do a search online for cloud seeding and weather modification in Minnesota or Minneapolis area, I forgot which it was, but they were "looking" at the times you have.
Not for the faint of heart in terms or equipment you fly or weather conditions you fly in, but it's multi time. Good Luck and to add to the "get your CFI" note, LOTS of schools are offering CFI's sign on bonuses and other assistance perks these days.