Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 328 PM EST Wed Nov 23 2016 Valid 00Z Thu Nov 24 2016 - 00Z Sat Nov 26 2016 ...Heavy rain possible over the Northwest Coast... ...Heavy snow possible over the Northern Cascades and the Olympic Mountains... A front extending from the Western Ohio Valley to the Central Gulf Coast will move eastward to the Appalachians and modifies while connecting to another trailing boundary. Snow and rain will develop over parts of the Upper Mississippi Valley to the Great Lakes that will move into the Northeast while extending northwestward into the Upper Great Lakes by Thanksgiving evening. The snow will be confined to Northern New England on Thursday evening into Friday. While rain will continue over the Lower Great Lakes into Friday morning. Rain will also develop along and ahead of the front from the Western Ohio Valley southward to the Lower Mississippi Valley that will become less organized on Thanksgiving morning to an area of rain showers over parts of the Mid-Atlantic to Eastern Ohio Valley and the Central/Southern Appalachians. Overnight Thanksgiving, most of the rain showers will be off the Mid-Atlantic Coast. Meanwhile, a second front extending from the Northern High Plains to the Central Rockies/Great Basin will move eastward to the Middle/Lower Mississippi Valley/Southern Plains by Friday morning. The system will produce mostly snow over the Northern/Central Rockies on Wednesday evening. The snow will decrease in areal coverage while moving out of the Rockies on Thanksgiving afternoon then becoming rain and snow over parts of the Upper Mississippi Valley and Great Lakes Thursday evening into Friday. A third front will move onshore over the Pacific Northwest by Thanksgiving morning inching eastward to the Northern Intermountain by Friday morning. A plume of moisture will accompany the boundary onshore over the Northwest producing rain and higher elevation snow over the Pacific Northwest and Northern California that will continue through Friday morning. Snow will develop over parts of the Northern Rockies by Thursday evening continuing into Friday. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php