1 / 19

HURRICANES

HURRICANES. Source: http://www.dc.peachnet.edu/~pgore/students/w97/matheson/hpage.htm. What is a hurricane?. Violent cyclonic storm that develops in the tropical region Wind speeds are > 74 mph. Source: http://earthobservatory.nasa.gov/ Newsroom/NewImages/images.php3?img_id=680.

janeeva
Download Presentation

HURRICANES

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. HURRICANES Source: http://www.dc.peachnet.edu/~pgore/students/w97/matheson/hpage.htm

  2. What is a hurricane? • Violent cyclonic storm that develops in the tropical region • Wind speeds are > 74 mph Source: http://earthobservatory.nasa.gov/ Newsroom/NewImages/images.php3?img_id=680

  3. Rotation and Pressure In which direction does a hurricane rotate? COUNTERCLOCKWISE Is the barometric pressure inside the hurricane high or low? LOW

  4. What is the role of the National Weather Service during hurricane season? • Provides weather information, such as data from satellites • Responsible for issuing watches and warnings to the media and general public

  5. Watch vs. Warning • What is the difference between a Hurricane Watch and a Hurricane Warning? • Watch – Tropical storm poses a threat to coastal areas with 36 hours • Warning - Tropical storm conditions are expected in a coastal area within 24 hours

  6. What conditions must be present for a hurricane to develop? • Warm ocean temperatures (>80˚ F) up to 60m deep • Little to no wind shear • Low pressure system at least 5˚ North or South of Equator • Rotation caused by winds Source: http://lwf.ncdc.noaa. gov/oa/reports/fran/fran.html

  7. What is the major source of energy fueling a hurricane? Heat Energy evaporating from the ocean surface Source: http://ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/hyd/evap.rxml

  8. Hurricane Anatomy Source: http://hurricanes.noaa.gov/prepare/structure.htm

  9. Another look at the Structure Source: http://hurricanes.noaa.gov/prepare/structure.htm

  10. Comparison of Terms • Tropical Disturbance Group of thunderstorms in the tropics that are present for at least 24 hours • Tropical Wave lack of circulation, winds <25 mph and every direction • Tropical Depression closed circulation but disorganized, winds at least 25 mph

  11. Comparison of Terms Tropical Storm Shower and thunderstorm moves over closed circulation, winds greater than 39 mph Hurricane Eye is developed, winds > 74 mph

  12. What is the Scale Used to Categorize Hurricanes? Saffir-Simpson Scale Source: http://kids.earth.nasa.gov/archive/hurricane/saffir-simpson.html

  13. What causes the damage in a hurricane? • Winds • Flooding • Storm Surge

  14. What is a storm surge? • Large wall or dome of water that rushes into the coastline as a result of a hurricane making landfall • To the right are the areas affected by high storm surges Souce: http://www.wkrg.com/hurricanecenter/surge/SE.jpg

  15. What destroys a hurricane? • Strong vertical winds • Cold water • Movement over land • Friction • Lack of moisture

  16. What are the five deadliest hurricanes in the United States? • Galveston – 1900 • Southeast Florida – 1928 • Florida Keys – 1919 • New England – 1938 • Florida Keys – 1935

  17. Explain why the deadliest storms were longer ago. • Lack of instrumentation to predict and track storms • People were not warned of the incoming danger Results of the Galveston Hurricane Source: http://www.1900storm.com/photographs/photo10.html

  18. Protection • Listen to warnings • Take all warnings seriously • Follow evacuations • Prepare Food and Water for extensive power outages

  19. THE END Source: http://www.dc.peachnet.edu/~pgore/students/w97/matheson/hpage.htm

More Related