Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 309 AM EDT Tue May 03 2016 Valid 12Z Tue May 03 2016 - 12Z Thu May 05 2016 ...Severe thunderstorms and heavy rain possible across portions of the Southeast and southern Mid-Atlantic... ...Above average temperatures expected from the interior Northwest to the northern High Plains... A rather slow-moving frontal boundary with multiple waves of low pressure along it will continue to bring rain and thunderstorms to the East Coast states today. The most widespread coverage of showers and thunderstorms is expected from southern portions of the Mid-Atlantic states into the Southeast. The Storm Prediction Center is forecasting a slight risk of severe thunderstorms for portions of this area. Additionally, locally heavy rainfall is possible. A cold front will bring showers and thunderstorms to the Upper Great Lakes today before reaching the Ohio valley and Lower Great Lakes tonight into Wednesday. A low pressure system will evolve across the central Appalachians and Mid-Atlantic region Wednesday night into Thursday morning, bringing showers and thunderstorms to those areas. High pressure at the mid and upper-levels of the atmosphere will keep warm temperatures in place through the next couple days from the interior Northwest to the northern High Plains. Afternoon high temperatures in these areas may reach 15 to 25 degrees above average. Along the Pacific Northwest coast, a slow-moving cold front will bring scattered showers and thunderstorms today. The front will move a little farther inland on Wednesday and Thursday, with scattered showers and thunderstorms possible for portions of the northern Intermountain States. Ryan Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php