Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 352 AM EDT Wed Oct 17 2018 Valid 12Z Wed Oct 17 2018 - 12Z Fri Oct 19 2018 ...Heavy rain possible over parts of the Southern Plains... ...Snow possible over parts of the Central/Southern Rockies... ...Temperatures will be 20 to 30 degrees below average over the Southern Plains... A front extending over parts of the Southeast into the Gulf of Mexico will slowly move southward to the Florida peninsula by Thursday evening. Showers and thunderstorms will develop over parts of the Southern Mid-Atlantic into the Southeast that will move southward over the Florida peninsula by Thursday morning into evening. Rain will develop over parts of the Northern Mid-Atlantic that will move out over the Atlantic by Wednesday evening. In addition, moisture flowing northward out of the Gulf of Mexico will overrun the boundary producing showers and thunderstorms over parts of the Western/Central Gulf Coast that will end over the Central Gulf Coast by Thursday evening. Overnight Wednesday, showers and thunderstorms will move northwestward into parts of the Southern Plains into Thursday evening. Meanwhile, moisture will move northward over the Southern Plains and clockwise circulation around high pressure the Central Plains that will move eastward to the Ohio Valley by Thursday. The moisture and circulation will aid in producing rain over the Southern High Plains through Thursday evening. Additionally, an upper-level low over the Southwest will slowly weaken and move northeastward over parts of the Great Basin/Central Rockies by Thursday. The energy will aid in producing valley rain and mountain snow over parts of the Great Basin/Southwest and the Central/Southern Rockies through Thursday evening. Elsewhere, upper-level energy over the Great Lakes will move eastward off the Northeast Coast by overnight Thursday. The energy will produce rain and snow over parts of the Great Lakes into parts of the Northeast that will end over the Upper Great Lakes by late Wednesday evening and over the Northeast by Thursday evening. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php