Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 325 AM EDT Mon Jun 27 2016 Valid 12Z Mon Jun 27 2016 - 12Z Wed Jun 29 2016 ...Flash flooding possible for the central and southern Appalachians and surrounding foothills... ...Severe thunderstorms possible for the central High Plains... ...Mostly dry conditions with above average temperatures are expected to continue for the West... A cold front will bring scattered to numerous showers and thunderstorms today from the Northeast to the lower Mississippi valley and southern plains. Showers and thunderstorms are expected to be the most widespread from the Tennessee valley into the Appalachians. Heavy rainfall amounts of 1 to 2 inches, with locally higher amounts, are possible today and tonight across portions of the central and southern Appalachians as well as the surrounding foothills, and flash flooding is possible for these areas. On Tuesday, scattered showers and thunderstorms will linger across the southeastern U.S. and north along the East Coast as the cold front weakens but another front quickly arrives in its wake. A wave of low pressure at the surface will result in more widespread showers and thunderstorms on Tuesday across the Northeast, which could continue into Wednesday for New England. Across the central plains, scattered showers and thunderstorms are expected today and tonight along a slow-moving cold front. Some storms may become severe across the central High Plains, and the Storm Prediction Center is forecasting a slight risk of severe thunderstorms for this area through tonight. The front will linger across the same areas into Tuesday, with additional strong to severe thunderstorms possible. Farther west, high pressure at the mid and upper-levels of the atmosphere will keep conditions mostly dry and hot. A few isolated thunderstorms are possible across portions of the southwestern U.S. as well as interior portions of the Northwest. High temperatures today and Tuesday are forecast to be 10 to 15 degrees above average across much of the western U.S. Temperatures will reach well into the 90s at the lower elevations of the Great Basin and Intermountain West, with a few areas even reaching 100 degrees. Ryan Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php