snow

Last night we had the fourth snow of the year here in Oklahoma, for a total of about 5 or 6 inches of snow and winter just started a few days ago. Will someone tell me what is going on? Historically, we have ~2 ice storms and ~2 snowfalls per season. Now I'm not complaining about the lack of ice, but small towns in Oklahoma aren't really equipped for snow removal, so if this is the beginning of a new weather pattern and I need to buy snow tires I wish someone would let me know.