e7011e1649c0edc16ff0d7c33ca27f73Here we go again. On the heels of a January and February filled with vicious, snarling storms, the first March wave of arctic air pushing eastward has prompted National Weather Service warnings, watches, and advisories for more than 90 million people. Snow is threatening to add to the already record-high accumulations in cities across the Midwest, Southeast and Northeast. The winter-weary Washington area is awaiting a dangerous tenth of an inch of ice, topped by 8 to 12 inches of snow. The precipitation means more misery for travelers, and the airlines that carry them. As of 4:30 p.m. ET Sunday, flightaware.com reported close to 1,800 canceled flights and some 4,400 flight delays within, into or out of the United States. Inclement weather around the Dallas Fort Worth airport was causing the greatest inconveniences. This storm is a coast-to-coast event. It started as a low pressure system dumping rain on California, then proceeded east in two prongs. As the northern prong of the system has cascaded across the country, it’s delivered dangerous, even deadly, weather to places unfazed by typical winters. More