lab 10 - Name Chris Regan Lab 11 Severe Storms Objective...

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Name: Chris Regan Lab 11: Severe Storms Objective: This lab is designed to introduce students to the characteristics of general thunderstorms, severe storms, and tornadoes including lightning, hail, strong winds, and tornadoes. A specific case study of the April 11 th , 1965 Palm Sunday tornado outbreak will be discussed and analyzed to determine the effects of the large tornado that impacted Crystal Lake, Illinois. Materials needed: Textbook Part 1: Air Mass Thunderstorms Air mass thunderstorms are considered localized, short-lived storms that form and dissipate over a short period of time. These storms, which may produce heavy rains for a short period of time along with frequent lightning, are not considered severe. General Characteristics: 1. Use your text book and complete the following tasks: Labe each stage of the air mass thunderstorm. Describe what is happening during each stage. Click here to enter text. Click here to enter text. Click here to enter text. Label Stages 1
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2. Describe the steps of an air mass thunderstorm. 3. Which stage of an air mass thunderstorm appears to be the strongest? Click here to enter text. 4. Is precipitation falling during the mature stage of the storm? Click here to enter text. 5. Why does the storm weaken so rapidly? Click here to enter text. 6. Why would an air mass thunderstorm be desirable during a hot humid summer day? Click here to enter text. 7. What time of day would you think an air mass thunderstorm would occur? Click here to enter text. 8. True of False? These storms usually last less than one hour in duration. 9. True of False? These storms are often considered severe. 10. True of False? These types of storms are more common during the winter than in summer? 11. The following map depicts the average number of thunderstorms days per year in the U.S. Which state has the most days with thunderstorms? Why? 2
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Click here to enter text. 12. What’s the approximate average number of days with thunderstorms in Crystal Lake? Part 2: Lightning Most lightning events are associated with localized, short-lived storms. 1. The first step in the formation of lightning is the advancement of a negatively charged Click here to enter text. 2. How many times hotter is a lightning strike as compared to the surface of the Sun? Click here to enter text. 3. Cloud to cloud lightning is sometimes called Click here to enter text. 4. True or False? Most lightning strikes remain within the cloud. 5. Does a lightning strike that hits the ground travel from the cloud to the ground or from the ground to the cloud? Click here to enter text. 6. What is heat lightning and does it really exist? Click here to enter text. 3
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7. What causes the sound of thunder? Click here to enter text. The following map shows the flash density of cloud to ground lightning strikes over a 5
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This note was uploaded on 03/30/2012 for the course SCE 1257 taught by Professor Smith during the Spring '12 term at ECCD.

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lab 10 - Name Chris Regan Lab 11 Severe Storms Objective...

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