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Transcript of Brandon Weisman Political Science and Business College of Arts and Sciences and Fisher School of...
Brandon WeismanPolitical Science and Business
College of Arts and Sciences and Fisher School of Business
April Showers Don’t Always Bring May
Flowers:A Look at the Super
Outbreak of April 25th-28th, 2011
Wind shear- change in wind speed and direction as you go up in atmosphere (horizontal)
Tremendous updrift (vertical)- Veering winds (storm rotation)Hint of olive oil
and nature’s fury
Formation and Ingredients
Helicity- fluid flow in atmosphere, predict tornadic development - Storm Relative Helicity (SRH) 450-600
Enhanced Fujita (EF) Scale- based on damage (subjective) of tornado with connection to wind speed F1 (weak) F2 (strong) F3 (severe) F4 (devastating) F5 (incredible)
Key Tornadic Measurements
Dr. Fujita spanking a misbehaved tornado
Development of upper-level trough (low pressure system)
Powerful jet stream propelled trough strong wind shear
- move Northeastern into Ohio and Tennessee Valleys
Storm Prediction Center (SPC) issued moderate risk for severe weather for 3 consec. days
Leading up to the Superstorm
Largest, deadliest, and most destructive outbreak in U.S. history
358 confirmedStruck 21 states
348 fatalitiesTotal damages:
$11 billion
April 25th-28th, 2011
April 25 April 26Supercell near Little
Rock and surrounding Arkansas area
Severe flooding all over country
Tornadoes still in south
Mostly weakSevere
thunderstorms in Northeast and Midwest
Cold front with multiple low pressure systems Thunderstorms morphed into Squall Lines- low pressure
areas/line of thunderstorms before or during cold front 15 violent tornadoes - rated EF-4 or higher (4 EF-5’s - Alabama hit the hardest
April 27
Tornadoes along coast from Florida to New York
Widespread flooding in Midwest, South, and Eastern Seaboard
Last tornadoes touched down were weakSystem moved out into Atlantic
April 28
Wind shear, updrift, and veering winds contribute to formation of tornadoes
EF ScaleApril 25th-28th, 2011 deadliest outbreak in
history in terms of mortality and damage
Takeaways
http://www.fastcompany.com/1755314/weather-phenomena-causing-2011s-tornado-explosion
http://www.universetoday.com/71983/how-are-tornadoes-formed/
http://www.ustornadoes.com/2012/04/25/april-25-26-27-28-2011-super-outbreak/
http://www.srh.noaa.gov/mob/?n=20110427_tor
http://www.washingtonpost.com/blogs/capital-weather-gang/post/super-tornado-outbreak-of-april-27-2011-one-year-anniversary/2012/04/27/gIQARRLJlT_blog.html
http://www.theweathernetwork.com/news/articles/deadly-tornado-outbreak-april-25-28-2011/25988/
Soruces
http://www.fastcompany.com/1755314/weather-phenomena-causing-2011s-tornado-explosion
http://sky7weather.wordpress.com/2012/04/26/looking-back-at-april-27-2011-the-day-before-the-disaster-thursday-update-438-pm/
http://www.ustornadoes.com/2012/04/25/april-25-26-27-28-2011-super-outbreak/
http://4playernetwork.com/blog/2013/02/ps4-being-released-this-year-wsj/
http://www.bing.com/images/search?q=dr+theodore+fujita&FORM=HDRSC2#view=detail&id=DE125D905B77968B2154B330A5209860F24BA26E&selectedIndex=6
https://www.youtube.com/watch?v=mPcUDIXX2G4
https://www.youtube.com/watch?v=V4a35U3VU1w
http://chartdiagram.com/ http://en.ria.ru/infographics/20110802/16027
5534.html http://www.fema.gov/media-library-data/2013
0726-1827-25045-2783/tornado_mat_frontmatter_508.pdf
http://www.timesfreepress.com/news/2012/apr/22/one-year-after-april-27-tornadoes-most-are-healing/
http://www.peachpundit.com/2012/04/27/april-27th-one-year-later/
http://www.ustornadoes.com/2014/08/08/intothestorm-10-best-and-worst-moments-for-a-tornado-geek/
Images/Videos