Table of Contents Formation of Precipitation 3
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- Homework Assignment 2
- Tropical Storms and Hurricanes
TornadoRapidly whirling, funneled-shaped cloud (called a vortex) that reaches down from a storm cloud to touch Earth’s surface. Since air is invisible, the vortex that we see is water droplets, dust, and debris sucked up from the ground. Caution: Take shelter in a basement or in the center of a building immediately when tornado warnings are issued for your area. Stay away from windows. Usually brief, touching the ground approximately 15 minutes or less Wind speeds may reach 480 km/hr (230 mph) 
Counterclockwise in both the Northern and Southern Hemispheres Stages of Tornado Formation: Overshooting top Wall cloud descends below base of cloud and slowly rotates Funnel cloud descends from wall cloud Funnel cloud touches ground Tornado Watch – tornadoes are possibly in your area Tornado Warning – tornadoes have been seen in the sky or on weather radar Occur most often in the US Approx. 800 tornadoes a year Tornado Alley - Warm humid air mass moves north from Gulf of Mexico and meets a cold dry mass that is moving south from Canada; SD, Iowa, Nebraska, Kansas, Missouri, Oklahoma, TX, NM, and Arkansas Enhanced Fujita Scale- Measuring intensities of tornadoes based on a scale developed by Dr. Theodore Fujita at the University of Chicago in the 1960s EF0 Gale 65-85mph EF1 Weak 86-110 mph EF2 Strong 111-135 mph EF3 Severe 136-185mph EF4 Devastating 186-200 mph EF5 Incredible over 200 mph The deadliest tornado on record in the United States was the tri-state tornado outbreak of March 18, 1925. Several tornadoes demolished portions of Missouri, Illinois, and Indiana, killing 747 people and injuring over 2000 more. Homework Assignment #2What should you do if you’re caught outside during a lightning storm? Why do you see lightning before you hear thunder? What is the difference between a severe thunderstorm watch and a severe thunderstorm warning? In what direction do tornadoes spin in NJ? What is the difference between a tornado watch and a tornado warning? Where is tornado valley? Tropical Storms and HurricanesTropical storms form over warm ocean waters. They begin as a tropical disturbance which is nothing more than a cluster of big thunderstorms. When this growing storm begins to rotate, it becomes a tropical depression. When wind speeds reach 40 miles per hour it is called a tropical storm. Hurricanes are tropical storms that have winds of 119 km/hr Usually occur between June and November in the eastern US Hurricanes that occur in western US are called typhoons. Size can be 220-700 km in diameter Eye – center of a hurricane Storm Surge - Hurricane pulls up ocean water an average of 1 cm per 1 mb of air pressure drop; Regions along shores and coasts are inundated with water being pushed ahead of the hurricane 
Stages of Hurricane Development: Tropical Disturbance Mass of thunderstorms begin to organize Light wind circulation Tropical Depression Wind speed 20-34 knots Central low pressure developing with rotation of thunderstorms Tropical Storm 35-64 knots Strong central low pressure Increasing wind speeds Forward movement across oceans Hurricane 64 knots or more Well developed central low pressure; eye may be visible Moving to west along with global winds (NE or SE Trades) Can move up to 50 knots over open ocean Highest wind speed on the forward traveling side Saffir Simpson Scale – measures hurricane intensity by comparing wind speed and air pressure Tropical Storm – 39-73 mph winds Category 1 – 74-95 mph Category 2 – 96-110 mph Category 3 – 111-130 mph Category 4 – 131-155 mph Category 5 – 156 mph and up Naming Hurricanes: Initial tracking of hurricane was by latitude and longitude WWII – use of military terms to identify individual hurricanes (Alpha, Bravo, Tango…) Early 1950s – use of female names Late 1970s – Male and female names are used; alternate male/female name for Pacific or Atlantic hurricanes Directory: cms -> lib6 -> NJ01001533 -> Centricity -> Domain lib6 -> Unit 6: Branding & Licensing lib6 -> Unit 11: Sports & Entertainment Communications lib6 -> Sports & Entertainment Marketing Unit Two Outline, 2014-15 School Year lib6 -> Aeneid, Book VI english and Latin Translation Passages (English by A. S. Klein) Lines 1-55, the Temple at Cumae lib6 -> The Seminar Gazette lib6 -> Tour begins at: 6pm at Somerset Borough Building 340 West Union Street Somerset, Pa 15501 Domain -> Name Period Date Domain -> Berlin Conference Activity Domain -> Art history review name of the era Download 0.49 Mb. Share with your friends:
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