(Repeats to widen distribution, no change to text) CHICAGO, June 12 (Reuters) - A violent storm - packing severe thunderstorms, damaging winds and possibly strong tornadoes - is expected to strike the upper Midwest, including the nation's third-largest city of Chicago on Wednesday, the National Weather Service said Wednesday. The service is predicting a "potentially very dangerous situation" with the storm expected to rapidly develop through the afternoon and into the evening and move through eastern Iowa, northern Illinois and Indiana and northwest Ohio. Thunderstorms along a fast-moving squall line that could produce embedded tornadoes and damaging winds of up to 75 miles per hour is expected, according to the weather service. The National Weather Service has issued a hazardous weather outlook for Chicago, which includes the possibility of strong tornadoes, baseball-sized hail and heavy rainfall that could result in flash flooding. Severe storms are also possible for portion of the Mid-Atlantic and Southeast, according to the service. (Reporting By Brendan O'Brien; Editing by Greg McCune and Sofina Mirza-Reid)
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