What in the World's Are They?
What makes tornadoes dangerous is that their energy is concentrated in a small area, perhaps only a hundred yards across.
Tornadoes can form any time of year, but many occur in the stormy spring, when these warm and cold air masses collide. Storms often are triggered where two different kinds of air masses meet, such as dry and moist air masses, or cold and warm air masses.
Most tornadoes form from thunderstorms. They start with warm, moist air from ONE SIDE and cool, dry air from THE OPPOSITE SIDE and When these two air masses meet, they create instability in the atmosphere.
A change in wind direction and a greater wind speed with increasing height creates an invisible, horizontal spinning effect in the lower atmosphere.
Rising air within the updraft tilts the rotating air from horizontal to vertical. An area of rotation, 2-6 miles wide, now extends through much of the storm. Most strong and violent tornadoes form within this area of strong rotation.
What in the World's Are They?
What makes tornadoes dangerous is that their energy is concentrated in a small area, perhaps only a hundred yards across.
Tornadoes can form any time of year, but many occur in the stormy spring, when these warm and cold air masses collide. Storms often are triggered where two different kinds of air masses meet, such as dry and moist air masses, or cold and warm air masses.
Most tornadoes form from thunderstorms. They start with warm, moist air from ONE SIDE and cool, dry air from THE OPPOSITE SIDE and When these two air masses meet, they create instability in the atmosphere.
A change in wind direction and a greater wind speed with increasing height creates an invisible, horizontal spinning effect in the lower atmosphere.
Rising air within the updraft tilts the rotating air from horizontal to vertical. An area of rotation, 2-6 miles wide, now extends through much of the storm. Most strong and violent tornadoes form within this area of strong rotation.
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