Reduced my hives down and set up for winter a couple of weeks ago. Everything looked good and settled. I was cleaning up the barnyard for a nice winter's nap today with winds gusting to 20 mph. Next thing I knew I was in a cloud of bees that were having a tough time holding the swarm together. Eventually a large softball sized swarm settled and was hived. I probably will do a pinch and combine this week but was wondering if anybody else has had this late of a swarm or an explanation. Goldenrod has been dead for about 2 weeks here.