Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 402 PM EST Wed Feb 08 2017 Valid 00Z Thu Feb 09 2017 - 00Z Sat Feb 11 2017 ...There is a slight risk of severe thunderstorms over parts of the Southern Appalachians/Tennessee Valley and the Southeast... ...Heavy snow for the Cascades and to a lesser extent the Sierras/Northern Rockies... ...Heavy snow possible across parts of Northern Mid-Atlantic and Southern New England... ...Heavy rain possible over parts of Northern California and the Pacific Northwest... ...Lake effect snow over parts of the Upper Great Lakes... Upper-level energy over the Middle Mississippi Valley will move eastward to the Mid-Atlantic Coast inducing low pressure that will deepen rapidly and move northeastward to Southeastern Canadian Coast by Friday morning. Showers and thunderstorms will develop over parts of the Central/Eastern Gulf Coast into parts of the Tennessee Valley/Southern Appalachians that will move off the Southeast/Southern Mid-Atlantic Coast by Thursday morning. In addition, an area of rain and snow will develop over parts of the Ohio Valley and Northern Tennessee Valley on Wednesday evening moving into the Northeast/Mid-Atlantic by Thursday morning. The snow will rapidly move into New England by Thursday afternoon then begin to wane over Southern New England overnight Thursday. The snow will mostly ending over Northern New England by Friday morning. Additionally, upper-level energy and cold air moving over the Upper Great Lakes will produce lake effect snow over parts of the Upper Great Lakes Wednesday evening into Friday. Also, after the a aforementioned storm moves away from the East Coast, lake effect snow will develop over parts of the Central Appalachians into parts of the Lower Great Lakes Thursday afternoon into Friday. Meanwhile, a plume of moisture from the Pacific will move into parts of the California and the Pacific Northwest Coast producing rain over parts of Central/Northern California and the Northwest with snow at higher elevations over the Pacific Northwest into parts of the Northern Rockies on Wednesday evening. The snow levels will rise on Thursday with areas of rain/freezing rain developing just east of the Cascades through Thursday evening. Overnight Thursday the snow levels will lower over the Cascades to the Northern Rockies into Friday. In the meantime, rain heavy at times will continue over parts of the Pacific Northwest and Northern/Central California and moving into parts of Southern California on Friday. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php