How are tornadoes formed?
Thunderstorms form as the result of the collision of warm, moist air and cold air from the northern part of the country. The rotation caused by the collision of warm and cold air can then become unstable and turn, causing the formation of a tornado. Tornadoes can be translucent, until debris is picked up and sucked through the funnel.
Are tornadoes a threat to Houston?
While most tornadoes occur in "Tornado Alley," an area of the southern plains stretching from South Dakota to northern parts of Texas, warm, moist air from the Gulf of Mexico interacting with cold air fronts have been known to form tornadoes in southeast Texas. Also, tornadoes can form as the result of tropical systems, such as hurricanes.
What is the difference between a Tornado Watch and Warning?
The National Weather Service will issue tornado watches and warnings when conditions warrant:
- A tornado watch is issued when conditions exist that are favorable for the formation of tornadoes. You should remain vigilant of conditions and be prepared to seek shelter if necessary.
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A tornado warning is issued when a tornado is actually occurring. You should take shelter immediately.
What should I do if a tornado warning is in effect, or I see a tornado?
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You should seek shelter immediately. The best place for you to shelter is in the interior room of a structure, on the bottom floor, a place without windows.
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Vehicles do not provide adequate shelter during a tornado. You should seek shelter in a sturdy building.
- If there is no shelter available, lie flat in a ditch or low-lying area. Do not get under an overpass or bridge. You are safer in a low-flat place.
