1. L 26 Tornadoes Created by Karen Duong Oct 2012

2. Tornadoes http://video.nationalgeographic.com/video/e nvironment/environment-natural- disasters/tornadoes/tornadoes-101/ http://video.nationalgeographic.com/video/e nvironment/environment-natural- disasters/tornadoes/tornadoes-101/

3. L26Tornadoes What does a tornado look like? What is a tornado? A tornado is a violent, rotating column of air stretching from a cloud to the ground. Weather conditions needed to form tornadoes: Warm, humid air mass meets cold, dry air mass Cold air moves under the warm air, forcing it to rise What do we call a tornado that forms over water? Waterspouts

4. Tornadoes What makes them dangerous? Strong winds and flying debris Tornado Watch: tornadoes are possible in your area Tornado Warning: tornado has been seen in the sky or on radar Safety: basement, bathroom, under heavy furniture, away from windows, or lie flat in a ditch

5. Hurricanes

6. http://youtu.be/k35Gwb0FFU0

7. Hurricanes What is a hurricane: – Large rotating tropical weather system How are they formed? – When wind traveling in two different directions meet – Over warm ocean water – Energy comes from condensation of water vapor evaporating from ocean

8. Hurricanes What makes them dangerous? – Storm surges: A dome of water sweeps across the coast – Heavy rain = floods – Wind Safety: – Evacuate area – Cover windows with plywood – Stay indoors

9. Hurricanes http://video.nationalgeographic.com/video/e nvironment/environment-natural- disasters/hurricanes/katrina-formation/ http://video.nationalgeographic.com/video/e nvironment/environment-natural- disasters/hurricanes/katrina-formation/

10. Videos http://www.watchknowlearn.org/Video.aspx? VideoID=3483&CategoryID=771 http://www.watchknowlearn.org/Video.aspx? VideoID=3483&CategoryID=771 http://video.nationalgeographic.com/video/e nvironment/environment-natural- disasters/tornadoes/water-spouts/ http://video.nationalgeographic.com/video/e nvironment/environment-natural- disasters/tornadoes/water-spouts/

11. L 26 E.O.P Review: 1.List 4 types of air masses. 2. What does it mean if an air mass is warm and humid? 3.List the 4 types of fronts. 4.Which front can bring weird weather (an example would be hail)?

12. 1.List 4 types of air masses. a)Maritime b)Continental c)Polar d)Tropical 2. What does it mean if an air mass is warm and humid? a)Maritime Tropical: near equator and over water 3.List the 4 types of fronts. a)Cold b)Warm c)Stationary d)Occluded 4.Which front can bring weird weather (an example would be hail)? What is happening to the air masses? a)Occluded: warm front trapped between two cold fronts

13. E.O.P How are tornadoes formed? – What makes them so dangerous? How are hurricanes formed? – What makes them so dangerous?