V
ORTEK LLCBy means of the Site Assessment of Tornado Threat (SATT) software, VorTek has just completed its annual compilation of the top twenty tornado-prone states based on the latest National Weather Service data for tornadic activity from 1950 through 2006. Mississippi again ranks number one as the most tornado-prone state. The top twenty states are as follows:
|
Rank |
State |
ACF (%) |
Annual Disturbed Land Area (Acres) |
|
1 |
Mississippi |
0.0479 |
14474 |
|
2 |
Arkansas |
0.0446 |
14862 |
|
3 |
Oklahoma |
0.0433 |
19049 |
|
4 |
Kansas |
0.0426 |
22284 |
|
5 |
Nebraska |
0.0408 |
19980 |
|
6 |
Indiana |
0.0394 |
9049 |
|
7 |
Iowa |
0.0362 |
12982 |
|
8 |
Alabama |
0.0345 |
11202 |
|
9 |
Illinois |
0.0294 |
10446 |
|
10 |
Tennessee |
0.0287 |
7559 |
|
11 |
Wisconsin |
0.0269 |
9348 |
|
12 |
Georgia |
0.0225 |
8368 |
|
13 |
North Carolina |
0.0186 |
5822 |
|
14 |
Louisiana |
0.0184 |
5238 |
|
15 |
Ohio |
0.0178 |
4667 |
|
16 |
Kentucky |
0.0172 |
4367 |
|
17 |
Pennsylvania |
0.0169 |
4859 |
|
18 |
Missouri |
0.0148 |
6533 |
|
19 |
Minnesota |
0.0142 |
7245 |
|
20 |
Michigan |
0.0142 |
5193 |
The Annual Coverage Fraction (ACF) represents the average fraction of land annually disturbed by tornadoes within the boundaries of the state from 1950 through 2006. The annual disturbed land area can be obtained by multiplying the ACF by the area of the state.