A Special Symposium on Plains Elevated Convection At Night (PECAN)

Program Chairs: Belay B. Demoz , Univ. of Maryland, Baltimore County ; Tammy M. Weckwerth , NCAR

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Sunday, 7 January 2018

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4:00 PM-5:00 PM: Sunday, 7 January 2018


Plenary Session 1
18th Presidential Forum: Transforming Communication in the Weather, Water, and Climate Enterprise—Focusing on Challenges Facing Our Sciences
Location: Ballroom D (ACC) (Austin, Texas)
4:00 PM
PL1.1
Transforming Communication in the Environmental Sciences: Some Thoughts from a Reluctant Participant (Invited Presentation)
Richard B. Alley, Pennsylvania State Univ., University Park, PA

Tuesday, 9 January 2018

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8:30 AM-10:00 AM: Tuesday, 9 January 2018

Recording files available
Session 1
Convection Initiation
Location: Room 6A (ACC) (Austin, Texas)
Host: A Special Symposium on Plains Elevated Convection At Night (PECAN)
CoChair: Brian J. Carroll, Univ. of Maryland, Baltimore County
8:30 AM
1.1
A Study of the Impact of PECAN Field Campaign Observations on the Numerical Prediction of Nocturnal Convection Initiation using a GSI-Based Ensemble Data Assimilation System
Samuel K. Degelia, Univ. of Oklahoma, Norman, OK; and X. Wang and D. J. Stensrud
Recorded Presentation

8:45 AM
1.2
Radar Rainfall Statistics during PECAN
Tammy M. Weckwerth, NCAR, Boulder, CO; and U. Romatschke
Recorded Presentation

9:00 AM
1.3
Mesoscale Ascent in Nocturnal Low-Level Jets
Alan Shapiro, Univ. of Oklahoma, Norman, OK; and E. Fedorovich and J. Gebauer
Recorded Presentation

9:15 AM
1.4
Convection Initiation along the Outflow Boundary of the 15 July 2015 Nocturnal MCS in Western Kansas
Coltin D. Grasmick, Univ. of Wyoming, Laramie, WY; and B. Geerts
Recorded Presentation

9:30 AM
1.5
Physical Processes Influencing Elevated Convection Initiation during 25–26 June PECAN: Observations and Numerical Simulations
Stanley B. Trier, NCAR, Boulder, CO; and R. D. Roberts, J. Sun, T. M. Weckwerth, and J. W. Wilson
Recorded Presentation

9:45 AM
1.6
Physical Processes Leading to Elevated Convection Initiation during 25–26 June PECAN: Convective-Scale Reanalysis Based on a Radar Data Assimilation System
Juanzhen Sun, NCAR, Boulder, CO; and S. B. Trier
Recorded Presentation

10:00 AM-10:30 AM: Tuesday, 9 January 2018


Coffee . Break

10:30 AM-12:00 PM: Tuesday, 9 January 2018

Recording files available
Session 2
Bores and LLJs
Location: Room 6A (ACC) (Austin, Texas)
Host: A Special Symposium on Plains Elevated Convection At Night (PECAN)
CoChair: Hristo Georgiev Chipilski, Univ. of Oklahoma
10:30 AM
2.1
Thermodynamic Profiling during Undular Bore and Cold Pool Conditions at PECAN FP2
Belay Demoz, Univ. of Maryland, Baltimore County, Baltimore, MD; and B. J. Carroll, R. Delgado, K. Vermeesch, and D. Whiteman
Recorded Presentation

10:45 AM
2.2
Systematic Impacts of Assimilating PECAN IOP Observations on Numerical Prediction of Bores
Aaron Johnson, Univ. of Oklahoma, Norman, OK; and X. Wang
Recorded Presentation

11:00 AM
2.3
When You Get Bore-d: A Composite Analysis of the Impacts of Bore Passage on Boundary Layer Structure and Instability
Timothy J. Wagner, CIMSS, Madison, WI; and D. M. Loveless, D. D. Turner, S. A. Ackerman, and W. F. Feltz
Recorded Presentation

11:15 AM
2.4
Coupling of the Low-Level Jet and Atmospheric Surface Variables by Turbulent Transport during PECAN
Richard D. Clark, Millersville Univ., Millersville, PA; and T. D. Sikora
Recorded Presentation

11:30 AM
2.5
Examining Common Features of the Low-Level Jet during PECAN
Joshua G. Gebauer, Univ. of Oklahoma, Norman, OK; and A. Shapiro, E. Fedorovich, P. Klein, and E. N. Smith
Recorded Presentation

11:45 AM
2.6
The Great Plains Low-Level Jet during PECAN: Observed and Simulated Characteristics
Elizabeth N. Smith, Univ. of Oklahoma, Norman, OK; and P. M. Klein, E. Fedorovich, J. A. Gibbs, and J. G. Gebauer
Recorded Presentation

1:30 PM-3:45 PM: Tuesday, 9 January 2018

Recording files available
Session 3
MCSs
Location: Room 6A (ACC) (Austin, Texas)
Host: A Special Symposium on Plains Elevated Convection At Night (PECAN)
Cochairs: Brian Joseph Squitieri, Iowa State Univ.; Guo Lin, Univ. of Wyoming
1:30 PM
3.1
What We Have Learned about Nocturnal MCS Environments from High-Temporal-Resolution PECAN Sounding Observations
Russ S. Schumacher, Colorado State Univ., Fort Collins, CO; and S. M. Hitchcock, M. D. Parker, M. C. Coniglio, C. L. Ziegler, and J. M. Peters
Recorded Presentation

1:45 PM
3.2
PECAN: Characteristics of Potentially Severe Wind Producing Nocturnal MCSs
Karen A. Kosiba, Center for Severe Weather Research, Boulder, CO; and J. Wurman and P. Robinson
Recorded Presentation

2:00 PM
3.3
Evolution of Mesoscale Convective System Organization Structure and Convective Line Propagation
Kristen Lani Rasmussen, Colorado State Univ, Fort Collins, CO; and D. Bodine
Recorded Presentation

2:15 PM
3.4
Microphysical and Resolution Influences on WRF Forecasts of Convective Morphology Evolution for Nocturnal MCSs in Weakly Forced Environments
Jonathan E. Thielen, Iowa State Univ., Ames, IA; and W. A. Gallus Jr. and B. J. Squitieri
Recorded Presentation

2:30 PM
3.5
Drop-Size Distribution Observations from PECAN in Mesoscale Convective System Stratiform Regions
David J. Bodine, Univ. of Oklahoma, Norman, OK; and K. L. Rasmussen, K. Friedrich, K. A. Kosiba, J. M. Wurman, and P. A. Kucera
Recorded Presentation

2:45 PM
3.6
Analysis of PECAN 2015 MCSs Utilizing Airborne- and Ground-Based Doppler Observations and Airborne In Situ Microphysical Data
Daniel M. Stechman, Univ. of Illinois, Urbana, IL; and R. M. Rauber, G. M. McFarquhar, M. M. Bell, B. F. Jewett, R. A. Black, D. P. Jorgensen, and T. J. Schuur
Recorded Presentation

3:00 PM
3.7
Structure and Dynamics of an Intense Rear-Inflow Jet Observed on 20 June 2015 during PECAN
Michael M. Bell, Colorado State Univ., Fort Collins, CO; and J. Martinez, D. M. Stechman, R. M. Rauber, G. M. McFarquhar, and A. Marchi
Recorded Presentation

3:15 PM
3.8
Analyses of a Severe MCS and Tornadic Mesovortex Observed by PECAN on 5–6 July 2015
Matthew D. Flournoy, Univ. of Oklahoma, Norman, OK; and M. C. Coniglio and C. L. Ziegler
Recorded Presentation

3:30 PM
3.9
Analysis of Backbuilding of a Simulated MCS in an Environment with a Low-Level Stable Layer
Stacey M. Hitchcock, Colorado State Univ., Fort Collins, CO; and R. S. Schumacher
Recorded Presentation

3:45 PM-5:30 PM: Tuesday, 9 January 2018


Formal Poster Viewing with Coffee Break
Location: Exhibit Hall 3 (ACC) (Austin, Texas)

Poster Session
Posters
Location: Exhibit Hall 3 (ACC) (Austin, Texas)
Host: A Special Symposium on Plains Elevated Convection At Night (PECAN)
829
Boundary Layer Structure and Low-Level Jets during PECAN
Brian J. Carroll, Univ. of Maryland, Baltimore County, Baltimore, MD; and B. Demoz, Z. Yang, and R. Delgado

830
A Recent Climatological Look at Tornado Events Relative to Sunset
Erik R. Nielsen, Colorado State Univ., Fort Collins, CO; and G. R. Herman, J. M. Peters, and R. S. Schumacher

Handout (46.4 MB)

831
Microphysical and Near-Storm Environmental Control on the Maintenance of the 15 July 2015 MCS
Tam Iat Hin, National Taiwan Univ., Taipei, Taiwan; and M. J. Yang and W. C. Lee

Handout (1.6 MB)

832
PECAN Refractivity Retrievals from the S-Pol Radar
Rita D. Roberts, NCAR/RAL, Boulder, CO; and T. M. Weckwerth, D. Albo, and L. Hutchinson

833
Drop-Size Distribution Observations from PECAN in Mesoscale Convective System Convective Regions
David J. Bodine, Univ. of Oklahoma, Norman, OK; and K. L. Rasmussen, K. Friedrich, K. A. Kosiba, J. M. Wurman, and P. A. Kucera

834
PX-1000 Observations of Mesoscale Convective Systems during PECAN
David J. Bodine, Univ. of Oklahoma, Norman, OK; and J. M. Kurdzo, B. L. Cheong, and K. L. Rasmussen

835
Investigation of the Cloud-Precipitation Properties of Three Modes of MCSs during the PECAN Field Campaign
Wenjun Cui, Univ. of Arizona, Tucson, AZ; and X. Dong and B. Xi

836
Characterizing Environmental Boundary Layer Conditions around Nocturnal Convective Storms with Airborne Compact Raman Lidar during PECAN
Guo Lin, Univ. of Wyoming, Laramie, WY

837
Analysis of Convectively Generated Gravity Waves in the 14–15 July 2015 Mesoscale Convective System during PECAN
Faith P. Groff, Colorado State Univ., Fort Collins, CO; and R. S. Schumacher and R. Adams-Selin

838
Impacts of Low-Level Stability on MCS Propagation
Stacey M. Hitchcock, Colorado State Univ., Fort Collins, CO; and R. S. Schumacher, K. R. Haghi, and D. B. Parsons

839
Multicase Assessment of Sub-Kilometer-Scale Processes in Atmospheric Bores Using WRF Large Eddy Simulations
Aaron Johnson, Univ. of Oklahoma, Norman, OK; and X. Wang

840
An Object-Based Algorithm for the Identification and Tracking of Convective Outflow Boundaries
Hristo Georgiev Chipilski, Univ. of Oklahoma, Norman, OK; and X. Wang and D. B. Parsons

841
Impact of Assimilating PECAN IOP Observations on the Numerical Prediction of Bores and Bore-Initiated Convection
Hristo Georgiev Chipilski, Univ. of Oklahoma, Norman, OK; and X. Wang and D. B. Parsons

842
The Relationship between the Summertime Great Plains Low-Level Jet and Shear-Generated Turbulence and Fluxes in the Nocturnal Stable Boundary Layer
Megan McAuliffe, University of California, Davis, CA; and K. T. Paw U

843
The Use of PECAN Observations to Verify MCS Cold Pools Simulated with Varying Horizontal Grid Spacing
Brian Joseph Squitieri, Iowa State Univ., Ames, IA; and W. A. Gallus Jr.

844
Comparison of Moisture and Temperature Profiles during PECAN
Segayle C. Thompson, Howard Univ., Washington, DC; and S. C. Thompson

Wednesday, 10 January 2018

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12:00 PM-1:30 PM: Wednesday, 10 January 2018


Lunch Break
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