Data updates
As you may know, the Tornado History Project uses data from the Storm Prediction Center’s (SPC) historical archive to generate maps and tables. So when the SPC updates their archive with new stats and information, the Tornado History Project incorporates those changes into our database. A quick summary of the recent changes follows:
- 19610721.17.20 – SPC tornado number changed from 516 to 517
- 19730620.22.14 – SPC tornado number changed from 618 to 581
- 19730625.46.12 – SPC tornado number changed from 690 to 691
- 19821224.5.67 – SPC tornado number changed from 1025 to 1026
- 19820517.27.6 – SPC tornado number changed from 410 to 411
- 19950501.72.1 – SPC tornado number changed from 0 to 1340
- 19990408.17.37 – merged with 19990408.17.9
- 19990408.17.9 deleted (merged with 19990408.17.37)
- 19990907.20.63 – SPC tornado number changed from 1183 to 1340
- 19990720.19.56 – merged with 19990720.19.58
- 19990720.19.58 deleted (merged with 19990720.19.56)
- 19990728.39.15 – merged with 19990728.39.16
- 19990728.39.16 deleted (merged with 19990728.39.15)
- 20001031.31.56 – 2nd county added (Custer)
- 20010315.12.9 – 2nd county added (Jackson); damage changed from $1,500,000 to $2,000,000; length changed from 7 to 10; lift-off latitude and longitude changed
- 20010315.12.10 – lift-off latitude and longitude removed
- 20011124.1.18 – merged with 20011124.1.19
- 20011124.1.19 deleted (merged with 20011124.1.18)
- 20021110.39.21 – merged with 20021110.39.22
- 20021110.39.22 deleted (merged with 20021110.39.21)
- 20030508.29.68 – merged with 20030508.29.69
- 20030508.29.69 deleted (merged with 20030508.29.68)
- 20030425.1.14 – merged with 20030425.1.15
- 20030425.1.15 deleted (merged with 20030425.1.14)
- 20060312.17.12 – Morgan and Sangamon county removed (moved to 20060312.17.10)
- 20060312.17.10 – Morgan and Sangamon county added (moved from 20060312.17.12)
- 20070826.38.39 – deleted; merged as state segment into 20070826.38.38
- 20070920.27.19 – deleted; merged as state segment into 20070826.38.38
- 20080522.56.32767 – SPC tornado number changed from 32767 to 1690, Fujita scale changed from 0 to 2, injuries changed from 0 to 1, length changed from 0.01 to 25.13, and width changed from 50 to 100
- 20080711.55.32767 – SPC tornado number changed from 32767 to 1691
- 20080728.46.32767 – SPC tornado number changed from 32767 to 1692
- 20081227.17.1688 – added
- 20081227.48.1689 – added
*Index numbers are generated by the Tornado History Project to uniquely identify tornadoes within the site. The index number is not part of the official SPC data.