副高边缘弱冷空气侵入引发的洛阳市强对流天气过程分析
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中图分类号 P458.121
文献标志码 A
文章编号 1007-7731(2026)08-0104-04
DOI 号 10.16377/j.cnki.issn1007-7731.2026.08.024
Analysis of a severe convective weather process in Luoyang City triggered by weak cold air intrusion at the edge of the subtropical high
Feng Jingyi
(Luoyang Branch of Civil Aviation Flight University of China, Luoyang , China)
Abstract To improve the forecasting and early warning capability of severe convective rainstorms in Luoyang, Henan Province, this study analyzed the atmospheric circulation background, diagnoses physical quantities, and investigated radar echo characteristics of a rainstorm event that occurred in this region on August 23, 2025, using MICAPS meteorological data, precipitation data from regional automatic stations, and radar and satellite monitoring data. Circulation background analysis indicated that this event was triggered by the interaction between weak cold air guided by an upper-level trough and southwest warm-wet airflows against the background of the western Pacific subtropical high retreating eastward. The surface cold front and low-level warm shear line were the direct causes of the short-duration heavy rainfall. Physical quantity diagnosis revealed that, sustained southerly water vapor transport provided favorable water vapor support for persistent precipitation; thermal uplift created the initial unstable state, dynamic uplift effectively released unstable energy, warm-moist air masses determined the intensity and efficiency of precipitation, and the invasion of the cold front determined the onset time, main rainfall areas and organizational structure of precipitation. Analysis of radar echo characteristics showed that a north-south oriented convective echo belt appeared over the western part of the study area, which gradually moved eastward as a whole and triggered precipitation in local regions. This study reveals the interaction mechanism of multi-scale systems, providing a scientific basis for refined rainstorm forecasting and disaster risk prevention in agricultural production.
Keywords severe convective weather; short-duration heavy rainfall; synoptic diagnosis; radar echo characteristics
洛阳市地处河南省西部,境内山川丘陵交错,地形复杂,西高东低的地势条件进一步加剧了暴雨风险。（剩余5964字）