Results 51 to 60 of about 338 (126)
Tornado Seasonality in Central‐Southern Chile
Geophysical Research Letters, Volume 52, Issue 1, 16 January 2025.Abstract Tornado records in Chile show an apparent seasonality with a peak between May and June. We study this seasonality in central‐south and austral Chile by analyzing three indicators of tornado environments: vorticity generation parameter (VGP), storm‐relative helicity (SRH) and mean relative humidity RH‾ $\left(\overline{RH}\right)$.
V. Caballero‐Morán, R. Rondanelli
wiley +1 more source
Tornadogenesis with and without a Dynamic Pipe Effect
Journal of the Atmospheric Sciences, 1997 Abstract A dynamic pipe effect (DPE) has been used previously to explain the descent from aloft of tornadic vortex signatures (TVSs), and presumably embryonic tornadoes, prior to the near-ground spinup of the tornado. But for many tornadoes the TVS appears to form simultaneously over a depth spanning the lowest few kilometers. A numerical model is used
R. Jeffrey Trapp, Robert Davies-Jones
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Factors contributing to tornadogenesis in landfalling Gulf of Mexico tropical cyclones [PDF]
Meteorological Applications, 2014 ABSTRACTTropical cyclone tornadoes (TCTs) are brief and often unpredictable events that can produce fatalities and create considerable economic loss. Given these uncertainties, it is important to understand the characteristics and factors that contribute to tornado formation within tropical cyclones.
Cory L. Rhodes, Jason C. Senkbeil
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Drivers of Cold Frontal Hourly Extreme Precipitation: A Climatological Study Over Europe
Geophysical Research Letters, Volume 51, Issue 20, 28 October 2024.Abstract In the mid‐latitudes extreme precipitation events are strongly associated with cold fronts. By exploring drivers across different scales and relating them to precipitation, we aim to improve our understanding of processes influencing cold frontal extremes.
Armin Schaffer +5 more
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Supercells and Tornado‐Like Vortices in an Idealized Global Atmosphere Model
Earth and Space Science, Volume 11, Issue 5, May 2024.Abstract We investigate the representation of individual supercells and intriguing tornado‐like vortices in a simplified, locally refined global atmosphere model. The model, featuring grid stretching, can locally enhance the model resolution and reach cloud‐resolving scales with modest computational resources.
Kai‐Yuan Cheng +3 more
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ERA5‐Based Significant Tornado Environments in Canada Between 1980 and 2020
Journal of Geophysical Research: Atmospheres, Volume 129, Issue 8, 28 April 2024.Abstract This study uses ERA5 close‐proximity soundings and associated convective parameters to characterize significant tornadic storm (F/EF2+) environments between 1980 and 2020 in parts of Canada. It is shown that ERA5 convective parameters are suitable to represent observed parameters, based on radiosonde comparisons.
John Hanesiak +4 more
wiley +1 more source
A Clarification of Vortex Breakdown and Tornadogenesis
Monthly Weather Review, 2000 Recent and past observations of a central downdraft within a mesocyclone have been misinterpreted as evidence of vortex breakdown on the mesocyclone scale. In this note, the literature is reviewed and model examples are provided in order to demonstrate that the mesocyclone dynamics likely precludes mesocyclonic vortex breakdown.
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Multi‐Platform Observations of Severe Typhoon Koinu
Earth and Space Science, Volume 11, Issue 3, March 2024.Abstract Severe Typhoon Koinu passed south of Hong Kong on 8 and 9 October 2023, triggering the issuance of the Increasing Gale or Storm Signal No. 9, the second highest tropical cyclone (TC) warning signal in Hong Kong. Koinu was a difficult case for TC warning service due to its compact size and rather erratic movement over the coastal waters of ...
J. Y. He +9 more
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Synoptic‐scale and mesoscale controls for tornadogenesis on cold fronts: A generalised measure of tornado risk and identification of synoptic types [PDF]
, 2020 Matthew R. Clark, Douglas J. Parker
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Meteorological Applications, Volume 31, Issue 1, January/February 2024.This study presents a comparison of two similar recurving typhoons of which Typhoon Yagi (2018) produces an outbreak of tornado while Typhoon In‐Fa (2021) produces none of tornado. The greatest difference in regards of large‐scale conditions between these two typhoons is the thermodynamic instability owing to the different lower–middle‐tropospheric ...
Zhaoming Li +3 more
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