Unusual Weather

It is very cold today, and the temprature may drops below zerocentidegree. The winter is really comes. When I got the office, took off my raincoat, I was surprised that there was a piece of ice on it. Maybe it was too cold, so that the rain built into the ice block after it dropped on my raincoat. A few minutes ago, there were so many crystal ice dropping down outside, and they beat the window. We can heard the sound of "pi-pi-pa-pa".(How to say it exactly? Dear friends, please help me.) It was a little unnormal. But now we can see the beautiful snowflake flying in the air. That is great! I think it will last for a longer time than last time.