Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 413 PM EDT Sat Aug 05 2017 Valid 00Z Sun Aug 06 2017 - 00Z Tue Aug 08 2017 ...There is a slight risk of severe thunderstorms over parts of the Central Plains... ...Heavy rain possible over parts of the Middle Mississippi Valley into the Southern Plains... A front over Northern New England and extending southwestward into the Southern Mid-Atlantic will move off the Northeast Coast by Sunday morning. The system will produce showers and thunderstorms over parts of the Northeast through late Sunday morning. Showers and thunderstorms will linger over parts of the Southern Mid-Atlantic Through Monday morning. Meanwhile, a wave of low pressure over the Central Plains will advance eastward to the Ohio Valley by Monday. Showers and thunderstorms will develop over parts of the Central/Southern Plains into parts of the Middle Mississippi Valley on Saturday evening, expanding into parts of the Ohio Valley by Sunday afternoon. Showers and thunderstorms will develop along and ahead of the boundary from the Ohio Valley to the Lower Mississippi Valley/Southern Plains from Sunday evening into Monday. Furthermore, showers and thunderstorm will develop along and ahead of the warm front that will lift northward into the Ohio Valley/Mid-Atlantic overnight Sunday. In addition, upper-level energy over the Northern High Plains will slowly move eastward to the Middle Mississippi Valley/Northern Plains. The energy will aid in producing showers and thunderstorms over parts of the Northern Plains into the Northern Rockies and eastward into the Upper Great Lakes on Saturday evening that will wane to an area of showers and thunderstorms over parts of the Northern/Central Plains by Sunday morning. The area of showers and thunderstorms will expand again over the Upper Mississippi Valley into the Great Lakes waning to an area over the Middle Mississippi Valley/Central Plains by Monday morning. In the meantime, moisture rich air over the Gulf Coast into the Southeast will produce shower and thunderstorms from the Western Gulf Coast to the Eastern Gulf Coast and the Southeast through Monday. The showers and thunderstorms will have the greatest areal coverage during the late afternoon into the late evening on Saturday and Sunday. Additionally, upper-level energy just off the Northern California Coast will move inland to parts of the Great Basin by Monday. The energy will aid in producing showers and thunderstorms over parts of Northern California to the Great Basin and the Central/Southern Rockies through Monday. Likewise, the showers and thunderstorms will have the greatest areal coverage during the late afternoon into the late evening on Saturday and Sunday. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php