Somewhere, weepy Bill McKibben is weeping and Al Gore is raging, because they won’t be able to say “2012, the hottest year ever, caused more tornadoes” So much for “dirty weather” Heh.
The NOAA Storm Prediction Center just updated their 2012 tornado count graph to the end of November. While the year is not over, the average number of 25 tornadoes expected in December (or lower if the below normal trend holds) would suggest that 2012 will end with well below normal tornado activity.
NOAA SPC’s Greg Carbin writes:
After a busy start, tornado events in the U.S. in 2012 have dropped well below the expected norm. The preliminary total of 886 tornadoes through 30 November 2012 is nearly 400 tornadoes below what might be expected in a “normal” year.
The chart above shows that at this time in 2011, the annual running total was about 400 tornadoes *above* normal; a mirror opposite of 2012.
The chart is meant to depict the dramatic variability that can occur in tornado numbers from one year to the next. On average about 25 tornadoes occur during the month of December based on data from the last 30 years. Click for full image or see the detailed written summary to date below.
Information about the tornadoes of 2012 (to-date) and comparison with other years and events. (Click image for pdf version.)
Footnote: be sure to help in the fun to give Al Gore get his hockey stick courtesy of WUWT readers by watching his silly severe weather propaganda video here.