Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 317 AM EDT Fri Jun 07 2019 Valid 12Z Fri Jun 07 2019 - 12Z Sun Jun 09 2019 ...Widespread moderate to heavy rains with possible flash flooding to continue across the southeastern U.S. into the weekend... ...Severe thunderstorms likely for portions of the northern Plains on Thursday... ...Well below-normal temperatures moving east across the northwestern U.S.... A slow moving area of low pressure interacting with deep tropical moisture will continue to produce widespread moderate to heavy rains across the southeastern U.S. into the weekend. The heaviest rainfall totals on Friday are expected to focus along the Gulf Coast from southeastern Louisiana to the Florida Panhandle and farther to the north along a slow-moving frontal boundary settling south into the southern Mid-Atlantic, southern Appalachians and Tennessee valley. The Weather Prediction Center is highlighting these areas with a Slight Risk for excessive rainfall on Friday. As the system slowly drifts east, the potential for heavy to excessive rains is expected to decrease across the the lower Mississippi valley and central Gulf Coast on Saturday. However, moderate to heavy rains are likely to continue farther to the east, especially from the Florida Panhandle northward into the southern Appalachians. Southeasterly winds, drawing ample moisture into the higher terrain may result in several inches of rain falling along the southern Appalachians from northern Georgia and Upstate South Carolina to western North Carolina. The Weather Prediction Center is highlighting this area with a Moderate Risk for excessive rainfall on Saturday into Sunday. Over the western and central U.S., a strong cold front will continue to push east from the northern Rockies into the High Plains on Friday. Temperatures ahead of front are forecast to well-above normal, with daytime highs reaching into the upper 80s to lower 90s across much of the northern Plains and upper Midwest on Friday. Thunderstorms are expected to develop during the afternoon ahead of the front, with severe thunderstorms likely by late Friday afternoon and evening across portions of the western and central Dakotas, southeastern Montana and northeastern Wyoming. The Storm Prediction Center is highlighting this area with an Enhanced Risk for severe weather, noting the significant potential for damaging winds and large hail. Much colder air will continue to settle in behind the front, with daytime highs 10-20 degrees below normal expected across the Pacific northwest into the northern Great Basin and northern Rockies on Friday. This airmass is forecast to shift east, spilling across the Rockies into the northern High Plains on Saturday. This will result in some high elevation snows from the Olympics and Cascades to the northern Rockies on Friday into Saturday. Pereira Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php