 At 0000 UTC on October 21 , Nadine attained its peak intensity with winds of 60 mph ( 95 km / h ) and a minimum barometric pressure of 999 mbar ( 29 @.@ 5 inHg ) . Around the time of peak intensity , a possible eye @-@ like feature and an impressive outflow were observed on satellite imagery . As a result , the National Hurricane Center noted the possibility , but did not exclusively forecast Nadine to strengthen into a hurricane . However , shortly thereafter , wind shear increased and the storm resembled a frontal wave and appeared to possibly be interacting with the cold front . The cloud pattern then became ragged , while the low @-@ level circulation moved toward the southern edge of the deep convection . By 0000 UTC on October 22 , Nadine transitioned into an extratropical cyclone and merged with a frontal low about 18 hours later . 
