Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 232 AM EST Sat Jan 26 2019 Valid 12Z Sat Jan 26 2019 - 12Z Mon Jan 28 2019 ...Heavy rain possible over the Florida Peninsula... ...Heavy snow possible over parts of the Northern Plains/Upper Mississippi Valley into parts of the Upper Great Lakes... ...Temperatures will be 10 to 20 degrees below average over the Upper Mississippi Valley/Upper Great Lakes... A complicated front over the Ohio Valley westward to the Middle Mississippi Valley then northwestward into the Northern Plains will consolidate on Sunday over the Lower Great Lakes, moving eastward to the Northeast Coast by late Sunday night. Cold air and counter-clockwise upper-level flow will aid in producing lake effect snow downwind from the Great Lakes and upslope flow snow over parts of the Central Appalachians through Sunday evening. In addition, snow will develop over parts of the Middle Mississippi Valley on Saturday afternoon that will move into the Ohio Valley/Lower Great Lakes overnight Saturday and into the Northeast on Sunday afternoon into evening. The snow will move off the Northeast Coast overnight Sunday. Meanwhile, low pressure along the front over West-Central Canada will move southeastward to the Wisconsin/Illinois boarder by Monday. Snow will develop over parts of the Northern Plains on Saturday afternoon that will begin to increase by Sunday morning. On Sunday evening, moderate to heavy snow will develop over parts of the Northern Plains/Upper Mississippi Valley that will move into parts of the Upper Great Lakes by Monday. Snow will also develop over parts of the Northern/Central Rockies overnight Sunday into Monday. Additionally, moisture flowing off the Western Gulf of Mexico will aid in developing rain over Western Gulf Coast through Sunday evening. Elsewhere, a front over the Straits of Florida will have a wave of low pressure travel along the boundary. Rain will develop over the southern tip of Florida and expand slightly northward overnight Saturday. The rain will become more heavy on Sunday afternoon and begin to wane overnight Sunday into Monday morning. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php