Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
413 AM EDT Fri Apr 20 2018
Valid 12Z Fri Apr 20 2018 - 12Z Sun Apr 22 2018
...Heavy rain possible over parts of the Lower Mississippi Valley into
parts of the Southern Plains...
...Heavy snow possible over parts of the Central Rockies...
A storm over the Central/Southern Rockies will slowly move to the Southern
High Plains by Saturday evening. The system will produce lower elevation
rain and snow over parts of the Central Rockies/Great Basin that will
slowly taper off by Saturday evening. Showers and thunderstorms will
develop over parts of the Southern High Plains that will move eastward to
the Southern Plains by Saturday morning moving into the Lower Mississippi
Valley by Sunday morning. Rain will begin to develop over parts of the
Central High Plains on Friday morning that will expand into parts of the
Middle Mississippi Valley by Saturday morning into Sunday.
Meanwhile, a front over the Eastern Pacific will move onshore over the
Pacific Northwest early on Saturday morning moving inland to the Northern
High Plains/Northern Intermountain Region by Saturday evening. Overnight
Friday, rain and higher elevation snow will develop over parts of the
Pacific Northwest moving into parts of the Northern Intermountain Region
by Saturday morning. The rain will change over to snow over parts of the
Northern Rockies by Saturday evening. The rain and snow will taper off
over the Pacific Northwest into the Northern Rockies overnight Saturday.
Elsewhere, an upper-level low over the Northeast and Southeastern Canada
will aid in producing light snow over Northern New England through
Saturday morning when the upper-level low moves to the eastern tip of
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php