October begins with new alerts for strong storms

BarcelonaThis Wednesday the torrential downpours did not repeat themselves, but some scattered and weak showers still appeared that were not initially expected, especially on the coast and the pre-coastal area. A changing day that was also accompanied by a rise in temperatures. But October will begin with an increase in instability, as from this Thursday, showers and thunderstorms will gain ground irregularly in several regions. All of this is the result of the combination of cold air at high altitudes with the entry of humid maritime winds, driven by an anticyclone located further north. Thermometers will drop over the next few days and will gradually return to normal.

Thursday: storms in some places

Instability will increase this Thursday, the first day of the month of October. A day of variable and changing skies, with some early showers in the morning in the Pyrenees and between the Costa Daurada and Barcelona. It will be in the afternoon when downpours and storms will regain ground. They will fall irregularly and will mainly affect points in the Pyrenees, the Pre-Pyrenees, Central Catalonia, the pre-coastal area, the Terres de l'Ebre and the Camp de Tarragona.

In the afternoon the rain will reactivate in the Ebro area, where it may be intense, and thunderstorms may also reach Ponent. Meteocat has activated an alert in many regions of these areas due to intense rain that locally can leave more than 40 l/m² in half an hour or more than 60 or 90 l/m² in three hours, especially in Central Catalonia, the Pre-Pyrenees and the Terres de l'Ebre.

On the other hand, the maps indicate that the rain will be lighter on the central and northern coast, while in the afternoon the meteorological situation will also become complicated in the Valencian Community, where an orange alert is already activated due to the risk of torrential downpours. Some local showers will also escape in the Balearic Islands. All this with the arrival of the tramontana wind in the Empordà and the strengthening of maritime winds on the rest of the coast, with temperatures that will drop.

Unsettled and autumnal weather

On Friday, the main force of the rain will be concentrated in the Valencian Community and the south of the Terres de l'Ebre, where downpours may occur and significant water accumulations may be recorded. In the rest of Catalonia and the Balearic Islands, little rain is expected, with variable skies. In contrast, for Saturday, there is still a lot of uncertainty as to whether the precipitation will move to Catalonia. An aspect that we will have to go on confirming. Thermometers will drop, with increasingly cool autumn weather.