The districts of Bragança, Viseu, Porto, Guarda, Vila Real, Viana do Castelo, Leiria, Castelo Branco, Aveiro, Coimbra, and Braga will be under warning until 9 pm on 11 May, according to the Portuguese Institute of the Sea and the Atmosphere (IPMA).

The yellow warning, the least severe on a scale of three, is issued when there is a risk to certain weather-dependent activities.

The IPMA (Portuguese Institute of the Sea and the Atmosphere) forecasts for today on the mainland periods of very cloudy skies and showers, which may be accompanied by thunderstorms and occasionally in the form of hail, being more intense and frequent on the coast north of Cabo Mondego until late morning and in the interior North and Central regions during the afternoon.

The forecast also indicates light to moderate south/southwest winds, sometimes blowing strongly on the western coastal strip until mid-morning and in the highlands until late afternoon, and a slight rise in minimum temperatures, especially in the North and Central regions.

Minimum temperatures will range between 7 degrees Celsius (in Guarda) and 14 degrees Celsius (in Faro), and maximum temperatures between 13 degrees Celsius (in Guarda) and 22 degrees Celsius (in Santarém).