Life Cycle of a Thunderstorm Cell and Associated WeatherĪ thunderstorm is a violent local storm produced by a cumulonimbus cloud and accompanied by thunder and lightning.Thermodynamics of Thunderstorm Development.Conditions Necessary for Thunderstorm Development.But let us not become overconfident! The few fires that do start may be hard to find and may “sleep” until the woods dry out, and then suddenly become major conflagrations. On the beneficial side, heavy precipitation from “wet” thunderstorms moistens fuels, decreases the activity of going fires, and lessens the risk that lightning strikes will start fires. In dry periods, such fires have burned hundreds of thousands of acres in the Western United States and Canada during a few days. Several hundred wildfires can be started by lightning during one day on a single forest or district, overwhelming all possible fire control efforts. These so-called “dry” thunderstorms occur mainly in the mountainous West. But the problem is most serious where thunderstorms produce little or no precipitation that reaches the ground. Wildland fires may be started by lightning most anywhere on the North American Continent where thunderstorms occur. The second is the thunderstorm downdraft which spreads out upon nearing the ground, producing strong, shifting, and gusty winds for a short time. The first is the fire-starting potential caused by lightning strikes from cloud-to-ground. Two characteristics of thunderstorms make them an important element in fire weather.
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