Abstract:The temporal and spatial distribution of the real time synoptic systems, the phy sics factors and the radar echo characteristics all indicated that a heavy rain process will occur in Wuhan single station and eastern Hubei province in 24 hou rs, but it is proved a false prediction. In order to find the reasons, some phys ics factors are diagnosed by using T213 numerical prediction products. Based on the physical variables, an analysis whether the heavy rain will occur in Wuhan s ingle station, and even in eastern Hubei Province is made. The results show tha t many physical factors did not consist with the forecast that a heavy rain proc ess will occur in the eastern Hubei province and Wuhan single station. For exam ple, without the energy front zone, the moisture front zone and the moisture con vergence, the rainfall synoptic system won't develop and intense. Thus the regional heavy rain won't occur. The vorticity advection of Wuhan sing le station appears positive value at low level and negative value at high lev el. Such configurations have no dynamic effects. Vertical speed indicates that t here are downdraft at the whole upper layer of the single satation. All these p ositions cannot offer the important conditions for dynamic instability. Ra shows that moisture flux divergences are strong at upper troposphere of Wuhan single station and rf is in a low value. K index does not reach at 35℃ but dec rease day by day. Those physics values cannot trigger secondary circulation of s ingle station. So no heavy rains occur in Wuhan.