An Integrated Damage, Visual, and Radar Analysis of the 2013 Moore, Oklahoma EF5 Tornado

An integrated damage, visual, and radar analysis of the EF5 Moore, Oklahoma, tornado that occurred on 20 May 2013 is presented. Characteristics of the damage path are discussed based on detailed ground and aerial surveys. Tree fall reveals highly convergent surface flow over the majority of the damage path. At times, the convergent flow is observed at radii less than that of the condensation funnel. A photogrammetric analysis of still photos and video shows that the damaging winds extend well beyond the condensation funnel location. The condensation funnel often coincides with the EF1, EF2, and EF3 isopleths. Observations of the tornado debris signature (TDS) by the Twin Lakes (KTLX)–Weather Surveillance Radar-1988 Doppler (WSR-88D) are presented. The TDS is not a good indicator of tornado intensity just after tornadogenesis. The spatial relationship between the TDS, condensation funnel, and damage path is highlighted. An analysis of the area encompassed by the respective EF-scale isopleths is presented t...

[1]  Kevin M. Simmons,et al.  Normalized tornado damage in the United States: 1950–2011 , 2013 .

[2]  Timothy P. Marshall,et al.  Tornado Damage Survey at Moore, Oklahoma , 2002 .

[3]  Christopher D. Karstens,et al.  Analysis of Tornado-Induced Tree Fall Using Aerial Photography from the Joplin, Missouri, and Tuscaloosa–Birmingham, Alabama, Tornadoes of 2011* , 2013 .

[4]  A. Houston,et al.  Observational Analysis of the 27 May 1997 Central Texas Tornadic Event.Part II: Tornadoes , 2007 .

[5]  Guifu Zhang,et al.  Attenuation Correction and Hydrometeor Classification of High-Resolution, X-band, Dual-Polarized Mobile Radar Measurements in Severe Convective Storms , 2009 .

[6]  Kevin M. Simmons.  Economic and Societal Impacts of Tornadoes , 2011 .

[7]  Patricia M. Pauley,et al.  The theoretical, discrete, and actual response of the Barnes objective analysis scheme for one- and two-dimensional fields , 1990 .

[8]  Curtis R. Alexander,et al.  The 30 May 1998 Spencer, South Dakota, Storm. Part II: Comparison of Observed Damage and Radar-Derived Winds in the Tornadoes , 2005 .

[9]  Tetsuya Theodore. Fujita,et al.  PALM SUNDAY TORNADOES OF APRIL 11, 1965 , 1970 .

[10]  Charles A. Doswell,et al.  The Tornadoes of 3 May 1999: Event Verification in Central Oklahoma and Related Issues , 2002 .

[11]  A. Ryzhkov,et al.  Polarimetric Tornado Detection , 2005 .

[12]  D. Dowell,et al.  The Kellerville Tornado during VORTEX: Damage Survey and Doppler Radar Analyses , 2003 .

[13]  Joseph H. Golden,et al.  Life Cycle of the Union City, Oklahoma Tornado and Comparison with Waterspouts , 1978 .

[14]  Charles A. Doswell,et al.  Normalized Damage from Major Tornadoes in the United States: 1890 1999 , 2001 .

[15]  Kevin R. Knupp,et al.  The Iowa Cyclonic-Anticyclonic Tornado Pair and Its Parent Thunderstorm , 1980 .

[16]  T. Fujita.  Tornadoes and Downbursts in the Context of Generalized Planetary Scales , 1981 .

[17]  Alexander V. Ryzhkov,et al.  Polarimetric Signatures in Supercell Thunderstorms , 2008 .

[18]  Alexander V. Ryzhkov,et al.  Tornado Damage Estimation Using Polarimetric Radar , 2013 .

[19]  John T. Snow,et al.  Multiple Vortex Features in the Tornado Cyclone and the Occurrence of Tornado Families , 1976 .

[20]  Alexander V. Ryzhkov,et al.  Observations of the 10 May 2010 Tornado Outbreak Using OU-PRIME: Potential for New Science with High-Resolution Polarimetric Radar , 2011 .

[21]  Joseph H. Golden,et al.  A Review of Tornado Observations , 2013 .

[22]  Anshuman Razdan,et al.  A Stereo Photogrammetric Technique Applied to Orographic Convection , 2007 .

[23]  Francesc Junyent,et al.  Close-Range Observations of Tornadoes in Supercells Made with a Dual-Polarization, X-Band, Mobile Doppler Radar , 2007 .

[24]  Erik N. Rasmussen,et al.  Terrestrial Photogrammetry of Weather Images Acquired in Uncontrolled Circumstances , 2003 .

[25]  Tetsuya Theodore. Fujita,et al.  Analytical Mesometeorology: A Review , 1963 .

[26]  Tetsuya Theodore. Fujita,et al.  "Proposed Characterization of Tornadoes and Hurricanes by Area and Intensity," by Fujita, T. Theodore; SMRP Research Paper Number 91; Illustrations, Prints, Negatives, and Drawings, 1970. , 1971 .

[27]  Steven E. Koch,et al.  An interactive Barnes objective map analysis scheme for use with satellite and conventional data , 1983 .

[28]  T. M. Crawford,et al.  Doppler Radar Analysis of the Northfield, Texas, Tornado of 25 May 1994 , 1997 .

[29]  J. Xia,et al.  The Influence of a Local Swirl Ratio on Tornado Intensification near the Surface , 2000 .

[30]  R. Wakimoto,et al.  The LaGrange Tornado during VORTEX2. Part I: Photogrammetric Analysis of the Tornado Combined with Single-Doppler Radar Data , 2011 .

[31]  Wen-Chau Lee,et al.  Tropical Cyclone Kinematic Structure Retrieved from Single-Doppler Radar Observations. Part I: Interpretation of Doppler Velocity Patterns and the GBVTD Technique , 1999 .

[32]  James G. LaDue,et al.  Implementing the new Enhanced Fujita scale within the NWS , 2006 .

[33]  Kevin A. Scharfenberg,et al.  Tornado Intensity Estimation: Past, Present, and Future , 2013 .