Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
350 AM EST Thu Dec 05 2013
Valid 12Z Thu Dec 05 2013 - 12Z Sat Dec 07 2013
...Heavy rain possible from parts of the Central Appalachians to parts of
the Lower Mississippi Valley...
...Heavy snow possible from parts of the Ohio Valley to Middle Mississippi
...Temperatures will be 10 to 30 degrees below average over the Plains
into parts of the Mississippi Valley...
A strong front extending from the Great Lakes to the Southern Plains will
move eastward to the Mid-Atlantic to the Central Gulf Coast while moving
off the Northeast Coast and the Western Gulf Coast by Friday evening.
Moisture from the Gulf of Mexico will overrun the boundary producing
showers and thunderstorms along and ahead of the front from the Western
Gulf Coast to the Tennessee/Western Ohio Valleys moving to the Eastern
Gulf Coast/Southern Mid-Atlantic by Friday. Rain will develop north of
the front from parts of the Southern Plains to parts of New England by
Thursday evening. The rain will increase in intensity to light to
moderate rain over the Ohio Valley to parts of the Tennessee/Lower
Mississippi Valleys on Friday morning, moving to Southern New
England/Central Gulf Coast by Friday evening.
Mainly sleet will develop slightly farther north of the front, on Thursday
afternoon, from parts of the Southern Plains into the Lower Mississippi
Valley. The sleet will expand into parts of the Western Ohio Valley and
the Middle Mississippi Valley by Thursday evening, ending over the region
during the morning hours on Friday. In addition, snow will develop over
parts of the Southern Rockies that will expand into parts of the Southern
High Plains by Thursday evening. The snow will continue to expand into
parts of the Ohio Valley by Friday. Rain will also develop over parts of
the Southern High Plains into parts of the Southwest, ending on Thursday
Meanwhile, upper-level energy along the British Columbia Coast will move
southward along the Northwest Coast Thursday afternoon into Friday. The
system will produce snow over parts of the Pacific Northwest into interior
parts of Northern California, with rain over the Northern California
Coastal area on Friday.
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php