This may or may not be odd, i went to the hives today to do my weekly check up, when I got out of the truck the hum was extremely loud, i park about 20 yards from the hives. Looking at the hives the was a lot of bees flying and on the sides of the boxes. I walked back to the truck to get my smoker started and put on my veil and hundreds of bees in the air approximately 30 yards from the hives. I went on and got everything ready and went in to the hives, most of the bees had settled down and there were very few out front of the boxes now. When I went back to the truck all the bees that were in the air had gone, not sure if they were swarming or what just appeared odd to me. It has been raining here and very overcast on and off for the last 24 to 48 hours and it is expected to continue into tomorrow. Any ideas on what was going on. I looked around and could not find a swarm anywhere.