Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 326 AM EDT Thu Jun 29 2017 Valid 12Z Thu Jun 29 2017 - 12Z Sat Jul 01 2017 ...Severe thunderstorms and heavy rain possible today from the central Plains to the mid-Mississippi valley... ...Gradually rising temperatures forecast across the West Coast states... An elongated frontal boundary is expected to bring scattered to numerous showers and thunderstorms from the Plains to the Northeast today through Friday. Severe thunderstorms along with heavy rain are possible today from the central Plains to the mid-Mississippi valley. On Friday, the threat for severe weather will shift a bit southward and eastward, from the southern plains through the mid-Mississippi valley to portions of the lower Great Lakes and the Northeast. Farther south, a weakening stationary frontal boundary will along with a moist and unstable air mass will produce scattered to numerous afternoon and evening showers and thunderstorms across much of the Gulf Coast and the Southeast. Showers and thunderstorms should become more numerous across the Southeast Friday night into Saturday as moisture and instability move farther north ahead of the incoming cold front. Across the western U.S., generally dry conditions will prevail through the next couple days. A building upper-level ridge will support rising temperatures across the West Coast states. High temperatures are forecast to be 5 to 10 degrees above average from California to Washington. By Friday, highs across these same areas will warm further with some areas reaching 15 degrees above average, particularly in the Pacific Northwest, where some areas will rise into the 90s. Ryan Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php