Weather for the Diada long weekend: a fairly calm start, but showers will return.

BarcelonaWe're leaving behind a very irregular episode of showers and heavy thunderstorms. Rainfall varied widely between Monday and Tuesday, but in some places, local rainfall reached between 50 and 100 l/m², with a few downpours (you'll find all the data at the end of this report). A few showers will continue to fall until early evening in northern Catalonia and the Balearic Islands, but calm and sunny weather will gain ground on Wednesday, with only a few exceptions.

Tonight will be markedly cooler everywhere, even cold in the Pyrenees. Thursday, Catalonia's National Day and a public holiday, will be a placid day with few nuances, but showers will reappear in several regions starting Friday, right in the middle of a long weekend for many people. Maximum temperatures will rise, but the heat will be moderate and normal for the time of year, with nights that remain cool.

Wednesday: more sun and calm

The weather will be mostly calm this Wednesday, with plenty of sunshine and calm in most regions. However, there will be minor variations. During the early hours of the morning, there will be traces of cloudy skies in the northeast, with the occasional scattered shower or sprinkle possible, especially along the coast. Scattered showers will also arrive in the Pyrenees and northern Girona, particularly in the Alt Empordà region, in the afternoon. However, no rain is expected elsewhere, and the Tramuntana and Mistral winds will only blow until mid-morning or midday in the Empordà and Ebro regions.

As for temperatures, minimums will drop even further, and morning coolness will be prominent everywhere, including along the coast. It will even be cold in the Pyrenees, especially at the highest altitudes, although in the valleys it will also drop below 10°C. Many nighttime temperatures will range from 11°C to 16°C inland and on the pre-coastal areas, and below 20°C on the coast. Maximum temperatures will rise thanks to more sunshine, especially on the central and southern coast and pre-coastal areas, but the heat will be moderate. Most records will range between 23°C and 28°C.

Diada Bridge with a little bit of everything

The Diada will be marked by calm and generally quite sunny weather, with only the possibility of some afternoon showers in the eastern Pyrenees. A festive day is a pleasant one, with a normal warm atmosphere for the time of year in the middle of the day and cool mornings. However, the weather forecast indicates that instability will increase again on Friday due to the passage of a new front, which will bring showers back to several regions.

A still uncertain situation that we will have to specify, but it would occur right during the Diada long weekend, when many people are partying and going out. The weather will not clear completely over the weekend, and temperatures will fluctuate slightly, but they appear to remain near the mid-September normal.

Balance of showers and strong storms

The active cold front that arrived at the start of the week has caused a marked increase in instability. Between yesterday and today, the weather has been very unsettled, with little to no rain falling everywhere, albeit very irregularly. The most extensive rainfall occurred during the early hours of Tuesday morning, and there are areas where showers and thunderstorms have been intense and abundant.

The areas most affected by the intense rain so far have been the Pyrenees and Pre-Pyrenees (especially the eastern one), points in the northeast, central Catalonia, the Ebro River, and between Camp de Tarragona and the southern coast and pre-coast of Barcelona. In these areas, records range from 50 to 100 l/m². This water has helped to somewhat recover the reservoirs in the inland basins after the summer decline. They are currently at 73%. There were also some notable downpours in the Valencian Community and especially in the Balearic Islands, where strong gusts of wind caused damage and trees fell due to snapping. These are some of the most notable records from the entire episode in Catalonia:

• 115 l/m²: Aleixar
• 109 l/m²: Beget
• 95 l/m²: The Squirrel-Cantonigroso
• 84 l/m²: Almadraba de Bages
• 82 l/m²: the Camp Forest
• 81 l/m²: Orís
• 76 l/m²: Berga
• 69 l/m²: Mas de Barberans
• 62 l/m²: Mieres
• 61 l/m²: Port del Comte
• 61 l/m²: Sau reservoir
• 60 l/m²: Sant Martí Sarroca
• 59 l/m²: Torredembarra
• 59 l/m²: Prats de Lluçanès
• 59 l/m²: Hospitalet de l'Infant
• 58 l/m²: Casserres
• 56 l/m²: Pierola Hostalets
• 56 l/m²: Perafita
• 56 l/m²: El Vendrell
• 55 l/m²: Tamarit
• 54 l/m²: Montesquiu
• 53 l/m²: Artés
• 53 l/m²: Lladurs
• 52 l/m²: Fillers
• 52 l/m²: Villa-round
• 52 l/m²: Montserrat
• 52 l/m²: Miami Beach
• 50 l/m²: Queralt sanctuary
• 50 l/m²: San Pablo de Segúries
• 45 l/m²: Riudecanyes
• 41 l/m²: Oliana
• 41 l/m²: Constantine
• 41 l/m²: the Quar
• 38 l/m²: the Tallada of Empordà
• 36 l/m²: Rápita - Els Alfacs
• 36 l/m²: La Pobla de Segur
• 36 l/m²: Tempering
• 35 l/m²: Ulldecona
• 35 l/m²: Vinyols and els Arcs
• 34 l/m²: Darnius-Boadella Swamp
• 33 l/m²: Girona
• 32 l/m²: The Pont de Suert
• 31 l/m²: Molló
• 30 l/m²: Castellar de n'Hug
• 30 l/m²: Luck
• 30 l/m²: Old
• 29 l/m²: Organyà
• 28 l/m²: Banyoles
• 26 l/m²: Saint Peter the Fisherman
• 25 l/m²: Olot
• 23 l/m²: La Seu d'Urgell