Weather Ready Nation: a Vital Conversation on Tornadoes and Severe Weather
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Community at the Center of the Storm | 87
ABSTRACT This article is based on a Community at the keynote presentation delivered at the Alabama Poverty Project Lifetime of Learning Summit at the University of Center of the Storm Montevallo on September 30, 2011. Conference organizers asked for the Marybeth Lima perspective of a survivor of a significant natural disaster, for information Before hurricane Katrina, I was steady and regarding Louisiana’s recovery from confident in my job as an associate professor in the hurricanes Katrina and Rita in the short- department of biological & agricultural engineering at and long-term, and for advice on re- LSU. I had been doing service-learning since 1998, building and recovery within the and I worked very closely with the staff from the framework of poverty eradication. This Center for Community Engagement, Learning and paper details the author’s experiences in Leadership, or CCELL. In working closely with CCELL and with my community, I had developed the LSU the 2005 hurricanes and lessons learned Community Playground Project. through subsequent community- I teach a required, first-year biological engagement efforts. engineering design course in which my students partner with local public elementary schools to work with the true experts at play, the children at the schools, to develop dream playground designs at those schools. My class consists of two to three sections of students, and each section is assigned a separate public school. College students work collaboratively in teams of three to four people with the elementary school students, teachers, and school administrators, and sometimes parents or school improvement teams, to develop playground designs. -
Observations and Laboratory Simulations of Tornadoes in Complex Topographical Regions Christopher D
Iowa State University Capstones, Theses and Graduate Theses and Dissertations Dissertations 2012 Observations and Laboratory Simulations of Tornadoes in Complex Topographical Regions Christopher D. Karstens Iowa State University Follow this and additional works at: https://lib.dr.iastate.edu/etd Part of the Atmospheric Sciences Commons, and the Meteorology Commons Recommended Citation Karstens, Christopher D., "Observations and Laboratory Simulations of Tornadoes in Complex Topographical Regions" (2012). Graduate Theses and Dissertations. 12778. https://lib.dr.iastate.edu/etd/12778 This Dissertation is brought to you for free and open access by the Iowa State University Capstones, Theses and Dissertations at Iowa State University Digital Repository. It has been accepted for inclusion in Graduate Theses and Dissertations by an authorized administrator of Iowa State University Digital Repository. For more information, please contact [email protected]. Observations and laboratory simulations of tornadoes in complex topographical regions by Christopher Daniel Karstens A dissertation submitted to the graduate faculty in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY Major: Meteorology Program of Study Committee: William A. Gallus, Jr., Major Professor Partha P. Sarkar Bruce D. Lee Catherine A. Finley Raymond W. Arritt Xiaoqing Wu Iowa State University Ames, Iowa 2012 Copyright © Christopher Daniel Karstens, 2012. All rights reserved. ii TABLE OF CONTENTS LIST OF FIGURES .............................................................................................. -
The Year That Shook the Rich: a Review of Natural Disasters in 2011
THE YEAR THAT SHOOK THE RICH: A REVIEW OF NATURAL DISASTERS IN 2011 The Brookings Institution – London School of Economics Project on Internal Displacement March 2012 Design: [email protected] Cover photo: © Thinkstock.com Back cover photos: left / © Awcnz62 | Dreamstime.com; right / © IOM 2011 - MPK0622 (Photo: Chris Lom) THE YEAR THAT SHOOK THE RICH: A REVIEW OF NATURAL DISASTERS IN 2011 By Elizabeth Ferris and Daniel Petz March 2012 PUBLISHED BY: THE BROOKINGS INSTITUTION – LONDON SCHOOL OF ECONOMICS PROJECT ON INTERNAL DISPLACEMENT Bangkok, Thailand — Severe monsoon floods, starting in late July 2011, affected millions of people. A truck with passengers aboard drives through a heavily flooded street. Photo: UN/Mark Garten TABLE OF CONTENTS Acronyms ................................................................................................................................. vi Foreword ................................................................................................................................. ix Executive Summary ................................................................................................................. xi Introduction .............................................................................................................................. xv Chapter 1 The Year that Shook the Rich ...................................................... 1 Section 1 Disasters in the “Rich” World, Some Numbers ............................................ 5 Section 2 Japan: The Most Expensive Disaster -
A Background Investigation of Tornado Activity Across the Southern Cumberland Plateau Terrain System of Northeastern Alabama
DECEMBER 2018 L Y Z A A N D K N U P P 4261 A Background Investigation of Tornado Activity across the Southern Cumberland Plateau Terrain System of Northeastern Alabama ANTHONY W. LYZA AND KEVIN R. KNUPP Department of Atmospheric Science, Severe Weather Institute–Radar and Lightning Laboratories, Downloaded from http://journals.ametsoc.org/mwr/article-pdf/146/12/4261/4367919/mwr-d-18-0300_1.pdf by NOAA Central Library user on 29 July 2020 University of Alabama in Huntsville, Huntsville, Alabama (Manuscript received 23 August 2018, in final form 5 October 2018) ABSTRACT The effects of terrain on tornadoes are poorly understood. Efforts to understand terrain effects on tornadoes have been limited in scope, typically examining a small number of cases with limited observa- tions or idealized numerical simulations. This study evaluates an apparent tornado activity maximum across the Sand Mountain and Lookout Mountain plateaus of northeastern Alabama. These plateaus, separated by the narrow Wills Valley, span ;5000 km2 and were impacted by 79 tornadoes from 1992 to 2016. This area represents a relative regional statistical maximum in tornadogenesis, with a particular tendency for tornadogenesis on the northwestern side of Sand Mountain. This exploratory paper investigates storm behavior and possible physical explanations for this density of tornadogenesis events and tornadoes. Long-term surface observation datasets indicate that surface winds tend to be stronger and more backed atop Sand Mountain than over the adjacent Tennessee Valley, potentially indicative of changes in the low-level wind profile supportive to storm rotation. The surface data additionally indicate potentially lower lifting condensation levels over the plateaus versus the adjacent valleys, an attribute previously shown to be favorable for tornadogenesis. -
Estimating Wind Damage in Forested Areas Due to Tornadoes
Article Estimating Wind Damage in Forested Areas Due to Tornadoes Mohamed A. Mansour 1,2, Daniel M. Rhee 3, Timothy Newson 1,* , Chris Peterson 4 and Franklin T. Lombardo 3 1 Department of Civil and Environmental Engineering, Western University, London, ON N6A 5B9, Canada; [email protected] 2 Public Works Engineering Department, Cairo University, Giza 12613, Egypt 3 Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Champaign, IL 61801, USA; [email protected] (D.M.R.); [email protected] (F.T.L.) 4 Department of Plant Biology, University of Georgia, Athens, GA 30602, USA; [email protected] * Correspondence: [email protected]; Tel.: +1-519-850-2973 Abstract: Research Highlights: Simulations of treefall patterns during tornado events have been conducted, enabling the coupled effects of tornado characteristics, tree properties and soil conditions to be assessed for the first time. Background and Objectives: Treefall patterns and forest damage assessed in post-storm surveys are dependent on the interaction between topography, biology and meteorology, which makes identification of characteristic behavior challenging. Much of our knowledge of tree damage during extreme winds is based on synoptic storms. Better characterization of tree damage will provide more knowledge of tornado impacts on forests, as well as their ecological significance. Materials and Methods: a numerical method based on a Rankine vortex model coupled with two mechanistic tree models for critical wind velocity for stem break and windthrow was used to simulate tornadic tree damage. To calibrate the models, a treefall analysis of the Alonsa tornado was used. Parametric study was conducted to assess induced tornadic tree failure patterns for uprooting on saturated and unsaturated soils and stem break with different knot factors. -
Program Agenda (Updated 10 October 2011) National Weather
Program Agenda (Updated 10 October 2011) changes or additions from previous update in red National Weather Association 36th Annual Meeting Wynfrey Hotel, Birmingham, Alabama October 15-20, 2011 Theme: The End Game - From Research and Technology to Best Forecast and Response See the main meeting page http://www.nwas.org/meetings/nwa2011/ for information on the meeting hotel, exhibits, sponsorships and registration Authors, please inform the Program Committee at [email protected] for any corrections or changes required in the listing of your presentations or abstracts as soon as possible. This agenda will be updated periodically as changes occur. Instructions for uploading your presentation to the FTP site can be found here. All presenters please read the presentation tips which explain the AV systems, poster board sizes and provide suggestions for good presentations. All activities will be held in the Wynfrey Hotel unless otherwise noted. Please check in at the NWA Information and Registration desk at the Wynfrey Hotel earliest to receive nametags, program and the most current information. Saturday, October 15 10:00am NWA Aviation Workshop at the Southern Museum of Flight. Contact Terry Lankford [email protected] for more information. The workshop is from 10 am until 1 pm. 10:00am NWA WeatherFest at the McWane Science Center. Contact James-Paul Dice [email protected] for more information. The event is from 10 am until 2 pm. 11:00am NWA Ninth Annual Scholarship Golf Outing, Bent Brook Golf Course, sponsored by Baron Services. Contact Betsy Kling [email protected] for more information or to sign-up. -
Damage Analysis of Three Long-Track Tornadoes Using High-Resolution Satellite Imagery
atmosphere Article Damage Analysis of Three Long-Track Tornadoes Using High-Resolution Satellite Imagery Daniel Burow * , Hannah V. Herrero and Kelsey N. Ellis Department of Geography, University of Tennessee, Knoxville, 1000 Phil Fulmer Way, Knoxville, TN 37920, USA; [email protected] (H.V.H.); [email protected] (K.N.E.) * Correspondence: [email protected] Received: 2 May 2020; Accepted: 8 June 2020; Published: 10 June 2020 Abstract: Remote sensing of tornado damage can provide valuable observations for post-event surveys and reconstructions. The tornadoes of 3 March 2019 in the southeastern United States are an ideal opportunity to relate high-resolution satellite imagery of damage with estimated wind speeds from post-event surveys, as well as with the Rankine vortex tornado wind field model. Of the spectral metrics tested, the strongest correlations with survey-estimated wind speeds are found using a Normalized Difference Vegetation Index (NDVI, used as a proxy for vegetation health) difference image and a principal components analysis emphasizing differences in red and blue band reflectance. NDVI-differenced values across the width of the EF-4 Beauregard-Smiths Station, Alabama, tornado path resemble the pattern of maximum ground-relative wind speeds across the width of the Rankine vortex model. Maximum damage sampled using these techniques occurred within 130 m of the tornado vortex center. The findings presented herein establish the utility of widely accessible Sentinel imagery, which is shown to have sufficient spatial resolution to make inferences about the intensity and dynamics of violent tornadoes occurring in vegetated areas. Keywords: tornadoes; tornado damage; remote sensing; Sentinel-2; NDVI; PCA; Rankine vortex 1. -
Estimating Enhanced Fujita Scale Levels Based on Forest Damage Severity
832 ESTIMATING ENHANCED FUJITA SCALE LEVELS BASED ON FOREST DAMAGE SEVERITY Christopher M. Godfrey∗ University of North Carolina at Asheville, Asheville, North Carolina Chris J. Peterson University of Georgia, Athens, Georgia 1. INTRODUCTION tion of how terrain-channeled low-level flow influences the mesoscale environment and tornadogenesis. Both Enhanced Fujita (EF) scale estimates following tor- Bluestein (2000) and Bosart et al. (2006) suggest that nadoes remain challenging in rural areas with few tra- further numerical simulations of the supercellular and ditional damage indicators. In some cases, traditional low-level environment are warranted. Indeed, numerous ground-based tornado damage surveys prove nearly im- authors use numerical simulations to study near-surface possible, such as in several 27 April 2011 long-track tornado dynamics (e.g., Dessens 1972; Fiedler 1994; tornadoes that passed through heavily forested and of- Fiedler and Rotunno 1986; Lewellen and Lewellen 2007; ten inaccessible terrain across the southern Appalachian Lewellen et al. 1997, 2000, 2008), but only recently has Mountains. One tornado, rated EF4, traveled 18 miles anyone attempted to incorporate very simple terrain vari- over the western portion of the Great Smoky Moun- ations into such models (e.g., D. Lewellen 2012, personal tains National Park (GSMNP) in eastern Tennessee. This communication). Thus, observational studies that char- tornado received its rating based on a single damage acterize the near-surface tornadic wind field in complex indicator—the tornado collapsed a metal truss tower topography remain vitally important. along an electrical transmission line (NWS Morristown 2011, personal communication). Although the upper Previous studies of tornado tracks through forests (e.g., Bech et al. -
3.5 an Overview of the 28 April 2014 Tornado Outbreak in the Tennessee Valley
3.5 An Overview of the 28 April 2014 Tornado Outbreak in the Tennessee Valley Christopher B. Darden, Brian C. Carcione, David J. Nadler, Kristopher D. White National Weather Service, Huntsville, AL Bryce R. Williams Department of Atmospheric Science, University of Alabama in Huntsville, Huntsville, AL 1. Introduction The synoptic pattern at 0000 UTC on 29 Although 2014 is generally considered April (during the heart of the event) was marked to be an overall below-normal severe weather by a closed low pressure area centered over year, late April 2014 was marked by a typically- southeastern Nebraska at 500 hPa (Figure 3), active period across the southeastern United resulting in a negatively-tilted trough across the States, including a record rainfall event along the Mississippi and Tennessee valleys. East of the Gulf Coast on 29 April, and a regional tornado low, modest ridging created diffluent flow from outbreak on 28-29 April. That tornado outbreak the Tennessee Valley into the eastern Great affected primarily Mississippi (including an EF- Lakes. 4 tornado which struck the town of Louisville, The surface map from 0000 UTC 29 MS) and Alabama, but also impacted Tennessee April (Figure 4) indicated a cyclone directly and western Georgia (Figure 1). under its 500 hPa counterpart with an occluded The National Weather Service weather front extending eastward across Iowa into central forecast office (WFO) in Huntsville, Alabama Illinois. The primary cold front extended covers 11 counties in northern Alabama and southward along the Mississippi River into three counties in southern Tennessee. Within Louisiana, then westward into south Texas. -
U.S. Violent Tornadoes Relative to the Position of the 850-Mb
U.S. VIOLENT TORNADOES RELATIVE TO THE POSITION OF THE 850 MB JET Chris Broyles1, Corey K. Potvin 2, Casey Crosbie3, Robert M. Rabin4, Patrick Skinner5 1 NOAA/NWS/NCEP/Storm Prediction Center, Norman, Oklahoma 2 Cooperative Institute for Mesoscale Meteorological Studies, and School of Meteorology, University of Oklahoma, and NOAA/OAR National Severe Storms Laboratory, Norman, Oklahoma 3 NOAA/NWS/CWSU, Indianapolis, Indiana 4 National Severe Storms Laboratory, Norman, Oklahoma 5 Cooperative Institute for Mesoscale Meteorological Studies, and NOAA/OAR National Severe Storms Laboratory, Norman, Oklahoma Abstract The Violent Tornado Webpage from the Storm Prediction Center has been used to obtain data for 182 events (404 violent tornadoes) in which an F4-F5 or EF4-EF5 tornado occurred in the United States from 1950 to 2014. The position of each violent tornado was recorded on a gridded plot compared to the 850 mb jet center within 90 minutes of the violent tornado. The position of each 850 mb jet was determined using the North American Regional Reanalysis (NARR) from 1979 to 2014 and NCEP/NCAR Reanalysis from 1950 to 1978. Plots are shown of the position of each violent tornado relative to the center of the 850 mb low-level jet. The United States was divided into four parts and the plots are available for the southern Plains, northern Plains, northeastern U.S. and southeastern U.S with a division between east and west at the Mississippi River. Great Plains violent tornadoes clustered around a center about 130 statute miles to the left and slightly ahead of the low-level jet center while eastern U.S. -
Can Elevation Be Associated with the 2011 Joplin, Missouri, Tornado
aphy & N r at Stimers and Paul, J Geogr Nat Disast 2017, 7:2 og u e ra l G f D DOI: 10.4172/2167-0587.1000202 o i s l a Journal of a s n t r e u r s o J ISSN: 2167-0587 Geography & Natural Disasters ResearchReview Article Article Open Access Can Elevation be Associated with the 2011 Joplin, Missouri, Tornado Fatalities? An Empirical Study Mitchel Stimers* and Bimal Kanti Paul Department of Natural and Physical Sciences, Cloud County Community College, Junction City, Kansas, 66441, USA Abstract The 2011 Joplin, MO, USA, tornado set a record in terms of the number of lives lost-no other tornado in the United States had killed as many as 161 people since 1950. There are many stochastic parameters that can affect the speed, direction, and magnitude of a tornado and it is thought that elevation may play a role in tornado intensity. The Joplin tornado created a track whose elevation was approximately 50 m from beginning to end, providing the impetus to examine whether or not the elevation change over the damage path tornado is associated with fatalities that resulted from the event. Using data collected from various sources, and the application of GIS as well as non-parametric statistics, we reveal that the elevation and tornado fatalities are inversely related, however; the relationship is not statistically significant, the reasons for which are discussed. Keywords: Joplin tornado; Tornado fatalities; Elevation; Damage Dating to 1950, when official tabulation began, no other tornado zone; GIS in the US had killed as many people as the Joplin event. -
Observational Analysis of the Interaction Between a Baroclinic Boundary and Supercell Storms on 27 April 2011
OBSERVATIONAL ANALYSIS OF THE INTERACTION BETWEEN A BAROCLINIC BOUNDARY AND SUPERCELL STORMS ON 27 APRIL 2011 by ADAM THOMAS SHERRER A THESIS Submitted in partial fulfillment of the requirements for the degree of Master of Science in The Department of Atmospheric Science to The School of Graduate Studies of The University of Alabama in Huntsville HUNTSVILLE, ALABAMA 2014 ABSTRACT The School of Graduate Studies The University of Alabama in Huntsville Degree Master of Science College/Dept. Science/Atmospheric Science Name of Candidate Adam Sherrer Title Observational Analysis of the Interaction Between a Baroclinic Boundary and Supercell Storms on 27 April 2011 A thermal boundary developed during the morning to early afternoon hours on 27 April as a result of rainfall evaporation and shading from reoccurring deep convection. This boundary propagated to the north during the late afternoon to evening hours. The presence of the boundary produced an area more conducive for the formation of strong violent tornadoes through several processes. These processes included the production of horizontally generated baroclinic vorticity, increased values in storm- relative helicity, and decreasing lifting condensation level heights. Five supercell storms formed near and/or propagated alongside this boundary. Supercells that interacted with this boundary typically produced significant tornadic damage over long distances. Two of these supercells formed to the south (warm) side of the boundary and produced a tornado prior to crossing to the north (cool) side of the boundary. These two storms exhibited changes in appearance, intensity, and structure. Two other supercells formed well south of the boundary. These two storms remained relatively weak until they interacted with the boundary.