Fox News Weather Center

Lake-effect snow to follow early week warmup across midwestern, northeastern US

Following a brief early week warmup, colder air will arrive by midweek and trigger lake-effect snow downwind of the Great Lakes.

Following the massive blizzard across the mid-Atlantic and portions of New England on Saturday, a much calmer stretch of weather will unfold into midweek.

"Noticeably milder air will make a brief appearance early this week," AccuWeather Meteorologist Renee Duff said. "Locations across the Midwest and Northeast have experienced a week-long stretch of temperatures averaging 5 to 15 degrees below normal."

A storm will move across the central U.S. early this week and allow a return of milder air to build across the midwestern and northeastern United States prior to the storms arrival.

Temperatures will reach the 30s F across much of the Upper Great Lakes on Monday. The milder day across the Northeast will be on Tuesday as highs top out in the 40s. Temperatures during this span will run at least 10 degrees above average across the Great Lakes and Northeast.

"It will feel much warmer considering how cold it has been recently," Duff said.

In areas of a deep snowpack, temperatures may not get out of the 30s. Snow acts as an insulator and keeps the ground much colder than when there is little or no snow.

The milder air along with sunshine will lead to rapid snowmelt and could lead to small stream flooding. As overnight lows fall below freezing, any melted snowpack can freeze on roadways, leading to slippery travel.

An approaching storm will bring light snow across the upper Great Lakes on Monday and rain across the Ohio Valley. Snowfall totals will generally range from 1 to 4 inches with local amounts close to 6.

Locations farther south from Nebraska and Kansas into western Illinois may deal with areas of freezing rain or drizzle.

By Tuesday, snow showers will continue across the upper Great Lakes as temperatures will be above freezing for precipitation to be mostly in the form of rain across the Northeast. Some snow showers could mix in from central Pennsylvania into central New York.

Should there be enough moisture left as it reaches the Interstate 95 corridor from D.C. to New York City, precipitation will be in the form of rain and not snow.

The brief mild spell will be slashed as a cold front will move through during Tuesday and Tuesday night and allow bands of lake-effect snow to develop.

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"Cold air flowing over the relatively warmer Great Lakes will allow for lake-effect snow to ramp up on Wednesday," Duff said.

The lake-effect event is expected to be short lived and only produce minor accumulations from Michigan to western New York.

Temperatures by midweek will be near or slightly below average across much of the Midwest and Northeast. Highs will be mainly in the 20s and 30s.

Anyone traveling near the Great Lakes on Wednesday should still use caution when approaching a snow band as visibility could be greatly reduced, despite low accumulations.

Some places downwind of the Great Lakes may receive an additional 1 to 3 inches by Wednesday night.

A fast-moving clipper system will pass across the Great Lakes on Thursday which will cause the lake-effect snow to shut off. Much of the region will be free from precipitation as the snow will remain across southern Canada.