National Weather Service United States Department of Commerce

Winter Storm Shifting From the Central U.S. to the Northeast; Severe Thunderstorms in the South

A winter storm will track to the Lower Mississippi River Valley by Monday and across the central Appalachians Monday night to southern New England by Tuesday. A swath of snow, sleet and freezing rain will spread from the Central Plains east into southern New England by Monday and Tuesday. Severe thunderstorms with damaging winds and tornadoes are possible over the northern Gulf Coast on Monday. Read More >

Overview

A significant winter storm tracked northeast across the western Great Lakes bringing with it a swath of heavy, very wet, dense snow during one of the busiest travel days of the year. Disrupting holiday travel, snow was wet and dense leading to very difficult, if not impossible travel conditions at times. In fact, the liquid equivalent within the snowpack was record breaking for the day of November 27th! The combination of high liquid water content and an overall "warmer" atmosphere aloft led to very wet snow, with snow-to-liquid ratios around 5-6:1 throughout the event. For comparison, the "fluffier" snow we typically see with lake-effect snow events are around or higher than 15-20:1. Due to the wet, dense snow another major impact was widespread power outages across the Upper Peninsula and sporadic tree damage.  

Strong northeast winds caused blowing snow, sharply reductions in visibilities, and drifting snow. These strong northeast winds also cuae waves to build along the Lake Superior and Lake Michigan shorelines, cause Lakeshore Flooding in some areas. 

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Not record snowfall, but a record amount of liquid equivalent for November 27th, from the wet, dense snow.
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