Leaf Blower in the Wind

Leaf blowers are used to clean pathways, from leaves, gravel, dirt, and other materials that creates an unclean path for pedestrians. Tonight at 10 pm my roommates and I went to walmart, we noticed that it was really windy, I then checked to see how strong the wind was and it said 34MPH wind. As we walked out of walmart we see a worker leaf blowing the entrance to the store.  This didn't make sense and still doesn't. Why would you be leaf blowing when the wind can either do the work or make it harder, because the wind can blow the leafs and gravel back to the entrance.  It just seems like a waste of time for the worker, and if it were me I would do it when there isn't wind or just let the wind blow everything.