Highs in the mid-80s are predicted Friday when Edmonds’ Yost Pool hosts its annual belly flop competition. The event, which starts at 6 p.m., is divided into three age groups: under 10, 11 to 14, and 15 and up.. You can register the day of the event, and the $5 entry fee includes admission to the public swim following the event. Yost Pool is located at 9535 Bowdoin Way.