Fig. 2: Daily precipitation and mean sea level pressure from 25 April to 6 May 2024.

The red box shows the region shown in Fig. 1, panel 1. High pressure in the South Atlantic facilitates the transport of moisture into central Brazil, then southeast via the South American low-level jet to Rio Grande do Sul. Data from ERA5: while this precipitation data is not used in the study, the dataset is used here to understand the large-scale event dynamics.