Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 332 PM EDT Fri May 13 2016 Valid 00Z Sat May 14 2016 - 00Z Mon May 16 2016 ...Severe thunderstorms possible across portions of the central U.S. and the southeast U.S. coast... ...Below average temperatures expected for much of the central and eastern U.S. this weekend... A cold front will bring showers and thunderstorms to the East Coast tonight before moving offshore. Some thunderstorms may become severe across eastern portions of the Carolinas as well as southeastern Virginia, where the Storm Prediction Center is forecasting a slight risk of severe thunderstorms. Another cold front will bring showers and thunderstorms to areas from the southern/central plains to the Mid-Mississippi valley and Great Lakes tonight. The Storm Prediction Center is forecasting a slight risk of severe thunderstorms through tonight across portions of the southern/central plains and the Mid-Mississippi valley. This cold front will spread another round of showers and thunderstorms into the Mid-Atlantic and Northeast on Saturday. The second cold front will usher a much cooler air mass into the central and eastern U.S. Temperatures on Saturday are forecast to be 10 to 25 degrees below average across a large area of the plains, Midwest, Great Lakes, and Ohio valley. The chilly temperatures will expand to the Northeast and Mid-Atlantic regions on Sunday. Showers and thunderstorms will increase across the Pacific Northwest tonight as a frontal boundary and upper-level disturbance move onshore. On Saturday, showers and thunderstorms will spread into the interior Northwest and the northern Intermountain West as the system moves inland. By Sunday the system will move into the central/northern Rockies, with snow possible at the highest elevations. Showers and thunderstorms will also increase across the southern and central plains again by Sunday as a stationary frontal boundary lingers and southerly flow spreads moisture into the region. Ryan Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php