It actually snowed in Houston. On Christmas Eve, a few times during the day I could see sleet falling from the sky. With the temperature never getting above the mid-30's, the ground was too warm for the sleet to stick, but the little balls of snow did manage to survive on plastic and metal items in our yard: patio chairs and a child's slide.
This was the first time I had ever seen anything other than rain fall from the Houston skies.
That evening, though, it started actually snowing steadily. The snow managed to stick on the grass and plants; the roads were just wet, although some overpasses did manage to ice over and were closed. By the time we returned home from the church service, our car had about half an inch on it, and the yard was lightly dusted with snow. The girls had a fun time among the snowflakes, having almost as much fun as I did.
The snow stopped that evening, and mostly melted overnight, although small puddles of snow could be seen in shady areas of roofs into much of the day. It was still a remarkable experience.