V
ORTEK LLCAs part of an ongoing company-funded research study of tornadic risk assessment, by means of the Site Assessment of Tornado Threat (SATT) software, VorTek has determined the rankings of the top twenty tornado-prone cities for the month of June. The rankings, based on National Weather Service data from 1950 through 2006, are as follows:
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DISTURBED LAND |
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RANK |
CITY |
ACF (%) |
AREA (ACRES) |
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1 |
Cincinnati, OH |
0.0362 |
291 |
|
2 |
Worcester, MA |
0.0320 |
257 |
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3 |
Des Moines, IA |
0.0248 |
199 |
|
4 |
Minneapolis, MN |
0.0245 |
197 |
|
5 |
Topeka, KS |
0.0229 |
184 |
|
6 |
St. Paul, MN |
0.0209 |
168 |
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7 |
Pittsburg, PA |
0.0163 |
131 |
|
8 |
Madison, WI |
0.0138 |
111 |
|
9 |
Kansas City, KS |
0.0104 |
84 |
|
10 |
Aurora, IL |
0.0104 |
84 |
|
11 |
Oklahoma City, OK |
0.0101 |
81 |
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12 |
Sioux Falls, SD |
0.0100 |
80 |
|
13 |
Naperville, IL |
0.0098 |
79 |
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14 |
Tulsa, OK |
0.0088 |
71 |
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15 |
Kansas City, MO |
0.0077 |
62 |
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16 |
Independence, MO |
0.0076 |
61 |
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17 |
Lincoln, NE |
0.0073 |
59 |
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18 |
Lafayette, LA |
0.0073 |
59 |
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19 |
Overland Park, KS |
0.0072 |
58 |
|
20 |
Wichita, KS |
0.0071 |
57 |
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The Annual Coverage Fraction "ACF" represents the average fraction of land area within a 20-mile radius of the city annually disturbed by tornadoes during June for the 57-year period from 1950 through 2006. The "disturbed land area" represents the average number of acres of land within a 20-mile radius of the city annually disturbed by tornadoes during June for the same 57-year period.
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