New Jersey, Delaware and New York were under a blizzard warning Monday, meaning visibility could be reduced to less than a quarter mile.
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Blizzard warnings were still in effect Thursday afternoon across northeast Wyoming and western South Dakota as an intense low pressure system pressed sluggishly across the Plains.
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As temperatures surged into the 60s Friday on strong winds from the Southwest, a seemingly incongruous blizzard warning was issued for parts of northern Montana.
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Blizzard warnings were posted across eastern Colorado as the combination of low visibility, low temperatures and strong winds met the criteria for this type of storm.
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Winter Storm Warnings are issued when winds are less than 35mph; if the storm has winds above this wind speed, it becomes a blizzard warning.
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Blizzard warnings and storm surge warnings were posted as winds were sustained more than 60 80 km ( 40 50 mi ), out of the North.
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A blizzard warning for lower elevations across the plains of western South Dakota called for 8 to 16 inches of snow and north wind blowing at 25 to 40 mph.
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Blizzard warnings were posted elsewhere in the region, with 20 inches of snow possible by Tuesday morning in northern Indiana and southwestern Michigan, the National Weather Service said.
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The fact of the high winds caused the blizzard warnings to be issued by the Mount Holly, New Jersey ( Philadelphia, PA area ) National Weather Service officials.
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In Maine, where the weather service issued a blizzard warning, forecasters expected wind speeds of 30 mph to 40 mph 48 kph to 64 kph ) and limited visibility.
