Yes, add forward speed to the windspeed on the dirty side.
So it’s add forward speed to dirty side only?I didn’t know that.
Outer eyewall clearly contracting - a very rapid ERC going on, apparently, and in time to be completed prior to landfall. Plus, the eye is now starting its pass over the Gulf Stream, not good. It is getting its act together right before landfall, and a strengthening hurricane is much worse at landfall than a weakening one.