Storm Damage Survey Results from June 17th, 2007 Severe Weather Event


Storm Survey Summary

-The survey crew stopped in Bowdle to get eyewitness accounts and estimated locations of the tornadoes they saw the night before.  The two spotters were together and witnessed 3 tornadoes total.  Two tornadoes were spotted together north of Hoven at 8:40 pm.  No damage was found or reported upon inspection of the area.  The other tornado was located 4 miles southwest of Bowdle and occurred at 8:42 pm.  A possible track was found in a grain field, but no other damage was found.

Possible Tornado Track

Possible Tornado Path


-An emergency manager reported damage to a farm after the storms moved through on the night of June 17.  The survey team went to the farm to inspect the damage the morning of June 18.  The roof of a pole barn had been blown to the south, and the roof of another cylindrical barn was blown against 3 grain bins.  The second cylindrical barn had a history of wind damage to it due to an open area about 15 to 25 feet deep.  The same section of roof was blown off when the wind caught it about two years earlier. Debris movement appeared to be to the south, but the wind probably came from the southwest into the opening.  The three grain bins adjacent to the building caught the section of tin roof and kept if from moving very far.  Damage on north side of farm included a grove of Cottonwood trees.  One large tree was blown over to the southeast, and another large tree with branches and leaves was leaning over with branches and leaves missing. Additional damage was found to smaller trees in a path that went northeast toward 322nd Ave.  Another small metal building near the grove of trees and the smaller trees was also damaged.  Two vehicles at the residence had the back windows broken out, although only one vehicle was present at the time of the damage survey.

A circulation was present on radar at the exact latitude and latitude of the farm.  This in conjunction with the southern pole barn damage and tree damage deemed an EF0 rating with wind speeds estimated between 75 and 85 mph.  An eyewitness account confirmed the extreme wind, although no tornado was seen as shelter was taken.

Damage to Pole Barn

Damaged pole barn on the south side of the farm.  Photo is looking south-southeast.

Pole Barn Damage

Pole Barn Damage

Damage to the roof of the pole barn with a large section missing.

 Pole Barn Damage

West-facing door dropped to the west.

Pole Barn Damage

Roof debris found on the south side of metal gates. Photo is looking south.

 Pole Barn Damage

Photo looking west-northwest toward additional debris from roof that was blow to the south.

Vehicle Window Damage

Vehicle Window Damage

Vehicle with broken back window.

 Structure Damage

Cylindrical building damage with roof against grain bins.

 Structure Damage

Third metal building with damage.

Tree Damage

Cottonwood grove damage.

 Tree Damage

Smaller trees damaged/uprooted.

 
-Radar indicated a possible tornado near Eureka, but the team wasn’t able to find any damage.  Road access to the potential location contributed to the negative search.  The team also looked for flooded homes with the previous report of backed up sewers and flooding basements.  No evidence of major flooding was observed.  However, the American News from June 19, 2007 did highlight a woman who’s basement flooded.  Backed up sewers were also confirmed in the newspaper article.

-The National Weather Service received a report of damage at a residence in Brown County on 124th Street.  A small motorized camper was pushed about 30 to 35 feet to the north-northeast towards the residence. A small, unanchored garage was nudged about 6 inches to the northeast.  Numerous broken trees were observed, including missing tops of two trees in a grove.  No trees were uprooted, but large branches were broken. No other damage was found in the area, and all damage was in the southwest to northeast direction.  Based on the damage, winds speeds were estimated to be 70 to 80 mph.

Tree Damage from Brown County

Cottonwood split at the base.

Tree Damage in Brown County

Same broken cottonwood with additional branches broken on the standing section.

Tree Damage in Brown County

Grove of damage trees with tops missing in the left of the photo.

Tree Damage in Brown County

Tree on the west side of the residence with damage.  Flattened grass also in the same direction.

Camper pushed by wind

Camper was pushed from dirt pad in foreground toward residence.

Camper pushed by wind

Camper that was pushed by the strong wind.


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