(State College, PA) - An intensifying Nor'easter will not show any love for the Northeast on this Valentine's Day. Blizzard conditions continue from upstate New York to New England, while a treacherous wintry mix of precipitation has created travel problems along the Interstate 95 corridor from Boston to Washington, D.C. Behind the storm, drier weather will allow the Midwest and South to start cleaning up after Tuesday's pounding.

The national radar not only shows the large area of snow and wintry mix that covers the Northeast this morning, but also the drier weather that has returned to the Midwest and South.

The Winter Weather Center has details on the widespread winter-related warnings in effect across the Northeast on this Valentine's Day.

The storm today will continue to intensify into a powerful Nor'easter as it heads north. Blizzard conditions from upstate New York to Maine will result in blowing and drifting snow and dangerously low visibility. With plenty of moisture in the atmosphere ready to be unloaded, over a foot is forecast from northern Pennsylvania to Maine and more than 18 inches forecast from the western Catskill Mountains of New York to the higher terrain in Maine.

Road and air travel in the Northeast today will be extremely difficult. The Flight Delay Map has up-to-date information on airport delays across the nation. Air travelers should also check with their airline before heading to the airport.

Along the Interstate 95 corridor from Boston to Washington, D.C., warm air being drawn into the storm is turning the precipitation to a nasty mix of snow, ice pellets, freezing rain and rain. The icy weather overnight is being blamed for a deadly six-vehicle crash on New Jersey's Garden State Parkway. Freezing rain in New Jersey led to power outages in Cape May County.

As the storm shifts farther north and colder air arrives, the precipitation Philadelphia to New York City will turn back to snow by this afternoon. Tonight, cold air will create areas of black ice along the Interstate 95 corridor, creating more hazardous travel conditions from Boston to Washington D.C.

The East Regional News story has additional details on today's storm across the Northeast.

Arctic air will return to the Northeast in the wake of the storm. The frigid air will bring back significantly lower RealFeel® temperatures, while strong westerly winds blowing over the long fetch of open water will result in more lake-effect snow to the lee of Lake Ontario.

Traffic backs up on the westbound lanes of Interstate Highway 94 in Detroit on Tuesday. A snowstorm enveloped southern Michigan with strong winds and slick roads causing dangerous conditions. (AP Photo/Carlos Osorio)

The clash Tuesday of warm, moist air and the cold air in place across the Midwest created a widespread swath of snow across the region. As reported in the Midwest Regional News story, the storm dumped 15.8 inches on an area just southwest of Springfield, Ill. The city of Springfield officially received 11.2 inches, the 4th greatest 24-hour snowfall in the city's history.

Strong northeast winds created blinding blizzard conditions and hazardous travel. Visibility fell to less than a quarter of a mile in Pontiac, Ill., leaving motorists stranded and vehicles in ditches. According to the Associated Press, the snowstorm forced the University of Illinois in Champaign to cancel classes for the first time since 1979.

AP reports a nine-year-old girl died when an ice-covered tree limb fell on her as she walked her dog and at least four people were killed in weather-related traffic crashes. A prolonged period of ice brought down trees and power lines across the southern parts of Illinois, Indiana and Ohio.

The warm side of the storm Tuesday sparked severe storms across the Gulf Coast. An elderly lady was killed when a tornado tore through the Gentilly district of New Orleans, one of the areas hardest hit by Hurricane Katrina. More than two dozen people were injured and dozens of homes, FEMA trailers and buildings were damaged when the powerful storms plowed through the Gulf Coast region.

The Special Weather section on the News Summary page reports the clash of Gulf moisture with colder air pouring in from the northwest sparked the early morning tornado activity across southeastern Louisiana and southern Mississippi.

If you have photos from the Valentine's Storm, register with the AccuWeather.com Weather Photo Gallery and upload them. The latest photos tagged with the word "snow" are shown below.