Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 357 AM EDT Sat Jun 02 2018 Valid 12Z Sat Jun 02 2018 - 12Z Mon Jun 04 2018 ...Severe weather threat moves into the south central Mississippi Valley today... ...A wet weekend ahead for the Mid-Atlantic with heavy rainfall and flash flooding possible... ...Warm overnight temperatures could break records for many locations from the southern Plains to the Northeast... Showers and thunderstorms will continue to develop along and ahead of a cold front pushing eastward through the Great Plains and the Mississippi Valley today. Conditions will be ripe for heavy rainfall and severe weather, particularly across portions of the south/central Mississippi Valley from far northeast Texas to Missouri. The primary threat will be large hail and damaging winds, but isolated tornadoes and flash flooding cannot be ruled out. The SPC has highlighted this region within a slight risk for Saturday and Saturday night. As the cold front marches eastward on Sunday and into Monday, showers and thunderstorms will move into the Ohio and Tennessee Valleys and parts of the Deep South. An incredibly moist atmosphere remains locked in place this weekend across the Mid-Atlantic which will lead to a rather wet weekend. Tropical moisture streaming northward into the region will interact with a stalled surface low and frontal boundary to produce daily thunderstorms and possible organized heavy rainfall events, especially on Saturday. Given the already very saturated soils, flooding and flash flooding will be a concern. The WPC day 1 excessive rainfall outlook shows a moderate risk and flash flood watches are currently in effect from northern Virginia to southern New Jersey. As for temperatures across the country, locations from the southern Plains to the East Coast will continue to be quite warm and muggy this weekend. Afternoon high temperatures will be generally 5 to 10 degrees above normal for most locations, except across parts of the southern Plains where values in the upper 90s to low 100s are possible, which could approach or exceed records for a few places. The bigger story with this warmth however will be the very warm overnight temperatures, with widespread lows in the 70s expected from the southern Plains to the middle Mississippi Valley and also parts of the Eastern states. These kinds of temperatures could break overnight high minimum records for dozens of locations. Santorelli Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php