The Portuguese Institute of the Sea and Atmosphere (IPMA) said that the yellow warning will be in force until 3pm in Porto, Viana do Castelo, Aveiro and Braga, and until 6pm in Leiria and Coimbra.
The IPMA also issued a yellow warning for the districts of Porto, Viana do Castelo and Braga due to the forecast of strong winds, with gusts of up to 80 kilometres per hour, between 09:00 and 12:00 today.