Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 329 AM EDT Tue Sep 22 2015 Valid 12Z Tue Sep 22 2015 - 12Z Thu Sep 24 2015 ...Heavy rain possible across portions of the southwestern U.S. from the remnants of Tropical Depression Sixteen-E... ...Showers and thunderstorms may bring heavy rain to the central/northern plains and Upper Midwest tonight into Wednesday... The remnant mid and upper-level circulation from Tropical Depression Sixteen-E will continue to move across the southwestern U.S. today, bringing scattered to numerous showers and thunderstorms. Heavy rainfall and flash flooding will continue to be possible, with some areas expected to receive an additional 1 to 2 inches of rainfall. The Southwest should begin to dry out by tonight into early Wednesday as the mid/upper-level low moves northeastward across Colorado and into the central plains. Meanwhile, a cold front will become stationary from the central plains into the Upper Midwest today. As the mid/upper-level low associated with the remnants of Sixteen-E moves into the central plains by Wednesday morning, it will combine with the lingering frontal boundary to produce numerous showers and thunderstorms from the central plains to the Upper Midwest. This system will move slowly across the central plains, and the potential for showers and thunderstorms will continue into Thursday. Heavy rain will be possible in these areas, with the potential for more than 2 inches of rain in some areas. A surface low over the Atlantic Ocean will drift west-southwestward toward the southeastern U.S. over the next couple days. This will result in a gradual increase in chances for showers and thunderstorms by Wednesday and Thursday, particularly in areas along the Southeast U.S. coastline. Ryan Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php