Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 356 AM EDT Wed Jul 25 2018 Valid 12Z Wed Jul 25 2018 - 12Z Fri Jul 27 2018 ...Heavy rains will continue to raise flooding concerns across portions of the Mid-Atlantic and Northeast through Wednesday... ...Strong to severe thunderstorms possible for portions of the northern and central Plains to the upper Midwest... ...Dangerous heat to continue across the Southwest and portions of the West Coast... ...Risk of heavy rainfall leading to flash flooding for the central/southern Rockies and central High Plains... Deep moisture will continue to be brought up from the Southeast into the Mid-Atlantic and Northeast today. Once again, periods of showers and thunderstorms that could produce heavy rainfall is possible. Because of saturated soil conditions, flash flooding will remain a concern. A moderate risk remains across coastal North Carolina northward into the the Mid-Atlantic and along the southern portions of New York. The upper low and surface cold front will finally aid in pushing precipitation offshore on Thursday; however, heavy rainfall is expected for the northern portions of New England. Therefore, a slight risk of flash flooding will be possible mostly for portions of Maine. An organized area of low pressure is expected to pushing east from the northern High Plains into the Upper Midwest. By this afternoon, a cold front will stretch across the Upper Midwest westward into the central Plains and High Plains. Showers and thunderstorms are expected to develop along this boundary. Some of these storms could be strong to severe--thus, the Storm Prediction Center has highlighted a slight risk for these regions. By Thursday, the showers and thunderstorms along the cold front will move toward the lower Great Lakes and the Ohio Valley. There is a marginal risk of severe thunderstorms for parts of the upper and lower Great Lakes. Showers and thunderstorms will continue their easterly trek along the Ohio valley and into the lower Mississippi Valley by Friday. Dangerous heat still remains across the Southwest and parts of the western U.S. where excessive heat warnings and heat advisories remain in effect through at least Thursday. Temperatures begin to moderate by Friday--although will still be above the century mark especially for southern California and the Southwest. Elsewhere, showers and thunderstorms are expected today and Thursday across portions of the central and southern Rockies and the adjacent Plains. These thunderstorms could produce flash flooding especially over favored terrain and recent burn scars. Reinhart Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php