Tag Archives: Tornado statistics

2009 tornado season deadly but below average thus far

Thus far the 2009 tornado season has been quiet compared to years past.  (AP Photo)
Thus far the 2009 tornado season has been quiet compared to years past.

The severe weather season has started in earnest now and last week’s deaths of five people from tornadoes highlight the danger this time of year brings.  Thus far however, 2009 is below the three year average not only in the total number of tornadoes reported but also in the number of tornado related deaths.

In terms of the number of tornado reports, through yesterday there have been 303 preliminary reports in 2009.  Over the last three years the United States has averaged 391 per year through April 13th.  That means that 2009 is thus far 23% below average.

Tornado Reports by Year
Through April 13th
2009
2008
2007
2006
3yr Avg
303
494
286
392
391

 It is important to note that all of those counts are based on preliminary tornado reports.  The actual number of tornadoes that occurred typically is reduced by about 15 percent as duplicate reports are eliminated.  Nevertheless, this does show 2009 is running well below average. 

In terms of fatalities caused by twisters, there have been 14 thus far this year.  This too is below the three year average of 54 per year through April 13th.  That is a large 75% reduction which is notable and something certainly to be thankful for.

Tornado Fatalities by Year
Through April 13th
2009
2008
2007
2006
3yr Avg
14
70
52
50
57

 It is important to note that while this year shows promise for being a less deadly and less destructive tornado season, the season is far from over.  May and June are typically the most active months of the season and one large outbreak could radically change these numbers.

[nggallery id=3]

 

Tornado Reports for 2009