Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 358 PM EDT Tue May 09 2017 Valid 00Z Wed May 10 2017 - 00Z Fri May 12 2017 ...there is a slight risk of severe thunderstorms over the Central/Southern High Plains... ...Heavy rain possible over parts of the Central High Plains eastward into parts of the Middle Mississippi Valley... An east-west front has setup from the Southern Mid-Atlantic westward to the Central High Plains that will be quasi-stationary through Thursday. Moisture from the Western Gulf of Mexico will stream northward and overrun the boundary over the Plains into parts of the Middle Mississippi Valley then pooling along the front eastward to the Mid-Atlantic. Showers and thunderstorms will develop along the boundary near a wave of low pressure over the Ohio Valley that will extend southeastward into the Southern Mid-Atlantic. The showers and thunderstorms will continue over the area through early Wednesday morning tapering off from west to east. In the meantime, showers and thunderstorms will develop over the Southern/Central High Plains and into parts of the Central/Southern Rockies along with parts of the Southwest/Eastern Great Basin. Overnight Tuesday as the moisture surges over the boundary, showers and thunderstorms will develop over the Central Plains/Middle Mississippi Valley and begin to expand eastward into the Western Ohio Valley by Wednesday morning. The showers and thunderstorms will continue over the region and expand eastward into the Ohio Valley and into parts of the Southern Mid-Atlantic again by Wednesday evening. The showers and thunderstorms will continue from the Central High Plains eastward to the Southern Mid-Atlantic through Thursday. Furthermore as the upper-level low slowly weakens and travels eastward to the Central/Southern Plains, the associate cold front also moves eastward to the Southern Plains and weakens to a dryline on Thursday. Showers and thunderstorms will Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php