EOSC 114 Chapter Notes - Chapter module 5: Cumulonimbus Incus, Tornado Alley, Vertical Draft
23 Nov 2017
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Lightning risk : three ways lightning can strike people outdoors. Side flash: a ects people taking shade under a tree. Lightning comes down to to a tree directly, and sideways to the person under the tree. Cannot jump more than 2m away from the tree. People may or may not be a ected, depending upon the voltage di erence of their two feet. Portion of people who survive a lightning strike - 90% Florida is known as the lightning alley of north america. Lightning in canada: 2. 4 million cloud to ground strikes in a year causing 6-12 deaths per year. Estimating lightning distance - count the number of seconds between when you see the lightning and hear the thunder and divide it by 3 to estimate the range in km to the lightning. 30/30 rule: if time between lightning and thunder is less than thirty, then move indoors and stay there until 30 mins.
