By the way, I'll bet a gallon of gasoline that Katrina's landfall will eventually be upgraded to that of a Cat 5 system -- by the pressure alone, it was stronger than Andrew at landfall... took a few years for the NHC to re-evaluate Andrew.
000 URNT12 KNHC 212358Z VORTEX DATA MESSAGE A. 21/2313Z B. 24 DEG 31 MIN N 86 DEG 46 MIN W C. 700 MB 22472 M D. 80 KT E. 213 DEG 24 NM F. 305 DEG 142 KT G. 198 DEG 11NM H. 899 MB I. 8 C/ 3053 M J. 28 C/ 3042 M K. 01 C/ NA L. CLOSED WALL M. C20 N. 12345/7 O. .02/1 NM P. NOAA3 WX18A RITA OB 23 MAX FL WIND 161 KT NE QUAD 1932Z
I'd bet you considerable money it isn't. The SOLE measure of a storms Saffir-Simpson category is sustained wind speed.
And pressure has nothing to do with the wind speed of a storm. It's the pressure DIFFERENCE between the region outside of the storm, and the storm itself. Andrew was in an environment surrounded by a higher background pressure.