...Heavy rain for parts of the Tennessee Valley...
...Temperatures will be 10 to 25 degrees below average over the
Northern/Central High Plains...
A quasi-stationary front extending from the Great Lakes to the Southern High Plains will slowly begin to move eastward to just off the Northeast Coast across the Mid-Atlantic into the Central Gulf Coast by Sunday evening.
Moisture pooling along the front will trigger snow over the Middle Missouri Valley to the Great Lakes that will move eastward into Northern Maine by Sunday morning before ending.
Likewise, rain will develop along the front from the Western Ohio Valley to Eastern Texas that will remain along the boundary through Saturday evening.
As the front begins to move eastward, the rain will advance eastward to the Lower Mississippi Valley to the Mid-Atlantic by Sunday evening.
In addition, the rain will become moderate to heavy over the Tennessee Valley on Sunday evening, while showers and thunderstorms develop over parts of the Lower Mississippi Valley/Central Gulf Coast.
Furthermore, pockets of rain/freezing rain will develop along the rain/snow line over Middle Mississippi Valley/Ohio Valley on Saturday morning and over parts of Texas to Northern Arkansas on Sunday morning.
Meanwhile, a weak front along the Southeast Coast will move northward out over the Western Atlantic by early Sunday morning.
Rain with embedded thunderstorms will develop along the Southeast Coast moving to parts of the Southern Mid-Atlantic by late Saturday night.
Energy over the Rockies/Southwest will move into Western Texas by Sunday.
The energy will produce scattered areas of light snow over parts of the
Rockies on Saturday.
Additionally, a system approaching California will begin to produce coastal rain and higher elevation snow over parts of Northern/Central California on Sunday.
The return of onshore flow over the Pacific Northwest will aid in producing coastal rain and higher elevation snow over part of the Pacific Northwest and snow over parts of the Northern Rockies on Sunday.