A patch of rough weather over the Pacific Ocean has forced two veteran pilots trying to break a pair of records to delay the launch of their helium-filled balloon.

Albuquerque pilot Troy Bradley and colleague Leonid Tiukhtyaev of Russia planned to lift off from Saga, Japan.

Their team at mission control in Albuquerque said Thursday the pilots do not want to compromise their safety and are watching for a break in the weather.

The pilots are aiming for the shores of North America, an attempt that puts them on course to break the ballooning distance record of 5,208 miles.

They're also looking to break the flight-duration record set in 1978 when Ben Abruzzo, Maxie Anderson and Larry Newman made the first trans-Atlantic balloon flight.