Dickinson Tornado on July 8th

Public Information Statement National Weather Service Bismarck ND

...Here is information on the tornado that struck Dickinson North Dakota
Wednesday evening July 8 2009...
 
Note...tornado intensity rating is determined by the worst damage
found along the tornado path.
 
Tornado information
Intensity...EF3
Tornado wind speed determined by EF rating...around 150 mph
Path length...nearly 2 miles
Path width...maximum around 350 yards (two tenths of a mile)
 
The National Weather Service Bismarck office conducted a storm
damage survey in and around the Dickinson area on Thursday.
Meteorologists walked through the area and spoke with numerous
people affected...many of whom were eye witnesses to the event.
 
The conclusion of the damage survey was that a tornado touched down
around a mile or so outside the city limits...on the southwest
side...and moved east...passing through the far southern part of the
city...and lifted back up on the extreme southeast side of
Dickinson. This occurred in the window between 815 PM MDT and 830 PM
MDT.
 
The worst damage surveyed was between the Heart River and (roughly)
8th Street SW / 8th Street SE. Of that damage...the absolute worst
corresponded to EF3 on the Enhanced Fujita scale. From that it was
determined that wind speeds in the tornado were on the order of 150
mph.
 
Some homes were almost completely destroyed...and are total losses.
A church was partially collapsed. Roofs were torn off or severely
damaged. Large sections of some roofs were thrown a half block
away. Several vehicles were flipped while others had all the windows
broken out. Tree damage was extensive...some were snapped...others
were uprooted. Leaves were stripped from branches. Insulation was
plastered on the sides of homes and vehicles. Power poles were
snapped.
 
At the time of this report information from emergency management
officials was that there were no deaths...and only a few very minor
injuries.
 
EF tornado damage scale
EF0...65 to 85 mph
EF1...86 to 110 mph
EF2...111 to 135 mph
EF3...136 to 165 mph
EF4...166 to 200 mph
EF5...201 mph and higher.
 
JP Martin


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