The combination of two air depressions brings extremely heavy rains to these Arab countries.

Arab Weather - The latest satellite images and numerical weather model analyses at the Arab Weather Center show that the western and central Mediterranean region is being affected by a severe state of atmospheric instability resulting from the combination of two low-pressure systems: one is a hot desert low coming from North Africa, and the other is a cold, humid upper low coming from the European continent.

Details of the union of two air depressions and the areas affected by rain

In detail, a Saharan low pressure system is currently forming over the Algerian desert and gradually moving towards the Mediterranean Sea, coinciding with the advance of a cold upper trough from the north. This merger is resulting in a widespread atmospheric disturbance, leading to the formation of strong thunderstorms starting today, Saturday, October 18, 2025. The disturbance will extend tomorrow, Sunday, to include large areas of northern and eastern Algeria, as well as large areas of Tunisia, particularly central Tunisia.

Heavy to very heavy rainfall, accompanied by hail and strong thunderstorms, is expected, which will increase the risk of flash floods in several areas, especially in the northeastern highlands of Algeria, the central Tunisian plains, and coastal areas.

The effects of these weather disturbances are also expected to extend to northwestern Libya, with increased chances of flash floods in some coastal and mountainous areas, God willing.

As the weather system moves eastward over the Mediterranean Sea, high tropical humidity is expected to flow toward the center of the depression, leading to the formation of severe thunderstorms in the central Mediterranean. This will result in rainstorms affecting parts of southern Europe, particularly southern Italy, with the risk of flooding increasing in those areas.

And God knows best.