Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 252 PM EST Thu Nov 09 2017 Valid 00Z Fri Nov 10 2017 - 00Z Sun Nov 12 2017 ...Below normal temperatures this weekend for much of the Ohio Valley, Northeast and Mid-Atlantic... ...Moderate to heavy snow for parts of the Northern Intermountain Region/Northern Rockies... ...Heavy snow possible over portions of the Upper Great Lakes... ...Heavy rain possible over parts of the Pacific Northwest/Northern California... Arctic air will infiltrate much of the central and eastern CONUS once a cold front passes through the eastern U.S. tonight through Friday. Temperatures this weekend will be well below normal from the Ohio Valley to Maine and south to the Mid-Atlantic. A freeze watch is in effect for most of Virginia and northern North Carolina and a freeze warning is in effect for most of Maryland, Delaware and southern New Jersey. Temperatures will likely severely damage or kill sensitive vegetation like vegetable gardens. Further south... a few showers and thunderstorms will accompany the cold front as it moves from the Tennessee Valley to offshore the Southeast Coast. Snow, heavy at times, will persist across the Upper Great Lakes, especially in the favored downwind locations downwind of Lake Superior and northern Lake Michigan. Winter Weather Advisories and Winter Storm Warnings span from portions of northern Minnesota to the northern Mitt of Michigan... with Gale warnings for Lakes Superior, Michigan and Huron. Northern Maine will have have snow and has Winter Weather Advisories in effect. A low pressure system and surface cold front will track from the Pacific Northwest and Northern/Central California through the Intermountain West/Rockies and into the Plains. Rain and higher elevation snow will develop over the Pacific Northwest while snow/lower elevation rain develops over the Northern Intermountain Region into parts of the Northern Rockies through Friday evening. Additionally, rain will develop over Northern/Central California that will continue through Friday beginning to wane overnight Friday into Saturday. Campbell Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php