Analysis of a Rare Weather of Large Hail for Using Doppler Radar Data
Abstract：By use of conventional data and Doppler radar data, the hail process on the June 24, 2011 in Luoyang Song county was analyzed. The results show that the heavy hail is due to high-altitude vertical cross-slot switch, dry cold air intrusion, strong easterly winds in the low-level convergence, con- vergence of warm air rise, which provides favorable power and water vapor conditions for the occurrenceof hail. The high-altitude cold advection, low-level warm advection, provides unstable stratification for the occurrence of severe convective weather. The 0 ℃ layer height which is suitable for the development and generated of hail, the various types of index which is conducive to the convection development, pro- vides a good basis for the analysis and prediction of hail. The early radar echo signal caused by the weather provides reference information for judging convective weather nature and monitoring and early warning. The intensity over 55 dBz echo height is higher than - 20℃height, VIL values is over 60 kg/ m^2, echo top height is over 12 km and mesocycyclone is appear are reliable hail signal.
Keywords：large hailhigh-altitude cold vortexhorizontal tankthe radar echo characteristics
Publication Date：2012-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：5( 62-66 )