中到大雨

降水过程以中到大雨开始，且持续较长时间；

The rainfall process begins with a moderate or a heavy rain , and continues for a long time ;

中国气象局预报周二监利县将会有中到大雨。

Moderate to strong rainfall was forecast for the county on Tuesday night , the China Meteorological Administration said in a statement .

试验表明，神经网络方法能提高中到大雨降水量级的中期预报能力，但对暴雨的预报不理想。

Studies suggest that ANN is an effectual way to improve rainfall forecast , but it was unfavorable for heavy rain forecast .

对流层中低层辐合、高层辐散和高湿度区的维持，以及强散度柱、强涡度柱耦合和高低空急流的稳定维持是产生这次区域性中到大雨天气过程的主要原因。

The convergence in the middle troposphere , the maintenance of divergence in the upper troposphere and high humidity , the coupling of strong vorticity and stability columns and the maintenance of the upper / lower jet flow are the main causes of the moderate to heavy synoptic weather process .