On Sunday cool air flows from the North Atlantic towards Catalonia and the Balearic Islands. The cold air masses meet the warm air masses and the risk of severe weather increases accordingly.
In the current forecast (GFS model) there should be thunderstorms, heavy rain, flash floods, heavy gusts and floods. The storms could be particularly severe between Tarragona, Barcelona and Girona. On Sunday afternoon it will also hit the island of Mallorca.
The current hourly forecast (GFS & ICON) for your location for the next 10 days is available, updated 4 times a day, here with our animated weather maps at
meteo365.es
The current airport weather for Barcelona is available
here