Short Range Forecast Discussion...Corrected NWS Weather Prediction Center College Park MD 717 AM EDT Sat Aug 13 2016 Valid 12Z Sat Aug 13 2016 - 12Z Mon Aug 15 2016 ...Heavy rain possible over parts of the Ohio Valley into the Middle Mississippi Valley... ...Heavy rain possible over parts of the Lower Mississippi Valley... A low- to mid-level cyclone over the Lower Mississippi Valley will slowly begin to lift northward into the Middle Mississippi Valley by Sunday evening into Monday. Tropical moisture over the Gulf Coast Region will aid in producing showers and thunderstorms over the Lower Mississippi Valley with heavy rain at times through Monday. Meanwhile, a quasi-stationary front extending from New England westward to the Great Lakes then southward to the Southern Plains will have tropical moisture pooling along the boundary through Monday. Showers and thunderstorms will develop along and near the boundary through Monday with some areas getting heavy rain. Additionally, tropical moisture and daytime heating over the Southeast will produce showers and thunderstorms over the area during the afternoon into the late evening hours on Saturday into Monday. In addition, upper-level energy over Upper Mississippi Valley will move eastward into Canada by late Saturday night. The energy will trigger showers and thunderstorms over parts of the Upper Mississippi Valley/Upper Great Lakes that will likewise move into Canada overnight Saturday. Elsewhere, monsoonal moisture and daytime heating will produce showers and thunderstorms over parts of the Southern/Central Rockies during the afternoon into the late evening on Saturday and Sunday. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php