Just days after near-record warmth in some areas, a storm riding a sudden change in the weather pattern will end up bringing accumulating snow and triggering travel disruptions along a 2,000-mile-long swath from the southern Plains and parts of the Mississippi and Ohio valleys to the central Appalachians, the upper part of the mid-Atlantic and southern New England, AccuWeather meteorologists warn. This will be quite a reality check and shake-up for millions of people who were recently out enjoyi