*2.1. In Situ Data*

In this study, we use precipitation data from 782 stations provided by BMNT, followed by proper quality-control checks within Austria, in the range of daily time-scale between 1985 and 2016.

However, there are other stations provided by ZAMG-Austria distributed throughout the country. In this study the in situ observation network provided by BMNT (hereafter: eHYD) is used for two reasons: first, the eHYD network is much denser than the ZAMG stations. Second, eHYD provides gauge observations that are entirely independent of the gridded precipitation products that are assessed in this study, while a large number of ZAMG observations are used by the Global Precipitation Climatology Centre (GPCC) products, which, in turn, are integrated in several of the products assessed in this study (i.e., IMERG). As an example, Sharifi et al. [3] reported that over the northeast of the country 51 out of 62 ZAMG synoptic stations are shared with GPCC, which contains a major part of the total ZAMG gauges (82%). Since the satellite products used in this study are used with GPCC gauge data for calibration, we utilize the independent eHYD observations in order to avoid any misleading results. Spatial distribution of both eHYD and ZAMG stations and elevation map of Austria are shown in Figure 1.

It is worthy to mention that stratiform, convective, and orographic precipitation types occur over the country [16].
