As you can see, the total number of Alabama tornadoes so far in 2013 compares quite well with the climatological 10 yr (2001-2010) average. However, it is far below the most recent 10 yr (2003-2012) average. Why is that? Well, the reason for this is the fact that the more recent average includes 2011, which has skewed the numbers toward the higher end of the spectrum since it was by far an anomalous year for number of tornadoes. Now it becomes obvious why the 2013 totals are so much lower than the most recent 10 yr average.
All in all, it may seem as though we've had a rather quiet start to 2013, but in actuality, we are near normal for number of tornadoes. The tornado outbreaks of April 2011 are what stand out in most people's minds, but they were not the norm. Therefore, the current climatological 10 yr average, which does not include 2011, are much more representative of the normal tornado occurrances here in Alabama.
For more information on Alabama tornado statistics and/or specific Alabama tornadoes, please visit the Alabama Tornado Database.