Great Lake Jumper keeps jumping into Lake Michigan despite extreme cold

Dan O'Connor, known as the 'Great Lake Jumper,' has entered Lake Michigan every morning for about five and a half years and has logged 2,049 jumps. Medical professionals reported that extreme cold can cause frostbite on exposed skin in as little as 10 minutes.

Dan O'Connor, called the "Great Lake Jumper," takes a daily dip in Lake Michigan at Montrose Harbor even when the Chicago area is under Extreme Cold Warnings. He has kept the routine for about five and a half years. Local reporting described a recent subzero Friday when O'Connor and three others entered the lake. Medical professionals noted frostbite can develop on exposed skin in as little as 10 minutes. Key facts: - Dan O'Connor has jumped at Montrose Harbor every morning for about five and a half years and has recorded 2,049 jumps. - On the cited Friday, four people entered the lake while the Chicago area was under an Extreme Cold Warning. - O'Connor said a recent video of his jump received about 200,000 views within two hours, drawing local attention. - Medical professionals reported that the temperatures could cause frostbite on exposed skin in as little as 10 minutes. Summary: The routine has made O'Connor a visible local figure and attracted social media attention. He said he plans to continue his daily jumps until he cannot. Official public-safety steps related to these personal activities were not stated.