Well that's easy. The meteorologists can remember that category number = 10 v' / c, where v' is the maximum median windspeed over a one hundred acre convex regi

Well that's easy. The meteorologists can remember that category number = 10 v' / c, where v' is the maximum median windspeed over a one hundred acre convex region, and all anyone else needs to know is that every storm is cat 0.