Following a small plane in sky when I noticed object .

I was waiting at a railroad crossing to begin my work. My co-workers left the job site I was looking at a small plane flying towards a storm clouds when I noticed a bright long shape object going in and out of the storm clouds. So I took a couple of pictures I was trying to record on my phone but object kept moving in and out of cloud. So I was trying to focus closer on object to see what it was. I was able to take 3 picture of object before it disappeared into clouds.