Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 357 PM EDT Wed Sep 09 2015 Valid 00Z Thu Sep 10 2015 - 00Z Sat Sep 12 2015 ...Heavy rain possible for portions of New England on Thursday... ...Severe thunderstorms possible for portions of the central plains on Thursday... A relatively strong cold front will move eastward across the Northeast and Mid-Atlantic states tonight into early Thursday morning. The trailing end of the cold front will slow its forward movement from the southern plains into the Tennessee valley. As a result, scattered to numerous showers and thunderstorms are expected from the southern plains into the Southeast, Mid-Atlantic, Appalachians, and Northeast tonight into Thursday. A wave of low pressure is forecast to develop along the front across the Mid-Atlantic on Thursday, which will move northeastward along the coastline and prolong the rain and thunderstorms for eastern New England into the first part of Friday. Rainfall amounts of 1 to 2 inches are forecast from portions of the northern Mid-Atlantic into eastern New England Thursday into early Friday -- and localized flash flooding may be possible, especially across eastern New England. As the front stalls, showers and thunderstorms will persist from the southern plains into the Southeast into Friday, before a secondary cold front, with a significantly cooler and drier air mass behind it, moves southward and overtakes the original frontal boundary. Temperatures in this post-frontal air mass will be 5 to 10 degrees below average across the central and northern plains and the Upper Midwest on Friday. Additional showers and thunderstorms are possible along the secondary cold front Thursday afternoon, from the central plains into portions of the Great Lakes. The Storm Prediction Center is forecasting a slight risk of severe thunderstorms across portions of the central plains on Thursday. Please refer to products issued by the SPC for further details on the severe weather threat. Ryan Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php