No, Hurricanes form over tropical ocean water and weaken rapidly once they hit land. By the time the remnants of a hurricane might reach Detroit, they would be no stronger than any other storm that might go through.
No, Hurricane Opal was not the strongest hurricane by any means. Opal was a strong category 4 with 150 mph winds. The strongest hurricane on record was Hurricane Camille with winds of 190-200 mph.
I hurrican becomes a hurricane when the magnetic force acts upon it and it starts spinning. A hurrican becomes stronger when there is warm water so that is why it dies down when it hits the land....
There are hundreds of unnamed hurricanes in each basin. You're going to have to be more specific with what year you are looking for and even then, what month and day was the storm active