@article{peters_chavas_su_morrison_coffer_2023, title={An Analytic Formula for Entraining CAPE in Midlatitude Storm Environments}, volume={80}, ISSN={["1520-0469"]}, DOI={10.1175/JAS-D-23-0003.1}, abstractNote={Abstract}, number={9}, journal={JOURNAL OF THE ATMOSPHERIC SCIENCES}, author={Peters, John M. and Chavas, Daniel R. and Su, Chun -Yian and Morrison, Hugh and Coffer, Brice E.}, year={2023}, month={Sep}, pages={2165–2186} }
 @article{peters_coffer_parker_nowotarski_mulholland_nixon_allen_2023, title={Disentangling the Influences of Storm-Relative Flow and Horizontal Streamwise Vorticity on Low-Level Mesocyclones in Supercells}, volume={80}, ISSN={["1520-0469"]}, DOI={10.1175/JAS-D-22-0114.1}, abstractNote={Abstract}, number={1}, journal={JOURNAL OF THE ATMOSPHERIC SCIENCES}, author={Peters, John M. M. and Coffer, Brice E. E. and Parker, Matthew D. D. and Nowotarski, Christopher J. J. and Mulholland, Jake P. P. and Nixon, Cameron J. J. and Allen, John T. T.}, year={2023}, month={Jan}, pages={129–149} }
 @article{loeffler_kumjian_markowski_coffer_parker_2023, title={Investigating the Relationship between Polarimetric Radar Signatures of Hydrometeor Size Sorting and Tornadic Potential in Simulated Supercells}, volume={151}, ISSN={["1520-0493"]}, DOI={10.1175/MWR-D-22-0228.1}, abstractNote={Abstract}, number={7}, journal={MONTHLY WEATHER REVIEW}, author={Loeffler, Scott D. and Kumjian, Matthew R. and Markowski, Paul M. and Coffer, Brice E. and Parker, Matthew D.}, year={2023}, month={Jul}, pages={1863–1884} }
 @article{coffer_parker_peters_wade_2023, title={Supercell Low-Level Mesocyclones: Origins of Inflow and Vorticity}, volume={151}, ISSN={["1520-0493"]}, DOI={10.1175/MWR-D-22-0269.1}, abstractNote={Abstract}, number={9}, journal={MONTHLY WEATHER REVIEW}, author={Coffer, Brice E. and Parker, Matthew D. and Peters, John M. and Wade, Andrew R.}, year={2023}, month={Sep}, pages={2205–2232} }
 @article{coffer_parker_2022, title={Infrasound signals in simulated nontornadic and pre-tornadic supercells}, volume={151}, ISSN={["1520-8524"]}, DOI={10.1121/10.0009400}, abstractNote={There has been increased interest in improving severe weather detection by supplementing the conventional operational radar network with an infrasound observation network, which may be able to detect distinct sub-audible signatures from tornadic supercells. While there is evidence that tornadic thunderstorms exhibit observable infrasound signals, what is not well-understood is whether these infrasound signals are unique to tornadic supercells (compared to nontornadic supercells) or whether there is useful signal prior to tornadogenesis, which would be most relevant to forecasters. Using simulations of supercells, tailored to represent acoustic waves with frequencies from 0.1 to 2 Hz, spectral analysis reveals that both nontornadic and pre-tornadic supercells produce strikingly similar sound pressure levels at the surface, even in close spatial proximity to the storms (less than 20 km). Sensitivity tests employing varying microphysics schemes also show similar acoustic emissions between supercells. Riming of supercooled water droplets in the upper-troposphere is the sole mechanism generating high-frequency pressure waves in supercells prior to tornadogenesis or during tornadogenesis-failure; however, riming occurs continuously in mature nontornadic and tornadic supercells. Our simulations found no clear evidence that infrasound produced by supercells prior to tornado formation (compared to nontornadic supercells) is sufficiently distinct to improve lead-time of tornado warnings.}, number={2}, journal={JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA}, author={Coffer, Brice E. and Parker, Matthew D.}, year={2022}, month={Feb}, pages={939–954} }
 @article{flournoy_coniglio_rasmussen_furtado_coffer_2020, title={Modes of Storm-Scale Variability and Tornado Potential in VORTEX2 Near- and Far-Field Tornadic Environments}, volume={148}, ISSN={["1520-0493"]}, DOI={10.1175/MWR-D-20-0147.1}, abstractNote={Abstract}, number={10}, journal={MONTHLY WEATHER REVIEW}, author={Flournoy, Matthew D. and Coniglio, Michael C. and Rasmussen, Erik N. and Furtado, Jason C. and Coffer, Brice E.}, year={2020}, month={Oct}, pages={4185–4207} }
 @article{coffer_taszarek_parker_2020, title={Near Ground Wind Profiles of Tornadic and Nontornadic Environments in the United States and Europe from ERAS Reanalyses}, volume={35}, ISSN={["1520-0434"]}, DOI={10.1175/WAF-D-20-0153.1}, abstractNote={Abstract}, number={6}, journal={WEATHER AND FORECASTING}, author={Coffer, Brice E. and Taszarek, Mateusz and Parker, Matthew D.}, year={2020}, month={Dec}, pages={2621–2638} }
 @article{coffer_parker_thompson_smith_jewell_2019, title={Using Near-Ground Storm Relative Helicity in Supercell Tornado Forecasting}, volume={34}, ISSN={["1520-0434"]}, DOI={10.1175/WAF-D-19-0115.1}, abstractNote={Abstract}, number={5}, journal={WEATHER AND FORECASTING}, author={Coffer, Brice E. and Parker, Matthew D. and Thompson, Richard L. and Smith, Bryan T. and Jewell, Ryan E.}, year={2019}, month={Oct}, pages={1417–1435} }
 @article{coffer_markowski_2018, title={Comments on "The Regulation of Tornado Intensity by Updraft Width"}, volume={75}, DOI={10.1175/JAS-D-18-0170.1}, abstractNote={In a recent article, Trapp et al. (2017, hereinafter T17) presented a theoretical case based on Kelvin’s circulation theorem to argue that wider updrafts are more likely to be associated with strong to violent tornadoes [enhanced Fujita (EF) ratings. 2] than narrower updrafts. They then presented idealized numerical simulations of supercell thunderstorms to support their contention. In their suite of simulated supercells, updraft area was highly correlated with midlevel mesocyclone area, downdraft area, and near-ground vertical vorticity magnitude. Larger midlevel mesocyclones were also strongly correlated with larger near-ground mesocyclones. The implications of their findings are potentially important, owing to the possibility of routinely measuring updraft widths in satellite imagery. Herein, we hope to shed additional light on the generality of their findings by presenting the relationships between updraft, downdraft, and mesocyclone area from a higher-resolution ensemble of nontornadic and tornadic supercells.}, number={11}, journal={JOURNAL OF THE ATMOSPHERIC SCIENCES}, author={Coffer, Brice E. and Markowski, Paul M.}, year={2018}, pages={4049–4056} }
 @article{coffer_parker_dahl_wicker_clark_2017, title={Volatility of Tornadogenesis: An Ensemble of Simulated Nontornadic and Tornadic Supercells in VORTEX2 Environments}, volume={145}, ISSN={["1520-0493"]}, DOI={10.1175/mwr-d-17-0152.1}, abstractNote={ Despite an increased understanding of the environments that favor tornado formation, a high false-alarm rate for tornado warnings still exists, suggesting that tornado formation could be a volatile process that is largely internal to each storm. To assess this, an ensemble of 30 supercell simulations was constructed based on small variations to the nontornadic and tornadic environmental profiles composited from the second Verification of the Origins of Rotation in Tornadoes Experiment (VORTEX2). All simulations produce distinct supercells despite occurring in similar environments. Both the tornadic and nontornadic ensemble members possess ample subtornadic surface vertical vorticity; the determinative factor is whether this vorticity can be converged and stretched by the low-level updraft. Each of the 15 members in the tornadic VORTEX2 ensemble produces a long-track, intense tornado. Although there are notable differences in the precipitation and near-surface buoyancy fields, each storm features strong dynamic lifting of surface air with vertical vorticity. This lifting is due to a steady low-level mesocyclone, which is linked to the ingestion of predominately streamwise environmental vorticity. In contrast, each nontornadic VORTEX2 simulation features a supercell with a disorganized low-level mesocyclone, due to crosswise vorticity in the lowest few hundred meters in the nontornadic environment. This generally leads to insufficient dynamic lifting and stretching to accomplish tornadogenesis. Even so, 40% of the nontornadic VORTEX2 ensemble members become weakly tornadic. This implies that chaotic within-storm details can still play a role and, occasionally, lead to marginally tornadic vortices in suboptimal storms. }, number={11}, journal={MONTHLY WEATHER REVIEW}, author={Coffer, Brice E. and Parker, Matthew D. and Dahl, Johannes M. L. and Wicker, Louis J. and Clark, Adam J.}, year={2017}, month={Nov}, pages={4605–4625} }
 @article{rohi_ramezani_rahmaninia_zabihzadeh_hubbe_2016, title={Influence of pulp suspension ph on the performance of chitosan as a strength agent for hardwood cmp paper}, volume={50}, number={7-8}, journal={Cellulose Chemistry and Technology}, author={Rohi, M. and Ramezani, O. and Rahmaninia, M. and Zabihzadeh, S. M. and Hubbe, M. A.}, year={2016}, pages={873–878} }
 @article{coffer_parker_2015, title={Impacts of Increasing Low-Level Shear on Supercells during the Early Evening Transition}, volume={143}, ISSN={["1520-0493"]}, DOI={10.1175/mwr-d-14-00328.1}, abstractNote={Abstract}, number={5}, journal={MONTHLY WEATHER REVIEW}, author={Coffer, Brice E. and Parker, Matthew D.}, year={2015}, month={May}, pages={1945–1969} }
 @article{clark_coniglio_coffer_thompson_xue_kong_2015, title={Sensitivity of 24-h Forecast Dryline Position and Structure to Boundary Layer Parameterizations in Convection-Allowing WRF Model Simulations}, volume={30}, ISSN={["1520-0434"]}, DOI={10.1175/waf-d-14-00078.1}, abstractNote={Abstract}, number={3}, journal={WEATHER AND FORECASTING}, author={Clark, Adam J. and Coniglio, Michael C. and Coffer, Brice E. and Thompson, Greg and Xue, Ming and Kong, Fanyou}, year={2015}, month={Jun}, pages={613–638} }
 @article{coffer_maudlin_veals_clark_2013, title={Dryline Position Errors in Experimental Convection-Allowing NSSL-WRF Model Forecasts and the Operational NAM}, volume={28}, ISSN={["0882-8156"]}, DOI={10.1175/waf-d-12-00092.1}, abstractNote={Abstract}, number={3}, journal={WEATHER AND FORECASTING}, author={Coffer, Brice E. and Maudlin, Lindsay C. and Veals, Peter G. and Clark, Adam J.}, year={2013}, month={Jun}, pages={746–761} }