Warm-Up 1. If you were told that there was a chance that your home would be destroyed by a large storm (but you’ve been told this before). Would you evacuate and leave your life behind you, or take the risk and stay? EXPLAIN in at least 2 sentences 2. What type of air pressure system is associated with high precipitation and stormy weather?

Objective Agenda SWBAT describe the formation of severe weather Daily Question: What factors lead to the development of a cyclonic system? 1. Warm-Up 2. Objective / DQ 3. Quick Review 4. Tuscaloosa, AL tornado 5. Hurricane Katrina 6. Hurricane/Tornado search 7. STORM CHASERS 8. RAGING PLANET 9. Exit Ticket 8.4 – Cyclonic Systems

Announcements Unit 8 Test – Wednesday, May 20 Final Exam Schedule:  First Block – June 1  Second Block – June 2  Third Block – June 3  Fourth Block – June 4

8.1 Review 1. What produces weather? 2. What are the four layers of the atmosphere? 3. What layer of the atmosphere is the coldest? 4. What layer of the atmosphere is the ozone located in? 5. What layer of the atmosphere do satellites orbit in? 6. What layer of the atmosphere does weather occur?

8.1 Review 1. What produces weather? Earth’s motion and heat from the sun 2. What are the four layers of the atmosphere? Thermosphere, mesosphere, stratosphere and troposphere 3. What layer of the atmosphere is the coldest? Mesosphere 4. What layer of the atmosphere is the ozone located in? Stratosphere 5. What layer of the atmosphere do satellites orbit in? Thermosphere 6. What layer of the atmosphere does weather occur? Troposphere

8.2 Review 1. What is air pressure measured in? 2. What do isobars show on air pressure maps? 3. What directions do winds blow based on pressure? 4. What is humidity?

5. What does each black line represent? 6. What type of weather would you expect in eastern Kansas? 7. Which way would the wind be blowing in eastern Kansas?

8.2 Review 1. What is air pressure measured in? Millibars (mb) 2. What do isobars show on air pressure maps? Places with equal air pressure 3. What directions do winds blow based on pressure? High pressure to low pressure 4. What is humidity? The amount of water vapor in the air 5. What does each black line represent? Isobar (shows equal pressure along the line) 6. What type of weather would you expect to see in eastern Kansas? Precipitation (area of low pressure) 7. Which way would the wind be spinning in eastern Kansas? Counterclockwise (area of low pressure)

8.3 Review 1. What three things are needed to make a cloud? 2. What causes air that forms clouds to move up? 3. What are the three types of clouds? 4. What are the six air masses? 5. What are the four fronts?

8.3 Review 1. What three things are needed to make a cloud? Water vapor/humidity, temperature difference, condensation nuclei 2. What causes air that forms clouds to move up? Convergence, frontal wedging, orographic lifting 3. What are the three types of clouds? Cumulus, Stratus, Cirrus 4. What are the six air masses? cP, cT, cA, mP, mT, mA 5. What are the four fronts? Warm, Cold, Stationary, Occluded

10 minutes to track Charlotte’s weather Bit.ly/1czZ53x (Get info from this site) DateTime of Sunrise & Sunset TemperatureAir PressureRelative Humidity Wind Direction & Speed Dew Point Weather (Sky Conditions)

Tuscaloosa, AL Tornado April 27, 2011

Hurricane Katrina Damage

HURRICANE KATRINA… 9.5 years later e_katrina_nine_years_l.html e_katrina_nine_years_l.html

Hurricane and Tornado SEARCH Textbook pages – everything can be found within these pages. As you go, consider similarities and differences between the 2 storms

CYCLONIC SYSTEM What is it? How does the storm develop? How often does this storm occur? What is the intensity ranking? Associated with High or Low Pressure? Tornadoes Hurricanes

Comparing & Contrasting Cyclonic Systems With your elbow partner (person to your right or left), complete a VENN DIAGRAM on hurricanes and tornadoes Each group will be responsible for coming up and writing one thing for the class consensus Venn Diagram on the board  At least 2 points comparing the two systems  At least 4 points on their differences.  Consider:  Speed  Greatest damage  Location of formation  Time of formation/predictability

Hurricanes Tornadoes

Hurricanes - Form over warm water - Greatest damage comes from storm surges and flooding - Lose speed over land - Predictable - Big, but slow Tornadoes - Form over land usually - Greatest damage comes from winds - Sometimes only last seconds - Very unpredictable and fast Spinning systems of low pressure High speed winds

What is a Tornado?

How Do Tornadoes Form? Warm, humid air collides with cold, dry air The warm air rises up through the cold air creating an updraft because of a LOW PRESSURE SYSTEM If this updraft begins spinning, it can turn into a tornado

Wait…how exactly does it form?  Animation

Damage Caused by Tornadoes Extremely high winds can tear buildings apart, slip cars, and even suck the water out of a riverbed

STORM CHASERS VIDEO 2 storm chasers tell their story about getting caught in a tornado

Checkpoint #1 1. What type of pressure systems are tornadoes associated with? 2. What causes the most damage during a tornado? 3. What is the intensity ranking for tornadoes?

Checkpoint #1 1. What type of pressure systems are tornadoes associated with? LOW 2. What causes the most damage during a tornado? Winds 3. What is the intensity ranking for tornadoes? Fujita tornado intensity scale

Hurricane

How Do Hurricanes Form? Water temperatures must be warm enough to provide necessary heat and moisture. Disorganized cloud and thunderstorms form from LOW PRESSURE SYSTEMS. An inward rush of warm, moist surface air moves towards the center of the storm. Air then turns upward and rises. Eye: center of the storm where precipitation ceases and winds decrease.

Wait…how exactly does it form?

Damage Caused by Hurricanes Most from the storm surge and flooding!!

Raging Planet: Hurricanes 10:35-19:00 25:46-31:15 Storm Chasers, Take 2! Answer the questions and fill in the blanks on the worksheet provided while you watch

Checkpoint #2 1. What produces the most damage during a hurricane? 2. What must be true of ocean temperatures in order for a strong hurricane to form? 3. What is the intensity ranking scale for hurricanes? 4. What happens when a hurricane hits land? 5. What is the eye of the hurricane and what are the winds like IN the eye of the storm?

Checkpoint #2 1. What produces the most damage during a hurricane? Storm surge and flooding 2. What must be true of ocean temperatures in order for a strong hurricane to form? Warm enough to provide necessary heat and moisture 3. What is the intensity ranking scale for hurricanes? Saffir-Simpson Hurricane Scale 4. What happens when a hurricane hits land? Strong winds and extensive flooding can cause billions of dollars of damage and loss of life. 5. What is the eye of the hurricane and what are the winds like IN the eye of the storm? Very center of the storm where precipitation ceases and winds are calm. The air descends and heats by compression, making this the warmest part of the storm

1. What type of air pressure system is associated with hurricanes and tornadoes? a) High pressure systems b) Low pressure systems 2. What is the intensity ranking scale for hurricanes? a) Fujita Scale b) Saffir-Simpson Scale c) Cyclone Scale d) Wind speed Scale 3. What is a key difference between tornadoes and hurricanes? a) Tornadoes form over land and hurricanes form over water b) Hurricanes are unpredictable and tornadoes are predictable c) Tornadoes greatest damage comes from storm surges and floods and hurricanes greatest damage comes from high wind speeds. d) Hurricanes form from high pressure systems and tornadoes form from low pressure systems 4. What produces the most damage during a hurricane? a) High wind speeds b) Heavy rainfall and storm surges c) Collapsing buildings d) The trembling ground 5. What produces the most damage during a tornado? a) High wind speeds b) Heavy rainfall and storm surges c) Collapsing buildings d) The trembling ground