Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 352 PM EDT Sat Apr 09 2016 Valid 00Z Sun Apr 10 2016 - 00Z Tue Apr 12 2016 ...Late season cold spell with snow for the northeastern states... ...Slight risk for severe thunderstorms Sunday and Monday for the Central and Southern Plains and lower Mississippi Valley... ...Numerous showers expected over the Desert Southwest and California... The low pressure system that much cooler temperatures and widespread precipitation to the Mid-Atlantic and Northeast will push offshore this evening. High pressure will expand into the eastern third of the U.S. by Sunday as another low pressure system advances through the Northern and Central Plains. Temperatures tonight will drop near or below freezing, which may tie or break minimum temperature records. A vast portion of the Mid-Atlantic, Appalachians and eastern Ohio/Tennessee Valleys have Freeze and Hard Freese Warnings in effect. The Midwest and Tennessee/Ohio Valleys will be numerous showers and thunderstorms as a warm front lifts through on Sunday and the cold front pushes through Sunday night into Monday. The Storm Prediction Center has highlighted northern Texas and northern Oklahoma/southern Kansas as having a slight risk for severe storms on Sunday. The area of concern will shift to the east on Monday, encompassing eastern Texas/Oklahoma, Arkansas and northern Louisiana. These storms could potentially produce heavy rainfall. Numerous showers and a few thunderstorms are forecast for much of the Southwest over the next couple of days as a low pressure system approaches the California coastline and a nearly stationary boundary spans from southern Idaho to the southern Rockies. The heaviest precipitation is expected over the Sierra Nevadas Range, where snow is likely at the highest elevations. Much of this rain and mountain snow will be welcomed drought relief, especially as we are nearing the end of the rainy season. A majority of the Pacific Northwest will have little to no precipitation this weekend. Campbell Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php