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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Those looking for a break from the heat across the central United States will be in luck as a slow cooldown is in store starting this weekend.
The midwestern United States will be in the crosshairs of potent thunderstorms into Saturday night.
Much of the eastern United States will continue to swelter with above-average temperatures into the end of the month.
Conditions will deteriorate across Hawaii this weekend as Darby delivers locally heavy rain and rough surf. But the tropical storm will provide long-term benefits.
Stifling heat has been baking the central United States but will finally ease across northern areas this weekend.
Lightning killed a teenager on Friday, the second teen lightning death in three days. With thunderstorms continuing to rattle several parts of the nation, more lives will be at risk.
Heat Wave: Location New Record(F): Old Record(F)/Year: Washington, D.C. 101 100/1987 Philadelphia, PA 99T 99/1978 Atlantic City, NJ 100 96/1987 Harrisburg, PA 103 98/1987 Baltimore, MD 103 98/1987 (Custom House)
New Zealand (1995)
Extreme cold - a bay in Littleton Harbor froze for the first time in "living memory".
Simla, CO (1996)
4.5" diameter hail.