Wow, what a catastrophic hurricane Matthew turned out to be. From a tropical storm to a category FIVE in a very short time, with a central pressure unusually high.
From Jeff Masters at Wunderground: https://www.wunderground.com/blog/JeffMasters/comment.html?entrynum=3455
Matthew put on a spectacular and wholly unexpected display of rapid intensification on Friday, strengthening from a tropical storm to a Category 5 hurricane in a remarkably short period of time—just 36 hours. It’s a good thing this unexpected rapid intensification burst did not occur as the hurricane was approaching landfall in a heavily populated area, with a population unprepared for a catastrophic hurricane strike. There have been other storms that have intensified even more rapidly from tropical storm strength to Category 5 than Matthew, though. For comparison, Hurricane Wilma of 2005 and Hurricane Patricia of 2015 accomplished the feat in 24 hours; Hurricane Felix of 2007 did it in 30 hours; Hurricane Rita of 2005 and Hurricane Andrew of 1992 did it in 36 hours; and the Great Labor Day Hurricane of 1935 did so in 42 hours.