2023年7月29日黑河地区强对流天气过程分析

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Abstract Utilizing conventional observational data and Doppler radar data,and applying synoptic diagnostic analysis methods,a diagnostic analysis was conducted on the severe convective weather process in the Heihe region on July 29,2023.Through investigation,it was found that under the background of a high-altitude low trough coupled with a low-altitude southwest jet stream,a low-lift condensation height and strong vertical wind shear were conducive to the occurrence and development of severe convective weather.The convergence effect of the cold front and low trough served as the triggering mechanism.The water vapor transport effect of the jet stream and the blocking effect of the temperature inversion layer provided the energy source for the severe convective weather.The process was characterized by rapid system development,heavy rainfall intensity,and strong local intensity,with multi-cell thunderstorm center echo intensities ranging from 60 to 65 dBZ.Vertical integrated liquid water content (VIL) center values ranging from 35 to 40 kg/m².The echo top height in the bounded weak echo zone WER ranges from 11 km to 12 km,with a strong echo top height of 50 dBZ reaching 10 km.In most cases,the ROSE2.0 one-hour accumulated precipitation (OHP) product and three-hour accumulated (THP) products display rain bands location that are slightly northward of the actual situation,with less rainfall.The user alert message (UAM) product provided a good forecast for this precipitation process,but there were still false alarms and missed alarms.

Key words： short-duration heavy precipitation thunderstorm gale multi-cell thunderstorm radar mosaic echo characteristics ROSE2.0 verification and evaluation

Received: 26 February 2025

ZTFLH:	P458.1+21.1
	P412.25

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	Articles by authors
	Qian Yiting
	Ma Kai
	Li Ziliang
	Sun Yue

Cite this article:

Qian Yiting,Ma Kai,Li Ziliang等. Analysis of the severe convective weather process in Heihe region on July 29,2023[J]. Meteorological Hydrological and Marine Instrument, 2025, 42(6): 25-28.

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http://www.qxswhy.com/EN/ OR http://www.qxswhy.com/EN/Y2025/V42/I6/25

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