winds that move things...

Hello, I live in Northern USA--I live alone and only have garbage enough to fill 1 bag--usually every two weeks. My question concerns the wind that would be necessary to move a large garbage bag of normal weight. I weigh them down with 1 gallon jugs of water if needed--to insure wind doesnt shift them--and I have been successful in keeping them where they're put--Thank God!!! I thought I would ask if there is a wind level with gusts--above which it would be prudent to just wait till next trip ! Also ground surface must be considered ie sometimes ice and snow are in the area near road pickup as well. Thank you for you generous consideration in what may seem to some a trivial pursuit lol !