Incredible photographs show a gray wall sweeping across Phoenix as an enormous, 50-mile-wide dust storm blew through the city late on Tuesday. Winds reached 60 miles per hour, severe thunderstorm warnings were issued, and visibility was so reduced that flights to Phoenix from Los Angeles and Las Vegas were canceled until 9 p.m. Tuesday. The high winds are expected to continue for several days, although the storm threat will shrink.
Gallery: Photos of the Phoenix Dust Storm
Watch Video of the Dust Storm