Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 342 PM EDT Wed Nov 01 2017 Valid 00Z Thu Nov 02 2017 - 00Z Sat Nov 04 2017 ...Heavy rainfall along the central Gulf Coast will come to an end tonight... ...Locally heavy precipitation likely across the Midwest and lower Great Lakes with some light accumulating snows continuing across the upper Mississippi Valley tonight... ...Heavy mountain snowfall likely across parts of the Pacific Northwest and the northern Rockies... Expect heavy rainfall to continue this evening, coming to an end overnight, across portions of the central Gulf Coast along a weakening frontal boundary. Isolated flash flooding and severe weather will be possible. Lingering showers and thunderstorms remain in the forecast the next few days from the central Gulf Coast through the Tennessee Valley as moisture returns northward around a surface high pressure system stationed over the Eastern U.S.. Temperatures from the Southern Plains to the Eastern U.S. on Thursday and Friday will also be 10 to 20 degrees above normal ahead of a front approaching from the north. Snow showers on the north and west side of a low pressure system moving quickly through the upper Mississippi Valley should come to an end by tomorrow. Light accumulations are still possible, especially along the north shore of Lake Superior where favorable winds over the relatively warm water will enhance snowfall. Winter weather advisories and winter storm warnings remain in effect this evening across parts of northern Minnesota and Wisconsin. To the south, widespread rainfall is likely along the associated frontal boundary as it moves eastward through the Midwestern states and into the lower Great Lakes and New England by Friday. Locally heavy rainfall is possible. To the north of this frontal system, expect temperatures to be chilly with afternoon highs 5 to 10 degrees, maybe as much as 20 degrees, below average across the northern and central Plains and back into the northern Rockies. Out west, the western edge of this front should remain stationary across the northern Rockies the next few days which will keep heavy mountain snows in the forecast with accumulations near or exceeding a foot in the highest terrain. A strong upper level system dropping southward along the western Canadian coast and into the Pacific Northwest will further enhance this snowfall as well as allow for widespread rain and mountain snows to spread into the Pacific Northwest and the northern Intermountain West. Santorelli Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php