Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 337 AM EDT Fri Sep 07 2018 Valid 12Z Fri Sep 07 2018 - 12Z Sun Sep 09 2018 ...Heavy rain possible over parts of the Ohio Valley into the Middle Mississippi Valley... ...Heavy rain possible over parts of the Mid-Atlantic and parts of Southern Plains into parts of the Lower Mississippi Valley... Tropical Depression Gordon is forecast to move northeastward from parts of the Lower Mississippi Valley to the Middle Mississippi Valley by Saturday evening. Gordon will become extratropical by Saturday morning. The system will produce showers and thunderstorms over the Lower Mississippi Valley that will move northeastward to parts of the Ohio, Tennessee, and Middle Mississippi Valleys by Saturday evening. A front extending from the Mid-Atlantic to the Middle Mississippi Valley southwestward into the Southern Plains will be quasi-stationary with the eastern parts of the boundary moving southward into the Southern Mid-Atlantic by Saturday. The western end of the front will slowly move eastward to parts of the Lower Mississippi Valley/Western Gulf Coast also by Saturday evening. Showers and thunderstorms will develop along and near the front from the Mid-Atlantic to the Central/Southern Plains that will continue over the Mid-Atlantic into the Middle Mississippi Valley/Texas as well as Lower Mississippi Valley by Saturday evening into Sunday. In addition, tropical moisture over the Southeast and the Eastern Gulf Coast will aid in producing showers and thunderstorms over the region through Saturday evening. Meanwhile, a front just off the Pacific Northwest Coast will move onshore by Friday evening and move eastward to the Northern High Plains into parts of the Great Basin by Saturday evening into Sunday. Light rain will develop over parts of the Pacific Northwest Coast by Friday evening that will expand eastward into the Northern Intermountain Region by Saturday. The light rain will continue over parts of the Pacific Northwest through Saturday evening into Sunday. Showers and thunderstorms will develop over parts of the Northern High Plains/Northern Rockies on Saturday afternoon moving into parts of the Northern Plains by Saturday evening. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php