SPC Stats

Path length: 40.97 miles

Width:  2100 yards

Fatalities:  9

Injuries:  70

Rating:  EF5

County:  Grundy, Butler, Black Hawk

Per the Storm Prediction Center Database, there have been 6 F5/EF5 tornadoes observed since 1950 in the state of Iowa.  The last one hit on May 25, 2008 and is the topic of this summary.  General overview of the tornado track via the NWS Des Moines.  More detailed survey information listed below from a paper written by Tim Marshall.
  • The massive tornado which eventually grew to over a mile wide began near the Butler/Grundy County line, 2 miles south of Aplington at 4:48pm CDT.
  • Within 8 minutes, the tornado had grown to almost 3/4 of a mile wide as it moved into the southern end of Parkersburg.  A third of the town experienced tremendous damage.   
  • At 5:09pm, the twister moved just north of New Hartford causing structural and tree damage.  It weakened east of town and traveled into northern Black Hawk County staying north of Waterloo and Cedar Falls. 
  • During this time, significant straight lines winds were produced from a large rear flank downdraft just south of the tornado track.  A wind gust of 93mph was measured at the Waterloo Airport.
  • North of Dunkerton, the tornado strengthened once again and reached its max width of close to 1.2 miles. Tremendous damage occurred to a farmstead in this area. 
  • The tornado lifted at 5:50pm SW of Fairbank near the Black Hawk/Buchanan County line.

The official path length is listed as 40.97 miles.  A few other sources though, including Storm Data and the detailed survey from Tim Marshall have a path of 43 miles.

A satellite tornado was observed by storm chasers and an off duty NWS employee south of the main tornado.  It traveled about a mile in Grundy County.

Per the NWS summary in Storm Data:  “At least 627 homes were damaged, including 288 homes destroyed in Parkersburg, 88 in New Hartford, 15 in Hazelton and another 50 in Black Hawk County.  In addition, 58 had major damage, 33 had moderate damage, 2 were inaccessible, and 93 damaged but able to be occupied.  There were also 21 businesses destroyed.  Governor Chet Culver declared both Butler and Black Hawk disaster areas with both given the State Declaration.  A Federal Disaster Declaration occurred two days later for both Butler and Black Hawk Counties.”

An initial survey team was deployed on Monday, May 26 at 10am.  40+ damage indicators were identified during the survey.  In parts of Parkersburg and New Hartford, low end EF5 damage was discovered.  Additional investigations occurred including one led by Tim Marshall.  He presented a paper on how the rating was determined with Karl Jungbluth (NWS Des Moines) and Abigail Baca (Risk Management Solutions).  Per the paper, “Difficulties in rating homes arose since several homes were not anchored and slid off their foundations.  Also, there was significant clean-up of debris within one to two days after the tornado, even in the midst of inclement weather.”

The survey determined that the tornado traveled to the ENE for approximately 70 km (43 miles).  98% of the track was over rural farmland. The remaining 2% was over the south end of Parkersburg.  “Spiral ground marks were observed in many fields where corn stubble had been gathered indicating this was a multi-vortex tornado.  Complex flows were recorded in the corn stubble revealing sudden changes in the tornado’s path and even one loop.”  Additional highlights from this survey.  Note any pictures below come directly from this survey:

  • The tornado moved into the SW corner of Parkersburg around 456pm CDT, traveling eastward along Highway 57/14.
  • The tornado’s intensity increased at the east end of town as more debris was ingested into the twister.
  • A wind row of debris was noted in open corn field east of town.
  • Large grain silos filled with corn were hit east of town.
  • The tornado then tracked through river bottoms uprooting and breaking hundreds of trees.
  • It then moved north of New Hartford where more than a dozen homes were completely destroyed.
  • 3 miles east of New Hartford, the tornado’s path narrowed and it turned quickly to the south before moving back to the ENE.
  • Two more abrupt turns were observed to the southeast before the tornado moved toward Highway 63.
  • After crossing the highway, “the ground spirals tightened, and became oblong in shape.  Then the tornado made an S-shaped turn to the north before moving northeast.”
  • The tornado then widened and made a loop and a satellite vortex formed.
  • Moved back to the ENE and dissipated SW of Fairbanks.
EF-scale numbers were assigned to 440 wood-framed houses, 370 of which were in Parkersburg.  “EF-5 ratings were given to homes that were swept clean above their anchored floor platforms.”  Per the survey, 4% of the homes surveyed were given the EF-5 rating (17 out of 370).  They were mainly in the eastern portion of the damage path.
Per the survey, “The fact that homes were swept away did not by itself indicate EF-5 damage.  Consideration was given to the type of foundation and anchorage, as well as the degree of the surrounding damage to homes and trees.”  It was noted that wind rows of fine debris were visible along the center line of the path.  Also, debris impact marks were observed on debarked trees in town.  In rural areas, wet top soil and corn stubble was embedded in buildings, utility poles and barbed wire fences. 
Over 200 vehicles were found to have damage.  50% of the vehicles had not moved but were plastered with debris.Three vehicles were rolled or lofted. Parkersburg High School received significant damage. Per the survey, two sections of the high school collapsed to the south. The gymnasium was damaged in a similar fashion. “Six, hollow spun, steel reinforced concrete light poles toppled to the west and northwest in a baseball field located just east of the high school. All six poles left impact marks in the ground.”
News reports indicated that a receipt from Parkersburg was found 3 miles north of Prairie Du Chien, WI.  That is over 100 miles NE of the tornado track.  Receipts were also found in Clayton County near Elkader (86 miles from Parkersburg).  Scrapbook pages and photos were found in far northeast Bremer County at Sumner (50+ miles away).

    There were 9 confirmed fatalities.  7 were in the Parkersburg area and 2 in New Hartford.  Two deaths occurred a few days after the tornado hit and the last fatality was reported on November 7, six months after the tornado.  Per the NWS, a 61-year-old woman, was injured in the stairwell of her home.  A 2×4 was thrown through her right side lung.  She died of complications from her injuries.

    In an article on extremeplanet.me entitled, “The List of the Strongest Tornadoes Ever Record:  Part III”, Parkersburg landed at #11 out of 20.  The town’s mayor is quoted from a 2008 NY Times article.  He states that most of those killed in Parkersburg were in their basements.  “Many of the destroyed homes were swept completely away, floorboards and all, exposing people who had taken shelter underground to the full force of the tornado.”

    Rebuilding the Town and More Tragedy A Year Later

    You keep moving forward; you remain positive

    An article was posted in The Christian Science Monitor on June 7, 2011 entitled, “Parkersburg, Iowa, emerges as model for tornado recovery.”  The story describes how this small town in the middle of the country recovered after a horrific EF-5 tornado.

    Within one year after the twister, the destroyed high school had been rebuilt.  This was one of the first goals set by the town’s administrators.  “This decision was important because the community was proud of its football team.”  In it was a basement-level, cement-enclosed wrestling room which would also become a storm shelter for the students and faculty.

    Parkersburg had their own volunteer coordinator to handle the influx of college students and nearby residents who came to help with cleanup and the rebuild.  Only a year early, Greensburg, KS  had been struck by an EF-5 tornado. Children from Greensburg sent in pennies they had saved to help the town of Parkersburg.

    I discovered in my research that just over a year after the tornado, on June 20, 2009, the beloved coach of the Aplington-Parkersburg football coach, Ed Thomas was murdered.  He was killed by a former football player who was later diagnozed with paranoid schizophrenia.  Horrible tragedy for a town that had already endured so much. 

    Tornado Path

    Via Tim Marshall Survey
    From NWS Des Moines Poster. Click to enlarge.

    Radar via NWS Des Moines

    Velocity mode at 4:59pm

    Tornado Photos

    From the NWS Des Moines Survey Report

                                                 Photo via chjkls on Flickr

    Damage Photos via NWS Des Moines Summary & Service Assessment

    Aerial view of damage in Parkersburg. Photo courtesy of John McLaughlin and Iowa Helicopter.

    Photos via extremeplanet.me all credited to the NWS

    Aerial view of extreme damage in Parkersburg. Per extremeplanet: "The damage to the industrial buildings at lower left was deemed to be of EF5 intensity" (NWS Survey, 2008).
    Views of EF5 damage to a home east of Parkersburg. Per extremeplanet: "Extreme winds knocked over thick, well-anchored basement walls and left cracks in the home’s foundation. The streak of damage east of Parkersburg was marked by partially scoured grass and pronounced wind rowing, both indications of EF5 intensity. In the image at right, view of finely mulched debris from homes more than a half mile to the west." (NWS, 2008)
    From extremeplanet: "The remains of a frame home in New Hartford. The woman who lived at the residence was killed despite seeking shelter in the home’s basement. Trees in the area were completely debarked, and a vehicle that was stripped to its metal frame can be seen in the background. (Jungbluth, 2008)"

    Aerial photos one week after the tornado via Mark Ahrens on Flickr

    Damage East of Parkersburg
    Parkersburg from the West

    Misc Photos via Flickr

    Parkersburg Tornado-65
    Parkersburg Tornado
    Parkersburg Tornado
    Parkersburg Tornado-24
    Parkersburg Tornado 58
    Golf course on east side of Parkersburg


    Bank Security Camera of Parkersburg EF-5 Tornado-May 25, 2008 via NWS Des Moines Facebook Page

    Parkersburg before and after the EF-5 tornado on May 25, 2008 via NWS Des Moines Facebook Page

    YouTube embed via rjo232KCRG – An ATM surveillance camera from First State Bank in Parkersburg, Iowa caught this amazing footage of a house being destroyed by the deadly May 25th EF-5 tornado.

    YouTube embed via TheNStew – Nick Stewart produced this documentary for KGAN on the 10 year anniversary of the event

    YouTube embed via TheNStew – Nick Stewart produced this documentary for KGAN on the 10 year anniversary of the event

    YouTube embed via eloisegugenheim.  View of the damage from Kwik Star.

    YouTube embed via eloisegugenheim.  View of the damage from the corner of 3rd St and 4th Ave in Parkersburg.


    Newspaper Clippings

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