Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 235 PM EST Fri Feb 28 2020 Valid 00Z Sat Feb 29 2020 - 00Z Mon Mar 02 2020 ...Heavy lake-effect snow event downwind from Lake Erie and Lake Ontario through Saturday evening... ...Temperatures will be 10 to 15 degrees below average from the Great Lakes to the East Coast, warming temperatures in the Plains and Midwest throughout the weekend... ...Pacific storm to usher in coastal showers and mountain snow over the western third of the continental U.S. Saturday and Sunday... The lake-effect snow will wind down over the Upper Great Lakes by Saturday afternoon as upper-level ridging begins to build over the Upper Great Lakes. As the upper-level ridge moves eastward the lake-effect snow will wind down overnight Saturday. Cold air flowing over the ice-free Great Lakes and prolonged bands of lake-effect snow will continue downwind from all the Great Lakes and into the Central Appalachians through Saturday morning. In addition to the heavy snow, Blizzard Warnings are also in effect downwind of Lake Ontario until Friday evening due to wind gusts up to 50 mph and potential whiteout conditions. The East Coast will bundle up through Sunday morning as below normal temperatures stick around through Saturday evening. Sub-freezing low temperatures are likely through much of the Southeast both Saturday and Sunday mornings. Meanwhile, the Nation's Heartland will see more spring-like temperatures with day time highs in the 60s and 70s this weekend. The West Coast will enjoy unseasonably warm temperatures Friday but cooler temperatures are on the way on Saturday. The West Coast cools off this weekend due to a cold front and its parent Pacific storm tracking into the Pacific Northwest on Saturday. Valleys and coastal locations can anticipate passing rain showers as early as Friday night and lasting into Saturday. The higher elevations of the Northwest will contend with periods of snow with the heaviest snowfall located in the Cascades. By Sunday, areas of mountain snow will extend south into the Sierra Nevada and the Central Rockies. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php