Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 343 AM EDT Sun Aug 07 2016 Valid 12Z Sun Aug 07 2016 - 12Z Tue Aug 09 2016 ...There is a slight risk of severe thunderstorms for portions of Montana today... ...Heavy rain possible from the eastern Gulf Coast to to the Mid-Atlantic... ...Heavy rain possible for parts of the Central Plains and Midwest... A cold front pushed off the Northeast and Mid-Atlantic coast last night and will continue tracking over the Atlantic. The mid-section of the front will be very slow-moving across the Carolinas and westward through the Lower Mississippi valley and southern Plains. Scattered to widespread showers and thunderstorms will initiate along the boundary. Very moist air over the region combined with slow storm motion will increase the risk for heavy rainfall and flash flooding - especially for the central Plains and the eastern Gulf Coast, the Southeast and Southern Appalachian/Mid-Atlantic region. A cooler and drier airmass will overspread much of New England to the Mid-Atlantic and will continue over the Midwest into the northern Plains as surface high pressure builds in behind the front. Another cold front will move south and east through southern Canada bringing additional showers and thunderstorms to portions of New England. Out west, a series of weak upper level disturbances interacting with monsoonal moisture will to generate widespread showers and thunderstorms across the Four-Corners region in the southern Rockies. As the disturbances move off to the northeast into the central Plains so will the focus for convection. Furthermore, upper-level energy over the Northern Rockies/Northern Intermountain Region will produce showers and thunderstorms over the area today. Some of the storms may become severe - the Storm Prediction Center has a slight risk area identified for north-central Montana. By Monday the showers and thunderstorms will move into parts of the Northern High Plains. Onshore flow will aid in producing light rain over parts of the Pacific Northwest on Sunday into Monday. Campbell Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php