The notice covers all districts of mainland Portugal and will last until 18:00.
The coast of mainland Portugal will also be under yellow warning due to sea swells, between 12:00 today and 12:00 on Tuesday.
Also, the north coast of the island of Madeira and the coast of the island of Porto Santo will remain on a yellow warning due to sea unrest, until 12:00 on Tuesday.
For today, precipitation is expected on the continent, sometimes heavy and accompanied by thunderstorms, which could be hail.
Strong winds are expected on the coast and in the highlands, accompanied by a sharp drop in maximum temperature.