Abstract
We developed the advanced nowcast method focusing on the difference of precipitation propagation between the horizontal scales. We separate the precipitation distribution observed by X-band MP radars into small-scale and large-scale component using the wavelet transform. Prediction of each component is made by applying the conventional nowcast method. We get prediction of precipitation distribution by adding the predicted small and large components. Developed method is better at prediction of the propagation of small-scale component than traditional method. As a result, the prediction error decreased.
