Radar parameters of intra-mass thunderstorm clouds over Western Siberia
V.P. Gorbatenko1, L.I. Kizhner1, L.G. Ananova1, D.P. Mordus2
1National Research Tomsk State University, Tomsk, Russia
2"Aviamettelekoma Roshydromet", West Siberian Branch, Novosibirsk, Russia
Keywords: Western Siberia, intra-mass thunderstorm, frontal thunderstorm, mesoscale convective system, DMRL-S, radar parameter, synoptic conditions, nowcasting
Abstract
An increase in the accuracy of forecasting thunderstorms and hail in the intra-mass convective clouds in Western Siberia is an urgent problem. A modern Doppler meteorological radars DMRL-S is apparently a promising instrument for solving this problem. This study analyzes the radar parameters of intramass cumulonimbus cloud cover based on DMRL-S Novosibirsk data, observations from 18 meteorological stations within a radius of 200 km of the DMRL-S, and synoptic maps for June - August 2021-2023. The radar cloud characteristics of intramass and frontal thunderstorms are compared. Intra-mass thunderstorms are shown to be more often form under anticyclonic conditions, but are characterized by lower radar parameters. Higher reflectivity and water content are observed during thunderstorm development under cyclonic conditions and in diffuse baric fields. Intramass thunderstorm clouds generally exhibit weaker variability of their parameters compared to frontal clouds. The results can be used to refine diagnostic criteria and improve very short-range forecasts of thunderstorms and hail.
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