*4.3. Evaluation at the Hourly Scale*

Figure A6 compares the scatterplots between observed and estimated hourly rainfall among the SPPs. Hourly rainfall estimates by all five SPPs are much scattered around the 1:1 line. Since hourly rainfall is only recorded from April to October, we evaluate the performance of the SPPs at the hourly scale for these seven months. Correspondingly, seasonal evaluation metrics are only calculated for spring (April to May), summer (June to August), and fall (September to October).
