[Ingtar]

Kat was category 4 windspeed and cat 5 pressure on landfall in MS. She was category 5 for both at landfall in South Louisiana. At least that is what I have read.

[Strategerist]

Kat was category 4 windspeed and cat 5 pressure on landfall in MS. She was category 5 for both at landfall in South Louisiana. At least that is what I have read.

There's no such thing as "Category 5 for pressure" as pressure is irrelevant to giving a storm a Saffir-Simpson category. The pressures ranges you see given for S-S categories on charts are merely additional useful info.

And it was a Category 4 at first landfall in Louisiana.

[fishntex]

Strategerist is right on. In general when the pressure is where it is now the hurricane is a cat 5 but not as a rule.