Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 408 AM EDT Sun Jun 21 2015 Valid 12Z Sun Jun 21 2015 - 12Z Tue Jun 23 2015 ...There is a slight risk of severe thunderstorms over the Northern Plains into Middle Mississippi Valley... ...There is a slight risk of severe thunderstorms over parts of the Middle Mississippi Valley to the Ohio Valley/Central Appalachians... The remains of Tropical Depression Bill will move northeastward from the Mid-Atlantic Coast to Nova Scotia and become absorbed into low pressure moving off the Northeast Coast by late Sunday night. The system will produce showers and thunderstorms over the Mid-Atlantic/Northeast Sunday morning, moving off the Northeast Coast by late Sunday night, too. In addition, a front extending from the Great Lakes to the Central High Plains/Rockies will move eastward to off the Northeast/Mid-Atlantic Coast by Monday morning. The boundary will aid in producing showers and thunderstorms over the Great Lakes/Ohio Valley moving off the Northeast/Mid-Atlantic Coast by Sunday night. Meanwhile, a developing wave of low pressure over the Central Rockies will move northeastward to the Upper Great Lakes by Monday evening. The storm will produce showers and thunderstorms over parts of the Central High Plains and move into the Northern Plains/Northern High Plains by Sunday evening. The showers and thunderstorms will advance to the Great Lakes and parts of the Ohio Valley by Monday evening. Additionally, upper-level energy over Texas will aid in producing showers and thunderstorms over parts of the central portion of the state on Sunday. Also, scattered showers and thunderstorms will develop over parts of Florida through Monday evening. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php