trough

A very deep polar trough is descending towards North Africa and Spain is right in the middle

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Now Spain is busy with the rain and it is logical: it is not every day that a high-impact storm hits you and turns the country upside down. However, as they said from Navarmeteothe key question is what is going to happen from Tuesday. Let’s fasten our seatbelts, because curves are coming. An early winter. Both the European and American models coincide in a change in weather pattern next week. Towards Thursday, a very deep polar trough will descend from northern Europe towards the south. The interesting (and worrying) thing is that it is going to pass right over us. That is, in a week Spain will be immersed in a polar air mass maritime. But the thing is not limited to that: as a corridor opens that connects us to the north (between the western anticyclone and the storm in the Gulf of Genoa), shortly after the first ‘impact’ a second pulse of even colder continental polar air will arrive. What does this mean? Well, if everything happens as the models say, cold and humid air from the North Atlantic will enter first. That will cause temperatures to drop and rain and snow will return. Then, with the strengthening of the northerly flow, drier and colder air will arrive: a major thermal collapse. Are we sure about this? We have been seeing for days how the great models they were converging around a scenario like this: a huge tongue of cold approaching the peninsula. However, skepticism was more than justified. But things are starting to get real. It seems clear that it will be a cold week throughout the country (except the Canary Islands) and temperatures at altitude are beginning to reach up to 10 degrees below average. Everything will start in the Cantabrian Sea, but by Friday it will have reached the entire peninsula. Things are going to change. We come from the storm Claudia and, although the impact has been considerable, It has been a fairly tempered system. However, things are going to change: even if in the end the trough does not reach that far south, the cold is going to be felt in large areas of the country. And this is the beginning of a winter that, if all goes well, is expected very (but very) moved. Image | Tropical Tridbits In Xataka | It’s going to rain in Galicia. It seems normal but it is something more: the prelude to a total change in the weather in Spain

An Atlantic trough looks out to the Mediterranean coast

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Autumn has arrived and does it hard. So much so that the Mediterranean coast begins to prepare for an intense episode of rainfall. The culprit (at least in part) is a Atlantic trough that travels the peninsula. Extreme risk.This situation has led to the State Meteorology Agency (AEMET) to Issue several noticesincluding numerous orange warnings due to important risk and two red notices due to extreme risk. The latter affect a good part of the province of Tarragona, specifically in the southern prelitral and in the southern coast of the Catalan province. Accumulated rainfall is expected to reach 90 mm in an hour. The red notices will take effect at 15:00 and end at 9:00 p.m., but it must be taken into account that orange notices will last in this area throughout today, as well as during part of tomorrow. Beyond Tarragona. Aemet yellow and orange notices extend by almost the entire Levante, also covering interior areas, such as the areas of Gúdar and the teacher; Hellín and Almansa; or the safe basin, among others. Yellow and orange notices not only alert the risk derived from rains but also storm risk. As of tomorrow, orange notices will also reach the Balearic Islands. What is happening? The agency itself Explain in an informative note that the origin of this event is in an Atlantic trough that Since yesterday we travel our territory. This trough, they explain will originate “a growing instability in the Mediterranean area” during the first days of this week. However, extreme rains will be the result of the interaction between this trough and “the formation of a bosom of low pressures between the southeast Peninsular and Balearic Islands.” This new formation, continues to explain Aemet, will cause a “wet flow of the east” that will spread through the Mediterranean area. “The presence of high humidity at low levels together with thermal and dynamic instability, will propitiate the formation of showers and intense storms, in areas of the Eastern Peninsular and Balearic Islands,” concludes the agency in its informative note. Uncertainty. There is a remarkable uncertainty about the future of this extreme phenomenon, although the models indicate that the situation will come between today and tomorrow, improving from Wednesday. It should be remembered that the notices derived from the situation will still affect the Balearic Islands, so it is convenient to be aware of the evolution of the trough. In Xataka | Google has demonstrated with its AI that the prediction of storms and hurricanes is outdated. This is how your new model works Image | ECMWF / Aemet

A trough "anomally intense" and a Mediterranean to red live: the explosive cocktail that arrives in Catalonia and Valencia

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This week time offers us a breathing of the scorching heat we have had to face during the first half of the summer, but this truce brings, again, an important risk of storms. In the center of this new stormy episode is, once again, the Mediterranean coast. Storms come back. The arrival of a new trough has put on alert To many meteorologists. The reason is in the possibility that its arrival unravels important storms in the Mediterranean basin, storms that could bring with them the arrival of hail and risk of flooding in some areas where it is expected to fall 30 mm in a matter of one hour. The polar jet and a very hot Mediterranean. The main cause of the storms would be the arrival of the trough driven by a polar jet especially wavy during these days. These undulations would bring with them a mass of cold air in height, which when reaching the Mediterranean basin will interact with the warm air of the region, facilitating the appearance of convective clouds, according to Experts explain. The worrying thing about the situation lies in the combination of two circumstances. On the one hand, we find a trough that was recently described as “anomalously intense for the time”, In words of the physicist, disseminator and researcher at Aemet JJ German. On the other, a Western Mediterranean Sea at a much higher temperature than is usually common. In Xataka “Clouds of fire”, the phenomenon that makes escape from sixth generation fires can make it impossible As of Wednesday. The resulting storms are expected to be especially intense in Wednesday’s days and during the early hours of Thursday. The forecasts talk about rainfall between 30 and 40 mm In an hour, but the possibility of even more intense rains is not ruled out, which implies the possibility of floods in areas such as ravines and ramblas. Important risk. The State Meteorology Agency (AEMET) has issued A series of notices related to these episodes that will be added to the notices that have been common, associated with the maximum summer temperatures. For now, orange notices for important risk are concentrated on the day of Wednesday 23, although we will have to wait for Know the evolution of the situation during Thursday. On Wednesday, almost all of Catalonia will be under notice for rains and storms. It will also be the Aragonese and Navarro Pyrenees, and other areas of Aragon and the province of Castellón. Orange notices, due to important risk, will also affect part of the provinces of Girona, Barcelona, Tarragona and Castellón. To this we will have to add the risk of Rissagas on the island of Menorca. {“Videid”: “X89B35L”, “Autoplay”: False, “Title”: “Professional Cazatorentas_ This is your day to day”, “Tag”: “”, “Duration”: “400”} Change in the trend? The situation seems to be improving on Friday, but even during the day They might be expected instability in some areas. The models indicate that after the storm, during the weekend, stability will arrive and with it could return the high temperatures. However, we will still have to wait to know in detail the evolution of the atmospheric situation. In Xataka | The hydrological bonanza could not be eternal: drought is a real threat after an extremely warm, and also dry June Image | ECMWF (Function () {Window._js_modules = Window._js_modules || {}; var headelement = document.getelegsbytagname (‘head’) (0); if (_js_modules.instagram) {var instagramscript = Document.Createlement (‘script’); }}) (); – The news A “anomalously intense” trough and a Mediterranean to red alive: the explosive cocktail that arrives in Catalonia and Valencia It was originally posted in Xataka by Pablo Martínez-Juarez .

A trough ready to free us from the scorching heat, but charging its price on storms

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The worst of this warm episode has not yet arrived but there are those who already have their view at its end. It is not for less, as it is customary this summer, the only thing that is helping to reduce the thermometers is the arrival of storms. And again meteorologists foresee them. Change the trend. On Friday part of the peninsula will see A new transition Meteorological: The heat episode we now live will give way to storms. These stormy episodes will affect the north third and could be strong, leaving winds of intensity and hail. Dorsal and trough. Again, the alternation between scorching heat and intense storms is given by the succession of dorsal and trough, air masses in height under the influence of high and low pressures respectively. According to explains the geographer Samuel Biener in Meteoredthe change in the situation will come from the hand of an Atlantic trough driven in turn by the undulations of the stream in jet. Two seas to red live. There is another important element in the risk that these storms suppose in summer, Remember too Biener himself. It is in the seas, and more specifically in the temperature of its surface waters. Both the Western Mediterranean and the Eastern Cantabrian They are suffering their own “heat waves”. The waters of the surface in these regions have been accumulating several degrees above what would correspond to this time of year. This increases the risk of convective storms. Heat and moisture are transmitted to the air on the surface and then this air interacts with possible cold and dry air masses such as those dragged by the rush that approaches, generating important storms that discharge the humidity and energy accumulated in the environment. Uncertainty, for now. There is still uncertainty about the evolution of this new episode of storms but The forecasts From the State Meteorology Agency (Aemet), on Friday both cloudy skies are expected and “locally with a storm” rainfall. These will circulate from the west and will end up affecting most of the north third, being especially intense in the Eastern Cantabrian and Western Pyrenees. The situation is expected to refer towards the afternoon of Saturday, although the forecasts indicate the possibility that during the day there will be “strong and accompanied by storm” rainfall between the Eastern Cantabrian and the Northeast of Catalonia. For now the agency has not issued any warning related to these storms, but it is still early to rule out a worsening of the situation. In Xataka | The heat of the last weeks has been so extreme that we have already exceeded tropical nights: the equatorial nights are here Image | ECMWF

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