Special Event Phase 1: Weather Alert
On May 5, 2021, a new special event called Weather Alert will start. In this event, sudden abnormal weather conditions are about to bring an unprecedented catastrophe to Pasio. This event is divided into two phases. The first half of the event will start on May 5, 2021, with the second half scheduled to start in mid-May. We’re looking forward to players investigating this mysterious weather phenomenon.
Source: Official Pokémon Masters EX site