Isn't it obvious? The government is seeding our atmosphere to bend at their will!!!!!
Just kidding, I do know what you mean though. Here are a couple articles from 5 years difference [[both from MLive.)
https://www.mlive.com/weather/index....s_down_ac.html [[2018)
https://www.mlive.com/weather/index....en_amazin.html [[2013)
These are more observatory than anything, still decent info. I would look more into NOAA if I were you.