Six Flags officials announced that Hurricane Harbor in Oklahoma City will reopen later this month with reduced attendance and by making reservations online.Hurricane Harbor will reopen in a preview mode June 19-21 for members and season pass holders only. After the initial reopening phase, the water park will gradually increase attendance levels through the end of the month, according to a news release. The news release states that Hurricane Harbor will implement new safety measures and hygiene protocols, including new advanced technology systems to protect guests and employees.Guests who want to make a reservation can do so online. Six Flags officials said the reservation process only takes a few minutes.The general public will be able to make online reservations started at 6 p.m. Friday.