A two-part, major winter storm will bring significant snow and ice to the mid-Atlantic and Northeast through Groundhog Day, snarling travel in some areas.
Snow and an icy mix from the first part of the storm are covering roadways this morning and making for slippery roads in the Northeast.
An Appetizer of Snow and Ice Today
Heavy snow was falling from the Mohawk Valley of New York right to Boston and the Massachusetts coast.
Snow will fall into the early afternoon from northern Pennsylvania and upstate New York into central and southern New England, mainly north of the I-80 corridor.
A general 2 to 4 inches of snow will fall from this first episode, with locally 8-inch amounts along the I-90 corridor.
Travel will be poor along much of the I-80 corridor from eastern Ohio through New Jersey as a result of snow, sleet and freezing rain into the afternoon.
Freezing drizzle will continue around the New York City, Philadelphia, Baltimore and Washington, D.C., I-95 zone through the midday hours with major roads just wet, but secondary roads, ramps and parking lots icy in some locations.
Major Snow, Dangerous and Damaging Ice on Groundhog Day
A second batch of more significant snow and ice will spread over and overshadow the first batch in the mid-Atlantic and Northeast late tonight and through Groundhog Day.
Up to a foot of new snow will pile up in cities such as Buffalo, Albany and Portland. At the peak, near-whiteout conditions will create dangerous conditions for those who venture outdoors.
In Boston, the combination of both storms will bring close to a foot of snow with much higher amounts across the northern and western suburbs.
To view a larger version of this map, visit the AccuWeather.com Winter Weather Center.
Roadway and airport closures are possible at the height of the storm.
The more dangerous aspect of this multi-faceted storm will unfold across much of eastern Ohio through Pennsylvania and into southern New England. Freezing rain and sleet will be the main threats, making for dangerous travel.
Cities that might get 0.25 of an inch of ice, and locally more, include Providence, R.I.; Hartford, Conn.; White Plains, N.Y.; Netcong, N.J.; Allentown, Reading, York, Scranton, Williamsport, Du Bois, Altoona and State College, Pa., as Expert Senior Meteorologist Alex Sosnowski stated yesterday.
For a significant part of this area, freezing rain accruing on exposed and elevated surfaces will add weight, leading to downed trees and power lines. Some neighborhoods could be without power for days in the wake of the double-barreled storm.
Any ice will transition to plain rain as temperatures surge above freezing from Baltimore to Philadelphia. In Pittsburgh and Washington, D.C., the storm tonight into Wednesday will primarily be a rain event.
For New York City and nearby suburbs, the second storm will end as rain and drizzle Wednesday, but not before a period of ice build-up occurs tonight into morning drive Wednesday.
People in the northern and western suburbs from Baltimore through Philadelphia could face ice-covered secondary roads for the morning drive Wednesday that may be more like a "morning slide."
AccuWeather.com Facebook fan Erich shovels snow off his roof this past weekend in advance of the Groundhog Storm in Haddam, Conn.
For portions of New England and part of the New York Metro area, the added weight from snow and ice on some flat roofs could prove to be too much, leading to collapse of these structures.
Expert Senior Meteorologist Alex Sosnowski contributed to the content of this story.
Severe thunderstorms with the risk of a few tornadoes will advance eastward across the northern Plains and Upper Midwest into Friday.
A dangerous outbreak of severe storms will strike the northern High Plains and Canadian Prairies on Wednesday.
Join us on Thursday for AccuWeather LIVE as we will discuss the debate of climate change and hurricane frequency and the top five things you need to know about summer weather.
A tornado touched down at Denver International Airport as a severe weather system moved through the area.
A brief synopsis of the top five worst weather events of last summer.
Warmth is forecast to build over much of the eastern half of the nation by July, with Alaska of all places helping out.
Southeast China (1932)
Hailstorm in Hunan Province killed 20 people and injured thousands of others.
Custer Creek, MT (1938)
Cloudburst; 48 killed in a train wreck.
Philadelphia, PA (1994)
Strong thunderstorm winds blew off a large section of a hanger roof and also damaged two aircraft.