Search Results

You are looking at 1 - 10 of 12 items for :

  • Microwave observations x
  • RELAMPAGO-CACTI: High Impact Weather in Subtropical South America x
  • Refine by Access: All Content x
Clear All
Zachary S. Bruick, Kristen L. Rasmussen, and Daniel J. Cecil

Argentina. With time, this will be a promising avenue to explore hail within this region, but currently the data record is not extensive enough for a thorough analysis. Fig . 1. Southern South America with topography shaded and the study area outlined. As a result, the most comprehensive way to examine the climatology of hail in subtropical South America and compare these results to other parts of the world is to use passive microwave satellite observations of ice hydrometeors. These measurements have

Free access
Zhe Feng, Adam Varble, Joseph Hardin, James Marquis, Alexis Hunzinger, Zhixiao Zhang, and Mandana Thieman

relative importance of various factors that impact deep convection initiation (CI) and growth are difficult to examine in observations, partly because factors are correlated and interact across a variety of spatiotemporal scales. In addition, comprehensive observations of near-cloud ambient conditions leading up to CI and subsequent evolution of convection are very limited, owing to the difficulty to target the precise location and timing of CI in a highly heterogeneous mesoscale environment. Several

Open access
Adam C. Varble, Stephen W. Nesbitt, Paola Salio, Joseph C. Hardin, Nitin Bharadwaj, Paloma Borque, Paul J. DeMott, Zhe Feng, Thomas C. J. Hill, James N. Marquis, Alyssa Matthews, Fan Mei, Rusen Öktem, Vagner Castro, Lexie Goldberger, Alexis Hunzinger, Kevin R. Barry, Sonia M. Kreidenweis, Greg M. McFarquhar, Lynn A. McMurdie, Mikhail Pekour, Heath Powers, David M. Romps, Celeste Saulo, Beat Schmid, Jason M. Tomlinson, Susan C. van den Heever, Alla Zelenyuk, Zhixiao Zhang, and Edward J. Zipser

Period (15 October 2018–30 April 2019), and a 1.5-month intensive observation period (IOP; 1 November–15 December 2018) that included Gulfstream-1 (G-1) aircraft flights. The campaign overlapped with the collaborating multi-agency, National Science Foundation (NSF)-led Remote Sensing of Electrification, Lightning, and Mesoscale/Microscale Processes with Adaptive Ground Observations (RELAMPAGO) field campaign [see companion article by Nesbitt et al. (2021) ]. The processes targeted by CACTI

Full access
Stephen W. Nesbitt, Paola V. Salio, Eldo Ávila, Phillip Bitzer, Lawrence Carey, V. Chandrasekar, Wiebke Deierling, Francina Dominguez, Maria Eugenia Dillon, C. Marcelo Garcia, David Gochis, Steven Goodman, Deanna A. Hence, Karen A. Kosiba, Matthew R. Kumjian, Timothy Lang, Lorena Medina Luna, James Marquis, Robert Marshall, Lynn A. McMurdie, Ernani de Lima Nascimento, Kristen L. Rasmussen, Rita Roberts, Angela K. Rowe, Juan José Ruiz, Eliah F.M.T. São Sabbas, A. Celeste Saulo, Russ S. Schumacher, Yanina Garcia Skabar, Luiz Augusto Toledo Machado, Robert J. Trapp, Adam C. Varble, James Wilson, Joshua Wurman, Edward J. Zipser, Ivan Arias, Hernán Bechis, and Maxwell A. Grover

, mesoscale convective systems, multicell storms), and conceptual models of storm life cycle and life cycle transitions and their associated hazard probabilities, generated from U.S. storms consistent across global regions? How do proxies for severe storm frequency from satellites and large-scale models compare with detailed observations in severe storms, particularly in regions where the physical processes producing severe weather may differ? The answers to these questions ultimately impact our ability

Full access
Robert J. Trapp, Karen A. Kosiba, James N. Marquis, Matthew R. Kumjian, Stephen W. Nesbitt, Joshua Wurman, Paola Salio, Maxwell A. Grover, Paul Robinson, and Deanna A. Hence

.5439/1482619 . 10.5439/1482619 Bang , S. D. , and D. J. Cecil , 2019 : Constructing a multifrequency passive microwave hail retrieval and climatology in the GPM domain . J. Appl. Meteor. Climatol. , 58 , 1889 – 1904 , . 10.1175/JAMC-D-19-0042.1 Blair , S. F. , and Coauthors , 2017 : High-resolution hail observations: Implications for NWS warning operations . Wea. Forecasting , 32 , 1101 – 1119 , . 10.1175/WAF-D-16

Free access
Russ S. Schumacher, Deanna A. Hence, Stephen W. Nesbitt, Robert J. Trapp, Karen A. Kosiba, Joshua Wurman, Paola Salio, Martin Rugna, Adam C. Varble, and Nathan R. Kelly

1. Introduction Subtropical South America, and in particular the La Plata basin of Argentina, has been identified as a region with some of the most intense convective storms on the planet. In particular, observations from the TRMM satellite have shown that especially deep and wide convective systems occur in this region ( Zipser et al. 2006 ; Romatschke and Houze 2010 ; Liu and Zipser 2015 ; Houze et al. 2015 ), and these storms produce a very large proportion of the annual rainfall for this

Full access
Sujan Pal, Francina Dominguez, María Eugenia Dillon, Javier Alvarez, Carlos Marcelo Garcia, Stephen W. Nesbitt, and David Gochis

et al. 2018 ), affecting the Carcarañá River basin, a subbasin of the La Plata River basin. As such, the mountainous headwater region of this basin ( Fig. 1 ) is ideally suited to perform hydrometeorological studies of convection and flash flooding. To measure these intense convective storms and associated impacts, the Remote Sensing of Electrification, Lightning and Mesoscale/Microscale Processes with Adaptive Ground Observations (RELAMPAGO, https

Full access
Jeremiah O. Piersante, Kristen L. Rasmussen, Russ S. Schumacher, Angela K. Rowe, and Lynn A. McMurdie

1. Introduction Thunderstorms maximize in frequency and intensity near large mountain ranges ( Zipser et al. 2006 ); however, ground-based observations are historically sparse in some of these locations around the world. Fortunately, the Tropical Rainfall Measuring Mission (TRMM) Precipitation Radar (PR) has provided a robust dataset of subtropical storm characteristics. Resulting studies using TRMM PR have shown observational evidence that convective echoes east of the Andes Mountains in

Full access
Jake P. Mulholland, Stephen W. Nesbitt, Robert J. Trapp, Kristen L. Rasmussen, and Paola V. Salio

1. Introduction Satellite observations have revealed that some of the world’s most intense thunderstorms occur across subtropical South America and, more specifically, in northern and central Argentina (e.g., Zipser et al. 2006 ; Romatschke and Houze 2010 ; Cecil and Blankenship 2012 ; Houze et al. 2015 ). These thunderstorms typically develop near a secondary mountain range to the east of the Andes called the Sierras de Córdoba (SDC), and they have been associated with severe weather

Full access
Matthew R. Kumjian, Rachel Gutierrez, Joshua S. Soderholm, Stephen W. Nesbitt, Paula Maldonado, Lorena Medina Luna, James Marquis, Kevin A. Bowley, Milagros Alvarez Imaz, and Paola Salio

environment of the supercell that produced the Vivian, South Dakota, hailstone (which registers as the world record for maximum dimension: 20 cm or 8 in.) and analyzed some of the storm’s radar characteristics. Their evaluation of the environment indicated that it was indeed supportive of severe convective storms, but it was not obviously supportive of such large hail as was observed. Other studies focused on radar observations of storms producing giant or gargantuan hail. Blair et al. (2011) compared

Free access