None. The most recent tornado to hit Washington D.C. was on September 24, 2001.
In the past 25 years Bloomington-Normal has had 2 tornadoes
too many to count
There were two tornadoes in the state of Washington in 2011.
There were two weak tornadoes in the sate of Washington in 2010.
There have been many over the years. The last one was in April 2016.
Georgia has experienced an estimated 211 tornadoes in the past 5 years (spanning 2007-2011). Data for 2011 is still preliminary.
In 2001 there were two tornadoes in the state of Washington and one in Washington D.C. None of these tornadoes resulted in any deaths.
In the latest five-year period (not counting 2011 as statistics are not finalized) the U.S. experienced 6329 tornadoes.
As of July 2016, tornadoes have killed 1,054 people in the U.S. in the past 10 years. More than half of those deaths occurred in 2011, which was an exceptionally violent year for tornadoes.
In the past 10 years tornadoes at least 1402 people have been killed by tornadoes, including 1089 in the United States.
Although they can last longer most weak tornadoes last less than 5 minutes.
There were 8 tornadoes in California in 2010.