August 24th Tornado Outbreak - Updated with Radar Images

Storm Survey Results

August 24, 2007 Severe Weather/Tornado Outbreak

Four tornadoes moved through portions of Southeast Michigan on August 24. In addition, there were widespread reports of severe thunderstorm wind gusts producing downed trees, limbs, and power lines. The hardest hit areas with respect to severe thunderstorm winds included areas around Flint, Lapeer, St. Clair, Chelsea, Monore, and many locations in Livingston, Oakland, Macomb, Wayne and Lenawee Counties. Only one minor injury was reported as a result of all of the severe weather on August 24. One person suffered cuts from flying glass in Fenton as reported by local media.

Livingston to Genesee to Oakland County

Event: Tornado - final rating EF2 - damage consistent with maximum130 mph winds.
Length - 26 miles (from 4 NE of Fowlerville through Fenton and Holly to 4 E of Holly).
Width - average width 200 yards with a maximum width of one-quarter mile in the city of Fenton.
Estimated time of tornado touchdown - 530 pm EDT.

Tornado ended at approximately 607 pm. City of Fenton damage occurred around 555 pm. Initial tornado damage was observed between Owosso and Fleming Roads approximately three-fourths of a mile north of Chase Lake Road in Cohoctah Township, Livingston County. Tornado damage was observed from the ground continuously in Livingston County through Cohoctah Township, Deerfield Township and northwest Tyrone Township where the tornado entered Genesee County and the City of Fenton. The tornado damage continued east into Oakland County through the City of Holly before becoming divergent (indicative of straight-line winds) just east of Grange Hall Road and Dixie Highway (approximately 4 E of Holly). The damage along the path was predominately consistent with EF1 (associated with approximately 100 mph winds) scale damage. However, there were 3 sections along the path that were consistent with EF2 scale damage (and associated with approximately 130 mph winds): 1. in Cohoctah Township, Livingston County, along Schrepfer Road - where a single family dwelling was destroyed; 2. in Deerfield Township, Livingston County, near the intersection of Center and Mack Roads . where substantial structural and tree damage was observed; and 3. throughout the City of Fenton, Genesee County. The City of Fenton sustained the greatest amount of damage where the tornado path widened to approximately one-quarter mile . including the snapping and uprooting of hundreds of trees, de-roofing of both residential and municipal structures, and the partial collapse of a large retail structure near the intersection of Owen Road and U.S. 23.



Southwest Lapeer County

Event: Tornado - final rating EF1 - damage consistent with maximum 110 mph winds.
Length - 4 miles across Hadley Township (from one-half mile SW of Gregory and Brigham roads to one-half mile west of Pratt and Herd road intersection).
Width - average width of 150 yards with a maximum width of 250 yards.
Estimated time of tornado touchdown was 616 pm EDT.

Initial tornado damage was observed one-half mile SW of the Gregory and Brigham road intersection in Hadley Township. Significant damage to homes, outbuildings and garages were observed at the intersection of Gregory and Brigham roads, and further east along Brigham road. Damage to homes in this area was consistent with EF1 scale damage and roughly maximum winds of 110 mph. In addition, numerous trees were uprooted and/or snapped along Gregory Road and along Brigham road to near Hadley road. Lighter tree damage consistent with EF0 scale damage and winds around 70 mph occurred from the Hadley and Brigham road intersection northeastward to Pratt road (just west of Herd road).

Northeast Washtenaw County

Event: Tornado - final rating EF0 - damage consistent with maximum 70 mph winds.
Length - 3 miles across Salem Township (from near Seven Mile and Tower Roads to near Eight Mile and Chubb Road intersection).
Width - average width was about 50 yards.
Estimated time of tornado touchdown was 602 pm EDT.

Initial tornado damage was noted just north of Seven Mile road and just west of Tower road in the area of Salem Farms Drive and Sunset Drive. This damage was primarily to trees, along with some shingle damage to roofs of houses. The damage path continued northeast to the Northville Crossings subdivision where there was damage to roofs and sidings of several homes. Further northeast there was tree damage along Currie Road just south of Eight Mile Road. The damage path weakened and ended along 8 mile and Chubb road in Washtenaw County. Throughout the path of the tornado, damage estimates were consistent with EF0 scale damage, with maximum winds near 70 mph along Sunset Drive and in Northville Crossings. Other damage to trees was more consistent with winds 55 to 60 mph.

Eastern Shiawassee County

Event: Tornado - final rating EF0 - damage consistent with maximum 75 mph winds.
Length - one-quarter mile just north of the intersection of Durand Road and M-21.
Width - approximately 50 yards.
Estimated time of tornado touchdown was 523 pm EDT.

Damage from this brief tornado was consistent with EF0 scale damage with maximum winds near 75 mph. There was substantial damage to a barn with a portion of its metal roof peeled off and the trusses damaged. Another barn had shingles peeled of its roof. There were also numerous large limbs down along the short path of the tornado.

Damage Photographs



Cohoctah Township, Livingston County, along Schrepfer Road -
where a single family dwelling was destroyed
Partial collapse of a large retail structure near the intersection
of Owen Road and U.S. 23
Damage south of Hadley in Lapeer County EF1 Damage in Hadley Township

Shiawassee County barn damage

Radar Imagery

Radar Reflectivity Loop of Tornado Outbreak

Base Reflectivity (R) at 527 p.m. EDT, just prior to the
start of the Livingston/Genesee/Oakland Tornado
Storm Relative Velocity (SRM) at 536 p.m. EDT.
Strong rotation indicated over Cohoctah and Deerfield
Townships in Livingston County


Base Reflectivity (R) at 553 p.m. EDT, as the
Livingston/Genesee/Oakland Tornado hit Fenton
SRM at 553 p.m. EDT, as the
Livingston/Genesee/Oakland Tornado hit Fenton


Base Reflectivity (R) at 602 p.m. EDT as the
Livingston/Genesee/Oakland Tornado was exiting Holly
and the Salem Township (Washtenaw County just
southeast of South Lyon) was touching down
SRM at 614 p.m. EDT. Strong rotation over
southwest Lapeer County, just minutes before the
tornado hit 2 miles south of Hadley


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