Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 341 PM EST Thu Jan 12 2017 Valid 00Z Fri Jan 13 2017 - 00Z Sun Jan 15 2017 ...Rain/freezing rain possible from parts of the Southern/Central Plains to parts of the Mid-Atlantic/Central Appalachians... ...Snow possible over parts of the Great Basin/Central Rockies... Cold high pressure over the Northern Plains will build eastward into the Great Lakes and over the Northeast by Saturday. A long the leading edge of the cold air, a front will extend from the Northeast to the Southern High Plains. The eastern portion of the boundary will move southward to the Southeast then extend westward to the Southern Plains by Friday evening. Moisture will pool along the leading edge of the temperature contrast that will aid in producing showers and thunderstorms over the Southern Plains/Lower Mississippi Valley that will retreat into the Southern Plains by Friday evening and move into the Southern High Plains overnight Friday into Saturday. In addition, rain will develop from the Ohio/Tennessee Valleys to the Northeast. The rain will move off the Northeast Coast by Friday morning. The rain will also come to an end over the Mid-Atlantic by Friday morning as well. The precipitation will continue in the form of rain from parts of the Lower Mississippi Valley to Southeast/Southern Mid-Atlantic through Saturday morning. Additionally, along the northern edge of the precipitation an area of snow will develop over parts of the Great Lakes/Ohio Valley that will taper off to snow showers downwind from the Great Lakes that will continue through to Friday evening. Overnight Thursday, moisture from the Western Gulf of Mexico will move northward over the Southern Plains that will overrun the front producing rain/freezing rain over the northern edge of the precipitation shield over the Southern Plains into Middle Mississippi Valley by Friday morning. As the moisture continues to move northward over the Plains, the area of rain/freezing rain will extend into the Western Ohio Valley and extend into the Central Appalachians/Mid-Atlantic by Friday morning. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php