Poster Session 1 Severe Local Storms Symposium

Program Chair: C. Alexander , NOAA
Reviewers: John Allen , Central Michigan Univ. ; Tanya Brown , Insurance Institute for Business & Home Safety ; Manda Chasteen , CIMMS ; Julie Demuth , NCAR ; Pamela Heinselman , NSSL ; Jana Houser , Ohio Univ. ; Alicia Klees , Pennsylvania State Univ. ; Kelly Lombardo , Univ. of Connecticut ; Corey Potvin , NOAA/OAR/NSSL, and School of Meteorology, Univ. of Oklahoma

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Tuesday, 14 January 2020

Tuesday | top

8:30 AM-10:00 AM: Tuesday, 14 January 2020

Recording files available
Session 1
Field Observations of Physical Processes to Understand Severe Storms
Location: 258B (Boston Convention and Exhibition Center)
Host: Severe Local Storms Symposium
Chairs: John Allen, Central Michigan Univ.; Pamela Heinselman, NSSL
8:30 AM
1.1
Mesoscale Convective Systems in Nature and in Models
Matthew D. Parker, North Carolina State Univ., Raleigh, NC
Recorded Presentation

8:45 AM
1.2
Low-Level Winds in Tornadoes
Karen A. Kosiba, Center for Severe Weather Research, Boulder, CO; and J. Wurman and P. Robinson

9:00 AM
1.3
Targeted Observation by Radars and UAS of Supercells (TORUS): Summary of the 2019 Field Campaign
Adam L. Houston, Univ. of Nebraska−Lincoln, Lincoln, NE; and B. Argrow, M. C. Coniglio, E. W. Frew, E. N. Rasmussen, C. C. Weiss, and C. L. Ziegler
Recorded Presentation

9:15 AM
1.4
TORUS 2019 Highlights from the TTUKa Mobile Doppler Radars
Christopher C. Weiss, Texas Tech Univ., Lubbock, TX; and A. Schueth and A. L. Houston

9:30 AM
1.5
How Environmental Streamwise Vorticity Modulates the Streamwise Vorticity Current
Alex Schueth, Texas Tech Univ., Lubbock, TX; and C. C. Weiss
Recorded Presentation

9:45 AM
1.6
Spring 2019 Aboveground Thermodynamic Observations in Convective Storms from Balloon-Borne Probes Acting as Pseudo-Lagrangian Drifters
Elissa A. Bartos, The Pennsylvania State Univ., Univ. Park, PA; and P. M. Markowski and Y. P. Richardson
Recorded Presentation

9:00 AM-6:00 PM: Tuesday, 14 January 2020


Exhibit Hall (Tuesday)
Location: Hall A (Boston Convention and Exhibition Center)

10:00 AM-10:30 AM: Tuesday, 14 January 2020


AM Coffee Break (Tuesday)
Location: Boston Convention and Exhibition Center

10:30 AM-12:00 PM: Tuesday, 14 January 2020

Recording files available
Session 2
Modeling of Physical Processes to Understand Severe Storms
Location: 258B (Boston Convention and Exhibition Center)
Host: Severe Local Storms Symposium
Chairs: C. Alexander, NOAA; Corey Potvin, NOAA/OAR/NSSL, and School of Meteorology, Univ. of Oklahoma
10:30 AM
2.1
A 10-m Resolution Quarter-Trillion Gridpoint Tornadic Supercell Simulation
Leigh Orf, Univ. of Wisconsin–Madison, Madison, WI

10:45 AM
2.2
Evaluating the Effective Inflow Layer and Supercell Updraft Intensity in a Variety of Realistic Environments
Christopher J. Nowotarski, Texas A&M Univ., College Station, TX; and J. M. Peters
Recorded Presentation

11:00 AM
2.3
"Volatility of Tornadogenesis" and Modes of Storm-Scale Variability in VORTEX2 Near- and Far-Field Environments
Matthew D. Flournoy, Univ. of Oklahoma, Norman, OK; and E. Rasmussen and M. C. Coniglio
Recorded Presentation

11:15 AM
2.4
Quasi-Linear Convective Systems over Topographically Complex Coastal Regions
Kelly Lombardo, The Pennsylvania State Univ., Univ. Park, PA; and F. Wu
Recorded Presentation

11:30 AM
2.5
Influences on Hail Size as Inferred from Hailstone Growth Trajectory Model Calculations
Matthew R. Kumjian, The Pennsylvania State Univ., Univ. Park, PA; and K. Lombardo
Recorded Presentation

11:45 AM
2.6
The Impacts of "Business as Usual" Climate Change on Supercell Thunderstorms
Matthew Gropp, Univ. of North Carolina at Charlotte, Charlotte, NC; and C. E. Davenport
Recorded Presentation

12:00 PM-1:30 PM: Tuesday, 14 January 2020


Lunch Break (Tuesday)

1:30 PM-2:30 PM: Tuesday, 14 January 2020

Recording files available
Session 3
History and Evolution of the Forecasting and Warning Process and Its Challenges
Location: 258B (Boston Convention and Exhibition Center)
Host: Severe Local Storms Symposium
Chairs: Julie Demuth, NCAR; Alicia Klees, Pennsylvania State Univ.
1:30 PM
3.1
Generating Probabilistic Severe Timing Information from SPC Outlooks Using the HREF
Israel L. Jirak, NOAA/NWS/NCEP/Storm Prediction Center, Norman, OK; and M. S. Elliott, C. D. Karstens, R. S. Schneider, P. T. Marsh, and W. F. Bunting
Recorded Presentation Manuscript (989.3 kB)

1:45 PM
3.2
Reducing the Number of Tornado Warnings in Hurricanes while Enhancing Alert Messages
David W. Sharp, NOAA/National Weather Service, Melbourne, FL; and J. Combs and J. Smith
Recorded Presentation

2:00 PM
3.3
Short-Term Tornado Prediction via Deep Learning on 3D Multiscale Data
Ryan A. Lagerquist, CIMMS, Norman, OK; and A. McGovern, C. R. Homeyer, D. J. Gagne II, and T. M. Smith
Recorded Presentation

2:15 PM
3.4
Are Multiday Tornado and Hail Events More Predictable?
Kimberly Hoogewind, CIMMS, Norman, OK; and V. A. Gensini, R. J. Trapp, and H. E. Brooks
Recorded Presentation

2:30 PM-3:00 PM: Tuesday, 14 January 2020


PM Coffee Break (Tuesday)
Location: Boston Convention and Exhibition Center

3:00 PM-4:00 PM: Tuesday, 14 January 2020

Recording files available
Session 4
Next Frontiers of SLS Understanding and Applications of New Tools
Location: 258B (Boston Convention and Exhibition Center)
Host: Severe Local Storms Symposium
Chairs: Manda Chasteen, CIMMS; Kelly Lombardo, The Pennsylvania State University
3:00 PM
4.1
Some Good or Foolish Ideas, with Farm Names, Concerning the Future of Adaptable Radar Networks for Severe Storm Observations
Josh Wurman, Center for Severe Weather Research, Boulder, CO; and K. A. Kosiba and B. Pereira
Recorded Presentation

3:15 PM
4.2
Next-Generation Satellite Observations of Severe Local Storms: Can We now Detect Storm-Scale Rotation from Space?
D. T. Lindsey, NOAA/NESDIS, Fort Collins, CO
Recorded Presentation

3:30 PM
4.3
Convection-Allowing Medium-Range Severe Weather Guidance from a Variable-Resolution Global Ensemble
Craig S. Schwartz, NCAR, Boulder, CO; and R. A. Sobash
Recorded Presentation

3:45 PM
4.4
Robust Observational Support of the Hypothesized Connection between Rotating Updraft Width and Tornado Intensity
Robert J. Trapp, Univ. of Illinois at Urbana–Champaign, Urbana, IL; and G. Marion, M. F. Sessa, D. Chehak, and S. W. Nesbitt
Recorded Presentation

4:00 PM-6:00 PM: Tuesday, 14 January 2020


Formal Poster Viewing Reception (Tues)
Location: Hall B (Boston Convention and Exhibition Center)

Poster Session 1
Severe Local Storms Symposium: Poster Session
Location: Hall B (Boston Convention and Exhibition Center)
Host: Severe Local Storms Symposium
918
High-Temporal-Resolution Observations of Tornadogenesis Using the Atmospheric Imaging Radar
Casey B. Griffin, Univ. of Nebraska—Lincoln, Lincoln, NE; Univ. of Oklahoma, Norman, OK; and D. J. Bodine, A. Mahre, and R. D. Palmer

Handout (10.0 MB)

919
Analysis of Tornadogenesis Failure Using Rapid-Scan Data from the Atmospheric Imaging Radar
Kyle Pittman, Northern Illinois Univ., DeKalb, IL; and A. Mahre, C. B. Griffin, D. Bodine, J. M. Kurdzo, and V. A. Gensini

Handout (1.2 MB)

920
On Tornadogenesis in Two Supercells in Oklahoma in the Spring of 2019 as Documented by a Rapid-Scan, X-Band, Polarimetric, Mobile Doppler Radar (RaXPol)
Howard B. Bluestein, Univ. of Oklahoma, Norman, OK; and T. A. Greenwood, D. W. Reif, and Z. B. Wienhoff

921
High-Temporal-Resolution X-Band Polarimetric Radar Analysis of the 20 May 2013 Moore, Oklahoma, Supercell during Tornadogenesis and Tornado Intensification
Clarice N. Dyson, Univ. of Oklahoma, Norman, OK; and D. J. Bodine and R. D. Palmer

922
Rapid-Scan, Polarimetric Radar Observations of the Dissipation of a Violent Tornado on 9 May 2016 Near Sulphur, Oklahoma
Katherine E. McKeown, Stony Brook Univ., Stony Brook, NY; and M. M. French, K. S. Tuftedal, H. B. Bluestein, and Z. B. Weinhoff

923
Storm-Scale Polarimetric Radar Signatures Associated with Tornado Dissipation in Supercells
Jacob H. Segall, Stony Brook Univ., East Setauket, NY; and M. French, D. Kingfield, and J. C. Snyder

924
Observation of Tornadoes Using a Compact Polarimetric X-Band Weather Radar
Takuo Kashiwa, Furuno Electric Co., Ltd., Nishinomiya, Hyogo, Japan; and T. Takaki, M. Minowa, H. Nakajima, K. Sassa, and V. Chandrasekar

Handout (1.3 MB)

925
Polarimetric Characteristics of Tornadic Debris Fallout during the 28 May 2019 Lawrence/Kansas City, Kansas, Tornado
Erik Wang, Phillips Academy, Andover, MA; and D. J. Bodine, J. M. Kurdzo, J. Barham, C. Bowman, and P. Pietrycha
Manuscript (1.1 MB)

Handout (12.5 MB)

926
Observations of ZDR Columns in Supercells in 2019 by a Mobile, Dual-Polarized, Phased-Array Radar
Robin Tanamachi, Purdue Univ., West Lafayette, IN; and A. T. LaFleur, M. Sharma, S. J. Frasier, W. Heberling, C. Wolsieffer, L. Warner, and R. E. Nelson

Handout (24.6 MB)

927
Observed Bulk Hook-Echo Drop-Size Distribution Evolution in Supercell Tornadogenesis and Tornadogenesis Failure
Kristofer S. Tuftedal, Stony Brook Univ., Stony Brook, NY; and M. M. French, D. M. Kingfield, and J. C. Snyder

928
Comparison of Simulated Rain DSDs and Polarimetric Signatures with Disdrometer and Radar Observations in the 31 March 2016 Southeast U.S. Tornado Outbreak during Vortex-SE
Daniel T. Dawson II, Purdue Univ., West Lafayette, IN; and R. Tanamachi, Y. Jung, J. Labriola, B. J. Putnam, M. Xue, P. L. Heinselman, K. H. Knopfmeier, E. R. Mansell, and L. J. Wicker

929
Radar Climatology of Precipitation Features in Close Proximity to Supercell Tornadic Storms
Preston Pangle, Univ. of Alabama in Huntsville, Huntsville, AL; and K. Knupp and B. T. Goudeau

930
An Updated Mobile-Radar-Based Climatology of Tornadoes
Josh Wurman, Center for Severe Weather Research, Boulder, CO; and P. Robinson, T. White, and K. A. Kosiba

931
Weather Radar Analysis of Severe Storms Depth in Southern Brazil and Paraguay
Leonardo Calvetti, Universidade Federal de Pelotas, Pelotas, Brazil; and C. Beneti, P. A. Mello, W. F. Coelho, and J. Báez

932
Hail Size and Dual-Polarization Doppler on Wheels Radar Observations during RELAMPAGO
Matthew R. Kumjian, The Pennsylvania State Univ., Univ. Park, PA; and P. Maldonado, B. Ribeiro, J. S. Soderholm, N. McCarthy, K. Lombardo, K. A. Kosiba, J. Wurman, L. Machado, and P. Salio

933
Analysis of Hailstone Physical Properties from the IBHS Field Project 2012–17
Laura Shedd, The Pennsylvania State Univ., Univ. Park, PA; and M. R. Kumjian, I. M. Giammanco, T. M. Brown-Giammanco, and R. Maiden

934
Understanding Hailstone Characteristics and Contributing Factors over the U.S. Southern Great Plains
Jong-Hoon Jeong, PNNL, Richland, WA; and J. Fan, C. R. Homeyer, and Z. Hou

935
An Extended Hail Climatology for Sydney, Australia, Derived from a Storm Database, Radar Reflectivity, Reanalysis, and Sounding Data
Kellie R. Cook, Macquarie Univ., Sydney, Australia; and K. K. W. Cheung and F. Ji

Handout (3.8 MB)

936
Impacts of Urbanization on Hail and Tornado Characteristics of a Severe Convective Storm
Yun Lin, PNNL, Richland, WA; and J. Fan, J. H. Jeong, and Y. Zhang

937
TORUS in the Clear Air: Preconvection Observations from an Airborne and Mobile Radar Perspective
Anthony E. Reinhart, OU/CIMMS and NOAA/OAR/NSSL, Norman, OK; and E. N. Smith, C. L. Ziegler, and C. C. Weiss

938
TORUS in the Clear Air: Preconvection Observations from a Profile and Transect Perspective
Elizabeth N. Smith, CIMMS, Norman, OK; NSSL, Norman, OK; and A. Reinhart, M. Coniglio, and C. L. Ziegler

939
Doppler Wind Lidar in the Inflow of Supercells: Synthesis of Observations from Mini-MPEX and TORUS 2019
Michael Coniglio, NSSL, Norman, OK; and E. N. Smith and D. D. Turner

940
Investigating Windsond Observations in Supercells
Madeline R. Diedrichsen, Univ. of Nebraska—Lincoln, Lincoln, NE; and M. D. Flournoy and E. N. Rasmussen

Handout (1.4 MB)

941
Influences of Anvil Shading on the Evolution of the Supercell Environment and Updraft Accelerations during the Nocturnal Transition
Marc Bremenkamp, Texas A&M Univ., College Station, TX; and C. J. Nowotarski

942
Are Supercells Resistant to Entrainment because of Their Rotation?
John M. Peters, NPS, Pacific Grove, CA; and C. J. Nowotarski and G. L. Mullendore

943
Testing a Physics-Based Model of the Thermodynamic Environment in Supercell Simulation Experiments
Daniel R. Chavas, Purdue Univ., West Lafayette, IN; and D. T. Dawson II

944
New Perspectives on the Influence of Lifting Condensation Level on Low-Level Outflow and Rotation in Simulated Supercells

945
Development and Evolution of a High Theta-E Outflow Air Mass
Jason M. Keeler, Central Michigan Univ., Mount Pleasant, MI

946
Properties of Cold Pools Observed during the VORTEX-SE: Meso18–19 Field Campaign
Jessica M. McDonald, Texas Tech Univ., Lubbock, TX; and C. C. Weiss and A. J. Hill

Handout (21.3 MB)

947
An Investigation of Hydrometeor Latent Cooling upon Cold Pool Formation, Sustainment, and Properties
Holly M. Mallinson, Univ. of Illinois at Urbana–Champaign, Urbana, IL; and S. Lasher-Trapp

948
Microphysical and Dynamic Effects of Mixed-Phase Hydrometeors in Simulated Mesoscale Convective Storms Using a Bin Microphysics Model with Explicit Melting
Kevin Kacan, NWS, White Lake, MI; and Z. Lebo

949
Effects of Horizontal Grid Spacing and Inflow Environment on Cyclic Mesocyclogenesis in NSSL's Warn-on-Forecast System (WOFS)
Kelsey C. Britt, CIMMS/Univ. of Oklahoma, Norman, OK; and P. S. Skinner, P. L. Heinselman, and K. H. Knopfmeier

950
Assimilating Near-Surface Observations from a Portable Mesoscale Network of StickNet Platforms during VORTEX-SE with the High-Resolution Rapid Refresh Ensemble
Aaron J. Hill, Colorado State Univ., Fort Collins, CO; and C. C. Weiss and D. C. Dowell

951
Using Ensemble Sensitivity Analysis to Identify Storm-Scale Characteristics Associated with Tornadic Potential in High-Resolution Idealized Supercells
Abby L. Hutson, Texas Tech Univ., Lubbock, TX; and C. C. Weiss

952
An Idealized Modeling Study of the Nontornadic and Tornadic Supercells Intercepted by VORTEX2 on 10 June 2010
Alicia Klees, The Pennsylvania State Univ., Univ. Park, PA; and Y. Richardson

953
Detection and Estimation of Multiscale Complex Spatiotemporal Processes in Tornadic Supercells from Multiparameter Radar Simulations and Observations
Lawrence Frank, UCSD, La Jolla, CA; and V. L. Galinsky, L. Orf, and D. Bodine

954
A Numerical Study on a Tornado That Formed in a Quasi Linear Convective System over Kanto Plain in Japan
Eigo Tochimoto, Univ. of Tokyo, Kashiwa, Japan; and H. Niino

956
Understanding How Complex Terrain Impacts Tornado Dynamics Using a Suite of High-Resolution Numerical Simulations
Martin A. Satrio, Univ. of Oklahoma, Norman, OK; and D. J. Bodine, A. E. Reinhart, T. Maruyama, and F. T. Lombardo

955
Tornadogenesis within a Supercell Storm near a Mei-Yu Frontal System in Eastern China: Dynamical Analyses Based on a Tornado-Resolving Real-Data Simulation

957
Turbulence Memory’s Possible Influence on Tornado Intensity
Aaron Wang, The Pennsylvania State Univ., Univ. Park, PA; and Y. Pan and P. Markowski

Handout (1.3 MB)

958
Hydraulic Jump Dynamics in an Above-Anvil Cirrus Plume in a 50-m Resolution Simulated Supercell
Leigh Orf, Univ. of Wisconsin–Madison, Madison, WI; and M. O'Neill

Handout (56.7 MB)

959
Lagrangian Trajectory Analysis of Severe Convective Storms Using Variable Lossy Compression
Kelton T. Halbert, Univ. of Wisconsin–Madison/CIMSS, Madison, WI; and L. Orf

960
Observational Analysis of Supercells in Landfalling TC Yagi in 2018
Jingyi Wen, Peking Univ., Beijing, China; and Z. Meng

961
Mechanism Analysis and Numerical Simulations of a Series of Back-Building Supercells
Jianhua Dai, Shanghai Central Meteorological Observatory, Xuhui, Shanghai, China; and M. Sun, Y. Chang, H. Chen, and J. Zhu

962
Assessing Anomalous Propagation of Convective Storms in Complex Terrain Using a Combined Dual-Doppler and Modeling Approach
Anna del Moral, Ph.D, Univ. of Barcelona, Barcelona, Spain; and T. M. Weckwerth, T. Rigo, M. M. Bell, and M. C. Llasat

963
Observational Analysis of a Surface-Based Bow Echo Transitioning to Elevated Convection over Complex Terrain
Amanda Penning, South Dakota School of Mines and Technology, Rapid City, SD; and A. J. French
Manuscript (302.3 kB)

Handout (5.6 MB)

964
Polarimetric Radar and VDRAS investigation of a Bow Echo after a Squall Line Merged with a Convective Cell
Kun Zhao, Nanjing Univ., Nanjing, China; and W. C. Lee, H. Huang, and A. Zhou

965
Lift in the Vertical Shear of Southerly Jet: A Mechanism of Nocturnal Convection in the Absence of Boundaries
Qi Hu, Univ. of Nebraska–Lincoln, Lincoln, NE; and G. Limpert
Manuscript (1.7 MB)

Handout (2.3 MB)

966
The Spatial and Temporal Variations in the Nocturnal Low-Level Jet and Its Role in the Initiation and Maintenance of Mesoscale Convective Systems
Christopher P. Rattray, Univ. of Oklahoma, Norman, OK; and D. B. Parsons and A. Shapiro

967
The Sensitivity of Simulated Summer MCS Activity to Select WRF Parameters
Victor A. Gensini, Northern Illinois Univ., DeKalb, IL; and A. M. Haberlie, W. S. Ashley, and R. S. Schumacher

968
Climatological Applications of Daily Practically Perfect Severe Weather Hindcasts
Victor A. Gensini, Northern Illinois Univ., DeKalb, IL; and A. M. Haberlie and P. T. Marsh

969
A Machine Learning Approach to Severe Thunderstorm Downburst Prediction across Phoenix, Arizona
Luke LeBel, Univ. at Albany, SUNY, Albany, NY; and P. M. Iniguez and J. Rogers

970
A Machine Learning Tool to Provide Probabilities That Thunderstorm Wind Damage Reports Are Due to Severe Intensity Winds
Elizabeth Tirone, Iowa State Univ., Ames, IA; and W. A. Gallus Jr., S. Pal, S. Dutta, R. Maitra, J. L. Newman, and E. S. Weber

971
"Worst Since Sandy": An Examination of the Straight-Line Wind Event in New Jersey on 22 July 2019
Michael A. Favetta, WeatherPrep, LLC, Cedar Knolls, NJ; and M. Powers

Handout (3.3 MB)

972
A Discussion of Infrasound for Tornado Monitoring: Signal Propagation and Detection in the Context of a Field Campaign in Northern Alabama
Roger Waxler, Univ. of Mississippi, Univ., MS; and G. Frazier, C. Hetzer, and C. Talmadge

973
Using Overshooting Top Area to Discriminate the Potential for Large, Intense Tornadoes
Geoffrey Marion, Univ. of Illinois at Urbana–Champaign, Urbana, IL; and R. J. Trapp and S. W. Nesbitt

974
Lightning Cessation Characteristics between Severe and Nonsevere Storms Using Polarimetric Radar Data
Ari D. Preston, Northern Vermont Univ., Lyndonville, VT

975
An Analysis of the Performance of the Houston Lightning Mapping Array during a Period of Intense Convection over the Houston Metropolitan Area during Hurricane Harvey
Timothy Logan, Texas A&M Univ., College Station, TX

976
The Lightning and Dual-Polarization Radar Characteristics of Three Hail-Accumulating Thunderstorms
Robinson W. Wallace, Univ. of Colorado at Boulder, Boulder, CO; and K. Friedrich, W. Deierling, E. A. Kalina, and P. T. Schlatter

Handout (10.6 MB)

977
Efficient Tornado-Producing QLCS Events: Challenges and Best Practices for Damage Surveys
Thomas Winesett, NWS, Jackson, MS; and D. Lamb and C. Entremont

978
Observation and Modeling of Hurricane Maria for Damage Assessment
Rabindra Pokhrel, City College of New York, CUNY, New York, NY; and S. del Cos, J. P. Montoya Rincon, E. Glenn, and J. Gonzalez

979
The Challenges of Surveying Tornado Damage after a Major Hurricane
Lance Franck, National Weather Service, Tallahassee, FL; and J. P. Camp

980
Limits Using the EF Scale for Nontornadic Wind Damage
Jeffry S. Evans, NOAA/NWS/Weather Forecast Office, Dickinson, TX

981
A Comparison of Three Wind Speed Estimation Techniques Based on Tornado-Induced Treefall Patterns
Christopher M. Godfrey, Univ. of North Carolina Asheville, Asheville, NC; and C. D. Karstens, D. Rhee, C. J. Peterson, and F. T. Lombardo
Manuscript (2.5 MB)

Handout (25.2 MB)

982
Demonstrating a Future Application of the Wind Speed Estimation Standard to Tornadoes
J. G. LaDue, NOAA/NWS/Office of Chief Learning Officer/Warning Decision Training Division, Norman, OK; and M. Levitan, T. Marshall, T. M. Brown-Giammanco, A. Womble, J. Wurman, F. T. Lombardo, C. D. Karstens, W. Coulbourne, K. James, and J. Robinson

983
An Automated Photogrammetric Approach to the Estimation of Near-Surface Tornadic Wind Speeds
Daniel Butler, Central Michigan Univ., Mount Pleasant, MI; and J. T. Allen and A. Seimon

984
Simulating Tornado Probability and Tornado Wind Speed Based on Statistical Models
Ariel E. Cohen, NWS, Miami, FL; and J. B. Cohen, R. L. Thompson, B. T. Smith, B. M. Baerg, W. P. Gargan, A. E. Gerard, and C. J. Schultz

985
Impacts of Distance from the Nearest Radar, Time of Day, Resident Population, and Season on Severe Warning Performance. Part I: CONUS Perspective
Janice M. Maldonado-Jaime, NWS, Sioux Falls, SD; and A. P. Ferguson and P. N. Schumacher

Handout (1.3 MB)

986
Impacts of Distance from the Nearest Radar, Time of Day, Resident Population, and Season on Severe Warning Performance. Part II: Regional Analysis
Alex P. Ferguson, NWS, Amarillo, TX; and J. M. Maldonado-Jaime and P. N. Schumacher

Handout (1.3 MB)

987
Exploring Supportive Analytics in the Performance Evaluation of NWS Tornado Warnings
Gregory M. Schoor, NWS/AFSO/FSD, Norman, OK; and K. D. Skow and J. G. Gibbs

988
Hazard Services: An Information-Centric Modernization to the National Weather Service Watch/Warning/Advisory Program and Beyond
D. M. Kingfield, CIRES/Univ. of Colorado Boulder and NOAA/OAR/ESRL/GSD, Boulder, CO; and C. V. Dreisbach, K. Goertz, C. Golden, S. Gui, Y. Guo, T. L. Hansen, N. Hardin, T. J. LeFebvre, J. L. Mahoney, K. L. Manross, S. Murphy, D. Nietfeld, J. E. Ramer, R. Weingruber, S. Williams, and S. Zhuo

989
Immersive Testing and Evaluation of NWS Hazard Services via NRAP (NOAA's Rotational Assignment Program)
Shane Kearns, NWS, Newport, NC

990
Analyzing the Accuracy of the National Weather Service Central Region Tornado Events in Storm Data and Developing Techniques for Database Improvements
Rodney A. Donavon, NWS, Johnston, IA; and C. Cogil

Handout (4.2 MB)

991
Using DCIN and DCAPE to Evaluate Severe Surface Winds in a Case of Elevated Convection
Paula Sumrall, Univ. of Missouri Columbia, Columbia, MO

992
Environments of High-Incidence Area for Tornadoes in China and a Comparison with Its Counterparts in the United States
Ruilin Zhou, Peking Univ., Beijing, China; and Z. Meng and L. Bai

993
On the Prediction of a Violent Tornado Outbreak in Central Oklahoma on 20–21 May 2019
Thomas J. Galarneau Jr., CIMMS, Norman, OK; and A. J. Clark and E. J. Szoke

994
Identifying Teleconnections between Southeastern U.S. Tornado Outbreaks and Daily Climate Indices
Matthew C. Brown, Texas A&M Univ., College Station, TX; Texas A&M Univ., College Station, TX; and C. J. Nowotarski

Handout (1.1 MB)

995
Midtropospheric Patterns and Historic Tornado Outbreaks
Paulina Cwik, Univ. of Oklahoma, Norman, OK; and M. B. Richman and R. A. McPherson

996
A Systematic Way of Tornado Outbreak Classification
Paulina Cwik, Univ. of Oklahoma, Norman, OK; and R. A. McPherson and H. Brooks

996A
Long-term changes in thunderstorm environments over Europe and the United States
Mateusz Taszarek, Adam Mickiewicz University, Poznań, Poland; and J. Allen, H. E. Brooks, B. Czernecki, and N. Pilguj

996B
Derecho Evolving from a Mesocyclone—A Study of 11 August 2017 Severe Weather Outbreak in Poland: Event Analysis and High-Resolution Simulation
Mateusz Taszarek, Adam Mickiewicz University, Poznań, Poland; and N. Pilguj, J. Orlikowski, A. Surowiecki, S. Walczakiewicz, W. Pilorz, K. Piasecki, Ł. Pajurek, and M. Półrolniczak

996C
A Climatology of Thunderstorms across Europe from a Synthesis of Multiple Data Sources
Mateusz Taszarek, Adam Mickiewicz University, Poznań, Poland; and J. Allen, T. Pucik, P. Groenemeijer, B. Czerneckia, L. Kolendowicz, K. Lagouvardos, V. Kotroni, and W. Schulz

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