NEW : `` It 's been a long and rough 3 a.m. , '' storm chaser says . Ralitsa Vassileva crosses over Okinawa . It is the strongest typhoon in the region since 1956 . Okinawa cloud field is More than 400,000 times the length of Typhoon Bolaven 's .
NEW : `` It 's been a long and rough night , '' storm chaser says . Bolaven crosses over Okinawa . It is the strongest typhoon in the region since 1956 . Typhoon Bolaven 's cloud field is about 20 times the length of Okinawa .