I grew up in Tornado Alley, so have enjoyed the "how windy was it?"
discussion and thought you might like to see a New Mexico strength
If you really don't want something to blow into the next state, a buried
tie-down works much better than a simple stake. No, I didn't dig up
the railroad tie to get a photo of the part underground-- ya gotta trust me
on this one. The tie is buried a couple of feet deep with a
metal cable wrapped around it, then passed through the bottom eye bolt, and
tightened with a clamp. The dirt fill (thoroughly tamped) leaves only the
adjustable eyebolt above ground.
I was much, much younger when we constructed this one -- I'll just let
you guess how long it has held up.