DYNAMIC mf;jeorology. 421 



TithU of fri'ijuency of tonutdocn in each State — Coutiuiied. 



Statf (ir 'reniloiy. 



Ari>a in 



units of 

 10,000 



miles. 



Idaho 



Illinois 



luiliaua 



ludiau Territory 



Iowa ..A 



Kansas 



Kentucky 



Louisiana 



Maine 



Maryland 



Massachusetts .. 



Michigan 



Minnesota 



Mississippi 



Missouri 



Montana 



Nel)raska 



Nevada 



New Hampshire . 



New Jersey 



New Mexico 



New York 



Nortli Carolina.. 



Ohio 



Oregon 



Pennsylvania 



Rhode Island 



South Carolina . . 



Tennessee 



Texas 



Utah 



Vermont 



Virginia 



Washinstou 



West Virginia... 



"Wisconsin 



Wyoming 



8.0 



!J. 5 

 3.4 

 6.9 

 5.5 

 8.1 

 ;(. 8 

 4.1 

 3.5 

 1.1 

 0.8 

 5.6 

 8.4 



4. 7 

 0.5 



14.4 

 7.6 



11.2 

 0.0 

 0.8 



12.1 

 4.7 



5. 1 

 4.0 

 0.5 

 4.6 

 "%1 



;j. 4 



4.6 

 27.4 

 8.4 

 1.0 

 0.1 

 7.0 



Finley's lecord. 



Tornadoes from 1874 to 1881, 

 inclusive (eight years 

 complete). 



Total 

 uumhor 

 of torna- 

 does. 



Length 

 of record 

 (years). 



Finley's 

 numhers. 



50 



24 



1 



26 



55 



5 



11 



3 



8 



7 



13 



21 



9 



40 



1 



14 



1 



3 



5 



1 



20 



14 



21 



Annual 

 Annual average 

 average per 10,000 



per Stare. 



C. 2 

 3.0 

 0.1 

 3.2 

 6.9 

 0.6 

 1.4 

 1.4 

 1.0 

 0.9 

 1.6 

 2.0 

 1.1 

 5.0 

 0.1 

 1.8 

 0.1 

 0.4 

 0.0 

 0.1 

 2. 5 

 1.8 

 2.6 



si|uari' 

 miles. 



1.6 

 1.9 



0.2 

 1.1 



0.1 

 1.4 

 0.1 



1.13 



0.88 

 0.01 

 0.58 

 8.85 



0. IQ 

 0.34 

 0.40 

 0.91 



1. 12 

 0. 29 

 0.31 

 0. 23 

 0.77 

 0.01 

 0.24 

 0.01 

 0.44 

 0.75 

 0.01 

 0.53 

 0.35 

 0.05 



0.46 



0.47 

 0.41 

 0.08 



0.20 

 0.17 



0.04 

 0. 26 

 0.01 



When we consider the narrowness and shortness of the destructive 

 portion of the paths of most "tornadoes," we see that even in Kansas 

 and Iowa the probability tliut any given spot will be visited by one is 

 at the rate of less than 1 [)er cent, per century, or less than the chance 

 of death by lightning or railroad accident, or other casualty. 



These storms move along nearly with the i)revailing .mriieial cnrrent 

 of air at the cloud level, but detiecting somewhat as inllneiiced by the 



