Figure 1: Detailed mapping of the F1 Femme Osage tornadic damage track over western St. Charles county - June 18, 2004. The initial tornado touchdown occurred at 2:05 pm CDT and had an overall path length of 2.0 miles. Damage width was 40 yards. Much of the damage was rated F0.
Figure 2: Damage to a row of large pine trees which were snapped approximately 1/3 up the trunk of the pines. The upper parts of the pine trees were displaced approximately 100 to 200 yards to the east-northeast.
Figure 3: This is one of many examples showing the upper parts of trees snapped and displaced east-northeast. The tree damage occurred along the southeast side of Femme Osage Creek Road between Cappen Femme Osage road and Becker Joehlingh roads.
Figure 4: Fallen trees and large limbs along Femme Osage Creek south of the intersection of Femme Osage Creek and Becker Joehlingh roads.
Figure 5: Additional fallen trees and large limbs along Femme Osage Creek south of the intersection of Femme Osage Creek and Becker Joehlingh roads in western St. Charles county.
Figure 6: Plan view image of the storm reflectivity field (201 PM CDT) of the mini-supercell which spawned the weak tornado in western St. Charles county.
Figure 7: Image of the storm-relative velocity field showing a very strong but small mesocyclone (cyclonic-convergent pattern). The green (cool) colors represent inbound velocities towards the radar while the red (warm) colors represent outbound velocities away from the Doppler radar.

NWS
St. Louis, Missouri


Femme Osage, Missouri Tornado
June 18th, 2004

During the afternoon of June 18th, 2004, 

Damage Map of Femme Osage, MO Tornado Track June 18th, 2004
Tree damage
More tree damage

More tree damage

Tree damage

Radar reflectivity image from 201 PM CDT on June 18th, 2004

Radar storm relative velocity image from 201 PM CDT on June 18th, 2004

 

 


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