Results 31 to 40 of about 534 (178)
Possible Role Of The Storm-Generated Streamwise Vorticity In Tornado Intensification And Evolution [PDF]
, 2022 Streamwise vorticity developing within the forward flank (FF) of supercell thunderstorms has been found to modulate the intensity of the low-level mesocyclone. However, few studies have quantitatively investigated FF vorticity contributions to low-level
Wilson, Lance Reed
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暴雨灾害, 2022 Reflectivity and Doppler velocity measurements from the new generation weather radar provide important input for the identification and early warning of severe storms and tornadoes.
Yanjiao XIAO +3 more
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A Reassessment of the Percentage of Tornadic Mesocyclones
Weather and Forecasting, 2005 Abstract A large set of data collected by numerous Weather Surveillance Radar-1988 Doppler (WSR-88D) units around the United States was analyzed to reassess the percentage of tornadic mesocyclones. Out of the 5322 individual mesocyclone detections that satisfied the relatively stringent WSR-88D Mesocyclone Detection Algorithm objective ...
Robert J. Trapp +2 more
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Preliminary study on the causes of a downburst event in Tianjin in the summer of 2017
暴雨灾害, 2022 A severe thunderstorm gale event with several short-term rainfall,hail and downburst occurred in the southwest of Tianjin on 9 July 2017, during which two downbursts attacked successively Duliu Town,Jinghai District,Tianjin.
Yanchun WANG +4 more
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Tornado detection with support vector machines [PDF]
, 2003 . The National Weather Service (NWS) Mesocyclone Detec-tion Algorithms (MDA) use empirical rules to process velocity data from the Weather Surveillance Radar 1988 Doppler (WSR-88D).
Theodore B. Trafalis +2 more
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Radar-Detected Mesocyclone Tilt in Tornadic and Nontornadic Supercells [PDF]
, 2019 While supercell thunderstorms are the storms with the greatest potential of producing tornadoes, the majority of supercells do not produce tornadoes. Recent work has demonstrated that low-level (LL) vertical wind shear and lifting condensation level (LCL)
Serino, Michelle Marie
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An Automated Method for Depicting Mesocyclone Paths and Intensities [PDF]
Weather and Forecasting, 2013 Abstract The location and intensity of mesocyclone circulations can be tracked in real time by accumulating azimuthal shear values over time at every location of a uniform spatial grid. Azimuthal shear at low (0–3 km AGL) and midlevels (3–6 km AGL) of the atmosphere is computed in a noise-tolerant manner by fitting the Doppler velocity ...
Travis M. Smith +2 more
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A Winter Mesocyclone over the Midwestern United States [PDF]
Weather and Forecasting, 1988 Abstract A diagonostic analysis is made of a midwinter mesoscale vortex that developed over the Mississippi Valley and produced moderate to heavy snow with gale force winds (>18 m s−1), lightning, and thunder along a narrow track approximately 1500 km in length. The mesoscale vortex resembled the so-called “polar lows” that form over the subpolar seas.
Boniface J. Mils, John E. Walsh
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Meteorologische Zeitschrift, 2001 Development mechanisms of Antarctic mesocyclones in the eastern Weddell Sea area are examined by means of simulations with a mesoscale model using different idealized initial conditions.
Thomas Klein, Günther Heinemann
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MESOCYCLONE OBSERVATION BY MULTI-PARAMETER METEOROLOGICAL RADAR
HYDROMETEOROLOGY AND ECOLOGY. PROCEEDINGS OF THE RUSSIAN STATE HYDROMETEOROLOGICAL UNIVERSITY, 2020 The article deals in detail with the case of observation of a cloud array characterized by a large (15 km) height of the upper boundary of cloud cover and the presence of areas with radar reflectivity of more than 60 dBZ by the DMRL-S meteorological radar installed in Valday (Novgorod region).
D.A. Denisenkov +2 more
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