Curtain of Snow

I was sitting and relaxing at my favorite Starbucks when I thought I saw snow on the backs of a few cars in the parking lot. I mentioned this to a friend I was talking with on the phone at the time. The conversation continued and then a curtain of snow fell down with a defined bottom and sides, plain as day. I walked up to the cars with "snow" on their backs. Yup. It was real snow.