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Dual multiparameter radar observations of intense convective storms: The 24 June 1992 case study

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Summary

Data from two multiparameter radars are used to diagnose some microphysical characteristics of intense convective storms, in particular, the 24 June 1992 case near Fort Collins and Greeley, Colorado. Dual-polarization and dual-frequency radar measurements from the CSU-CHILL and NCAR/CP-2 radars provided the basis for microphysical interpretations. Supporting in-situ measurements were provided by several T-28 aircraft penetrations of updraft regions.

Limited dual-Doppler synthesis as well as surface mesoscale features showed persistent regions of convergence and advection of moist air along the northeast side of the storm complex. The Fort Collins storm was analyzed in detail over its duration including an intercomparison of rainfall rates from raingage and as deduced from specific differential phase and attenuation measurements. Vertical sections of radar data taken parallel and perpendicular to the surface convergence axis showed interesting features such as positiveZ dr and attenuation columns with an LDR ‘cap’ on the inflow side. Such columns provide evidence of the important role of warm cloud processes in this storm. NCAR/CP-2 radar data from a multi-cellular storm in central Florida are also analyzed as a contrast to the 24 June Colorado case.

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  1. V. N. Bringi, L. Liu, P. C. Kennedy, V. Chandrasekar & S. A. Rutledge

    Present address: Department of Electrical Engineering and Atmospheric Science, Colorado State University, 80523, Fort Collins, Colorado, USA

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    1. V. N. Bringi
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    2. L. Liu
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    3. P. C. Kennedy
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    4. V. Chandrasekar
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    5. S. A. Rutledge
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    Bringi, V.N., Liu, L., Kennedy, P.C. et al. Dual multiparameter radar observations of intense convective storms: The 24 June 1992 case study. Meteorl. Atmos. Phys. 59, 3–31 (1996). https://doi.org/10.1007/BF01031999

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