Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 300 PM EST Tue Feb 12 2019 Valid 00Z Wed Feb 13 2019 - 00Z Fri Feb 15 2019 ...Flash flooding for the California Coast and heavy mountain snow across the West... ...A major winter storm develops for the Great Lakes and Northeast... Coastal and lower elevation rain, along with heavy mountain snow, is forecast to continue across much of the western states as multiple fronts move onshore through the end of the week. Conditions will be favorable for heavy rain along the central and southern Californian coast which will maintain an elevated risk for flash flooding, and possibly debris flows near recent wildfire burn scars. A slight Risk for excessive rainfall is in effect for these areas through Thursday morning with an increasing threat for southern California through Friday morning. A Moderate Risk is in effect through Friday morning for much of the area from Santa Barbara to San Diego. Given the presence of below normal temperatures across this region already, snow levels remain low with accumulating snowfall likely just above sea level for western Washington and Oregon. The most significant snowfall is expected across the higher terrain of the Oregon Cascades, Sierra Nevada, and Siskiyou Mountains, where 1 to 3 feet of snow is likely through the middle of the week. A winter storm is currently spreading moderate to heavy snow across the the Upper Midwest and Great Lakes region, a wintry mix across the northern Mid-Atlantic and Northeast, and moderate to heavy rain to the eastern Ohio/Tennessee Valley and the Appalachian region. Flash flooding may develop, especially for flood prone areas of the southern Appalachians with rainfall totals in excess of an inch. A broad Marginal Risk is in effect with a smaller area of Slight Risk for excessive rainfall along the Tennessee and North Carolina border. This system will continue to pass through the East through midweek. Another winter storm system will develop over the central U.S. and bring another round of widespread winter precipitation and hazardous impacts to much of the Upper Midwest, Great Lakes and Northeast regions Thursday and beyond. Campbell Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php