Hyper Mini Black Hole Thomas formed on October 10, 1985 from a very well defined tropical wave that came off from the African coast on October 9, 1985. It quickly intensified into a hypercane, two hours later after becoming a tropical storm on October 10, due to extremely high water temperatures. Later, it hit the US on October 14 as a 635 mph hypercane, being two and a half times the size of the US, covering the entire country. It brought 8 feet of rain to the country, making over $900 billion (1985 USD), followed by 200 foot waves crossing the International Date Line on November 16.