Tornado Index # 19670421.17.13

 
 
 

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Disclaimer |?|

Note: This approximate tornado path has been generated from data provided by the NCDC.

The Tornado History Project generates approximate paths through separate historical archives provided by the Storm Prediction Center (SPC) and the National Climatic Data Center (NCDC). Paths generated from the NCDC data are typically more detailed, but neither archive gives exact path information. There are several reasons that paths may be inaccurate:

  • Tornado touchdown and liftoff coordinates were recorded with only 2 digits of decimal precision (i.e. [33.72, -86.15] vs [33.71689, -86.15463]). As a consequence, the observed points on the map may be slightly off from actual. Note that beginning in 2009, up to 4 digits of decimal precision are given.
  • Coordinates have not historically been calculated via GPS (Global Positioning System). Thus, tornado touchdown and liftoff coordinates should be considered as estimates only.
  • Tornadoes may not have been in contact with the ground for the entire path as depicted on the map. Storm damage in any location depicted under the "path" should not be inferred.
  • Although paths are drawn as straight lines between any two sets of coordinates, the tornado may have "zigzagged" in some way.
  • Although paths are drawn as uniform thin lines on the map, it is likely that the tornado changed size over its lifetime. Damage in any location depicted under (or not under) the "path" should not be inferred.

Even with the above in mind, the data is the best available. If you see a path that is depicted incorrectly, please post a comment in the tornado forum indicating why you belive the path to be incorrect.

Paths generated from NCDC data are typically more detailed due to the way coordinates are listed in each archive:

  • SPC database - A maximum of 2 coordinates (touchdown and liftoff) is given for each tornado, or each state segment of a tornado if it is a multi-state tornado. Thus the vast majority of paths are depicted as simple straight lines.
  • NCDC database - Some tornadoes have mutliple sets of coordinates within any state, generally corresponding to entry and exit points by county. Thus, since more coordinates have been used to draw the path, the depicted path should be more accurate. Having said that, most tornadoes do not have additional path data in the NCDC archive. When they do, paths are drawn from the NCDC data.

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Statistics   Definitions |?|

The following statistics and definitions are derived from the Storm Prediction Center (SPC) historical tornado archive. The Tornado History Project can not guarantee the accuracy of the underlying data within the SPC historical tornado archive. However, the data as presented here is guaranteed to match the SPC data, except where noted.

Some definitions will not be given since they are obvious (i.e. "Date", "Time", etc...)
Special Note: This site uses a unique index number to identify each tornado. This index number is not a part of the official historical tornado archive.

E (Error) (tornado search table only) - A yellow box indicates that the tornado record contains a suspected error. A red box indicates that the tornado record contains an error and has been modified from the official source. Hover over the box for the error text.
Map/Forum (tornado search table only) - Clickable icons for further content related to a tornado.
State - The state or states affected by a tornado.
Fujita - The Fujita scale is an attempt to classify damage from a tornado. F0 being the least damaging, F5 the most. For 2007 and beyond, the Enhanced Fujita (EF) is given.
Fat. - The number of fatalities attributed to the tornado.
Inj. - The number of injuries attributed to the tornado.
Width - Width in yards. It is unclear if this indicates a maximum width or mean width.
Length - Length of tornado path in miles. Note the entire track length is not necessarily all on the ground (some tornadoes "hop and skip".)
Damage - Prior to 1996, this is a range by dollar amount. For 1996 and later, actual damage estimates are in millions.
Crop Loss - Added in 2007. Given in millions of dollars.
Lat/Lon - Contains two sets of coordinates:

  • Touchdown Latitude/Longitude - For single state tornadoes, and the overall record for multi-state tornadoes, the approximate touchdown location in decimal degrees. For the state specific records of multi-state tornadoes, entry point into the state in decimal degrees.
  • Liftoff Latitude/Longitude - For single state tornadoes, and the overall record for multi-state tornadoes, the approximate liftoff location in decimal degrees. For the state specific records of multi-state tornadoes, the exit or lift-off point from the state in decimal degrees.

St. #. - The state tornado number assigned to the tornado for that specific state for that specific year. Generally, state tornado numbers were assigned in the order the tornado occurred, but that is not always the case.
SPC # - The tornado number as assigned by the SPC. Tornado numbers are not unique and reset each year. Generally, tornado numbers were assigned in the order the tornado occurred, but that is not always the case.

Tornado Summary

Date (y/m/d)TimeFujitaFatalitiesInjuriesWidthLengthDamageCrop LossTouchdown Lat/LonLiftoff Lat/LonSPC #State #
1967-04-2115:50:00 3424450120025.5$50K-$500K-42.22 / -88.9242.35 / -88.43174
Affected StatesAffected Counties
Illinois Boone, McHenry
User Comments   (5)      
General Comment
2007-03-23 13:42:28
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Steve Steinke
Posts:1
Rank: F0

As an eyewitness to this tornado, and as one whose fascination for weather has followed its wake ever since, I appreciate this database and all the work that has gone into it. Keep up the good work.

I remember specifically, though, that damage was listed in excess of $20 million dollars (in 1967 dollars), not the $50 to $500k that is listed. The map and other listed numerical data, including the number of deaths and injuries is correct. I will do my best to add some links for further refernce when I locate them.

General Comment
2007-04-12 08:41:08
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Chris Soprych
Posts:1
Rank: F0

Steve, as you know the 40th anniversary of the Belvidere tornado is upon us. I'm part of a team of journalists at the Rockford Register Star that are working on a special project that is set to publish that week. It will have a significant multimedia element in addition to the print coverage. I would like to talk with you about your account, if possible. Could you please shoot me an e-mail at Csoprych@rrstar.com.

General Comment
2007-04-19 19:29:29
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Rachael from Belvedere
Posts:1
Rank: F0

I was not in the time if the tornado and i have never been in a tornado but i could not imagine what these people were thinking or doing when this happened. I would not have been able to handle it. I give all of the people who lived through it respect just for being safe and getting through something so horrible! I also mourn for the ones that died...i couldnt even imagine the sadness that over came Belvidere at this horrific time and i have much respect for all of the people who went through it!

sincerely, RACHAEL

General Comment  Tornado Photo  Tornado Video
2007-04-20 08:17:39
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Chris Soprych
Posts:1
Rank: F0

The Rockford Register Star published a several page report on the Belvidere tornado in the Friday, April 20, 2007 edition. It is also available online. This was a labor of love for us and we hope that it serves people of Belvidere and victims of other tornados.



Chris Soprych

Rockford Register Star



It has photos, videos, interactive graphics and an opportunity for survivors to post their experiences.



Photos - http://www.rrstar.com/multimedia/x1295925961

Video - http://www.rrstar.com/multimedia/x257798875

 

Edited on 2008-07-15 18:10:32 by JoshLietz

General Comment
2007-06-20 09:57:12
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Kimberly McGuigan
Posts:1
Rank: F0

Thanks for this site. I remember this tornado well. I was being taken home from Rockford to Poplar Grove with my mom. I had just turned 6. I always said I saw it out of the right passenger window of the car. The path shown confirms my memories. I will also always remember what the air felt like that day. Very hard to describe, but unforgetable.
sincerely, Kimberly

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