Statistical characteristics of extreme precipitation induced by MCS in Hubei Province

Abstract

Based on the new generation of weather radar data from April to September during 2008-2018, 70 mesoscale convective systems (MCS) induced extreme precipitation in Hubei Province were selected to study their the spatial and temporal distribution characteristics of linear MCS mature stages. The results are as follows. (1) In five linear MCSs, the proportion of AS (adjacency stratiform cloud precipitation) is the highest, while leading stratiform (LS) and parallel stratiform (PS) (parallel stratiform) takes the least proportion. (2) MCSs are mainly concentrated in six regions, mostly in the south of Wuling, the south of Dabie Mountain, the north of Mufu mountain and Jianghan Plain. They move from the generating place to the east or the south by the east, Part of them are quasi static and backward to the established BB (back building). BB MCS basically remained in place from occurrence to dissipation. (3) From the perspective of monthly change, MCSs occurred the most in June and July, and MCS cases with extreme heavy rainfall in April and September occurred the least. (4) The average life history of an MCS was 5-8 hours, most of which occurred from afternoon to evening, and the peak of maturity was at around midnight. Most of the extreme precipitation occurs at night. Songzi, Tianmen and Hong'an are the places where the extreme precipitation occurs.

Keywords

• extreme heavy rainfall
• mcs
• spatial and temporal distribution
• shift path
• statistical characteristics