An upper low pressure system is expected to move over the western Mediterranean today and tomorrow, bringing with it showers and thunderstorms with partly extreme amounts of rain. The upper low will advect cold air from much further north to the Mediterranean, where the temperature difference between the surface of the ocean and the cold air up in the atmosphere will fuel the formation of showers and thunderstorms.
The first showers and thunderstorms have started forming around the balearic islands. The center of the low pressure system is expected to gradually move towards the east, being located between Sardinia and Tunisia in the coming night, and so the rain will also move east. The rain is rotating counter-clockwise around the center of the low, and is expected to push against the north African coast from the north, and the mountains of Corsica from the east, resulting in the highest amounts of precipitation being expected there. Within two days, well over 100 liters of rain per square meter may fall in these regions, as seen on the map below:
