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# Tornados, hurricanes and global weather

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• Ef-1 video from WHNT of Leighton Tornado hitting a parking lot
• EF-3 video from Youtube of an EF-3 tornado hitting an apartment complex in Montgomery
• EF-3 video from Youtube of an EF-3 tornado hitting an apartment complex in Montgomery
• ### Tornados, hurricanes and global weather

1. 1. Tornadoes, Hurricanes, and Global Weather Mr. Jason Simpson
2. 2. What is SCALE? Measurement A Thing on a Fish An Action SCALE is related to the ____ of an object AND the ____ it is active or is occurring. TIME SIZE
3. 3. METEOROLOGY: The study of the atmosphere and the weather that happens in it. Microscale There are FOUR scales of measurement in meteorology. They include a SPACE and a TIME. Mesoscale Synoptic Global
4. 4. Comparing and Contrasting “Cyclones!” “ Cyclones” are areas of low pressure. Air pressure is a _____. Air is made up of tiny _________ that move up, down, and side-to-side in the atmosphere. Microscale Synoptic FORCE PARTICLES
5. 5. Comparing and Contrasting “Cyclones!” Low Pressure (rising air) High Pressure (sinking air) The Wind! (horizontal) Cylones (lows) rotate counter-clockwise.
6. 6. A tornado’s wind can range from 65 to over 250 miles per hour! The ________ ______ Scale rates a tornado’s strength based on the damage it does. ENHANCED FUJITA EF-0 (65-85 MPH) EF-1 (86-110 MPH) EF-2 (111-135 MPH) EF-3 (136-165 MPH) EF-4 (166-200 MPH) EF-5 (Over 200 MPH)
7. 7. EF-1 Tornado Leighton, AL
8. 8. EF-3 Prattville, AL
9. 9. FOUR (2 in 1974, 1 in 1977, 1 in 1998) How many EF-5 tornadoes has Alabama recorded? EF-5 Damage 1998 1977 LINK LINK April 8
10. 10. Tornadoes form from individual _____________. THUNDERSTORMS Radar Image Cumulonimbus Cloud View underneath a cumulonimbus into a “wall cloud.” Do you see a tornado here? Tornadoes are ___________ events because they are small and do not last very long. MICROSCALE
11. 11. Individual Thunderstorms and Tornadoes are tracked by a RADAR. How Radar Works O Doppler Radar detects precipitation, and it can determine if the rain, hail, or snow is moving TOWARD or AWAY FROM the radar site!
12. 12. Hurricanes range from a few hundred to a few thousand miles wide! They are _______ scale events. SYNOPTIC USA TODAY Saffir-Simpson Scale Satellite Animation of Hurricane Katrina (2005) A hurricane’s wind ranges from 74 to over 200 miles per hour. The _____________ scale describes a hurricane’s strength by wind AND ____________. SAFFIR-SIMPSON STORM SURGE
13. 13. Hurricanes are storm _______. SYSTEMS Radar Image Close-Up Satellite Loop of Hurricane Igor (2010) The center of a hurricane is called the ____. The weather is ____ in this area. EYE CALM
14. 14. What’s the Difference? Tornado Hurricane - One Thunderstorm - Small Size - Short Life - Usually stronger on LAND - Strength is in the wind - System of thunderstorms - Large Size - Long Life - Strong over WATER - Strength is in the wind AND water (storm surge) - Tornadoes are a part of a storm, they do not CREATE storms. - Hurricanes are made of storms and can CREATE tornadoes!
15. 15. What is This Thing? Waterspouts are tornadoes on water!
16. 16. The GLOBAL Picture The ___ ______ is a global scale weather feature. It is a river of ___ that moves storm systems. JET STREAM AIR
17. 17. The GLOBAL Picture WESTERLIES EASTERLIES Hurricanes form in the _____________. Alabama is often in this band of wind in the Summer and early Fall. Alabama is usually in the ____________. That is where most severe storms and tornadoes occur.
18. 18. The GLOBAL Picture Global circulation begins with the ___! Uneven heat on Earth’s surface causes air to move. Moving air is called ______. SUN WIND
19. 19. The GLOBAL Picture The westerlies bring a clash of air masses where _______ form. FRONTS An unstable, warm air mass, changing winds, and thunderstorms are where tornadoes usually come from.
20. 20. The GLOBAL Picture Hurricanes form in the __________ (Trade Winds). EASTERLIES This band of wind moves north toward Alabama in Summer and early Fall.
21. 21. The GLOBAL Picture The atmosphere’s mission is to bring _____________. EQUILIBRIUM This is why we have STORMS!
22. 22. The GLOBAL Picture Hurricanes transport _____ air from the tropics toward the poles. WARM
23. 23. The GLOBAL Picture Thunderstorms transport warm air near the surface high into the very cold atmosphere above. The surface is ________, and the air high above the surface is __________. COOLED WARMED
24. 24. QUESTIONS?