2017 Data Added

Tornado data for 2017 has been added to the Tornado History Project. 1428 tornadoes were confirmed in 2017, a substantial increase from the 976 reported in 2016*. In fact, 2017 was the most active year since 2011′s total of 1692.

Combined with revisions the Storm Prediction Center (SPC) has made to some historical tornadoes, the total number of tornadoes in this database now stands at 62517.

* 977 tornadoes were initially reported by the SPC for 2016, but the number was revised in later updates.

2016 Data Added

2016 year data has been added to the Tornado History Project. 977 976* tornadoes were confirmed in 2016, well down from the 1176 reported in 2015.

Many readers have asked why the annual update was delayed this year. The answer is that the Storm Prediction Center (the data source, as noted in the FAQ) released the data later than usual. As usual, the data was added here within a couple weeks of being released.

* 977 tornadoes were initially reported by the SPC for 2016, but the number was revised in later updates.

2015 tornadoes added

The Tornado History Project has added tornadoes for the 2015 calendar year. Thanks again to the Storm Prediction Center for compiling and publishing the raw data.

There were 1176 confirmed tornadoes in 2015, which reverses a downward trend that spanned from 2012 with 940 tornadoes to 2014 with 886 tornadoes.

The total number of tornadoes mapped on this site (covering the period 1950-2015) now exceeds 60,000.

Tornado data updated

Due to improvements in the Storm Prediction Center source data, the Tornado History Project has updated its database accordingly. Among the changes:

  • The total number of tornadoes rose from 58940 to 58944.
  • The number of tornadoes with unknown Fujita ratings has dropped from 1864 to 57.

In addition, a number of data bugs have been fixed.

2014 tornadoes added

On May 7, 2015 the Tornado History Project added tornadoes for the 2014 calendar year. Thanks again to the Storm Prediction Center for compiling and publishing the raw data.

There were 887 886 confirmed tornadoes in 2014, which continues a downward trend started in 2012 when 940 tornadoes were confirmed, down from 1691 1692 tornadoes in 2011. 2013 saw 906 907 tornadoes.

The total number of tornadoes mapped on this site (covering the period 1950-2014) is now just short of 59,000.

Note: Some totals have been updated since this was originally posted.

2013 tornado data added

Good news! On the evening of April 5, 2014 the Tornado History Project added tornadoes for the 2013 calendar year. As always, many thanks to the Storm Prediction Center for compiling and publishing the raw data.

There were 906 confirmed tornadoes in 2013, which is the lowest annual number since 856 tornadoes in 1989. The total number of tornadoes mapped on this site (covering the period 1950-2013) now exceeds 58,000.

As with prior SPC updates, there are also changes to the previously published data (errors are fixed, etc…) However, this year’s update includes an usually large (even more than last year) number of changes that will likely alter the total tornado counts in many years. Updates will be announced here as those changes are incorporated.

2012 data added

Though this announcement is a little late, effective April 15, 2013 the Tornado History Project added tornado data for 2012*. There were 940 confirmed tornadoes last year, which is the lowest annual number since 2002 registered 932 tornadoes. The total number of tornadoes mapped on this site (covering the period 1950-2012) now stands at 57,154.

There were also a relatively large number of changes to tornadoes in prior years, but unlike similar updates in the past, a itemized list will not be given. Instead, if you have previously downloaded data, simply re-download to get the most up to date information.

* Raw data has been provided by the Storm Prediction Center (SPC).

Another data update

As usual, when the SPC edits or adds data to their historical tornado data, the changes are carried over to the Tornado History Project. Here is a summary of recent changes:

Data updates – part 2

As explained in Data updates – part 1, the SPC periodically updates their historical tornado file, and when they do, the Tornado History Project carries those changes over. This is part 2 of 2 of a detailed list of those changes:

Data updates – part 1

As noted in an earlier post, the SPC recently made changes to the pre-2011 historical files. Here’s a list so far, covering the period from 1950-2004. All the changes noted are already live on this site. There will be a future article for the 2005-2010 changes.
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