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<br />Below is a CO-OEM map displaying tornado paths across the planning area. <br /> <br /> <br />1-- <br /> <br />..- <br /> <br />--7 <br /> <br />" <br /> <br />.,./ <br /> <br />-......... <br /> <br />\ <br />.. \ <br />-t_~ <br /> <br />Ii"~ <br /> <br />Tornado paths 1950-1996 <br />/\/5 Fujita Intensity <br />N4 <br />NJ <br />N2 <br />1 <br />NO <br />Te)(t County Names <br />D County boundaries <br />< \ ~ Fire perimeters 2002 <br /> <br />/ I <br /> <br />70 <br /> <br />70 <br /> <br />140 Miles <br /> <br />N <br /> <br />W.E <br /> <br />... <br /> <br />" -. <br /> <br />s <br /> <br />The map only shows a representative sample of the tornadoes that have occurred within the <br />planning area. Tornadoes have occurred across the planning area with alarming frequency. <br /> <br />Tornado Occurrence er County: 1950-1997 <br />Cheyenne 65 <br />Elbert 51 <br />Kit Carson 71 <br />Lincoln 60 <br />Logan 49 <br />Morgan 50 <br />Phillips 27 <br />Sedgwick 23 <br />Washington 93 <br />Weld 192 <br />Yuma 62 <br />11 County Total 738 <br /> <br />Individual County Data from each County <br /> <br />Based on the information above, the northeast Colorado planning area has experienced an <br />average of 16 tornadoes per year. There are no official recurrence intervals calculated for <br />tornadoes. However, if one assumes a tornado affects one square mile and there are 21,600 <br />square miles in the planning area, the annual probability of a tornado hitting any particular <br />square mile in the planning area is 16 in 21,600, or a 0.07% (.0007) chance. <br /> <br />Most of the tornadoes that have struck the planning area have been rated as FO, or Fl, with an <br />occasional F2. The only tornado recorded within the planning area higher than that was the F3 <br />that struck Limon in 1990 (NCDC). It caused an estimated $25 million in damages. No deaths <br />occurred, but there were 14 reported injuries. Most tornadoes within the planning area merely <br />form and dissipate over open space. <br /> <br />17 <br />