Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 506 PM EDT Fri Sep 01 2017 Valid 00Z Sat Sep 02 2017 - 00Z Mon Sep 04 2017 ...Harvey is now a post-tropical cyclone... ...There is a slight risk of severe thunderstorms over parts of the Carolinas... ...Heavy rain possible over parts of the Southern Mid-Atlantic Coast and parts of the Ohio Valley... ...Temperatures will be 15 to 25 degrees above average over the West Coast... Harvey has transition to a post-tropical cyclone and is forecast to move northward into Southern Quebec by Sunday evening. Showers and thunderstorms will develop along and ahead of the associated front from parts of the Ohio/Tennessee Valleys into the Mid-Atlantic and the Southeast that will likewise lift northward into Northeast/Lower Great Lakes/Northern Mid-Atlantic with showers developing over the Central Appalachians by Sunday. The showers and thunderstorms will move off the Southeast Coast overnight Saturday. In addition, moisture and upper-level energy will aid in producing showers and thunderstorms over parts of Florida Saturday into Sunday. Meanwhile, a front over the Upper Midwest will fracture into two boundaries with the lead front dissipating by Sunday morning over Southern Ontario. A wave of low pressure along the western end of the front will move from the Northern Rockies into roughly the Northern Plains by Sunday. The system will produce showers and thunderstorms over parts of the Upper Mississippi/Middle Missouri Valleys and the Northern/Central Plains into parts of the Southern High Plains that will end over the Plains by Saturday afternoon. On Saturday, the showers and thunderstorms will move out of the Upper Mississippi Valley into the Upper Great Lakes into the Great Lakes by Sunday. Elsewhere, showers and thunderstorms will develop over parts of the Southern California/Southwest overnight Saturday into Sunday. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php