It was a cloudy, grey day. It was rainy and windy. The children watched the lightning through the classroom window. Some of the students began to get scared. Mrs. Kim decided it was a good time to discuss storm safety.
"I see that some of you are getting nervous about the weather," started Mrs. Kim.
"I don't like storms," said Tammy. "They are scary."
"I don't like them, either," added Ryan. "The thunder is really loud."
"Are we going to have a bad storm?" asked David.
"The National Weather Service has an office at the airport," began Mrs. Kim. "It is their job to watch the weather. They use radar and people to watch what is happening."
"How does that help?" asked Faye.
"Scientists look at the radar pictures and listen to the weather watchers," answered Mrs. Kim. "If they think conditions are right for a big storm, they issue a thunderstorm watch. If a storm does form, they will issue a thunderstorm warning."
"So a watch means they are watching for a storm to happen," said Joe. "And a warning is telling us that a storm is on the way."
"That's right," said Mrs. Kim. "A tornado sometimes forms when cold air and warm air meet."
"What is a tornado?" asked Tim.
"A tornado has very high winds that swirl around. They swirl so fast that they can form a funnel. Let's see if I can show you what a funnel is."
Mrs. Kim took 2 two-liter soda bottles. She filled one of the bottles about two-thirds full. Then she put a few drops of blue food coloring into the water.Paragraphs 14 to 32:
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