The 13th consecutive Polar Plunge organized by the Warren County Sheriff’s Office to raise money for Special Olympics Iowa is tomorrow morning. Teams of ten will dress up in costumes and jump into Lake Ahquabi in Indianola, with prizes given out for best individual and team costume. Registration for the event will be taken from 11-noon at Lake Ahquabi, and costs $75 per entry with a t-shirt and meal included. The plunge begins at noon, with a reception held after at the Warren County Administration Building.