Zhoushan, located along the southeastern coast of China, frequently experiences severe convective winds (SCWs). Employing the advanced time‐of‐arrival and direction system (ADTD) and surface observation data and the T‐mode principal component analysis (PCA‐T) method, this paper investigates the multiscale spatiotemporal characteristics of SCWs in the Zhoushan region. The results reveal pronounced spatial and temporal heterogeneity of SCWs, with significantly higher SCW frequencies observed at island stations in northern and southeastern Zhoushan. Both the SCW monthly and diurnal variations exhibit distinct bimodal patterns: SCWs occur most in August, with a secondary peak in May, and two diurnal peaks appear at 1800 and 2300 BJT. Further analysis indicates that SCW events are closely linked to synoptic circulation and the associated thermodynamic and dynamic conditions. Four major circulation types of SCWs are identified: (1) upper‐level jet type (ULJ, 32.5%) mainly occurs in spring (March–May), with northwesterly and southerly winds prevailing at the surface, the largest 0–6 km vertical wind shear, the largest LI, but the lowest convective available potential energy (CAPE). (2) Subtropical high margin (SHM) type (30%) primarily emerges in July, dominated by southwesterly winds. (3) Northern low‐level vortex (NLV) type (27.5%) occurs most frequently in August, featuring northwesterly winds and the greatest CAPE. (4) Weak forcing (WF) type (10%) appears from July to August, characterized by northeasterly winds, minimal 0–6 km vertical wind shear, and the lowest CCL with low‐level moisture. These findings could enhance understanding of SCW characteristics and provide a scientific basis for SCWs’ forecasting and early warning in coastal islands such as Zhoushan.
Fan et al. (Thu,) studied this question.