Arctic cold, lake-enhanced snow, a rapid freeze up and blowing snow are all hazards across the Midwest and Northeast in the wake of the weekend snowstorm.
While the snowstorm departs and focuses on Atlantic Canada, residents and motorists from the Great Lakes to the Northeast should not let their guard down.
Fresh arctic cold will keep pouring across these regions through Monday, while snow showers bring additional accumulations to the Great Lakes.
The cold threatens to cause wet and slushy areas to turn icy, while heavy powdery snow that recently fell will easily get blown around by gusty winds.
More accumulating snow will then spread from Minneapolis to New York City and Boston Monday through Tuesday night.
There is significant concern for wet and slushy spots to turn icy as invading colder air plummets temperatures blow freezing.
This threat is greatest across southern New England, southeastern New York, eastern Pennsylvania and northern New Jersey where the snowstorm ended as rain and/or temperatures on Sunday rose to or past the freezing mark.
Sub-freezing air invaded southern New England, causing an immediate freeze up threat in Boston and Providence.
The fresh arctic air from the northern Plains shifted to the Northeast on Monday, causing temperatures to be held to the single digits in the St. Lawrence Valley and struggling to reach the freezing mark in New York City, Philadelphia and Washington, D.C.
The Midwest is dealing with dangerously colder AccuWeather.com RealFeel® temperatures this Sunday due to brisk winds, which the Northeast will have to endure on Monday.
The cold winds will also have no trouble blowing and drifting the powdery snow that fell over the weekend across the Midwest, upstate New York and northern New England. This includes areas in the vicinity of Detroit, Mich., and Albany, N.Y.
The 18.0 inches measured by a WeatherNet6, a volunteer weather observer, at Woodford, Vt., topped the snowstorm's total list.
Elsewhere in the Northeast, the snow ending as a period of freezing rain or plain rain prevents blowing snow becoming an issue.
The wind-swept snow threatens to create additional hazards for motorists by reducing visibility and once again coating roads that crews had already cleaned. That is especially true in rural and open areas.
As the fresh arctic air pours eastward, snow showers will stream across the Great Lakes with the lake-effect mechanism enhancing the snow downwind of the lakes.
Several inches of snow is expected to fall through Monday on top of the snow from the weekend winter storm and the preceding severe lake-effect snow event. Motorists should prepare for slow travel on portions of I-75, I-81 and I-90.
As the lake-enhanced snow winds down, another system will return snow to the Great Lakes and Northeast Monday through Tuesday night. This will generally be a nuisance snow, but will evolve into a more disruptive event across eastern New England.
Unsettled weather in Atlanta will continue into this week, with the chance of thunderstorms remaining for the area through Tuesday.
After showers and thunderstorm come through the area on Monday, Detroit will see a period of slightly cooler temperatures for much of the week.
After the new week begins with stormy weather, the Cleveland area will see temperatures reminiscent of September move in midweek.
Dallas will see continued periods of heat and dry weather before severe storms bring cooler temperatures midweek.
The first part of this week will feel more like September than the middle of July, typically the hottest time of year, throughout the Midwest.
The hot weather seen across the Northwest over the weekend will carry over into the new week, continuing the risk of heat-related illness.
Albuquerque, NM (1979)
105 degrees -- tied all-time record
Greensboro, NC (1979)
78 degrees -- all-time record high minimum.
Montreal, Quebec (1987)
Severe thunderstorms led to flash flooding and many accidents. Widespread damage; two people were killed. A power outage left dozens stranded in subways overnight.