I was awoken this morning by the sound of rushing water. The pipe leading from the roof to the reservoir had so much water surging through it that the elbow fitting on the bottom had been knocked loose. We were worried that the water might be too much for the courtyard drain. We were also in need of some water in the reservoir. I had to put on a pair of jeans and go put the elbow back on.

When I was crouched there with water up to my ankles and water dropping onto my back I noticed that some of the water was kinda grainy and frozen-like. I am not that good with physics. Can anyone tell me if rain mixed with hail flows with more force than the same volume of water? I had a difficult time getting the elbow to stay on that pipe and it had stayed put through some pretty hard rain in the autumn. This picture is from back in the fall.