Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 242 AM EST Tue Nov 27 2018 Valid 12Z Tue Nov 27 2018 - 12Z Thu Nov 29 2018 ...Heavy snowfall will impact parts of New England through Tuesday, with additional snowfall expected downwind of the Great Lakes... ...Heavy precipitation expected across the Pacific Northwest and California over the next few days... ...Well below normal temperatures likely across parts of the Midwest... Heavy snow that has affected the New England interior will continue today as a surface low lifts northward across Maine. Te heaviest amounts will occur in the higher elevations of New England and downwind of Lake Erie--where total snowfall accumulations between 10 to 20 inches are expected. Winter storm warnings and winter weather advisories are in effect across this region through this evening. By tonight, precipitation will begin to taper off. However, lingering show showers will last through midweek downwind of the Great Lakes. Additionally, across both regions - New England and the Great Lakes - gusty winds combined with heavy snowfall will result in hazardous travel conditions. The moderate to heavy precipitation is underway across the Pacific Northwest, northern Rockies, and northern California. Snow and ice accumulations can also be expected throughout the Pacific Northwest in the higher elevations today. By Wednesday, a frontal system will begin approaching California. This will give way to precipitation winding down across the Pacific Northwest and northern Rockies while spreading into central California and southern California. As this system moves inland Thursday morning, widespread precipitation will continue for California and spread into parts of the central Great Basin and central Rockies. A marginal risk of excessive rainfall is possible for southwest Oregon/northwest California today, stretching into California by Wednesday and Thursday. Furthermore, heavy snow will impact the Sierra Nevada--with over 2 feet of total snow accumulation possible. Most of this snowfall will occur between Wednesday evening through late Thursday night. Elsewhere, an upper level disturbance along with a surface boundary will move into the northern Plains late Tuesday night and into early Wednesday morning. This system will bring light snow and freezing rain to North Dakota. Temperatures will remain 10 to 20 degrees below normal for the Mississippi Valley, Midwest and Ohio Valley today. The East Coast stretching down into South Florida will also be below average today. High temperatures will begin to slowly rebound on Wednesday for the central U.S. while remaining quite chilly for the Southeast. The western U.S., High Plains and the southern Plains will remain near or above average through the short term. Reinhart Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php