Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 334 AM EST Sun Jan 29 2017 Valid 12Z Sun Jan 29 2017 - 12Z Tue Jan 31 2017 ...Heavy snow possible over parts of the Upper Mississippi Valley/Upper Great Lakes... ...Snow possible downwind of the Great Lakes and into parts of the Northern/Central Appalachians... A weak boundary over the Great Lakes will weaken by Monday. The system will produce lake effect/lake enhanced snow over the Great Lakes into parts of Northern New England that will slowly come to an end ahead of the next system by Monday afternoon into evening. In addition, upper-level energy over Middle Mississippi Valley will move eastward off the Mid-Atlantic Coast followed by a second area of upper-level energy from the Upper Great Lakes. The energy will produce snow over the Ohio/Tennessee Valleys and rain over parts of the Tennessee Valley on Sunday morning. Rain and snow from this system will move into parts of the Mid-Atlantic and Central Appalachians through Monday evening. Meanwhile over Florida, upper-level energy over the Southeast/Eastern Gulf Coast will move off the Florida Coast by Sunday evening. The energy will produce rain over parts of Florida through late Sunday night. Furthermore, a front moving onshore over the West Coast of Canada will weaken while a new front develops over the Upper/Middle Mississippi Valley into the Central Plains/High Plains on Monday afternoon into evening. The dying boundary will move into the Pacific Northwest that will produce rain over parts of the Northwest Sunday afternoon into late Sunday evening. As the energy associated with the western front moves into the Northern Plains/Upper Mississippi Valley on Monday the new front will develop over the region. The system will produce snow over the Northern Plains/Upper Mississippi Valley on Monday morning that will expand into the Upper Great Lakes by Monday evening. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php