From the Great Lakes to Florida, Arctic Cold and Snow Build Toward a High-Impact Winter Threat

A cold start felt coast to coast

Winter tightened its grip early Monday as 77 million people woke up under cold weather alerts across two vast regions of the United States. One stretched from the northern Plains to the Northeast, the other reached deep into Florida, United States.

Wind chills plunged sharply. In northern areas, values dropped to 20 to 30 degrees below zero. Even Florida felt the bite, with wind chills falling into the 20s and 30s.

The alerts in Florida were expected to expire by midmorning, but the cold lingered. Afternoon highs remained 10 to 25 degrees below average, keeping much of the country locked in a midwinter chill.

Coldest days shift eastward

The cold core of this air mass slid east with time.

Monday marked the coldest day for the Upper Midwest and Great Lakes, while Tuesday became the coldest day for the Northeast. In New York, NY, wind chills stayed in the single digits and teens for much of Tuesday, making even short trips outside feel punishing.

The cold air did not arrive alone. It carried snow.

Lake-effect snow buries familiar snowbelts

Snow developed quickly across the Great Lakes region, driven by cold air flowing over relatively warmer lake waters. Heavy lake-effect bands set up in typical snowbelt areas.

General snowfall totals ranged from 6 to 12 inches, but localized amounts were much higher. In the Tug Hill Plateau of New York, United States, totals reached 2 to 3 feet.

Road conditions deteriorated fast. Near Grand Rapids, MI, harsh winter weather was blamed for a 100-car pileup that shut down Interstate 196 in both directions for hours.

Cars spun. Traffic stopped. The storm made its presence known.

Clipper systems keep snow moving midweek

As lake-effect snow continued, a fast-moving clipper system dove south out of Canada on Tuesday.

Snow spread into the Dakotas, MN, and Iowa, with Minneapolis, MN seeing light accumulations. By Wednesday, the same system zipped across the Great Lakes, bringing light snow to Chicago, IL, before pushing into the interior Northeast and New England later in the day.

These midweek systems brought classic winter scenes but modest totals. The cold was sharp, but not record-setting. That changes later in the week.

A more dangerous cold blast takes shape

Forecasters turned their attention to the next surge of arctic air.

Beginning Friday, another blast of cold is expected to hit the northern Plains and Upper Midwest, then spread across the Plains, Midwest, Southeast, and Northeast through the weekend.

Wind chills are forecast to plunge to 30 below zero, with isolated spots potentially reaching 40 to 50 below zero. By Sunday, parts of the Northeast and New England are expected to see below-zero wind chills.

Meteorologists say this could be the coldest air of the season so far, and possibly the coldest of the entire winter.

Storm potential grows for the weekend

How far south the arctic air reaches will determine the impact of a developing winter storm.

Forecast signals strengthened early in the week, pointing toward a high-impact system capable of producing widespread snow and ice from Friday through Sunday. The most likely targets include the southern Plains, the lower Mississippi Valley, and the Southeast, United States.

There is also potential for wintry precipitation to expand north into the Northeast, but forecasters emphasized uncertainty. The precise placement of snow, ice, and rain remains unclear.

Even so, confidence was high enough for early warnings. The National Weather Service in Fort Worth, TX, began alerting residents to the risk of freezing temperatures and a messy wintry system later in the week.

Cold air is already in place. Snow keeps coming. The next chapter of winter is lining up fast.