper-level energy over Northwestern Mexico will move
northeastward into the Southern Rockies by Monday. The energy will aid in
developing rain over parts of Western Texas late Sunday night into Monday.
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php