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Severe Thunderstorm Watch number 688 is now in effect for ALL of south central lower Michigan until 1:00AM EDT. Extremely powerful storms will continue moving this way, and developing with main threats being damaging winds reaching hurricane force (74 mph) or greater, hail up to golf ball size, flooding torrential rains, and an isolated tornado all possible. Stay tuned everybody as these storms are going to explode rapidly with little or no warning due to the extreme instability within the atmosphere currently.