 Although Felice officially dissipated at 1200 UTC on September 17 , its remnants retained a structure very similar to that of a healthy tropical cyclone , as depicted by radar imagery from the National Severe Storms Laboratory in Norman . Distinct rainbands harbored a noticeable eye feature , which passed about 90 mi ( 140 km ) southeast of Norman . Two aircraft flew into the area to collect data on the unique storm ; notably , they found the system still had a warm core compared to its environment . Throughout the day on September 17 , the remnants of Felice continued to weaken . The residual surface low recurved toward the east @-@ northeast over Oklahoma and Arkansas before fully dissipating after September 19 . 
