This weekend the weather will be very changeable, as we will continue under the indirect influence of a train of Atlantic storms. Today there will be intervals of clouds everywhere and some scattered and unimportant showers will arrive in the western regions, especially in the Pyrenees and the western Pre-Pyrenees, due to the effects of a Bruna storm that is already weakened and will end up disappearing completely. In any case, it is in the Ebro where some more intense downpour may occur. On Sunday morning the sun will dominate, but throughout the day the cloudiness will increase again from west to east due to the approach of a new worn-out Atlantic front. Temperatures will drop a little more and there will be a more autumnal atmosphere, both day and night.

The Atlantic storm Bruna will continue to send fronts towards our territory and will keep bringing plenty of rain to the west of the Peninsula. In Catalonia, very little water is expected, at least this Sunday, and beyond some drizzle or very weak showers during the afternoon, the day is expected to be quite calm. Nevertheless, a more active front could leave more widespread light rain or weak showers heading into Monday afternoon and during the early hours of Tuesday. Temperatures will clearly rise starting Sunday, as the counter-clockwise rotation of this storm – located off the western peninsular coast – will push warmer south-westerly winds towards us, a prelude to the traditional St. Martin's summer.

The sun and the absolute calm of these last few days will not have much continuity. Starting this weekend we will be under the indirect effects of the great Atlantic storm Bruna, which will bring a lot of rain to the west of the Peninsula. At home, however, very little water is expected, for the moment. We will have a Saturday and a Sunday with a more changeable sky due to the presence of quite a few intervals of clouds. But beyond some light rain or a very weak, local and passing shower, no rain is expected. Temperatures will rise clearly starting on Sunday, as the counter-clockwise rotation of this storm – located in front of the western peninsular coast – will push warmer winds from the southwest towards us. The models indicate that next week could begin with an increase in instability.

This first week of November will bring us significant changes. Today will still be a fairly quiet day, but from the afternoon onwards, the first local showers may appear on the coast and pre-coast, and the temperature will begin to drop. The core of the anticyclone will be located in northern Europe and will drive the entry of a very cold air mass from the east of the continent towards our area. It will be this Tuesday when we will notice the most significant drop in thermometers and the atmosphere will be cold in general, with an environment more typical of late autumn or early winter. This cold air influx will have a Mediterranean trajectory, bringing moisture and precipitation. Therefore, tomorrow will be a cloudier day with a risk of rain in many places, while in the Pyrenees it may snow down to 1,500 m or lower.

Today, All Saints' Day, the sun will prevail and mild weather will be the protagonist. The morning began with low clouds in parts of the coast, as well as in the Central Depression, valleys of the Pyrenees, Pre-Pyrenees, and Pre-coastal range, where we find some banks of fog.

The weather will be full autumn this weekend and with a bit of everything depending on the area. Today will be a day with intervals of clouds and a risk of some local showers, especially in the Ebre and the Costa Brava, while the rain will be a bit more prominent in the Valencian Country and the Balearic Islands. This early morning some downpours were recorded that, locally, have accumulated 31 l/m²² on the island of Buda, 4 l/m²² in Miami Platja, 3 l/m²² in les Cases d'Alcanar and 0.5 l/m²² in Falset.

We are at the gates of the announced major change in weather. We have experienced the last hours of calm and heat for this time of year, and this weekend the meteorological situation will take a radical turn. It will be from midday and this afternoon when showers and storms will gain ground from south to north in many regions. Sunday will be a gray, rainy, and suddenly colder day. The rain may be heavy and, in some cases, accompanied by torrential downpours that leave significant accumulations in a short time. For this reason, Meteocat has activated an alert for intense rain in many regions, which could leave more than 40 l/m² in just half an hour or more than 90 l/m² in three hours. The warning is red –danger 5 out of 6– in Vallès Oriental, la Selva, and el Maresme.

The red alert remains activated due to the episode of torrential rain in the coastal, pre-coastal and northeastern regions of the country. An extraordinary convective mesoscale system has generated torrential rains, especially in the pre-coastal and central coastal areas, with accumulated amounts until 10 a.m. this morning of 288 l/m² in Vilassar de Mar, 255 l/m² in Mataró (Can Canyelles) or 248 l/m²in Granollers. Ultimately, the medicane (Mediterranean mini-hurricane) did not form, but, as the models indicated, the accumulated rainfall amounts have been historic. Notable are the 68 l/m² that fell this morning in just half an hour in Granollers, a figure of extraordinary torrential intensity. In Pineda de Mar, several rescues were carried out in ground floor homes and vehicles submerged by water, and in the city of Barcelona (Can Bruixa), the record for accumulated precipitation in 24 hours (data since 1914) was broken, with a total of 202 l/m².

In the Mediterranean, a type of atmospheric disturbance can occur that, due to its characteristics, can be associated with a tropical cyclone, although with less intensity and smaller dimensions: the medicanes. The term medicane comes from the fusion of Mediterranean and hurricane. This phenomenon is nothing more than a quasi-tropical depression formed by its own warm core, induced by a large concentration of latent heat resulting from condensation. The energy released by this large storm translates into the formation of large stormy nuclei, with torrential rains, very strong surface winds, and violent phenomena, such as intense electrical activity, waterspouts, tornadoes, and maritime storms. If we observe it through satellite images, it is often accompanied by a kind of eye that resembles, in a certain way, the structure of a hurricane.

Meteocat has activated a red alert –the highest possible– in view of the new episode of torrential rain expected in the coming hours in many counties of the coast, the pre-coastal areas, and the northeast of the country. Precipitation has already started to fall during the morning in the Ebro region, and throughout the day –especially in the afternoon– it will spread to many points of the coast, the pre-coastal areas, and the northern half of the country, with some downpours. It will be towards the night, the early hours, and Sunday morning when the peak of the storm is expected. With current maps, the rains could be intense and extraordinary in the northeast, the coast, and the pre-coastal area of Barcelona, with local accumulations that may exceed 200 or 300 l/m² in a few hours, strong winds, and extreme phenomena. Meteocat's alerts are for intense rain and accumulations of more than 40 l/m² in half an hour, 90 l/m² in three hours, and more than 200 l/m² in 24 hours.

With two days left until the official arrival of astronomical autumn, we still have to talk about temperatures more typical of summer than of these dates. Minimum temperatures have recorded the typical drop in recent days due to the shortening of daily daylight hours, with a significantly cooler environment at night and in the early morning, especially inland and in the Pyrenees. Maximum temperatures, on the other hand, continue to rise. Yesterday they climbed back above 33 ºC in the interior of the Ebro and in the Priorat. And this Monday there will be a heat peak, with many maximums of 30 to 35 ºC throughout the country. Although the mercury will fall back a little on Tuesday, temperatures will remain above average throughout the week, along with anticyclonic calm.

During this weekend and the coming days the weather will be identical, with some exceptions. Temperatures have normalized and only towards Monday will they be able to rise a little in the West. Apart from sun, some morning fog and some thin clouds, the arrival of weak north and northwest winds will stand out, but little else.

Yesterday, remnants of instability were still seen in some sectors of the territory. In the morning, some downpours falling over the sea brushed the coast of Barcelona and left some local showers and, even, some isolated flooding in the seaside neighborhoods of the Catalan capital itself, where in a few minutes more than 10 or 15 l/m² accumulated. They were very local and anecdotal phenomena that ended up clearing away completely.

The nightmare of this atypical and historic heat is numbered. This Monday we will no longer reach 40 °C in the Ponent area, although it will still be very hot. The drop in the thermometer will be slight, around 3 or 4 degrees in some places, enough so that no more records are set. However, it will still be hot, with highs around 38 or 39 °C in Ponent and in the interior of the Ebro. From this Sunday it is worth highlighting new exceptional values, not at all common in the month of September, such as 42.5 °C in Vinebre and 42.3 °C in Torroja del Priorat.

The runaway heat that continues to set temperature records across the country is numbered. This Saturday, the highest maximum for a September since 1914 was once again recorded at the Fabra Observatory, reaching 35.3 °C. With this historic value, there are now four records broken in the city of Barcelona since the beginning of the month. In Ponent, in the interior of the Ebro, and in regions like Priorat, temperatures have reached or neared 40 °C again, with a new September record at 64 of the 128 #XEMA stations with more than twenty years of data.

The unbridled heat continues to set temperature records across the country. This Saturday, the highest maximum for a September since 1914 was recorded again at the Fabra Observatory, with 35.3 °C. With this historic value, there are already four records broken in the city of Barcelona since the beginning of the month. In Ponent, in the interior of the Ebro, and in regions like the Priorat, temperatures reached or brushed against 41 °C, with a new September record at 64 of the 128 XEMA stations with more than twenty years of data.

The unbridled heat continues to set temperature records. Yesterday, Friday, 34.1 °C was recorded at the Fabra Observatory, the highest maximum since 1914 in a September in the city of Barcelona. In Ponent and the interior of the Ebro, temperatures soared again, reaching a sweltering 42.5 °C in Vinebre (Ribera d'Ebre) and up to 39.3 °C in the city of Lleida, the highest maximum in September since 1939. Therefore, it was the hottest September day recorded in Catalonia, with historic values for these dates in 77 of the 128 XEMA stations with more than 20 years of data.

The temperature climbed sharply again, with new records, this Thursday. At the Fabra observatory, it reached 33.1 °C, half a degree less than Wednesday, when 33.6 °C was recorded. Yesterday's value is the second highest since 1914 in a September in the city of Barcelona. In Ponent and the interior of the Ebro, they brushed against 40 °C (39 °C in Vinebre, one of the highest since 2022). If we take the set of Meteocat's automatic stations, 27 out of 128 broke the record for a month of September in 20 years of data, especially those located in Empordà, the Pyrenees, and Ponent.

The temperature rose clearly yesterday Wednesday, when it exceeded 35 °C in many inland points and new heat records were registered in a month of September, as in the case of the Fabra Observatory, where the 33.6 °C measured is the highest value since 1914. All of this is the prelude to an exceptional heatwave that will cause the temperature to be well above the climatic average, with forecasts of registering new temperature records in the coming days.

The Atlantic disturbance located off the coasts of Portugal and Galicia will send a front that will generate unstable weather in our territory this Monday. While the first part of the morning has been stable, from midday the panorama has changed radically and storms have gained ground, affecting a large part of the west and north half by mid-afternoon. Showers of moderate to strong intensity are expected and the possibility of hail or hailstorms in many places, especially in the northern half and the northwest quadrant (you will find a provisional summary of the storms at the end of this article).