b'Wind and TornadoesWind results from dierences in air pressures due tomiles and can create wind gusts of up to 150 mph. uneven heating of the earths surface. Wind occursDerechos are very rare in Idaho.at all scales, from brief, local breezes to global winds. Straight-line (common, non-rotating) winds areTornadoes, though uncommon in Idaho, originate from responsible for most thunderstorm wind damage,severe thunderstorms. They manifest as a rotating, with occasional wind speeds exceeding 100 milesfunnel shaped cloud that extends from a thunderstorm per hour. Strong straight-line winds are generatedto the ground with whirling winds that can reach from by thunderstorms and can occur as downbursts40 to over 300 miles per hour. Furthermore, they can and derechos. A downburst is a small area of rapidlytravel across the ground at up to 70 miles per hour. descending rain and rain-cooled air beneath aDamage is usually conned to a narrow path and the thunderstorm that typically travel in one directiondegree of devastation is dependent upon the distance and can be particularly damaging. Derechos arecovered by the tornado (see Figure 8). On average, created by the merging of many thunderstormtornadoes last for about ve minutes and travel around cells into a cluster or solid line extending for many10 miles, but up to 200-mile tracks have been reported.Historic Tornado TracksFIGURE 8.Historic Tornado Tracks in Idaho (19542016)108 I D A H O I N F R A S T R U C T U R E G U I D E B O O K'