Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 508 PM EDT Tue May 05 2020 Valid 00Z Wed May 06 2020 - 00Z Fri May 08 2020 ...There is a Slight Risk of severe thunderstorms over parts of the Southern Appalachians eastward to the Carolina Coast... ...Temperatures will be 10 to 15 degrees above average over the Southwest and 10 to 20 degrees below average from the Middle Mississippi Valley/Tennessee Valley to the Northern Mid-Atlantic... ...Excessive Heat Warnings are in effect for parts of Southeastern California and Red Flag Warnings are in effect for parts of the Southwest, Southwestern Colorado, and the Florida Panhandle... Low pressure over the Carolinas into the Mid-Atlantic along with a very moist air mass will aid in developing showers and thunderstorms over parts of the Southern Appalachians eastward to the Carolina Coast. The Storm Prediction Center has issued a Slight Risk of severe thunderstorms over this area through the evening. The primary hazards associated with the severe weather will be damaging wind and hail. Along with the storms, associated heavy rain may produce isolated flash flooding. The low pressure will move off the coast by Wednesday afternoon and move northward just off the coast to keep the threat of light rain over parts of the Mid-Atlantic to New England through Thursday morning. Elsewhere, above average temperatures will continue from southern California into the Desert Southwest and the Great Basin. High temperatures across these regions are expected to be 10 to 15 degrees above average for several days to come. In contrast, much below average temperatures will persist across the northeastern quarter of the nation from the Upper Mississippi Valley, Great Lakes, and Ohio Valley to the mid Atlantic. Across these areas high temperatures are expected to be 10-20 degrees below average. Portions of the Upper Ohio Valley, central Appalachians and mid Atlantic may see record cool maximum daytime temperatures today and Wednesday. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php