Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
258 AM EST Mon Dec 09 2019
Valid 12Z Mon Dec 09 2019 - 12Z Wed Dec 11 2019
...Heavy snow for the Upper Great Lakes...
...Rain changing to snow a long the I-95 corridor overnight Tuesday into
...Temperatures will be 10 to 20 degrees above average from parts of the
Ohio Valley/Lower Great Lakes to the Lower Mississippi Valley/Southern
Temperatures will be 10 to 20 degrees below average over parts of the
A front extending from the Upper Great Lakes southwestward to the Southern
High Plains will merge with a front coming out of the Southern Rockies by
Monday evening. The boundary will move eastward off the East Coast and
the Gulf Coast by Wednesday. The system will produce snow over parts of
the Upper Midwest that will end over the Upper Mississippi Valley by
Monday evening and continue through Tuesday morning over the Upper Great
Lakes. Rain will also develop over parts of the Ohio Valley/Great Lakes
into the Tennessee Valley by Monday morning that will expand into the
Northeast by Monday afternoon. Rain will also develop over parts of the
Southern Plains through late Tuesday night. The rain will change over to
snow over parts of the Texas Panhandle overnight Monday that will expand
into parts of Lower Mississippi Valley by Tuesday morning. As the front
begins to move off the Northeast Coast by Tuesday evening, rain will
change over to snow from parts of Northern New England into parts of the
Ohio/Tennessee Valleys. Overnight Tuesday into Wednesday morning the area
of rain changing to snow will move into the I-95 corridor. The rain will
move into the Southeast on Tuesday continuing into Wednesday morning.
Meanwhile, another front over West-Central Canada will move southeastward
into the Northern High Plains on Monday and into the Central Plains by
Tuesday morning and into the Great Lakes by Wednesday. The system will
produce scattered snow over parts of the Northern High Plains on Monday
into Tuesday afternoon and into the Northern Plains by Monday evening.
Overnight Tuesday the scattered snow will develop over the Upper Great
Lakes into Monday.
A third front will move into the Pacific Northwest/Northern California, on
Tuesday, that will dissipate by Tuesday evening. The system will produce
rain over the Pacific Northwest and Northern California Coast on Tuesday.
As the precipitation moves inland, snow will develop at higher elevations
on Tuesday evening. Snow and lower elevation rain will develop over parts
of the Northern Intermountain Region and into parts of the Great Basin by
Wednesday morning as rain moves into Central California.
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php