Locally intense downpours still until the night in some places

BarcelonaThe episode of storms and downpours has affected this Tuesday, above all, a large part of the coast and the pre-coastal area, but especially the Barcelona area. In many cases, the intensity has been torrential, which has caused sudden rises in rivers and streams and numerous floods. Where it has rained the most has been in the Alt Penedès, the Garraf, the Anoia, the Baix Llobregat, the Vallès Occidental and the Barcelonès, with many records of 50 to 100 l/m² or locally more, fallen in only three hours (you will find the most important data at the end of this information).

Until late at night, irregular but locally heavy showers and thunderstorms will still occur, especially in the northeastern regions, the Pyrenees, and the Pre-Pyrenees. On the other hand, on Wednesday the rain will ease off, and there will only be some local afternoon showers and variable skies. What we will notice is a clear rise in temperatures after Tuesday's drop, with a temporary spike in heat to say goodbye to the month of September. But starting Thursday, instability will increase again and temperatures will drop once more.

Wednesday: more calm and heat

The weather will be much calmer this Wednesday, the last day of the month, as in general no rain is expected. However, the sky will be variable due to the presence of quite a few intervals of clouds, and it will even be overcast in the western regions during the morning. On the other hand, towards the northeast there will be many more clearings. In the afternoon some local and unimportant showers will escape in parts of the Pyrenees, the Pre-Pyrenees, the pre-coastal area and the Ports. Not much, and in the vast majority of the territory it will not rain.

All this with temperatures that will be similar at first, with a generally cool to mild environment and new slightly tropical minimums in coastal areas. As for the maximums, they will clearly rise after Tuesday's drop, with an increase that will be especially marked in inland and northeastern points. Many values from 26 ºC to 31 ºC are expected. A short summer that will be transitory.

More showers in the coming days

The weather situation will become complicated again in the coming days, as instability will remain pronounced. On Thursday and Friday, irregular downpours will be repeated, especially in parts of the Pyrenees, the interior and the south, as well as in the Valencian Country. Locally they will be intense and may be accompanied by storms.

Some weather models indicate that a more extensive wave of rain could arrive over the weekend, but this point is still very uncertain. Temperatures will drop again and, little by little, will normalize for the time of year, especially starting from the weekend. It seems that, now yes, autumn will finally impose itself completely over summer.

Flash flood assessment

The torrential downpours have mainly affected the coast and pre-coast of Barcelona, with many records of 50 to 100 l/m², and locally more. Water that fell torrentially in three hours or less, which has caused flooding and many problems. In the rest of Catalonia it has rained less, although also with locally heavy showers and storms, especially in other areas of the coast and pre-coast. These are the most notable data from the episode:

• 122 l/m²: Sant Pere de Riudebitlles
• 121 l/m²: Torrelavit
• 105 l/m²: Sant Pau d'Ordal
• 97 l/m²: Canaletes
• 92 l/m²: Cerdanyola del Vallès
• 88 l/m²: els Hostalets de Pierola
• 76 l/m²: la Granada
• 76 l/m²: Molins de Rei
• 76 l/m²: Sant Sadurní d'Anoia
• 76 l/m²: Barcelona (Fabra Observatory)
• 71 l/m²: Sant Cugat del Vallès
• 71 l/m²: Fornells de la Selva