Potentially devastating Hurricane Sandy will even have a wintry aspect, that of heavy wet snow, to go along with its inundating surge, damaging winds and flooding rain.
Along the a stretch of the southern Appalachians, strong winds and clinging snow could down trees and power lines, triggering power outages.
Rain turning to snow Monday night and Tuesday could yield plowable snowfall from the Pennsylvania Laurel Highlands southward over West Virginia into western Virginia.
Higher ridges of West Virginia, above 3,000 feet of elevation, could see falls of 1 to 3 feet by Wednesday.
Travel may become difficult to impossible over these highlands.
Interstate highways I-64, I-68, I-77 and I-81 will be subject to wintry travel at higher elevation.
Elsewhere, cold rain may mix with or turn to snow at lower elevation of western West Virginia, eastern Kentucky and even parts of Ohio. Odds are that any accumulation of snow here would be slushy and confined mostly to grassy surfaces.
Thumbnail photo provided by Photos.com.
After an earthquake hit in the area, the Bardarbunga volcano erupted Friday in Iceland, causing a temporary no-fly order.
The North Central states face the most adverse weather this Labor Day weekend, in the form of severe storms and tornadoes which will threaten lives and travelers.
As Cristobal loses its tropical characteristics, attention is turning toward the Bay of Campeche for potential development next week.
The Pittsburgh area will have a turbulent stretch of sun and intermittent thunderstorms for the next several days, including storms that could impact Labor Day weekend plans.
An outbreak of severe weather, including tornadoes, will evolve on Sunday from the northern and central Plains to part of the Upper Midwest.
After another big cooldown, warm and humid weather will bounce back in Boston, during the Labor Day weekend.
Houston, TX (1980)
2.23 inches of rain fell in less than 1 hour. Streets were flooded in the downtown district and a tornado touched down briefly west of Houston at Sealy, TX.
Pittsburgh, PA (1982)
39 degrees, coldest ever in August.
Anchorage, AK (1989)
A total of 9.6 inches of rain -- wettest August on record.