Input (grade 13): Katrina struck the peninsula with 80 mph (130 km/h) winds, and had a well-defined eye on NEXRAD weather radar, which remained intact throughout its passage over Florida.
Output (grade 12): Katrina struck the peninsula with 80 mph (130 km/h) winds, and had a well-defined eye on Doppler radar, which managed to stay undisturbed throughout its passage over Florida.