Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 427 PM EDT Tue Aug 30 2016 Valid 00Z Wed Aug 31 2016 - 00Z Fri Sep 02 2016 ...Heavy rain possible along the Southeast Coast... ...Heavy rain possible along the Eastern Gulf Coast... ...Heavy rain possible over parts of the Central Plains and Southern Rockies... A front extending from the Great Lakes to the Middle Mississippi Valley/Central Plains will move eastward to the Northeast/Mid-Atlantic Coast and southward to Lower Mississippi Valley by Thursday. Showers and thunderstorms will develop along and ahead of the boundary from the Great Lakes to the Central Plains/Middle Mississippi Valley that will move eastward to the Northeast/Mid-Atlantic to parts of the Ohio Valley by Thursday. In addition, the front will help to sweep forecast tropical storm 8 away from the East Coast. The tropical system will produce showers and thunderstorms over parts of the Carolina Coast and the Southern Mid-Atlantic Coast through Wednesday evening. Upper-level energy over the Southeast Coast will move northeastward out over the Western Atlantic by early Thursday morning. The system will also produce showers and thunderstorms over the Southeast Coast on Tuesday evening moving to the Southern Mid-Atlantic Coast on Wednesday, moving off the coast by Thursday morning. Check the latest forecast from the National Hurricane Center for the most up to date track and intensity of T. D. 8. In the meantime, T. D. 9 is forecast to move close to the Eastern Gulf Coast by Thursday. The tropical moisture associated with the system will produce showers and thunderstorms over the Eastern Gulf Coast through Thursday. Check the latest forecast from the National Hurricane Center for the most up to date track and intensity of T. D. 9. Meanwhile, a deep upper-level trough just off the Pacific Northwest will move onshore by Wednesday moving farther inland by Thursday. A plume of moisture will move onshore over parts of the Pacific Northwest overnight Tuesday followed by onshore flow Wednesday evening into Thursday. The moisture will aid in producing rain over parts of the Pacific Northwest Wednesday into Thursday. Elsewhere, monsoonal moisture and daytime heating will produce showers and thunderstorms over the Southern/Central Rockies Tuesday and Wednesday afternoon and evening. Also, upper-level energy and moisture from the Western Gulf of Mexico will aid in producing showers and thunderstorms over parts of the Southern Plains/Western Gulf Coast Tuesday evening into Wednesday evening. Furthermore, upper-level energy over the Central High/Central Plains will aid in producing showers and thunderstorms over the region through Thursday. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php