"But what, exactly, is a blizzard? A blizzard doesn't always mean "a lot of snow," though it can certainly bring heavy snowfalls, as this storm is expected to along parts of the East Coast. Rather, the National Weather Service defines it as a snowstorm with winds regularly above 35 miles per hour and "considerable falling" or blowing snow for at least three hours."
"This weekend's storm could dump one to two feet of snow in the worst-hit areas, and snowfall rates could reach 2 to 3 inches per hour. Wind gusts could reach 40 to 70 mph along the coast from New Jersey through New England. Blizzard conditions can reduce visibility to less than 0.25 mile, which makes travel especially hazardous. New York City has put a travel ban on its roads starting at 9 p.m. on Sunday night."
A winter bomb cyclone will bring blizzard conditions from Maryland through southeastern New England Sunday night into Monday morning. A blizzard is defined as a snowstorm with sustained winds above 35 mph and considerable falling or blowing snow for at least three hours. The storm could produce one to two feet of snow, snowfall rates of 2–3 inches per hour, and coastal wind gusts of 40–70 mph. Visibility can drop below 0.25 mile, making travel hazardous; New York City imposed a road travel ban starting 9 p.m. Sunday. Heavy, wet snow and intense winds can cause power outages by weighing down lines and tree branches.
Read at www.scientificamerican.com
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