Thailand Rain Gauge data are obtained from the Thai Meteorological Department (TMD). Ten years (1993-2002) of daily rain rates are collected from more than a hundred rain gauge stations over Thailand. Figure 1 shows the location of the gauge stations. The dataset is separated into five regions: north, central, north-east, east and south. Figure 2 shows the boundary of five regions over Thailand. The data are firstly binned into 1°x1° boxes. The box average rain rate is computed by weighting the gauge values at each gauge by its inverse square distance from the grid center. There are approximately 50 boxes with at least 1-2 gauges within each 1°x1° box.