Complex sentence: Rita was stronger when it made landfall (minimum pressure at landfall was 937mb compared with the 945mb associated with Audrey); however, Rita's winds were less powerful, as Rita was a category 3 hurricane at landfall with maximum sustained winds of 115 mph.
Split into simpler sentences: Rita was stronger when it made landfall (minimum pressure at landfall was 937mb compared with the 945mb associated with Audrey). However, Rita's winds were less powerful, as Rita was a Category 3 hurricane at landfall with maximum sustained winds of 115 mph.