The snowstorm headed to the Northeast created this wintry scene in northeastern Missouri. Photo submitted by Facebook fan Lewistown StormWatcher on Dec. 25, 2010.
The storm bringing a rare White Christmas to the South will turn into a monster snowstorm, complete with blizzard conditions, across the mid-Atlantic and New England on Sunday into Monday. A nightmare awaits holiday travelers.

The corridor from Salisbury, Md., to New York City to Boston to Portland will be faced with roughly 18 hours of heavy, wind-whipped snow.

Total snow accumulations within this zone will exceed a half of a foot. Strong winds will significantly blow and drift the snow around.

As the storm reaches its peak intensity, an all-out blizzard should unfold over New England.

Disruptive snow will even expand westward to Washington, D.C., Philadelphia and Albany.

The worst of this monster storm will slam the Delmarva during the day on Sunday, New York City Sunday afternoon and night and Boston Sunday evening into Monday morning.

A nightmare is in store for holiday travelers. "People may have problems getting home from holiday ventures," Expert Senior Meteorologist Alex Sosnowski declared when first warned of this snowstorm potential.

Snow-clogged roadways and reduced visibility awaits motorists who decide to venture out during the snowstorm.

Travel may become nearly impossible across New England as an all-out blizzard ensues Sunday night into early Monday morning.

The above graphic gives the timing of the major snowstorm. For the latest snowfall accumulations, visit the
Airline passengers across the mid-Atlantic should prepare for cancellations on Sunday. The best time to travel to and from southern New England on Sunday will be during the morning since conditions will deteriorate later in the day.

The nightmare for travelers will continue into Monday despite the snowstorm coming to an end.

Fierce winds following the storm will keep whipping the snow around, threatening to cause more flight cancellations and poor travel for motorists.

Improving weather Tuesday into Wednesday should give delayed holiday travelers an opportunity to finally reach their destinations.