Diagnostic Analysis of a Short-term Strong Precipitation in 2009 in Xinxiang
Abstract：Using high-altitude ground observation data, the Puyang station Doppler radar data and the NCEP 6 h 1°×1°reanalysis data, from the weather situation, physical field distribution characteris-tics, unstable energy and the radar echo evolution, this paper analyzes the process evolution and causes of the short-term strong precipitation on June 6, 2009 in Xinxiang. The results showed that : by the influ-ence of the warm tongue extending from the southwest, the middle and low-level continued warming which is conducive to the accumulation of unstable energy. The cold air came from the upper eastward to the south, which invaded in the lower back of the northeast cold vortex and near-surface. These factors stim-ulated the unstable energy, resulting in severe convective weather. The analysis also found that it was a good correlation between severe convective weather areas and the physical field of high energy region in the lower θse, water vapor flux large values region, and the strong convergence rise region.
Keywords：NCEP datawater vapor fluxcold advectionconvergence zone
Publication Date：2012-08-07
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：7( 33-39 )