Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 256 AM EST Tue Feb 12 2019 Valid 12Z Tue Feb 12 2019 - 12Z Thu Feb 14 2019 ...More heavy snow for the Northwest U.S. and a major winter storm develops for the Great Lakes and Northeast... A developing winter storm will bring widespread moderate to heavy snow to much of the Great Lakes through Tuesday, and then reaching the Northeast by Tuesday night and early Wednesday. The potential exists for 6 to 12 inches of snow from northern Wisconsin to northern Michigan, and even higher amounts across upstate New York and northern New England with 12 to 18 inches possible. A corridor of freezing rain is likely to the south of the heavy snow axis, extending from the central Appalachians to southern New England, and also across southern Michigan. Significant travel impacts are anticipated through Wednesday, and some power disruptions are also possible. Farther to the south in the warm sector of the storm system, an enhanced southerly flow of deep moisture from the Gulf of Mexico will result in a swath of heavy rain and some thunderstorms from the central Gulf Coast to the southern Appalachians. There may be some instances of flash flooding within this region, especially for flood prone areas of the southern Appalachians with rainfall totals in excess of an inch. A series of winter storms impacting the Western U.S. will continue to bring rounds of widespread snowfall to much of the Pacific Northwest, northern/central California, and the northern Rockies. 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. D. Hamrick Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php