Figure 1: Detailed map of the Bismarck Missouri tornadic damage track and nearby microburst (June 12, 2004 - southwest St Francois County). The tree and structural damage showed an anticyclonic damage pattern with several large trees and tree limbs lying to the west-southwest. Anticyclonic tornadic damage pattern is a relatively rare event. Tree and limb damage across the eastern and southern parts of the community showed a divergent damage pattern suggestive of a microburst. The tornado occurred at approximately 8:45 AM CDT. Damage Map created by R. Przybylinski (WFO LSX).
Figure 2: Large tree fell on top of home near the northeast section of town. Viewing to the southwest.
Figure 3: Example of one of many large trees stripped by the anticyclonic tornado. This image was taken between Highway 32 and Walnut along Cedar street just south of the center of town. Debris from this and adjacent trees were lying to the west (not a typical pattern).
Figure 4: Sheet metal roofing from this building was stripped and displaced to the west. Viewing north.
Figure 5: One of a few large trees lying to the south-southeast over the southern part of town along Highway N. Viewing to the north-northeast.
Figure 6: Another large tree fell on top of a vehicle and caused damage along the western side of this home. This image was taken at the near northeast side of town. Viewing to the south-southeast.
Figure 7: Another perspective of the damaged vehicle and part of the damaged home. Viewing to the east.
Figure 8: Another vehicle was damaged by a fallen large tree. This image was taken at the near north side of town. Viewing to the southeast.
Figure 9: Structural damage to an autobody shop located near the southwest part of town.
Figure 10: Plan view image of the storm reflectivity field at 845 AM CDT showing a mini bow echo moving eastward across southwest St. Francois county Missouri.
Figure 11: Plan view image of the storm-relative velocity field at 845 am CDT showing a 'anticyclonic' mesovortex within the high reflectivity region just south of the apex of a mini-bowing segment. The anticyclonic rotation is relative rare at this location of the bowing segment. The red (warm) colors represent outbound velocities away from the radar (viewing south) and the green (cool) colors signify inbound velocities towards the radar. The location of the anticyclonic mesovortex in represented by the bright green adjacent to bright red colors. The brighter the colors the stronger the magnitudes of rotation.

NWS
St. Louis, Missouri


Bismarck, Missouri Storm
June 12th, 2004

During the morning of June 12th, 2004, a mini bow echo moved east through southern St. Francois county Missouri.  A NWS storm survey team determined that a F0 tornado and microburst caused the damage in Bismarck, Missouri.  The tree and structural damage showed an anticyclonic damage pattern with several large trees and tree limbs lying to the west-southwest.  Anticyclonic tornadic damage pattern is a relatively rare event.  Tree and limb damage across the eastern and southern parts of the community showed a divergent damage pattern suggestive of a microburst.  The tornado occurred at approximately 8:45 AM CDT.

Damage Map of Bismarck, MO Tornado Track June 12th, 2004
Tree on a home
More tree damage

Building damage

Tree damage

Tree blown over onto a vehicle

Tree blown over onto a vehicle

Another vehicle damaged from a fallen tree

Structural damage to an autobody shop

Reflectivity radar picture from 845 AM CDT

Storm relative velocity radar picture from 845 AM CDT

 


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