eyewall replacement cycle
... that as Hurricane Katrina approached New Orleans it underwent an eyewall replacement cycle that caused it to decrease in intensity but increase in diameter?
... that as <a href="./Hurricane_Katrina" id="mwBJs" rel="mw:WikiLink" title="Hurricane Katrina">Hurricane Katrina</a> approached <a href="./New_Orleans" id="mwBJw" rel="mw:WikiLink" title="New Orleans">New Orleans</a> it underwent an <b id="mwBJ0"><a href="./Eyewall_replacement_cycle" id="mwBJ4" rel="mw:WikiLink" title="Eyewall replacement cycle">eyewall replacement cycle</a></b> that caused it to decrease in intensity but increase in diameter?