The question came up on account of remnants of Ike having winds in the category 1 range, so people were calling it a “hurricane.” I knew that wasn’t so, because there is a definitional boundary unrelated to wind speed, but I had to look at the details:
Which leads to:
Tropical Cyclone, which is what a hurricane is.
That leads to the distinction between that and:
Which has a money quote of:
It is important to note that cyclones can become extratropical and still retain winds of hurricane or tropical storm force.
So there you go, a storm is a storm and can have whatever wind speeds it wants, which may be spectacular, but if its energy source is or has become baroclinic, it is no longer a hurricane, and no longer gets a name or as much press.