The History Structure Development and Destruction Source httpwwwdcpeachnetedupgorestudentsw97mathesonhpagehtm What is a hurricane Violent cyclonic storm that develops in the tropical region ID: 483760
Download Presentation The PPT/PDF document "HURRICANES" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Slide1
HURRICANES
The History, Structure, Development, and Destruction
Source: http://www.dc.peachnet.edu/~pgore/students/w97/matheson/hpage.htmSlide2
What is a hurricane?
Violent cyclonic storm that develops in the tropical regionWind speeds are > 74 mph
Source: http://earthobservatory.nasa.gov/
Newsroom/NewImages/images.php3?img_id=680Slide3
Rotation and PressureIn which direction does a hurricane rotate?
COUNTERCLOCKWISEIs the barometric pressure inside the hurricane high or low?
LOWSlide4
When is Hurricane Season?June 1
st through November
31stSlide5
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 publicSlide6
Watch vs. WarningWhat is the difference between a Hurricane Watch and a Hurricane Warning?
Watch – Tropical storm poses a threat to coastal areas with 36 hoursWarning - Tropical storm conditions are expected in a coastal area within 24 hoursSlide7
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.htmlSlide8
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.rxmlSlide9
Hurricane Anatomy
Source: http://hurricanes.noaa.gov/prepare/structure.htmSlide10
Another look at the Structure
Source: http://hurricanes.noaa.gov/prepare/structure.htmSlide11
Comparison of TermsTropical 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 mphSlide12
Comparison of Terms
Tropical Storm Shower and thunderstorm moves over closed circulation, winds greater than 39 mph
Hurricane Eye is developed, winds > 74 mphSlide13
Compare the Following
Source: http://ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/hurr/stages/home.rxmlSlide14
By what two factors is hurricane strength measured?
Wind SpeedBarometric PressureSlide15
What is the Scale Used to Categorize Hurricanes?
Saffir-Simpson Scale
Category
Max Wind Speed
(mph)
Min. Surface Pressure (mb)
Storm Surge m (ft)
1
74-96
> 980
1-1.7 (3-5)
2
97-111
979-965
1.8-2.6 (6-8)
3
112-131
964-945
2.7-3.8 (9-12)
4
132-155
944-920
3.9-5.6 (13-18)
5
> 155
< 920
> 5.7 (>19)
Source: http://kids.earth.nasa.gov/archive/hurricane/saffir-simpson.htmlSlide16
What causes the damage in a hurricane?Winds
FloodingStorm SurgeSlide17
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.jpgSlide18
What destroys a hurricane?Strong vertical windsCold water
Movement over landFrictionLack of moistureSlide19
What are the five costliest hurricanes in the United States?
Hurricane Andrew – 1992Hurricane Hugo – 1989Hurricane Fran – 1996
Hurricane Opal – 1995Hurricane Frederic - 1979Slide20
Explain why the majority of the costliest storms are relatively recent
Damage is a result of developmentThere are more developed areas and possessions than in the past
Source: http://www.nhc.noaa.gov/1992andrew.htmlSlide21
What are the five deadliest hurricanes in the United States?
Galveston – 1900Southeast Florida – 1928Florida Keys – 1919
New England – 1938Florida Keys – 1935Slide22
Explain why the deadliest storms were longer ago.
Lack of instrumentation to predict and track stormsPeople were not warned of the incoming danger
Source: http://www.1900storm.com/photographs/photo10.html
Results of the Galveston HurricaneSlide23
What are the names of the 2002 Hurricanes?
Arthur
Hanna
Omar
Bertha
Isidore
Paloma
Cristobal
Josephine
Rene
Dolly
Kyle
Sally
Edouard
Lili
Teddy
Fay
Marco
Vicky
Gustav
Nana
Wilfred
Source: http://www.hurricanewarning.net/coordinates.htmlSlide24
How has a hurricane affected you personally?Damage to your house from wind?
Damage from flooding?Destroyed vacation house?Damage to family members’ homes?Slide25
http://
cindi.usgs.gov/cindi/hazard/event/floyd/ncflood/mediums/img023.jpg
Final Water Level
Flooding of Tar River as result of
Hurricanes Dennis and Floyd
Dockside
Tar River
EstatesSlide26
Damage to Greenville, NC
Extensive Flooding
Extended Power outages
Flood Related Deaths
Property Damage
US 264 Bridge
Source: http://cindi.usgs.gov/cindi
/hazard/event/floyd/ncflood/
mediums/img022.jpgSlide27
Damage to Greenville, NC
Source: http://www.guc.com/about/floyd.htmSlide28
ProtectionListen to warningsTake all warnings seriously
Follow evacuationsPrepare Food and Water for extensive power outagesSlide29
Source: http://www.dc.peachnet.edu/~pgore/students/w97/matheson/hpage.htm
THE END