Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 415 PM EDT Tue Aug 29 2017 Valid 00Z Wed Aug 30 2017 - 00Z Fri Sep 01 2017 ...Heavy rainfall will shift to the north and east of Houston over the next few days... ...A risk of tornadoes possible across areas in the Southeast and the Lower Mississippi Valley... ...Rain will continue across the Mid-Atlantic through Wednesday morning... ...Record heat will persist over the western U.S... As Tropical Storm Harvey continues its northerly trek toward the western Louisiana coast, the heavy precipitation will begin to taper off along the western edges of the greater Houston area. Overnight, there will be a shift in the heavy precipitation to the north and east of Houston. The heavy rainfall will also still remain along the upper Texas coast through Wednesday morning as Harvey makes landfall. There is still a high risk of flash flooding that will extend to Wednesday morning. In addition, heavy rainfall is also expected to continue along the central Gulf Coast with a moderate risk of flash flooding. Once inland, Harvey will weaken to a tropical depression while the axis of heavy precipitation spreads across the Lower Mississippi Valley, Southeast, and the Tennessee Valley. As Harvey lifts northward into the Lower Mississippi Valley by Thursday, heavy rainfall will occur across the Tennessee Valley and begin to move into the Ohio Valley. Rainfall will also increase across Georgia and the Carolinas. In terms of the risk of tornadoes, the threat will primarily concentrate along the Central Gulf Coast through tomorrow morning. Once the center of Harvey moves farther into Louisiana, the risk will shift north across parts of the Lower Mississippi Valley and the Southeast. For more information, see the Storm Prediction Center. Overall, expect 6 to 12 inches, with locally higher amounts, of additional rainfall in south and eastern Texas over the next two days. Potential Tropical Cyclone Ten will move north and east along the North Carolina coastline. Widespread moderate rainfall will continue through Delmarva through tonight. As the low center of Potential Tropical Cyclone Ten moves farther away from the coast by late tonight and into the early hours of Wednesday morning, rainfall across this region will decrease. By Wednesday afternoon, all precipitation will end across the Mid-Atlantic region. Well below normal temperatures can be expected across the Eastern Seaboard through the short term period. Record breaking heat will continue to plague the western U.S. as an upper level ridge will dominate over this half of the country. Daily temperature records are likely to be broken from California to the Central Great Basin and even the interior of the Pacific Northwest. No relief will be in sight as the ridge persists overhead through the short term period. However, the high temperatures are expected to slowly climb back down on toward near normal values by Thursday and into the beginning of the holiday weekend--with the exception of California. Reinhart Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php