Those "things" are called snow rollers. It is a very rare weather phenomena that occurs when the conditions are just right. Google "snow rollers" and it will give a whole explanation. There were thousands around our house and fields too. Thanks for posting the pictures Joe.
The snow rollers seem to be pretty much all over western PA. Some large pasture fields I have seen have literally thousands of them. They range in size from a fist to a 5-gallon bucket. The bigger ones are usually hollow, but regardless of the diameter, they all seem to be about 12"-14" long. It is weird that the conditions were right for them over such a wide area. My nephew was loading a log truck at 0330 Tuesday AM and saw a field of them being made. He said they appeared in the space of 3 or 4 minutes, not over a long period. Maybe alien intervention, and I'm not talking Mexicans here.