Tornado Index # 20070823.26.4

 
 
 

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Note: Approximate path data is not available for this tornado.

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 #
2007-08-2314:01:00 31002000.2$0.15$0.02543.45 / -84.9843.45 / -84.98903
Affected StatesAffected Counties
Michigan Montcalm
User Comments   (1)      
General Comment
2013-12-14 14:55:04
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ninbody
Posts:1
Rank: F0

i was working for home township fire department at the time of this storm, my partner and i were on an ems call near the corner of holland rd. and m-46. the patient was watching television and we heard the tornado warning go out. as soon as the ambulance left with the patient, my partner and i went outside and to the north, approximately 1 mile distant there was a well defined funnel cloud heading east-north-east. we jumped into our truck and began pursuing it, radioing our reports to dispatch. from our vantage point behind it, it appeared to be heading for the north side of the village of edmore. we followed it through town (thankfully it had not touched down yet) and turned north onto deja rd. the area is heavily wooded and our line of sight was minimal. upon reaching yankee rd, we regained sight of it again, it was above us and north of us less than a quarter mile. while on yankee rd. (which is gravel) we were hit by a very strong crosswind which nearly blew our heavy rescue truck off the road. we stopped and waited for the wind to cease as there was a good deal of vegetation, dirt and rain blown onto the windshield limiting our vision. we had no idea the location of the funnel. the funnel had touched down in the fields to the north of us and damaged or destroyed farm pivots and nearly pushed one of our fire engines that had a crew storm spotting at the corner of cutler and vickeryville off the road, i believe they said the fire engine was actually spun part of the way around in the road by the tornado. we met that crew at the corner of vickeryville and yankee and related our experiences, having lost sight of the tornado into the woods east of vickeryville rd. seems like a long story for a fairly unremarkable tornado, but i was 24 at the time and it was the first actual tornado i had ever seen and the closest i had ever been to one. as i was driving, i couldn't get any pictures unfortunately.

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