Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 258 AM EST Sat Feb 10 2018 Valid 12Z Sat Feb 10 2018 - 12Z Mon Feb 12 2018 ...Flooding rainfall possible from the lower Mississippi into the southern/central Appalachians and northern Mid-Atlantic today/tonight... ...Accumulating snow to impact locations from the Colorado Rockies into the Midwest and northern New England... ...Freezing rain expected from the middle Mississippi valley into the Northeast this weekend... A strong front extending from the northeastern U.S. into Texas will help set the stage for an unsettled weekend over much of the eastern U.S. Bitter cold air, with current early Saturday morning temperatures of -10 to -20 over eastern Montana, will continue to move south today. High temperatures over the central and northern Plains will only reach the single digits to teens today, while locations ahead of the front warm up into the 50s and 60s...from the Mid-Atlantic into the Tennessee valley with 70s along the Southeast Coast. Several rounds of snow will affect the central U.S. to the Northeast over the next 36 hours, each producing light to locally moderate accumulations. By Sunday morning, an additional six to twelve inches of snow is expected into the higher terrain of the Colorado Rockies with three to six inches likely from northern New York into far northern New England. Lighter amounts are forecast in between, from the Colorado Front Range into the central Great Lakes. On the warm side of the cold front, moisture will advect northeastward from the Gulf of Mexico into the southern and eastern U.S., supporting a broad threat for flooding today from the central Gulf Coast into the northern Mid-Atlantic region with a greater focus over Tennessee into the southern Appalachians where roughly two to four inches of rain will be possible through Sunday. In between the snow and rain will be a transition region of freezing rain with light to perhaps locally moderate icing possible from the middle Mississippi valley, along the Ohio River and into interior sections of the Northeast. Out west, temperatures will drop back closer to normal behind a series of cold fronts. Light mountain snow and lower elevation rain will follow a cold front as it tracks south across the Four Corners region today. Outside of Colorado, snowfall accumulations from this system should be light. A second cold front will enter the Northwest U.S. Sunday night and bring light snow to the northern Rockies and northern Great Basin. Precipitation totals from these systems is forecast to be light through Monday morning. Otto Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php