Marcus "Landon" Aydlett

Preliminary data show all four islands had typhoon-force winds.

Rota residents are advised to move to interior rooms of shelters and to stay away from windows.

At 1 a.m. Monday, the system was located at 13.7 north latitude and 146.9 east longitude, about 134 miles east of Andersen Air Force Base. It was packing winds of 180 mph and gusts of 215 mph as it approached the island chain.

Forecasters are advising residents to have supplies in a safe place where they can stay from sundown Sunday to sunrise Tuesday.

Guam, Rota, Tinian and Saipan were placed under a typhoon watch at 2 p.m. Friday, meaning typhoon conditions were possible within 48 hours.