Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 255 AM EST Sat Dec 06 2014 Valid 12Z Sat Dec 06 2014 - 12Z Mon Dec 08 2014 ...Freezing rain may develop over parts of the Upper Mississippi Valley... A front extending from New England southwestward to the Lower Mississippi Valley/Western Gulf Coast will move eastward off the East Coast by Sunday morning. Moisture pooling along the front will aid in producing light to moderate rain over parts of Northeast to the Ohio Valley that will move off the East Coast by late Saturday night. Showers and thunderstorms will develop over parts of the Tennessee Valley/Central Gulf Coast that will move off the Southeast Coast by Saturday night. Patches of rain/freezing rain and snow will develop over parts of Northern New England Saturday morning. Return flow off the Western Gulf of Mexico will produce light rain over parts of Southern Texas on Sunday. Meanwhile, energy off the Northwest Coast will move inland to the Northern Plains by Sunday evening. In addition, the energy will induce a front over the Northern High Plains that will move into the Upper Mississippi Valley/Northern Plains by Sunday evening, too. The energy will develop areas of rain from parts of the Northwest to the Southwest that will wane by late Saturday night. Areas of snow will develop over parts of the Northern Intermountain Region to parts of the Central/Southern Rockies from Saturday afternoon ending by Sunday afternoon. As the developing storm moves onto the Northern Plains, areas of rain/freezing rain will develop over parts of the Upper Mississippi Valley on Sunday. By Sunday evening, snow will also develop over parts of the Upper Mississippi Valley and parts of the Northern Plains. Furthermore, additional upper-level energy will approach the West Coast, accompanied by a plume of moisture that will aid in producing light to moderate rain over parts of Northern California/Pacific Northwest on Sunday evening. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php