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dc.contributor.author
Vicencio, José
dc.contributor.author
Rondanelli, Roberto
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Campos, Diego
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Valenzuela, Raúl
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Garreaud, René
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Reyes, Alejandra
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Padilla, Rodrigo
dc.contributor.author
Abarca, Ricardo
dc.contributor.author
Barahona, Camilo
dc.contributor.author
Delgado, Rodrigo
dc.contributor.author
Nicora, Maria Gabriela
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dc.date.available
2021-10-15T17:56:54Z
dc.date.issued
2021-03-01
dc.identifier.citation
Vicencio, José; Rondanelli, Roberto; Campos, Diego; Valenzuela, Raúl; Garreaud, René; et al.; The chilean tornado outbreak of may 2019: Synoptic, mesoscale, and historical contexts; Amer Meteorological Soc; Bulletin of The American Meteorological Society; 102; 3; 1-3-2021; E611-E634
dc.identifier.issn
0003-0007
dc.identifier.uri
http://hdl.handle.net/11336/143890
dc.description.abstract
In late May 2019, at least seven tornadoes were reported within a 24-h period in southern Chile (western South America, 36°–38°S), including EF1 and EF2 events causing substantial damage to infrastructure, dozens of injuries, and one fatality. Despite anecdotal evidence and chronicles of similar historical events, the threat from tornadoes in Chile was regarded with skepticism until the 2019 outbreak. Herein, we describe the synoptic-scale features instrumental in the development of these tornadic storms, including an extended southwest–northeast trough along the South Pacific, with a large postfrontal instability area. Tornadic storms appear to be embedded in a modestly unstable environment (positive convective available potential energy but less than 1,000 J kg−1) and strong low- and midlevel wind shear, with high near-surface storm-relative helicity values (close to −200 m2 s−2), clearly differing from the Great Plains tornadoes in North America (with highly unstable environments) but resembling cold-season tornadoes previously observed in the midlatitudes of North America, Australia, and Europe. Reanalyzing rainfall and lightning data from the last 10 years, we found that tornadic storms in our region occur associated with locally extreme values of both CAPE and low-level wind shear, where a combination of the two in a low-level vorticity generation parameter appears as a simple first-order discriminant between tornadic and nontornadic environments. Future research should thoroughly examine historical events worldwide to assemble a database of high-shear, low-CAPE midlatitude storms and help improve our understanding of these storms’ underlying physics.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Amer Meteorological Soc
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
tornado
dc.subject
Synoptic,
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mesoscale
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lightning
dc.subject.classification
Meteorología y Ciencias Atmosféricas
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
The chilean tornado outbreak of may 2019: Synoptic, mesoscale, and historical contexts
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2021-09-07T20:00:30Z
dc.journal.volume
102
dc.journal.number
3
dc.journal.pagination
E611-E634
dc.journal.pais
Estados Unidos
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dc.journal.ciudad
Boston
dc.description.fil
Fil: Vicencio, José. Universidad de Chile; Chile. Dirección Meteorológica de Chile; Chile
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Fil: Rondanelli, Roberto. Universidad de Chile; Chile. Center for Climate and Resilience Research; Chile
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Fil: Campos, Diego. Dirección Meteorológica de Chile; Chile. Universidad de Chile; Chile
dc.description.fil
Fil: Valenzuela, Raúl. Center for Climate and Resilience Research; Chile. Universidad de O’Higgins; Chile
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Fil: Garreaud, René. Center for Climate and Resilience Research; Chile
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Fil: Reyes, Alejandra. Dirección Meteorológica de Chile; Chile
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Fil: Padilla, Rodrigo. Dirección Meteorológica de Chile; Chile
dc.description.fil
Fil: Abarca, Ricardo. Dirección Meteorológica de Chile; Chile
dc.description.fil
Fil: Barahona, Camilo. Dirección Meteorológica de Chile; Chile
dc.description.fil
Fil: Delgado, Rodrigo. Dirección Meteorológica de Chile; Chile
dc.description.fil
Fil: Nicora, Maria Gabriela. Instituto Franco-argentino Sobre Estudios del Clima y Sus Impactos.; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Investigación y Desarrollo Estratégico para la Defensa. Ministerio de Defensa. Unidad de Investigación y Desarrollo Estratégico para la Defensa; Argentina
dc.journal.title
Bulletin of The American Meteorological Society
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://journals.ametsoc.org/view/journals/bams/aop/BAMS-D-19-0218.1/BAMS-D-19-0218.1.xml
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1175/BAMS-D-19-0218.1
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