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.
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Tropical Storm Guillermo will continue its path toward Hawaii in the coming days bringing large swells and enhanced rainfall to the islands.
A cold front will usher in cooler air into the Northeast this week but not before sending severe storms through the region.
Building heat across Europe this week will approach monthly and all-time record high levels in several cities.
Unsettled weather responsible for flooding downpours in Florida last week will gradually lessen over the next several days.
After months of below-normal rainfall, Santiago, Chile, could finally receive several days of rainfall this week.
Southeastern PA (1991)
A tornado was sighted just out of Lafayette Hill, then briefly touched down in the Chestnut Hill section of Philadelphia, downing trees and damaging some homes.
Moline, IL (1997)
A 79 mph wind gust during a thunderstorm.
Boise, ID (2000)
2 small tornadoes passed just south of the airport.