This section has two pages. Click on the pdf icon at left if you do not have an  activity sheet for this section.

A - Occurrence

Click here to go to the PREPAREDNESS GUIDE site.

• Read the information and answer the following questions.

1. Describe where most United States tornadoes occur.
2. What time of year do most tornadoes form in the United States?
3. Describe the most violent tornado in terms of wind speed and size of the damage path.

B - Variations

• Scroll down to the "Tornado Variations" section.

1. Read the section and answer:
   1. Are tornadoes always easy to see?
   2. What happens to make them visible?
2. What is a tornado over water called?

• Scroll down to the "Tornadoes Take Many Shapes and Sizes" section.

1. Which tornadoes occur most often: weak, strong, or violent?
2. Most tornado deaths are caused by violent tornadoes. Violent tornadoes represent what percent of all tornadoes?

Home | El Nino | Storms | Atmosphere | Fisheries | Great Lakes | Oceans | Teacher

Science with NOAA Research
Updated November 28, 2006