According to the Portuguese Institute of the Sea and the Atmosphere (IPMA), the districts of Évora, Setúbal, Beja and Portalegre will be under yellow warning due to the forecast of rain, sometimes heavy and accompanied by thunderstorms between 11am and 6pm on 31 March.

The districts of Castelo Branco and Guarda are under yellow warning until 00:00 on Wednesday because of the scattered snowfall above 800/1000 metres of altitude, gradually increasing the quota to 1200 to 1400 metres throughout the day and increasing in intensity starting in the afternoon.

The yellow warning is issued by the IPMA whenever there is a risk situation for certain activities depending on the weather situation.

The IPMA forecast in the northern and central regions of the continent very cloudy skies, with medium and high clouds until early in the morning.

Periods of light and scattered rain are also foreseen, more frequent from the end of the afternoon, which will occur in the form of snow above 600/800 metres of altitude, increasing the quota to 1200/1400 metres throughout the day.

The forecast also points to a moderate east-northeast wind, being strong in the highlands, sometimes with gusts up to 80 kilometres per hour until mid-morning, decreasing in intensity from mid-afternoon.

The IPMA also provides for the formation of ice and frost in the interior and a drop in the minimum temperature.

In the south, very cloudy skies are expected, with good openings from the end of the afternoon and periods of rain or showers, which can sometimes be strong and accompanied by thunderstorms from the end of the morning, and which can be in the form of snow in the Serra de S. Mamede until early morning.

A weak to moderate wind is also expected from the south quadrant, being from the east quadrant in Alto Alentejo until early morning, becoming moderate from the afternoon, and sometimes strong on the south coast of the Algarve and in the highlands, gradually rotating towards the west quadrant and temperature drop.

The minimum temperatures will vary between -1 degrees Celsius (in Guarda) and 11 (in Faro) and the maximum between 8 (in Guarda) and 18 (in Faro).