Yup, it is pretty cool. I experienced it once too. I was put in the yard just as the wind picked up for a storm. All of a sudden there was a river of bees streaming into the hives. About a minute after the influx stopped a major storm hit. I wondered if they were sensitive to the pressure change or if they were out in the direction the storm was coming from and knew from it already storming there it was time to go home.