Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 359 AM EDT Sat Oct 28 2017 Valid 12Z Sat Oct 28 2017 - 12Z Mon Oct 30 2017 ...Strong cold front to deliver heavy rainfall across the eastern U.S... ...Snow possible for portions of the Northern Rockies... Widespread rain is expected along a cold front as it passes through the Gulf states/Ohio and Tennessee Valleys/ Great Lakes and into the Mid-Atlantic and Northeast over the next few days. A few areas may have mixed precipitation, or snow, on the backside of the front where cold air will be streaming in. As the cold front approaches the Mid-Atlantic, heavy rainfall will enter the Appalachians and Lower Great lakes this afternoon. A marginal risk for excessive rainfall is in effect for much of the Appalachians today, as well as, a slight risk for south Florida. By Sunday, most of the heavy rainfall will occur in the Northeast and New England-- with a slight chance of flash flooding from eastern Pennsylvania/New Jersey to western Maine and a moderate risk for upstate New York, Vermont, northern New Hampshire and northwest Maine. Rain is expected to linger across the region into Monday morning. Strong, gusty winds will accompany this system throughout the Mid-Atlantic and Northeast. Most of the snowfall activity is expected in the Upper Great Lakes on Saturday; by Sunday, there could be very light snow showers in the higher elevations of the West Virginia mountains. Snow will be possible across portions of the Northern Rockies this weekend as another cold front pushes southward from Canada. With an upper-level ridge anchor over the West Coast, most locations west of the Divide will remain dry and warmer, with afternoon high temperatures averaging 10 to 15 degrees above seasonal normal. The central and eastern states will have cool and seasonable temperatures over the next few days. Campbell Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php