Story has been updated 12/6/2010 2:00 pm....
A storm that will take shape by the middle of December will cross the country and could end up developing into a major snowstorm for portions of the mid-Atlantic and New England.
There are different storm track scenarios at this point that mean the difference between mostly rain or a potential blizzard along the Interstate 95 corridor from Washington, D.C., to Boston.
So far, Chief Long Range Forecaster Joe Bastardi has been correct with the Winter Forecast for the Northeast with his prediction that late November to December would be cold and stormy for many.
According to Bastardi, "Repetitive cold waves and the threats of storms will keep hitting parts of the East in the weeks leading up to Christmas."
"One or two of these storms has the potential to become a major snowstorm for portions of the mid-Atlantic and New England, including the storm that may hit the East from December 12-14."
Expert Senior Meteorologist Henry Margusity has also been warning about how the cold pattern in the East could soon yield the season's first major snowstorm.
Scenario One: Major Snowstorm for Interior Northeast
The storm would then cut across the interior Northeast in the first scenario. Mild air would be drawn into the I-95 corridor, making it a rainstorm for the big Northeast cities.
Scenario Two: Major Snowstorm for Interstate 95 Corridor
"If the storm brushes up the Eastern Seaboard, several inches of snow could lead to major travel disruptions in the big cities from Washington, D.C. to Philadelphia and New York City to Boston," according to AccuWeather.com Expert Senior Meteorologist Carl Erickson.
On top of heavy snowfall, blustery winds would add to this winter storm scenario by causing blowing snow and potential whiteout conditions at times.
Lake-effect snow to the lee of the Great Lakes would be likely to accompany this scenario as well with an arctic blast of air blowing across the relatively mild water of the Great Lakes.
Erickson points out that there is one other possibility with this storm, stating "One other scenario is that the storm takes shape too far off the coast, which would promote a frigid, dry northwesterly flow of air into the Interstate 95 corridor. If this were to occur, there would be potential for even more heavy lake-effect snow downwind of the Great Lakes."
The coldest air of the winter will plunge southward across much of the eastern United States and will feature single-digit and sub-zero temperatures in the Northeast during the Valentine's Day weekend.
A storm spreading snow across the mid-Atlantic will slow travel and cause delays with some areas expected to pick up over a half a foot of snow.
Episodes of snow and slippery travel will affect the mid-Atlantic states and parts of New England through Thursday.
Denver Broncos fans celebrating the Super Bowl win will see ideal conditions for Tuesday's parade and pep rally.
A new study has found that nearly a tenth of cereal crops have been wiped out due to droughts and heat waves between 1964 and 2007.
As winter weather approaches, concern for pet safety grows. Make sure you know these useful tips.
Washington, D.C. (1870)
President Grant signed a measure establishing a Federal meteorological service; later assigned to Signal Corps, U.S. Army. Riverside Ranger Station 1933 -66 deg., U.S. record for Feb. (48 states). Yellowstone Park
Stillwater Reservoir, NY (1934)
State record low temperature -52 degrees.
New York City, NY (1934)
Absolute minimum -15 degrees.