To find out what is happening now with the crushing Northeast snowstorm, click here.
This map shows the expected storm total snowfall on non-paved surfaces through Saturday night. However, in the heaviest snowfall areas, a slippery, slushy accumulation is likely even on major highways. A few pockets within the heaviest snow band can receive from one to two feet of crushing snow with snowfall rates possibly reaching 2 to 4 inches per hour, complete with thunder and lightning.
A foot of heavy wet, back-breaking snow will plaster areas north and west of I-95 Saturday, causing massive power outages, downed trees and travel nightmares.
The storm will hit hard and fast, traveling from southwest to northeast over the mid-Atlantic and New England in less than 24 hours. In most of the mid-Atlantic the storm began as rain, but a change to snow will progress throughout the day.
The heaviest snow from the storm will stretch from along the Virginia/West Virginia border through a large swath of central and eastern Pennsylvania to southeastern New York state, northwestern New Jersey, northern Connecticut, central and western Massachusetts to southern New Hampshire and southwestern Maine.
Cities and towns that are likely to receive the heaviest snowfall include: Torrington, Conn., Hagerstown, Md., Springfield, Mass., Nashua, N.H., Netcong, N.J., Kingston, N.Y., Honesdale, Pa., Winchester, Va., Brattleboro, Vt. and Martinsburg, W.Va.
In these areas and others over the interior Northeast, the snow will come down hard enough to accumulate on the roads making for slippery driving. The worst conditions will be in the hilly areas and the mountains, where slightly lower temperatures are in store.
Thousands of trees could come down, and over a million people could be without power. Some rural roads could be blocked for days by fallen trees. Driving or walking through wooded areas during and immediately following the storm could be dangerous.
Thunderstorms could accompany the snow (and the rain), adding to the drama. A freeze-up will follow the storm Saturday night into Sunday morning leading to areas of black ice.
While the heaviest accumulation will miss the I-95 cities from Washington, D.C., and Baltimore to Philadelphia, New York, Providence and Boston, some wet snow will fall on the heart of the downtown areas and can cover rooftops, trees and grassy areas before the storm moves away.
A burst of snow is likely to hit the I-95 cities at the tail end of the storm. Even so, streets in the downtown areas of these cities will be mainly wet.
Because of the intensity of the rain and snow, with increasing winds, expect flight delays and cancellations in the Northeast and ripple-effect delays elsewhere throughout the nation.
The storm will bring a period of heavy rain and the potential of urban flooding along the coast of the mid-Atlantic and the immediate southern and eastern coasts of New England.
The storm will turn into a "Halloween Weekend Screamer" in New England. Not only will some communities be battling problems from heavy snow, but also dramatically increasing winds that will also down trees and wires.
Powerful northeasterly winds will cause coastal flooding along east- and northeast-facing shorelines of New England. For part of the region, this could be an Irene with snow.
Expert Senior Meteorologist Brett Anderson has an early look at the coming storm the Maritimes in his Canada Blog.
It's Not a Halloween Prank
Snowfall during October is not uncommon in the Northeast in general, but when it does occur it typically only falls on a very narrow swath, high elevations or a relatively small patch of land.
According to Expert Senior Meteorologist Henry Margusity, "During this storm, the extent of places that may receive 6 to 12 inches is unprecedented."
Unlike many storms which tend to underachieve, this one will overachieve and is likely to be a record-breaker.
This storm will catch many people off guard because of its intensity and fast-hitting nature.
The forward speed of Saturday's storm is in contrast to another storm that hit the Northeast in the days surrounding Halloween in 1991.
The "Perfect Storm" hovered for days off the Atlantic Coast and was most noted for strong winds and coastal flooding, along with a major motion picture later on.
After a springlike Tuesday in Boston, a rainy Wednesday will transition to a snowy, rapid freeze Wednesday night.
After a springlike Tuesday in Philadelphia, a stormy Wednesday will be followed by an icy rapid freeze up Wednesday night.
After a springlike Tuesday in New York City, a rainy Wednesday will be followed by an icy, rapid freeze Wednesday night.
Rain is in the forecast leading up to the start of the Formula 1 Season in Melbourne this weekend.
Damaging thunderstorms will threaten North Carolina to the southeast Pennsylvania on Wednesday.
A storm system will move east through the Rockies and spread snow into the Plains during the day on Tuesday.
Fort Collins, CO (1998)
5 degrees - tied for the coldest reading of the winter - the first winter on record (since 1889) with no 0 degree readings.
New York/New England (1888)
The Blizzard of '88. (See also March 12). Middletown, CT - 50" of snow Concord, NH - 27.5" of snow Newark, NJ - 19" of snow
Heavy rain and high wind for much of the state. 5.24" of rain at Melbourne; a 56 mph wind gust at St. Augustine; rain mixed with sleet at Tampa.