Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 359 PM EDT Sun Sep 02 2018 Valid 00Z Mon Sep 03 2018 - 00Z 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... ...A potential tropical cyclone could cause heavy rainfall for southern Florida on Monday... Multiple rounds of heavy rainfall and thunderstorms are possible in parts of the Plains to the Upper Midwest over the next couple of days. A stalling front will linger across these areas on Monday before another cold front approaches on Tuesday, creating more possibilities for rain as moisture from the Gulf of Mexico remains in the area. Many of these areas have already seen excessive rainfall recently, and river flooding is ongoing in some locations. Any additional rainfall will exacerbate the ongoing flooding. Slight to moderate risks of flash flooding are in effect through the beginning of the week. The Storm Prediction Center has parts of the Central Plains outlooked with a slight risk for severe weather as well. Convergence along the Gulf Coast and copious amounts of moisture will lead to continued heavy rain and thunderstorms along the upper Texas and Louisiana coast on Sunday night. The heavy rainfall could produce flash flooding, especially in urban areas. The plume of ample moisture is expected to shift a bit west on Monday and Tuesday. The moisture and an upper-level trough just to the west will combine to produce widespread rain over parts of the Southern Plains. Slight risks of excessive rainfall/flash flooding are in effect for western Texas on Monday and Tuesday. Though conditions have generally been dry there, enough rain falling in one location could still cause flash flooding. A potential tropical cyclone is forecast to form near the Florida Keys on Sunday night. This potential tropical cyclone plus plenty of tropical moisture will create a heavy rain threat for the Florida peninsula on Monday, particularly in southern Florida. The cyclone is forecast to continue moving northwestward and approach the central Gulf Coast by Tuesday night. Please see the National Hurricane Center's website for additional information on this potential tropical cyclone. Tate Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php