Katrina made its second landfall on August 29 as a Category 4 hurricane with sustained winds of 125 mph ( 205 km\/h ) near st. bernard , Louisiana . Katrina made its second landfall at 6:10 a.m. CDT on Monday , August 29 as a Category 3 hurricane with sustained winds of 125 mph ( 205 km\/h ) near Buras-Triumph , Louisiana .