Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 357 AM EDT Sun Oct 14 2018 Valid 12Z Sun Oct 14 2018 - 12Z Tue Oct 16 2018 ...There is a slight risk of severe thunderstorms over parts of the Southern Plains... ...Heavy snow possible over parts of the Central/Southern Rockies and parts of the Central High Plains... ...Heavy rain possible over parts of the Southern Plains into the Lower Mississippi Valley... ...Temperatures will be 20 to 35 degrees below average over parts of the Rockies, Plains, and Middle Mississippi Valley... A front extending from the Upper Great Lakes to the Southern Plains westward into the Great Basin will move eastward to the Northeast/Central Appalachians southwestward to the Western Gulf Coast by Monday evening. Showers and thunderstorms will develop along and ahead of the boundary from parts of the Lower Mississippi Valley into Southern Plains/Western Gulf Coast that will expand northeastward into parts of the Tennessee and Ohio Valleys by Monday morning. By Monday evening, the showers and thunderstorms will extend from parts of the Mid-Atlantic southwestward to Western Gulf Coast. Rain will also develop over parts of the Middle Mississippi Valley into parts of the Ohio/Tennessee Valleys, on Sunday morning, expanding into parts of the Mid-Atlantic by Sunday afternoon only to wane back the Ohio Valley by Sunday evening. In addition, upper-level energy over the Great Basin will move southward into the Great Basin/Southwest by Monday into Tuesday. While another area of upper-level energy associated with the aforementioned front will move from the Central Plains to the Northeast by Monday evening. The upper-level energy will aid in producing snow over parts of the Northern/Central Rockies into parts of the Central Plains that will end over the Central Plains overnight Sunday and parts of the Southern Rockies by Monday afternoon. Rain will also develop over parts of the Central Plains into parts of the Upper Mississippi Valley that will move eastward into parts of the Middle Mississippi Valley into the Upper Great Lakes by Sunday evening. The rain will move into the Lower Great Lakes/Ohio Valley by Monday morning and from the Northeast to parts of the Southern Plains by Monday evening. Additionally, an upper-level low over parts of the Upper Mississippi Valley will move eastward into Canada by Monday evening. The energy will aid in producing snow over parts of the Northern Plains by Sunday afternoon moving into parts of the Upper Great Lakes/Upper Mississippi Valley on Monday morning, moving into Canada overnight Monday. Elsewhere, upper-level energy over Arizona/Mexican border will move into the Southern Plains and weaken by Monday morning. The energy will also aid in producing rain over parts of the Southwest/Southern Rockies, on Sunday, that move into the Southern Rockies/Southwestern Texas on Monday. Snow will develop over parts of the Southern Rockies overnight Sunday into Monday evening. An area of rain/freezing rain will develop over parts of Southwestern Texas Monday into Tuesday. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php