Three balloons launched from Sioux Falls.
Looks like they could be Google Loon (or whatever it’s called nowdays) balloons based on the altitude.
Bet I picked them up here, noticed a long horn down that way on my map earlier this week that reached right to Sioux Falls. Thought it might be anomalous propagation but maybe not!
edit: admin; hope it’s ok to include a link to another service, delete if not.