WEATHER

MISSOURI — A violent polar vortex–fueled bomb cyclone triggered an extraordinary temperature collapse of up to 55 degrees Fahrenheit across Missouri, marking one of the most extreme 24-hour temperature swings seen this winter. Newly analyzed temperature-change data shows the cold front racing southeast through the Central Plains, Midwest, and Lower Mississippi Valley, replacing mild air…

UPPER PENINSULA AND LOWER MICHIGAN — A powerful winter system delivered significant snowfall across Michigan’s Upper Peninsula, while strong winds and lighter accumulations created a chaotic and hazardous day across Lower Michigan and parts of the western Great Lakes. Snowfall totals clearly show the Upper Peninsula as the hardest-hit area, with some locations seeing well…

NEW JERSEY, PENNSYLVANIA, AND DELAWARE — A surge of Arctic air combined with persistent strong winds is driving dangerously low wind chill values across much of the Mid-Atlantic, with the harshest conditions expected tonight. According to the latest wind chill data, feels-like temperatures are falling into the teens across most of New Jersey, eastern Pennsylvania,…

UNITED STATES — Newly analyzed long-range jet stream and upper-air data shows a significant shift toward a more storm-favorable winter pattern for the Northeastern United States, driven by strong Greenland blocking. The setup raises confidence that multiple snow opportunities and periods of stormy weather may begin to emerge across New York, Pennsylvania, New Jersey, and…

MIDWEST AND GREAT LAKES — Long-range tropical forcing analog data now strongly supports a prolonged Arctic cold pattern developing across the Midwest and Great Lakes, rather than a brief or isolated cold snap. The data shows a large, well-defined region of below-average temperature anomalies setting up across multiple states, signaling that cold air is likely…

UNITED STATES — Forecasters are closely monitoring a developing storm pattern that could bring winter weather impacts to Pennsylvania, New Jersey, New York, Massachusetts, and Connecticut between January 7 and January 9, according to long-range model guidance and ensemble trends. While confidence remains moderate at this range, meteorologists say the overall setup is increasingly supportive…

MICHIGAN — A powerful lake-effect snow event is unfolding across Michigan, with forecasters warning that dangerous, potentially life-threatening travel conditions are expected through late Sunday night and into early Monday, particularly across the Upper Peninsula and northern portions of the Lower Peninsula. According to updated snowfall projections issued Sunday evening, significant snow accumulation combined with…

NORTHERN CALIFORNIA — A magnitude 5.0 earthquake rattled large parts of Northern California on Sunday afternoon, striking about 9 miles northwest of Susanville and sending noticeable shaking across rural communities in Lassen County and into western Nevada. According to seismic data shown in the ShakeMap images, the earthquake occurred at 4:41 p.m. local time and…

ILLINOIS / WISCONSIN / MINNESOTA — A major winter storm is intensifying across the Upper Midwest on Sunday and will continue into early Monday, bringing heavy snowfall, blizzard conditions, and dangerously strong winds that could make travel extremely hazardous across large parts of Minnesota, Wisconsin, and northern Illinois. Forecast data from the National Weather Service…

MINNESOTA — A major winter storm is sweeping across the Upper Midwest, bringing blizzard warnings, heavy snowfall, powerful wind gusts, and potentially life-threatening travel conditions from Sunday through early Monday morning, according to the latest regional forecasts and National Weather Service data. Blizzard Warnings and Winter Storm Alerts Expand Across the Region The most severe…