Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 315 PM EST Tue Feb 18 2014 Valid 00Z Wed Feb 19 2014 - 00Z Fri Feb 21 2014 ...Heavy snow for the Cascades... ...Heavy snow for parts of the Upper/Middle Mississippi Valley and parts of the Upper Great Lakes... ...Heavy snow for parts of New England... A front extending from the Upper Great Lakes to the Southern Plains will move eastward off the Atlantic Coast by Thursday morning. The boundary will intersect moisture coming from the Gulf of Mexico over the Tennessee Valley overnight Tuesday producing showers and thunderstorms over the region and move to the Carolinas by Wednesday morning. Rain will develop over parts of the Ohio Valley/Central Appalachians by Wednesday morning that will move eastward to Southern New England by Wednesday evening. The storm will develop a coastal low over the Gulf of Maine by Wednesday evening moving into the Canadian Maritimes by Thursday morning. The system will produce light snow over parts of New England Wednesday evening into early Thursday morning. The storm will also produce moderate to heavy rain along Coastal New England also Wednesday evening, ending by later Wednesday night. Another front will move onshore over the Pacific Northwest and move eastward to the Upper/Middle Mississippi Valley to the Southern Plains by Thursday. The system will produce moderate to heavy rain over parts of the Northwest Coast and heavy snow over the Cascades and parts of the Northern Rockies. The energy loses the moisture connection when the boundary moves out of the Rockies by Wednesday evening. By Thursday morning, the front will intersect moisture flowing northward from the Western Gulf of Mexico producing showers and thunderstorms over parts of the Southern Plains and the Lower/Middle Mississippi Valley into parts of the Central Gulf Coast/Ohio Valley. Snow will develop over parts of the Northern Plains into the Upper/Middle Mississippi Valley. Moderate to heavy rain will also develop over parts of the Ohio Valley/Middle Mississippi Valley on Thursday morning. In addition, a narrow band of rain/freezing rain will develop between the snow and rain over parts of the Upper Great Lakes/Upper Mississippi Valley. Furthermore, snow will develop over parts of the Central Rockies Wednesday evening into Thursday morning. Meanwhile, onshore flow off the Pacific will aid in producing coastal rain and higher elevation snow over parts of the Pacific Northwest through Thursday morning. Snow will also develop over parts of the Northern Rockies through Thursday, too. Elsewhere, low over New England will move northeastward to the Canadian Maritimes by Wednesday morning. The system will produce heavy snow over parts of New England on Tuesday evening, moving into Southeastern Canada by Wednesday morning. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php