High Quality Content by WIKIPEDIA articles! The Great Appalachian Storm of November 1950 was a large extratropical cyclone which moved through the Eastern United States, causing significant winds, heavy rains east of the Appalachians, and blizzard conditions along the western slopes of the mountain chain. Power was out to more than 1,000,000 customers during this event. In all, the storm impacted 22 states, killing 353, and creating US$66.7 million in damage (1950 dollars). At the time, U.S. insurance companies paid more money out to their policy holders for damage resulting from this cyclone than for any other previous storm or hurricane.