Severe weather reports and proximity to deep convection over Northern Argentina
Conventional surface data and quantitative estimations of precipitation are used to document the occurrence and spatial distribution of severe weather phenomena associated with deep moist convection over southeastern South America.Data used in this paper are 24-hour rainfall, maximum hourly gusts an...
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todo:paper_01698095_v100_n4_p523_Matsudo2023-10-03T15:07:17Z Severe weather reports and proximity to deep convection over Northern Argentina Matsudo, C.M. Salio, P.V. Severe weather South America Spatial distribution Geostationary satellites Natural convection Satellite imagery Spatial distribution Storms Deep moist convection Geostationary operational environmental satellites Mesoscale Convective System Morphing techniques Quantitative estimation Severe weather South America Surface station Rain atmospheric convection database estimation method geostationary satellite gust mesoscale meteorology rainfall satellite imagery severe weather spatial distribution wind shear Argentina Conventional surface data and quantitative estimations of precipitation are used to document the occurrence and spatial distribution of severe weather phenomena associated with deep moist convection over southeastern South America.Data used in this paper are 24-hour rainfall, maximum hourly gusts and present weather reports from the surface station network for Argentina to the north of 40°S and cover the period 2000-2005. Hourly rainfall estimated with the CMORPH technique (CPC MORPHing technique, R. J. Joyce et al., 2004) is included in the analysis in order to increase the density of the precipitation database from January 2003 to December 2005. Extreme events are detected by means of a 95th-percentile analysis of the 24-hour rainfall and wind; values greater than 30mm and 25ms-1 respectively are considered extreme in the study area. These results are related to the presence of deep convection by considering the 235K and 218K cloud shield evolution in Geostationary Operational Environmental Satellite-12 Infrared (GOES-IR) imagery evaluated by the Forecasting and Tracking of Cloud Cluster (FORTRACC) technique. Rainfall above 30mmday-1 and present convection-related weather events tend to occur in the northeast of the country.Finally, an analysis is made of the relationship between severe phenomena and the location and lifecycle of Mesoscale Convective Systems (MCSs) defined by the 218K or 235K levels. According to the reports, favorable locations for severe weather concentrate to the northeast of the cloud shield anvil centroid although most of the cases are found in the northwest. This feature can be seen in systems with anvil areas larger than 250,000km2 in association to the predominant mid-level wind shear direction from the northwest over the area. Moreover, systems with centers located north of 30°S present a more circular shape while those to the south are more elongated with a NW-SE main axis clearly related to the presence and interaction with frontal zones over the area. Most of the events occur previous to the moment when the systems reach their maximum extension, between 2 and 10h after the initiation of the system depending on the size of the MCSs. © 2010 Elsevier B.V. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_01698095_v100_n4_p523_Matsudo |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Severe weather South America Spatial distribution Geostationary satellites Natural convection Satellite imagery Spatial distribution Storms Deep moist convection Geostationary operational environmental satellites Mesoscale Convective System Morphing techniques Quantitative estimation Severe weather South America Surface station Rain atmospheric convection database estimation method geostationary satellite gust mesoscale meteorology rainfall satellite imagery severe weather spatial distribution wind shear Argentina |
| spellingShingle |
Severe weather South America Spatial distribution Geostationary satellites Natural convection Satellite imagery Spatial distribution Storms Deep moist convection Geostationary operational environmental satellites Mesoscale Convective System Morphing techniques Quantitative estimation Severe weather South America Surface station Rain atmospheric convection database estimation method geostationary satellite gust mesoscale meteorology rainfall satellite imagery severe weather spatial distribution wind shear Argentina Matsudo, C.M. Salio, P.V. Severe weather reports and proximity to deep convection over Northern Argentina |
| topic_facet |
Severe weather South America Spatial distribution Geostationary satellites Natural convection Satellite imagery Spatial distribution Storms Deep moist convection Geostationary operational environmental satellites Mesoscale Convective System Morphing techniques Quantitative estimation Severe weather South America Surface station Rain atmospheric convection database estimation method geostationary satellite gust mesoscale meteorology rainfall satellite imagery severe weather spatial distribution wind shear Argentina |
| description |
Conventional surface data and quantitative estimations of precipitation are used to document the occurrence and spatial distribution of severe weather phenomena associated with deep moist convection over southeastern South America.Data used in this paper are 24-hour rainfall, maximum hourly gusts and present weather reports from the surface station network for Argentina to the north of 40°S and cover the period 2000-2005. Hourly rainfall estimated with the CMORPH technique (CPC MORPHing technique, R. J. Joyce et al., 2004) is included in the analysis in order to increase the density of the precipitation database from January 2003 to December 2005. Extreme events are detected by means of a 95th-percentile analysis of the 24-hour rainfall and wind; values greater than 30mm and 25ms-1 respectively are considered extreme in the study area. These results are related to the presence of deep convection by considering the 235K and 218K cloud shield evolution in Geostationary Operational Environmental Satellite-12 Infrared (GOES-IR) imagery evaluated by the Forecasting and Tracking of Cloud Cluster (FORTRACC) technique. Rainfall above 30mmday-1 and present convection-related weather events tend to occur in the northeast of the country.Finally, an analysis is made of the relationship between severe phenomena and the location and lifecycle of Mesoscale Convective Systems (MCSs) defined by the 218K or 235K levels. According to the reports, favorable locations for severe weather concentrate to the northeast of the cloud shield anvil centroid although most of the cases are found in the northwest. This feature can be seen in systems with anvil areas larger than 250,000km2 in association to the predominant mid-level wind shear direction from the northwest over the area. Moreover, systems with centers located north of 30°S present a more circular shape while those to the south are more elongated with a NW-SE main axis clearly related to the presence and interaction with frontal zones over the area. Most of the events occur previous to the moment when the systems reach their maximum extension, between 2 and 10h after the initiation of the system depending on the size of the MCSs. © 2010 Elsevier B.V. |
| format |
JOUR |
| author |
Matsudo, C.M. Salio, P.V. |
| author_facet |
Matsudo, C.M. Salio, P.V. |
| author_sort |
Matsudo, C.M. |
| title |
Severe weather reports and proximity to deep convection over Northern Argentina |
| title_short |
Severe weather reports and proximity to deep convection over Northern Argentina |
| title_full |
Severe weather reports and proximity to deep convection over Northern Argentina |
| title_fullStr |
Severe weather reports and proximity to deep convection over Northern Argentina |
| title_full_unstemmed |
Severe weather reports and proximity to deep convection over Northern Argentina |
| title_sort |
severe weather reports and proximity to deep convection over northern argentina |
| url |
http://hdl.handle.net/20.500.12110/paper_01698095_v100_n4_p523_Matsudo |
| work_keys_str_mv |
AT matsudocm severeweatherreportsandproximitytodeepconvectionovernorthernargentina AT saliopv severeweatherreportsandproximitytodeepconvectionovernorthernargentina |
| _version_ |
1807314475896799232 |