Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 408 AM EDT Wed Aug 23 2017 Valid 12Z Wed Aug 23 2017 - 12Z Fri Aug 25 2017 ...Heavy rainfall and strong thunderstorms expected along a cold front... ...Showers and thunderstorms will continue across the Southern Rockies... A cold front spans from New England to the Southern Plains will continue its easterly trek over the next few days. Once again, this boundary will act as a focus for convection especially in the Carolinas and Texas. On Wednesday, the front will sink southward into the Southeast while stalling across northern and western Texas. Showers and thunderstorms along this front will develop in the afternoon and early evening in the Southeast. Meanwhile, the ongoing precipitation across North Texas is expected to continue as it slowly moves southward--in fact, precipitation will spread into the Big Bend. The heavy rainfall forecasted for this area could bring potential of flash flooding. On Thursday, the front will stall along the Gulf Coast and across Texas. Scattered showers and thunderstorms across the Southeast and Texas will occur--with the coverage increasing by the afternoon and early evening. Farther east, the cold front begins to slow along the Carolinas by Wednesday evening which will give way to heavy rainfall and a marginal risk for severe weather. The front stalls along coastal South Carolina and right off the coast of North Carolina by Thursday evening--bringing more rounds of showers and thunderstorms to this region. By Friday morning, most of the precipitation across these regions will have subsided. The front across the Carolinas will move across the Atlantic and will keep most of the rainfall offshore. Concurrently, heavy rainfall from the remnants of Tropical Storm Harvey will begin to move into the immediate coastal bend of Texas. For the Southern Rockies, sufficient moisture and an upper-level trough to the west will lead to scattered thunderstorms on Wednesday. Some of these thunderstorms could produce heavy downpours which may lead to flash flooding. Thus, a slight risk of flash flooding is possible. Expect the same activity for the Southern Rockies on Thursday afternoon and evening. A weak trough that will drift near Florida will bring an increase in thunderstorms both Wednesday and Thursday afternoons. As the cold front pushes past the Florida Panhandle on Friday morning, dry conditions will follow with thunderstorms ahead of the front in South Florida. Temperatures across the eastern U.S. will be below average behind the cold front. As another cold front approaches across the Pacific Northwest, warmer than average temperatures will be felt across this region in addition to the Northern Rockies. Once the cold front moves past these areas, bringing light showers especially in the higher terrain, temperatures will be near to below average. Reinhart Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php