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 2005, 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 |
0.0368 |
295 |
|
2 |
Worcester, MA |
0.0326 |
262 |
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3 |
Des Moines, IA |
0.0253 |
203 |
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4 |
Minneapolis, MN |
0.0249 |
200 |
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5 |
Topeka, KS |
0.0234 |
188 |
|
6 |
St. Paul, MN |
0.0213 |
171 |
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7 |
Pittsburgh, PA |
0.0166 |
133 |
|
8 |
Madison, WI |
0.0141 |
113 |
|
9 |
Kansas City, KS |
0.0106 |
85 |
|
10 |
Aurora, IL |
0.0106 |
85 |
|
11 |
Oklahoma City, OK |
0.0103 |
83 |
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12 |
Sioux Falls, SD |
0.0101 |
81 |
|
13 |
Naperville, IL |
0.0100 |
80 |
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14 |
Tulsa, OK |
0.0090 |
72 |
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15 |
Kansas City, MO |
0.0077 |
62 |
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16 |
Lincoln, NE |
0.0075 |
60 |
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17 |
Lafayette, LA |
0.0074 |
59 |
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18 |
Overland Park, KS |
0.0073 |
59 |
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19 |
Wichita, KS |
0.0072 |
58 |
|
20 |
Boston, MA |
0.0069 |
55 |
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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 56-year period from 1950 through 2005. 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 56-year period.
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