Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 448 AM EDT Fri Aug 07 2020 Valid 12Z Fri Aug 07 2020 - 12Z Sun Aug 09 2020 ...There is a Slight Risk of excessive rainfall over parts of the mid Atlantic... ...There is a Slight Risk of severe thunderstorms over parts of the Upper Midwest... ...A wildfire risk remains elevated across portions of the western U.S... A quasi-stationary front will linger across the mid Atlantic and Southeast through Sunday. The boundary will aid in producing showers and thunderstorms over the region with the greatest areal coverage during the late afternoon and late evening hours. Some of the thunderstorms will be slow moving, capable of producing very heavy rainfall over a short period of time, resulting in a flash flood threat. The flash flood threat will be increased from portions of the Carolinas into the Northern Mid-Atlantic states where the soil moisture is elevated due to recent heavy rainfall. An upper level disturbance will track eastward through Southern Canada Friday into Friday night, with a cold front following at the surface. Ahead of the front, expect showers and thunderstorms, some of which could be severe. The Storm Prediction Center has issued a Slight Risk of severe thunderstorms on Friday/Friday night across northern Plains into the Upper Mississippi Valley. The severe threat shifts slightly southward for Saturday as the cold front slowly advances south and east. Across the western U.S., gusty winds and dry relative humidities remain favorable for the rapid spread of wildfires. Meanwhile across the Southwest, the monsoon season will remain rather inactive through at least this upcoming weekend, with most thunderstrms staying south of the U.S. border. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php