Willmar High School Cool School Register Tuesday, April 30 Plunges begin at 1 PM (subject to change) Plungester event Willmar High School Willmar High School, 2701 30th St NE, Willmar, MN 56201 more details WILLMAR HIGH SCHOOL COOL SCHOOL PLUNGE The Cool School Polar Plunge is at Willmar High School for the second year!