Source: Sophia Rosenbaum / NBC News
A storm system brewing over the Midwest threatened tens of millions of people Wednesday with heavy rain, hail and perhaps even a derecho — a rare, explosive wind pattern that forecasters compare to the landfall of a hurricane.
Chicago, Detroit and Cleveland were all in the threat zone, with Pittsburgh, Baltimore and Washington at risk of severe storms on Thursday.
“This is a particularly dangerous situation,” the National Weather Service said in an alert.
The weather service issued a tornado watch for parts of Iowa, Illinois, Minnesota and Wisconsin. Besides tornadoes, it warned of 80-mph wind and 3-inch hail.
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