Former Hurricane Arthur is making a change -- but to what? News; Hurricane Arthur's evolution: What is an extratropical storm? Published: ; Jul. 05, 2014, 9:54 a.m.

Lorenzo has completed its transition into a powerful extratropical cyclone and this will be the last NHC advisory on this system. The center has become exposed on the southwestern edge of the ...

Hurricane Tammy shifted into an extratropical cyclone on Thursday with a path that will keep its large windfield away from Bermuda, according to the National Hurricane Center. As of 5 am. in what ...

An aerial view of an area affected by an extratropical cyclone in Muçum, in Rio Grande do Sul state, Brazil, on Tuesday. Authorities are warning there could be more flooding to come.

Torrential rain and winds caused by an extratropical cyclone have left at least 21 people dead in southern Brazil, officials said Tuesday, warning more flooding may be coming.