Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 311 AM EDT Mon Apr 08 2019 Valid 12Z Mon Apr 08 2019 - 12Z Wed Apr 10 2019 ...There is a slight risk of severe thunderstorms over parts of the Southern Mid-Atlantic and the Southeast... ...Heavy snow possible over parts of Northern New England... ...Heavy rain possible over parts of the Pacific Northwest and the Tennessee Valley... ...Developing winter storm over the West... Low pressure over the Lower Great Lakes will move eastward to New England by Monday evening followed by a second low over the Upper Midwest that will move to New England by Tuesday evening. The system will develop snow over parts of Northern New England on Monday as rain develops over parts of the Northeast and Southern New England also on Monday. The rain will end overnight Monday over the Northeast as snow will continue over parts of Northern New England. On Tuesday the second system moves out of the Great Lakes into the Northeast and move off the Northeast Coast by Wednesday morning. The storm will produce more snow over Northern New England through Wednesday. Rain will also develop over parts of the Northeast on Tuesday with rain ending over Southern New England overnight Tuesday. Meanwhile, low pressure over the Central Gulf Coast will slowly move eastward off the Southeast Coast overnight Tuesday. The system will produce showers and thunderstorms over parts of the Lower Mississippi and the Tennessee Valleys along with parts of the Southern Ohio Valley on Monday. The showers and thunderstorms will move into parts of the Southeast/Southern Mid-Atlantic on Monday evening. The showers and thunderstorms will move off the Southeast Coast overnight Tuesday. A plume of moisture over the West Coast will aid in producing rain over parts of the Pacific Northwest into parts of Northern California and the Northern Intermountain Region that will continue through Tuesday morning. Overnight Monday, the plume of moisture will move off the West Coast. Upper-level energy over the Pacific will move onshore over the overnight Monday developing a strong storm over the Rockies overnight Tuesday. As the upper-level trough moves onshore, the snow levels will start to lower over the Cascades and parts of the Northern Rockies. As the storm develops, snow will develop over parts of the Great Basin and Northern Rockies by Tuesday evening. By Wednesday morning, snow will start to develop over part of the Northern Plains and rain over parts of the Central Plains as snow develops over the Northern/Central Rockies. In the meantime, rain and snow will develop over parts of the Upper Great Lakes overnight Monday ending by Tuesday evening. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php