Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 359 AM EST Wed Dec 30 2015 Valid 12Z Wed Dec 30 2015 - 12Z Fri Jan 01 2016 ...Flooding possible across the Southeast... ...Snow for the Upper Midwest and Great Lakes... Heavy rainfall can be expected over the next couple of days as a slow moving front moves through the Southeast and Mid-Atlantic states. With plenty of Gulf moisture streaming in, numerous showers and thunderstorms will initiate along and ahead of the boundary -- spanning from the Gulf Coast through the Appalachians and toward the Chesapeake Bay. Isolated areas with high rainfall amounts could lead to flash flooding. See the WPC excessive rainfall product for more details. Showers began tapering off across the Northeast late last night, as well as the snow in New England, as the central low pressure associated with the northern system continues to tracks into the Northern Atlantic. A broad upper level low centered over the High Plains will help yield a light snow accumulation for the Northern Plains and the Upper Great Lakes on Wednesday. By Thursday, most of the snow will be lake effect downwind of the Upper and Lower Great Lakes as the upper low moves eastward over the Upper Midwest. Showers will be possible for coastal areas of the Pacific Northwest and California as a weak front dissipates. Higher elevation snow will be possible for portions of the Great Basin and Intermountain West; however accumulations will be likely remain light. Campbell Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php