107 FXUS01 KWBC 270808 PMDSPD Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 300 AM EST Sat Dec 27 2025 Valid 12Z Sat Dec 27 2025 - 12Z Mon Dec 29 2025 ...Arctic air will descend into the Plains beginning Sunday followed by a potent winter storm across the upper Midwest to the Great Lakes Sunday night to Monday... ...Snow ending across southern New England as snow moves across the Intermountain West... ...More record warmth across the South to the Tennessee Valley this weekend... Much of central and southern New England will wake up with 4 to 8+ inches of snow this morning as a clipper low pressure system continues to press eastward against a Canadian high pressure system that is supplying the cold air. The system will intensify rapidly as it moves swiftly out into the Atlantic during the day today, ending this latest round of winter storm for the Northeast with colder than normal temperatures through the remainder of the weekend. Across the western U.S., the last of a series of energetic low pressure systems is moving well inland and will bring a round of snow across the Intermountain region, with rain showers farther south across the Four Corners. This system will begin to interact with an arctic air mass currently sliding southeastward across western Canada and bring a round of snow across the northern and central Rockies as well as the nearby High Plains today into tonight. The speed of this system will limit the snowfall amounts. But at the same time, the speed of the cold air intrusion will plunge temperatures to below zero in Montana by Sunday morning with wind chills below -30 degrees under blustery northerly winds. The "Blue Norther" will continue to surge southward through the central and southern Plains on Sunday as a low pressure system rapidly intensifies along the arctic front and accelerates across the Midwest, reaching into the Great Lakes Sunday night. This low pressure system is poised to develop into a large and intense cyclone with blizzard conditions expanding across the Midwest Sunday night. Across the Great Lakes, wind-swept rain and embedded thunderstorms later on Sunday and Sunday night are forecast to turn into a blizzard by early on Monday with blowing snow and possibly whiteout conditions. Snowfall amounts are expected to exceed a foot, particularly along the south shore of Lake Superior. See the WPC key message for more information on this developing storm. Meanwhile, anomalous warmth will be the rule over the mid-section of the country and across the South. High temperatures in the middle 70s to the low 80s are predicted from Texas to the Tennessee Valley for the weekend. Many cities could break or near record warm high temperatures each day, with some records dating as far back as the 1880s. Low temperatures will also be warm in the upper 50s to low 60s. This December soupy airmass will bring chances for fog each day along the Gulf Coast, some which may be locally dense and bring low visibility. Meanwhile, the arctic cold front will bring a drastic end to the warmth on Sunday in the central U.S., with a quick around of strong thunderstorms that signals the arrival of the "Blue Norther". Areas from the Arklatex to the Midwest can expect these thunderstorms to move through Sunday night, followed by the Ohio/Tennessee Valleys and the Deep South into Monday morning. Kong Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php $$