Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 416 PM EDT Thu Jun 10 2021 Valid 00Z Fri Jun 11 2021 - 00Z Sun Jun 13 2021 ...There is a Moderate Risk of excessive rainfall over parts of the Tennessee and the Lower Mississippi Valleys and parts of the Mid-Atlantic... ...There is a Moderate Risk of severe thunderstorms over parts of the Northern Plains through Friday morning... ...Extreme to Elevated Fire Weather conditions are in place across much of the Interior West... A front extends from the Mid-Atlantic to the Upper Great Lakes then westward to the Northern High Plains trailing off the southwest over the Great Basin. The main low will move eastward to the Great Lakes by Saturday evening, while parts of the boundary will linger over parts of the Mid-Atlantic. Multiple upper-level impulses are east of the Mississippi River, one over the Mid-Atlantic, second over the Middle Mississippi Valley, and the third over the interior Central Gulf Coast. The upper-level energy over the interior Central Gulf Coast will produce showers and thunderstorms, some with heavy rain. The WPC has issued a Moderate Risk of excessive rainfall with these thunderstorms. The associated heavy rain will create numerous areas of flash flooding. Furthermore, many streams may flood, potentially affecting larger rivers through Friday morning. Also, the thunderstorms over the Mid-Atlantic will produce heavy rain over the region. The WPC has issued a Moderate Risk of excessive rainfall with these thunderstorms. The associated heavy rain will make numerous areas of flash flooding. Furthermore, many streams may flood, potentially affecting larger rivers through Friday morning. The area ahead of the front in the Rockies will be venerable to fire weather conditions. There will be low relative humidity and gusty wind in the area ahead of the front, which has led to an Extreme Risk of fire weather over parts of the Rockies/Great Basin. Meanwhile, the part of the front over the Northern Plains will produce showers and thunderstorms. The SPC has issued a Moderate Risk of severe thunderstorms over the Northern Plains through Friday morning. The hazards associated with these thunderstorms are frequent lightning, severe thunderstorm wind gusts, hail, and a few tornadoes. There is a 10% or greater probability of wind gust of 65 knots or greater over parts of the Northern/Central Plains. Additionally, there is a 10% or greater probability of two-inch or great hail over parts of the Northern/Central High Plains through Friday morning. Moreover, some of the highest elevations of the Northern Rockies will get snow on Thursday evening into Friday. The severe thunderstorm threat weakens on Saturday and moves to the Central Plains/Middle Mississippi Valley. Scattered showers and thunderstorms will develop east of the Mississippi River on Friday and Saturday. With the upper-level energy over the Mid-Atlantic, the WPC has issued a Moderate Risk of excessive rainfall over the area on Friday into Saturday morning. The associated heavy rain will produce numerous areas of flash flooding. Furthermore, many streams may flood, potentially affecting larger rivers through Saturday morning. In the meantime, a weak front will come onshore over the Pacific Northwest on Friday and dissipate by Saturday morning. The system will produce rain over parts of the Pacific Northwest through Saturday afternoon. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php