TY - JOUR
T1 - Multiple-platform and multiple-doppler radar observations of a supercell thunderstorm in south america during relampago
AU - TRAPP, ROBERT J.
AU - KOSIBA, KAREN A.
AU - MARQUIS, JAMES N.
AU - KUMJIAN, MATTHEW R.
AU - NESBITT, STEPHEN W.
AU - WURMAN, JOSHUA
AU - SALIO, PAOLA
AU - GROVER, MAXWELL A.
AU - ROBINSON, PAUL
AU - HENCE, DEANNA A.
N1 - Funding Information:
Acknowledgments. This work was supported in part by the National Science Foundation (NSF) Grants AGS-1661800 (Trapp and Hence), AGS-1661548 (Kosiba and Wurman), AGS-1661707 (Marquis), AGS-1661679 (Kumjian), AGS-1661799 (Nesbitt); the U.S. Department of Energy Atmospheric System Research (Marquis); and Argentinean projects PICT 2017-0221, PICT 2016-0710 and UBACyT 20020170100164BA (Salio). The Secretaria de Politicas Universitarias Res 2018-29 and INVAP S.E. is thanked for their contributions to participate in the field campaign. The CSWR DOW facility is part of the NSF LAOF and is funded by AGS-1361237. CACTI instrumentation is supported by the Atmospheric Radiation Measurement program. RMA1 data were provided by Secretaría de Infraestructura y Política Hídrica, Ministerio del Interior, Obras Públicas y Vivienda of the Argentinean National Government framed within the SINARAME Project, which is an Argentinean effort to expand the radar network over the whole country. The Python ARM Radar Toolkit (http://doi.org/10.5334/jors.119) was used to create some of the figures. A large team consisting of researchers, operational and research forecasters, instrument crews and technical staff, various government agencies and academic institutions in Argentina, and the supportive residents of the observational domain were critical to making this IOP and other data collection during RELAMPAGO a success. Comments and suggestions made by the three anonymous reviewers of this manuscript helped improve the description and meteorological importance of the IOP4 data.
Publisher Copyright:
© 2020 American Meteorological Society.
PY - 2020/8
Y1 - 2020/8
N2 - On 10 November 2018, during the RELAMPAGO field campaign in Argentina, South America, a thunderstorm with supercell characteristics was observed by an array of mobile observing instruments, including three Doppler on Wheels radars. In contrast to the archetypal supercell described in the Glossary of Meteorology, the updraft rotation in this storm was rather short lived (;25 min), causing some initial doubt as to whether this indeed was a supercell. However, retrieved 3D winds from dual-Doppler radar scans were used to document a high spatial correspondence between midlevel vertical velocity and vertical vorticity in this storm, thus providing evidence to support the supercell categorization. Additional data collected within theRELAMPAGOdomain revealed other storms with this behavior, which appears to be attributable in part to effects of the local terrain. Specifically, the IOP4 supercell and other short-duration supercell cases presented had storm motions that were nearly perpendicular to the long axis of the Sierras de Córdoba Mountains; a long-duration supercell case, on the other hand, had a storm motion nearly parallel to these mountains. Sounding observations as well as model simulations indicate that a mountain-perpendicular storm motion results in a relatively short storm residence time within the narrow zone of terrain-enhanced vertical wind shear. Such a motion and short residence time would limit the upward tilting, by the left-moving supercell updraft, of the storm-relative, antistreamwise horizontal vorticity associated with anabatic flow near complex terrain.
AB - On 10 November 2018, during the RELAMPAGO field campaign in Argentina, South America, a thunderstorm with supercell characteristics was observed by an array of mobile observing instruments, including three Doppler on Wheels radars. In contrast to the archetypal supercell described in the Glossary of Meteorology, the updraft rotation in this storm was rather short lived (;25 min), causing some initial doubt as to whether this indeed was a supercell. However, retrieved 3D winds from dual-Doppler radar scans were used to document a high spatial correspondence between midlevel vertical velocity and vertical vorticity in this storm, thus providing evidence to support the supercell categorization. Additional data collected within theRELAMPAGOdomain revealed other storms with this behavior, which appears to be attributable in part to effects of the local terrain. Specifically, the IOP4 supercell and other short-duration supercell cases presented had storm motions that were nearly perpendicular to the long axis of the Sierras de Córdoba Mountains; a long-duration supercell case, on the other hand, had a storm motion nearly parallel to these mountains. Sounding observations as well as model simulations indicate that a mountain-perpendicular storm motion results in a relatively short storm residence time within the narrow zone of terrain-enhanced vertical wind shear. Such a motion and short residence time would limit the upward tilting, by the left-moving supercell updraft, of the storm-relative, antistreamwise horizontal vorticity associated with anabatic flow near complex terrain.
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U2 - 10.1175/MWR-D-20-0125.1
DO - 10.1175/MWR-D-20-0125.1
M3 - Article
AN - SCOPUS:85091147854
SN - 0027-0644
VL - 148
SP - 3225
EP - 3241
JO - Monthly Weather Review
JF - Monthly Weather Review
IS - 8
ER -