"From Sunday, April 3, through the following week, most of, if not all, days will bring below-average temperatures from the northern Plains to the mid-Atlantic coast," Lundberg said. "We expect nighttime temperatures to drop to freezing as far south as the Tennessee Valley."
For a few days during the first week of April, highs could be in the 40s in New York City and perhaps in the 60s in New Orleans. It is possible that before the arctic air leaves the U.S., it pivots eastward across New England and to the Northeast coast for a couple of days.
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After all this is (SPRING THAW) 
