Storm Watchers:

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Motivation

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CLICK TO PLAY During this Storm watchers presentation, you will learn about a few different tornadoes and how actual Storm Chasers rate the intensity of the tornadoes they see. You will also be tested periodically to make sure you’re keeping up with all the facts about these terrifying twisters!

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When this button appears, you will be quizzed on the information you have learned. (This button is nonfunctional, it is just a preview)

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In This Presentation:

You will learn about three types of Tornadoes.

We will cover Land Spout, Water Spout, and Super Cell Tornadoes.

You will be quizzed throughout this power point to test your knowledge of these different tornadoes!

Basic Facts:What is a tornado? A tornado is a rotating

column of air that is accompanied by a funnel shaped downward extension of a cloud.

Tornadoes are very violent and can cause severe damage.

About 1,000 tornadoes hit the United States each year.

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Tornadoes can occur everywhere, but majority of them occur in the middle of the United States.

“Tornado Alley” is the area that has the strongest tornadoes. This includes SD, NE, KS, OK, TX, and CO.

Where Are They Found?

How Do Tornadoes Form? Tornadoes usually begin

in the form of a thunderstorm.

When two masses of different temperatures and humidity meet, they are likely to form.

If lower layers of the atmosphere are unstable, an upward movement of warmer air is formed.

The rising air within the updraft tilts the rotating air from horizontal to vertical.

As it rises, it begins to spiral and intensify.

Land spoutWaterspoutSuper Cell

Most Common Tornadoes:

Land Spouts This is a land-based

tornado. Most often occur in dry

areas with high-based storms.

They are usually defined by swirling dust, may have a weak condensation funnel reaching up to the cloud base, and can be quite destructive.

Land Spout Vocabulary:

Updraft: air currents full of warm, moist air

Funnel: the shape of the tornado

Vortex: the center of the tornado that acts like a vacuum

Land Spout Review:

A Land Spout is a land based tornado

It extends from a cloud Their centers are called vortexes

On to the Quiz!

QUIZ TIME!The Vortex is the

_____ of the tornado which acts

like a vaccum ?A Updrift

FunnelB

C Center

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OOPS!

TRY AGAIN!

GREAT WORK!

Move onto the next lesson!

BACK TO TORNADO PAGE

GREAT JOB!

Waterspout Tornadoes:-Intense columnar vortex that occurs over a body of water and is connected to a cumuliform cloud.

-A Cumuliform cloud develops in a vertical direction

Life Cycle: There are 5 stages to the waterspout

life cycle: -Formation of a dark spot on

water surface -Spiral pattern on the water

surface -Formation of a spray ring -Development of visible

condensation funnel -Ultimately decay

Where do they occur?

These tornados occur mostly in the tropics, but can seasonally appear in the temperate areas throughout the world.

Common on the Great Lakes during late summer and early fall.

Approximately 160 waterspouts occur each year.

REVIEW: Cause little damage.

Occur mostly in the tropics Life cycle is in 5 stages

ON TO QUIZ

QUIZ TIME!

Where do these tornados mostly

occur?

United States

Australia

A

B

C

The Tropics

LET’S TAKE A CLOSER LOOK…

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OOPS!

Continue onto the next lesson!

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GREAT JOB!

Super Cell Tornado

Super Cell Vocab:

A super cell is a thunderstorm that is characterized by the presence of a mesocyclone A mesocyclone is a deep, continuously-rotating updraft An updraft is the vertical movement of air. It is one of two forces causes the air to move

Characteristics Of Super Cells: Isolated from other thunderstorms They usually produce amounts of hail, strong rainfall, and strong winds. Develop two separate updrafts with opposing roatations

Super Cell Review: A super cell is a thunderstorm that is characterized by the presence of a mesocyclone

Super Cells form from strong winds and their updrafts

Super Cells are most commonly found in the Midwest, in tornado alley.

ON TO QUIZ

QUIZ TIME!

This tornado is formed by a ________, a deep

continuously rotating updraft.

Vortex

ThunderstormA

B

C Mesocyclone

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QUESTION

OOPS!

Continue on to the next lesson!

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GREAT

JOB!

THE FUJITA SCALE

How To Use The Fujita Scale?

The scale helps to decide the intensity of a tornado based on the amount of damage that has occurred.

In order to use it, just identify which damage was caused and look at its rating.

What would the F-rating of a tornado that turns over trains and cars be?

Let’s Practice!

The Correct Answer Is F3!

QUIZ TIME!

Amount of damage

Wind Speed

Location where it occured

A

B

C

The Fujita Scale helps to

find the intensity of the tornado based off the ______?

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QUIZ TIME!

TRUE FALSE

TRUE OR FALSE:The Fujita Scale is

useful for predicting when

tornados will occur ?

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You Answered Correctly!Continue On!

GREAT JOB!