Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 256 PM EST Sat Mar 10 2018 Valid 00Z Sun Mar 11 2018 - 00Z Tue Mar 13 2018 ...Slight risks of severe thunderstorms and flash flooding through Saturday night... ...Another developing low will bring snow to the Eastern Seaboard by Sunday night and Monday... ...Rain and mountain snow for the southwestern U.S. through Sunday night... A front across the Lower Mississippi Valley and Southeast U.S. will combine with sufficient moisture to cause rain and thunderstorms over those areas. Some storms could be strong to severe, particularly for the Lower Mississippi Valley, through Saturday night. Additionally, storms are forecast to train over the same area, leading to locally high rainfall totals. Thus, there is a slight risk of flash flooding through Saturday night from eastern Arkansas through portions of Mississippi and Alabama through Saturday night. Rain will continue on Sunday in the Southeast as a surface low pressure system moves eastward and the front lingers across the region. A surface low located over the Carolinas will begin strengthening and moving northward on Sunday night and Monday. Snow is possible on Sunday night and into Monday morning from the Southern Appalachians northward into the Mid-Atlantic, and is expected to spread into the Northeast by Monday evening. The Southern Appalachians is forecast to receive 4 to 6 inches of snow on Sunday night into Monday. Additional snow is possible after Monday evening for the Northeast U.S., so stay tuned for updates. In the western U.S., relatively high moisture for this time of year will lead to precipitation in California and into the Southwest. Rainfall of up to an inch is possible, and some locally heavy rainfall could produce flooding in Southern California Saturday night, especially over burn scars. Farther east, the higher elevations of the Southern Rockies are expecting snow. 2 to 4 inches is possible for New Mexico through Sunday evening. Tate Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php