Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 311 AM EST Tue Feb 02 2016 Valid 12Z Tue Feb 02 2016 - 12Z Thu Feb 04 2016 ...There is a slight risk of severe thunderstorms over parts of the Ohio/Tennessee Valleys and parts of the Southeast... ...Heavy snow possible from parts of the Central Plains to the Upper Great Lakes... ...Heavy rain possible over parts of the Lower Mississippi Valley/Southeast and parts of the Ohio/Tennessee Valleys... ...Heavy rain possible over parts of the Olympic Peninsula... A Major storm over the Central Plains will move northeastward into Southeastern Canada by Wednesday evening. Showers and thunderstorms will develop along and ahead of the associated front from the Lower/Middle Mississippi Valley that will move eastward to parts of the Ohio Valley/Lower Great Lakes/Tennessee Valley and parts of the Southeast by Tuesday evening. By Wednesday evening, the showers and thunderstorms will move to the Mid-Atlantic Coast southward to the Southeast/Eastern Gulf Coast. Additionally, snow will develop from parts of the Central/Southern Rockies eastward to the Middle Mississippi Valley that will move into parts of the Upper Mississippi Valley/Great Lakes by Tuesday evening. The snow will wind down over the Central/Southern Rockies by Wednesday morning. Snow will also develop over parts of Northern New England that will slowly change over to rain by Wednesday evening. In addition, the snow over the Central Plains to the Upper Mississippi Valley will end by Wednesday evening, while continuing over the Great Lakes and expanding into parts of the Western Ohio Valley. Furthermore, rain over parts of the Ohio Valley/Lower Great Lakes on Wednesday morning will move eastward to New England by Wednesday evening. Meanwhile, a weakening system will move into the West Coast followed by another system Tuesday into Wednesday. The first system will produce coastal rain and higher elevation snow over parts of the Pacific Northwest into Northern California that will wind down overnight Tuesday. On Wednesday, the second system will move onshore over the West Coast on Wednesday morning producing more coastal rain and higher elevations snow over the Pacific Northwest/Northern California through Wednesday evening. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php