anticyclone

“An anticyclone arrives in Spain” is usually good news. On this occasion it is an advance of the coming hell: the 40ºC

by

The Dana that during the last days has downloaded important rainfall in the north and east of the Peninsula has gone down in history. After the brief thermal relief that this depression brought, meteorologists have their eyes on the situation of the atmosphere for the new week. The 40º appear again. And what indicates the situation of the atmosphere is a new turn towards extreme temperatures: again It is expected that the thermometers exceed in some areas the imaginary barrier of the 40º Celsius. With extreme heat, in addition, the “equatorial nights” could return. Shield against the storms. After the passage of a Dana through the north and east of the Peninsula, the anticyclonic time will become strong over our territory for most of this week. An anticyclone will keep a stormy train at the next few days, diverting them towards higher latitudes. The anticyclonic time will allow heat to accumulate again thanks to a high insolation and new warm air incursions from Africa. Again, heat. The forecasts From the State Meteorology Agency (Aemet) they point out that tomorrow, Tuesday 15, temperatures will exceed 35º in the south with areas of the Guadalquivir Valley being able to exceed 40º. On Wednesday 16 the situation will be aggravated, with the thermometers exceeding 38º in much of the southern half and with areas of the Guadalquivir Valley again above 40º. Tropical nights. Aemet also warns that minimal temperatures will also rise during these days, first in the southern half of the Atlantic aspect and from Wednesday in more extensive areas. According to these forecaststhe thermometers will not lower the 20-22 degrees in large areas of the southern peninsular half, and it is expected that during Thursday these minimums do not fall from the 25º in areas of the Guadalquivir. That is, some areas will return to the so -called “equatorial nights.” To the third, the defeated. The situation could be attenuated towards the end of the week. The models indicate that the anticyclone responsible for the heat that awaits us will gradually move to the east. Thus, the third of the storms that will circulate during this week will not be fully blocked by the anticyclone and could affect the north and east of the Peninsula from Friday. In Xataka | The hydrological bonanza could not be eternal: drought is a real threat after an extremely warm, and also dry June Image | ECMWF

The good news is that we have an anticyclone about Spain. The bad is that stability will last a sigh

by

All those who thought that the rains of March were A kind of Vogone curseit seems they were right. In fact, I don’t know if it is worth continuing to call them “March rains” because, despite appearances, the rain has not left anywhere. I was taking a breath. But we have a dorsal on top! It’s true. These days, it has entered A gigantic anticyclonic dorsal of subtropical origin that is not only very warm and very stable, but will cross the Peninsula and will continue to the north until it almost arrives in Iceland. And we will notice. Because, As Aemet already pointed out In his forecast for this week is that “it will be warmer than normal throughout the country, especially in the peninsular northwest.” However, it is not a normal dorsal. As Ángel Rivero explainedthis dorsal has a characteristic “finger” form (it is very elongated, but very narrow). That exposes the Peninsula below Danas and Borrascas Frías, both for the East and West. The problem is that this type of structures (very rare before, but from 2020 more and more frequent) are characterized by An extremely winding polar jet With air bags, ripping continuously. And, as we know, those airbags have a very erratic behavior: they are very difficult to pursue. And the first example comes Wednesday. The European model draws two cold storms one between the Canary Islands and the Azores (Olivier) and the other in the Gulf of Lion. As Collect Sergio Escaama in Meteoredboth storms go to Cerner on the Peninsula and will cause rains both in the northeast and in the southwest. If the scenarios are right, both storms would merge into a About the Gulf of Cádiz creating a fairly complex situation. Although we cannot determine the intensity and the trajectory, we do know that we must monitor it closely. From the middle of the week, we can expect rains in many areas of the country. And in Holy Week? As we are experiencing in our own flesh, the country’s meteorological context is complex. We are living a spring full of thermal ups and downs and huge rains. Thus, it is difficult to know what is going to What yes We can discard it is a persistent scenario of stability. If it does not rain on the key days of next week it will be by chance and not because it must necessarily be so. As I explainedduring the next few days we will have to be aware of the Azores anticyclone. Because if as it seems, zonal circulation is restored, everything will depend on whether the anticyclone lets go storms or not. Image | WXCHARTS In Xataka | Someone has left the water key open: the rain is back and the models say it will not leave until after Holy Week

The war between the Azores anticyclone and Iceland depression will have a clear winner in the coming weeks: Spain

by

If there is any field in which what was said by the famous physicist Niels Bohr that “it is difficult to make predictions, especially of the future“That is meteorology. Although it is not always the case. There are times that, with all the uncertainties we want, “we see them come long before normal.” And that is what just happened: the main prediction models in the world They say we are going to a negative nao stage. Something that, in the face of spring, can be excellent news. What is NAO? ‘Nao’ are the acronym in English of ‘North Atlantic oscillation‘And basically refers to the’ dance ‘between the Azores anticyclone and the loss of Iceland, the two great atmospheric phenomena that govern the meteorology of the North Atlantic. When the index we use to “measure who is winning” is negative, the anticyclone of the Azores is weaker than normal and, therefore, cannot block the deep storms of the Atlantic. The direct consequence is that, they circulate further than normal: in our latitudes. Kristian Strommen et als. (2021) The news is that, indeed, it seems that we are going to Noa negative. Both the NOAA American and the European ECMWF They coincide in which “we are at the gates of a Nao phase in descent.” And what consequences would this have? The combination of a negative nao and a large mass of stagnant polar air in the continent would cause the circulation of deep storms to pass us over and, therefore, the weather conditions are stirred. A summary of the situation. In the short term, we are in the midst of that cyclogenesis festival that we have already talked about, but when the stability will be installed again. That means that nocturnal temperatures will lower, the frost will return and the fog will return. From then on, if the NOA phase change is confirmed, the situation becomes difficult to predict. The good part of this type of diagnoses is that it is very solid (that is, it is quite likely to pass); The bad is that the details become more complex: it can be triggered from a sudden stratospheric warming that froze everything that caught its path to almost nothing. It is reasonable to wait for rain in one way (deep storms) or another (retrograde danas), however the prognosis is in the air. Image | Tropical tidbits In Xataka | In the next few days, Spain will be in the middle of a hall of Atlantic storms. It is good news, but not for everyone

Log In

Forgot password?

Forgot password?

Enter your account data and we will send you a link to reset your password.

Your password reset link appears to be invalid or expired.

Log in

Privacy Policy

Add to Collection

No Collections

Here you'll find all collections you've created before.