sentences:  Early on February 17, Nancy transitioned into an extratropical cyclone as it entered the area of responsibility of TCWC Wellington.Shortly afterwards, the low was absorbed into the larger circulation of Olaf however it was monitored by TCWC Wellington as a separate system until 1200 UTC on February 18.Already impacted by Cyclone Meena a week earlier, the Cook Islands sustained significant damage from Cyclone Nancy.