PPT-Thunderstorms, Tornadoes, and Hurricanes

October 2728 2010 Extreme Weather Hurricane Ivan over Gulf Sept 2004 Source NOAA Definitions Climate Change Changes in climate of the past present or future associated with natural . A. Humidity. amt. of water vapor in air.. Warm air can hold more water vapor than cool air.. Relative Humidity- . percentage of water vapor that is actually in the air compared to the maximum amt. of water vapor the air can hold at a particular temp.. Dr. . Hooda. Text Book : Pages 450 - 459. What is a storm? . A violent disturbance in the atmosphere.. What is a storm? . . Involves sudden changes in air pressure. Cause rapid air movement. Conditions that bring one . A Scientastic presentation. Storm Chaser’s Cli. p. http://. www.discovery.com/tv-shows/storm-chasers/videos/what-is-the-dominator.htm. . Discussion Question – . Severe Thunderstorms. C. apable . By: Maggie Colf. Tornadoes. “There is also disagreement as to whether separate touchdowns of the same funnel constitute separate tornado.”. Tornadoes may not have a visible funnel.. Truth is that we don’t fully understand.. 11/16/15. Winds can exceed 300 mph!!!. Around 1,000 occur on average each year in the U.S.. Kill 80, injure 1,500 people each year on average. Can have a path up to a mile wide!!!. Can occur any time of the year, but . WHAT DO HURRICANES AND TORNADOES HAVE IN COMMON?. Low Pressure . Strong Winds . Hazardous to Life and Property . HOW DO THEY DIFFER?. Location . Size . Duration . Season of Occurrence . Distinctive Hazards. Science. Thunderstorms & Lightning. Conditions That Occur During Thunderstorms. Thunder, lighting, high winds, heavy rain, hail. Electric Sparks by Shuffling . Lightening is like electric sparks that you can make by shuffling across a carpet before touching a metal object. Both lightning and small electric sparks are discharges of built up static electricity. . U.S averages 800 tornadoes/year; more than any country. Canton, MI Dec. 23, 2015. EF-1 (90 mph winds). .  .                              . 933. . tornadoes in . 2016. They have strong winds, heavy rain, lightning, and thunder.. How to tell if a storm is far away:. If you hear the thunder at the same time as you see the lightning, the storm is right above you.. If you see the lightning and then hear the thunder, the storm is farther away from you.. A tornado is a rotating column of air attached to a thunderstorm that comes in contact with the . ground.. The most violent of all atmospheric events is the tornado.. On average, 800 to 1000 tornadoes occur in the U.S. each year.. Be able to describe . how . and why a . TORNADO. forms, and the role of the . MESOCYCLONE. in formation.. Be able to identify the . THREE. main . TYPES. of tornadoes and the key tornado formation . Storms and Atmospheric Disturbances. Embedded within the wind belts of the general atmospheric . circulation are . secondary circulations. , . which are made up of . storms. and other . atmospheric disturbances. Catastrophic events. Before we can see how they affect ecosystems we need to understand how they form. HURRICANES. How do Hurricanes Form? . Stage 1: A Tropical Disturbance Forms. Most Atlantic hurricanes begin life as organized clusters of thunderstorms off the west coast of Africa. These thunderstorms form along waves in the prevailing trade winds. The waves, called easterly waves, can be more than 2500 km (1550 mi) long. The cluster of thunderstorms is called a tropical disturbance.. Flood . – any relatively high stream flow overtopping the natural or artificial banks in a water system.. Common Causes:. Long-lasting rainfall over a broad area. Locally intense thunderstorm - generated rainfall.