Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 404 AM EDT Mon Sep 03 2018 Valid 12Z Mon Sep 03 2018 - 12Z Wed Sep 05 2018 ...Continued thunderstorms with severe and flash flooding potential are expected for portions of the Plains to Upper Midwest... ...Widespread rain is forecast across the Southern Plains into the Lower Mississippi Valley... ...Potential Tropical Cyclone Seven could cause heavy rainfall and flooding for southern Florida on Monday and parts of the central Gulf Coast on Tuesday... The Plains and Upper Midwest will continue to have scattered to widespread thunderstorms through at least midweek as a stalling front lingers over the region. Some of the storms will have the potential to be severe this afternoon across the western Dakotas. Numerous areas could have heavy rain and flooding concerns over the next couple of days, which will aggravate ongoing flooding. Slight to moderate risks of flash flooding are in effect through the beginning of the week, with the highest impacts expected for parts of Iowa and Wisconsin. Areal averages of 2 to 4 inches with isolated 5+ inches can be expected from the Central Plains to the Upper Midwest/Upper Great Lakes region. Potential Tropical Cyclone Seven is currently forecast to track over the Florida Keys today and heading toward Louisiana by Tuesday. Abundant tropical moisture will accompany this system and will create a heavy rain threat for south Florida and the Keys today, where 2 to 4 inches of rain will be possible with isolated higher amounts. Please see the National Hurricane Center's website for additional information on this potential tropical cyclone. Widespread heavy rain will be possible over the next few days for much of the Lower Mississippi Valley/Central Gulf states. Strong moisture convergence will be present along the Gulf Coast prior to tropical system pushing inland, which will lead to continued heavy rain and thunderstorms along the upper Texas and Louisiana coast. This moisture and an upper-level trough just to the west will combine to produce widespread rain over parts of the Southern Plains. Once the tropical cyclone moves inland and tracks further into Louisiana the threat for heavy rain and flash flooding will elevate to Moderate per WPC's Excessive Rainfall Outlooks. Campbell Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php