Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 327 PM EST Sat Nov 30 2019 Valid 00Z Sun Dec 01 2019 - 00Z Tue Dec 03 2019 ...Heavy snow for the Upper Mississippi Valley/Upper Great Lakes and the Northeast with rain/freezing rain over parts of the Great Lakes into Northeast... ...Heavy snow for the Sierra Nevada... ....There is a slight risk of severe thunderstorms over parts of the Lower Mississippi Valley/Tennessee Valley... A storm over the Middle Missouri Valley will move eastward to off the Northeast Coast by Monday evening. The system will produce heavy snow over parts of the Upper Mississippi Valley/Upper Great Lakes on Saturday evening into Sunday evening. In addition, rain/freezing rain and sleet will develop over parts of the Northern Lower Peninsula of Michigan overnight Saturday into Sunday morning. As the storm moves eastward, rain/freezing rain will develop over parts of the Northern Mid-Atlantic, late on Saturday night, that will move into parts of Southern New England on Sunday evening into Monday. On Sunday afternoon into Monday evening, heavy snow will develop over parts of the Northeast. Difficult to dangerous driving conditions will be associated with the winter weather over the Upper Midwest into the Northeast. Additionally, the storm will produce showers and thunderstorms over parts of the Tennessee and Lower/Middle Mississippi Valleys overnight Saturday into Sunday morning with some becoming severe. The showers and thunderstorm will move into parts of the Southeast and Southern Mid-Atlantic on Sunday moving off the Southeast/Southern Mid-Atlantic Coast by Sunday night. Rain will also develop over parts of the Middle Mississippi Valley into parts of the Great Lakes/Ohio Valley overnight Saturday into Sunday morning. The rain will turn over to snow overnight Sunday. Rain will develop over parts of the Mid-Atlantic on Sunday, ending overnight Sunday for the Southern Mid-Atlantic. The rain will continue over parts of the Northern Mid-Atlantic and changing over to snow with some rain near the coast on Sunday evening into Monday. Furthermore, along with the original low pressure system, another surface low will develop on Sunday in the Mid-Atlantic and move as a nor'easter Sunday night and into Monday along the Northern Mid-Atlantic Coast and Southern New England Coast. Travel impacts can be expected With this storm on this busy travel weekend. Upper-level energy over the Eastern Pacific and associated plume of moisture entering California overnight Saturday and persisting through Monday. Heavy rain and heavy higher elevation snow will develop over parts of California on Saturday evening and expand into parts of the Pacific Northwest overnight Saturday. Some flooding is possible in parts of Northern California, especially for areas with burn scars. Meanwhile, the Sierra Nevada could see snow measured in feet. Lighter snow should spread into the Intermountain West Sunday. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php