According to the theory of the nonlinear dynamical systems with forcing and dissipation,theconceptual ideas are proposed that the intense convective system is an attractor of the meso-scale dynamicalsystem,in which the large-scale fields serve as the bifurcation parameters that evolve slowly.The intenseconvective systems occur explosively when the intensity of the large-scale system passes a bifurcation point.Thus,its prediction is just to predict the evolution of the attractor,independent of the mesoscale initial con-ditions.A primitive spectral limited-area model has been developed and two realistic cases,which were cap-tured by the Eastern China area mesoscale experiment,have been simulated by using this model.The resultshave proved the theoretical points.
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