Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 404 AM EDT Sat Sep 01 2018 Valid 12Z Sat Sep 01 2018 - 12Z Mon Sep 03 2018 ...Severe thunderstorms and heavy rainfall to impact portions of the Plains and Mississippi Valley... ...Localized heavy rainfall and flash flooding will be possible for portions of the Southwest/Southern Rockies and along the Gulf Coast... Much of the Northern/Central Plains and the Middle/Upper Mississippi Valley will have widespread thunderstorms as a front passes through and stalls over the region this weekend. A nearly continuous, deep plume of Gulf moisture will transport northward and aid in the development of strong convection. Strong to severe thunderstorms will likely develop per the Storm Prediction Center today across portions of the Plains and Middle/Upper Mississippi Valley. Heavy rainfall over this area will likely aggravate ongoing flooding, especially for parts of southern Minnesota and Wisconsin where an additional 2 to 4 inches is expected. Showers and thunderstorms will continue along the boundary into Sunday. WPC has a slight risk for excessive rainfall and flash flooding in effect for parts of this region through early Tuesday morning. Monsoonal moisture and daytime heating will aid in producing showers and thunderstorms over parts of the Southwest/Great Basin and the Central/Southern Rockies. Localized heavy rainfall will be possible. WPC has highlighted a Slight Risk for parts of the Texas panhandle and New Mexico border for Monday. The greatest areal coverage will be during the late afternoon into the late evening hours. Additionally, widespread showers and thunderstorms are expected to fire up over the central Gulf Coast. Several inches of rain can be expected over the next couple of days. Localized flooding may occur. Campbell Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php