Geography Reference
In-Depth Information
Tornado Risk (%)
0
50
0 km
0 - 10
10 - 20
20 - 30
30 - 40
40 - 50
50 - 60
60 - 70
70 - 81
Victims
8
4
0.8
Method: Quartic Kernel density
smoothing in a flexible bandwidth
of the 30 nearest counties
source: NOAA
Designed and made by JM Zaninetti, University of Orleans, CEDETE Institute
Figure 1.8.
Tornado hazard assessment 2004
Tornadoes kill an average of 93 people per year in the United States. The
frequency of these localized phenomena is highest along the Tornado Alley which
runs from Nebraska to Texas, passing through Kansas and Oklahoma.
It is in Illinois and Indiana, however, that tornadoes are most disastrous - they
may be less frequent in this region, but they are generally more destructive. Only the
Pacific coast is virtually exempt from tornadoes.
