The thermometer at Park Point’s Sky Harbor Airport hit a remarkable 97 degrees Saturday afternoon — and then immediately plummeted to just 64. The 33-degree dip over the course of just 20 minutes was a reverse of what had occurred less than 24 hours earlier, when the harbor went from 68 to 93 degrees over the same timeframe. The Duluth harbor’s rare reading in the upper 90s came at 3:15 p.m. as conditions were calm after a scorching afternoon with a mild western wind. But by 3:35 p.m., Mother Nature’s natural air conditioning had kicked in, sending a 20 mph east wind off the lake. By 5:15 p.m., the temperature had dropped a full 40 degrees, to just 57.
Superior’s Richard I. Bong Airport saw a similar plummet shortly after 3 p.m., with its thermometer dipping from 95 to 69.