With the advent of December bridgeMillions of people in Spain look to the sky to decide whether to take a short break, stay close to home, or head for the mountains. The holidays of Constitution Day and the Inmaculada Concepción They're offering several consecutive days off again, and the weather will be key for organizing road trips, ski resort bookings, or simple outdoor plans.
The forecasts of the main meteorological services, among them the AEMET And specialized platforms point to a somewhat hectic scenario in the days leading up to it, with the arrival of Atlantic fronts, rain and windBut with a trend towards a calmer atmosphere during the long weekend itself. The temperature, however, will behave in a decidedly un-wintery manner in many areas, with mild temperatures and above-average values in many parts of the country.
The start of December: Atlantic fronts, rain and cold weather
The beginning of the month is accompanied by successive Atlantic fronts moving from west to east, these frontal systems will bring noticeably changeable weather. During the first days of December, they will bring frequent rainfall in large areas of the Peninsula, with particular impact on Galicia, the Cantabrian coast and Castile and Leónwithout ruling out that they will reach Extremadura and the central zone.
In this context, the influence of a colder air mass of polar originwhich has led to a notable drop in temperatures, with frosts in inland areas and the first snowfalls in mountainous areas. The snow level, during the coldest periods, may be around 800-1.200 meters in the northern part of the Iberian Peninsula, therefore some mountain pass It could be affected and it will be advisable to check the road conditions.
Throughout this first half of the week, the fronts will be passing through, leaving alternating days of greater stability with rainier daysIn the Northern Plateau, the maximum temperatures could remain below the average for several days. 10 ° C, while on the Mediterranean coast they will be around 18-20 °C, reflecting a strong thermal contrast between the interior and the southernmost and eastern coasts.
AEMET also forecasts fog banks in the interior of the peninsula, especially in plateau areas and river valleys, which can reduce visibility and complicate traffic in the early hours of the day. These fogs will be linked to the presence of persistent low cloud cover at certain points, especially when more stable situations begin to prevail.
Influence of the polar jet stream and Atlantic storms
Much of this weather pattern is explained by the presence of a very active polar jetoriented from west to east, whose undulations and waves at height reach the Iberian Peninsula. This upper-level flow favors the formation of deep storms in the North Atlantic, some of which are approaching Western Europe and even directly affect Spain with its associated fronts.
Various analyses, both European and American, agree that this will continue during the days leading up to the bridge. transit of troughs and frontal systemsThis will result in More frequent rain episodes in the northwest and northern third of the country, while in the south and southeast rainfall will tend to be less abundant and more irregular.
In addition to the rain, at times the copper wind takes center stage, especially in areas of North Atlantic peninsular and in mountainous areas. They may occur strong gusts associated with the passage of more active fronts, which will also be reflected in the state of the sea, with maritime storm on the Cantabrian coast and waves that can exceed five or six meters in the most intense episodes.
Despite this unstable environment, models suggest that No outbreaks of extremely cold air are expected. in these early days of December. Temperatures will, in many cases, be slightly above average. of the period, especially in the center, northern third and Mediterranean areas, while in some southern regions they could remain somewhat lower than usual.
In terms of snow, the most significant accumulations will be concentrated in high elevations of the north and the Central Systemwhere the use of chains in certain mountain sections. This scenario, although variable, is reasonably favorable for the ski resorts that depend on the accumulation of snow at high altitudes to start their season.
What the weather forecast looks like for the December long weekend
As the holidays approach December 6 and 8Forecasts point to a Change of trend compared to the beginning of the month. Although uncertainty increases the further we look into the prediction horizon, several scenarios agree that the long weekend could be marked by a more stable environment, rising temperatures and less rain than in previous days.
According to the latest forecasts from AEMET, entry will still be possible during the long weekend. some fronts in the northwestbut their activity would be more limited. Rainfall would be concentrated mainly in Galicia and parts of the Cantabrian coastwithout ruling out some showers in mountainous areas of the north and around the Central System. In the rest of the territory, especially in the interior of the Peninsula and in much of the south, a drier and calmer weather.
The spokesperson for the State Meteorological Agency has indicated that, if this scenario is confirmed, the long weekend would be characterized by mild temperatures for this time of year, with a rise in the nighttime minimums and maximums that could exceed 18-20 ºC in the Cantabrian region and up to 22 ºC in Mediterranean areas such as the Valencian Community, Murcia, or parts of eastern Andalusia. In inland cities, such as Madrid or Valladolid, levels could be reached values close to 14-15 ºC in the middle of the day, away from the harshest cold of early December.
Regarding the snow, the rise of the dimension It will be evident. During the bridge, the isotherm will generally be above the 2.000 metersso that snowfall will be restricted to high mountain areas and with little impact on main communications. Access to [the area] will still need to be monitored. high portsHowever, a widespread snowfall episode at low elevations is not expected.
Regarding the wind, it's possible that it will still be noticeable at the start of the long weekend, especially on Friday. strong gusts in the northwest and coastal areas of Cantabriaassociated with the approach of a weather front. However, the trend would be for those gusts to be losing strength As the hours passed and the atmosphere generally became more peaceful during the long weekend.
Regional differences: rainy north, calmer interior and south
The situation expected for the December long weekend will not be identical throughout the country. The clearest sign points to a Northwest and Cantabrian coast with intermittent rain In front of a The interior and southern parts of the peninsula will experience generally more stable weather.Galicia, Asturias, Cantabria and the Basque Country could continue to register rain episodesespecially in the early hours of the weekend, although with a clear tendency for rainfall decrease as the days go by.
In areas such as Galicia and western Castile and LeónIt is likely that they will still appear on Friday and Saturday moderate rainfall associated with the passage of fronts, with more persistent showers on the Galician Atlantic coast. Towards Sunday and the public holiday Monday, the most likely scenario is that the rainfall are already quite restricted to the northwest coast and points in the far north of the peninsula.
On the contrary, in much of central and southern parts of the Peninsula The forecasts paint a picture much more stable bridgeIn large areas of Castilla-La Mancha, Extremadura, Andalusia and the Southern Plateau the risk of rain would be low, with cloudy intervals and sunny spellsIn these regions, the main change compared to previous days will be the rise in minimum temperatures, which will leave behind the widespread frosts and move around 5-8 °C in numerous inland capitals.
In provinces of southern and Mediterranean Andalusian coast, such as Malaga or Almeria, as well as in the Region of Murcia and the Valencian Community, the environment could turn out particularly soft, with highs close to 20-22 ºC and warmer nights. The probability of rain in these areas is considered low, although some light and isolated drizzle linked to low cloud cover cannot be ruled out.
The Canary Islands, for their part, will maintain a somewhat different pattern, dominated by the trade winds. They are expected Cloudiness and light rain on the northern slopes of the more mountainous islandswith generally stable and mild temperatures, without any notable changes during the holiday period.
Fog, low cloud cover and mild wind chill
One of the elements that could define the feeling of time during the bridge is the combination of persistent low cloud cover and fog in many inland areas. Forecasts indicate that, after the passage of the most active fronts, a more anticyclonic scenario in the middle and upper layers of the atmosphere, but with enough moisture at lower levels to favor the formation of dense fogs.
These fogs would be especially likely in valleys and river basins of rivers like the Guadalquivir, Guadiana and Taguswhere they could persist for much of the day. Where fog does not form, they may remain skies very overcast with low cloudswhich will leave a feeling of a gray atmosphere, although without heavy rainfall.
This type of weather, with low clouds and no clear skies in the early morning, tends to trigger minimum temperaturesThe combined effect of the warm air mass of Atlantic origin and cloud cover will prevent a significant nighttime cooling, so that temperatures will be comfortably exceeded in almost the entire country. 0 ° CIn many inland capitals, the minimum temperatures will be around or above 5 ° C, fairly mild values for this time of year.
During the day, the maximum temperatures will be placed at values gentle but restrainedThe presence of cloud cover will limit the rise in temperatures, so there will be more talk of temperate environment That's hot. In the north, the highs will be around 10-15 °Cwhile in the south and Mediterranean areas, registrations will be possible between 18 and 22 ºC in times of greatest prosperity.
This combination of Few frosts, pleasant highs and occasionally gray skies It is very different from the classic image of a winter holiday weekend with intense cold and widespread snowfall, but it fits the trends of this start of meteorological winter, which points to a period with temperatures slightly higher than usual In a large part of the country.
Tips for traveling and planning activities during the long weekend
For those planning road trips, the forecast weather requires some caution, though no cause for alarm. In the days leading up to the long weekend, the passage of Fronts with rain, wind and snow in the mountains It can affect circulation, especially in Galicia, the Cantabrian Mountains, the Central System and the PyreneesIn these areas it is advisable consult official notices and the condition of the roads if you are going to cross mountain passes.
With the holidays approaching, the main risk could come from the poor visibility due to dense fog in inland areas, rather than from widespread rain or snowstorms. Drive with appropriate lighting, maintain a safe distance And moderating speed will be key measures to minimize incidents on stretches affected by fog or low clouds close to the ground.
Those planning to take advantage of the long weekend to hiking or mountain activities They should bear in mind that, although the weather tends to stabilize, there will still be snow at high elevations and wind on ridges or passes during the first half of the period. Equip yourself with Appropriate clothing, hiking boots and, if necessary, snow chains or winter tires This is a basic recommendation if you are accessing high mountain areas by car.
For getaways to cities, coast or rural tourism in the south and the MediterraneanThe atmosphere will generally be quite favorable: scarce rainfall, mild temperatures and no extreme coldHowever, the presence of fog in inland valleys can reduce hours of sunshine, so it's best not to be overconfident if you're looking for completely clear days.
In any case, given that this is a period with fronts still lurking in the Atlantic and some residual instability, it is advisable Check the latest forecasts before starting the trip, especially if you are going to travel long distances or depend on the state of the sea, wind or snow for certain activities.
The picture painted by the models for the December bridge In Spain, the month is starting off turbulent, with fronts, rain, and some snow in the mountains, with a clear trend towards a a more stable atmosphere and mild temperatures During the holidays, the northwest and the Cantabrian coast will continue to be the areas most likely to experience rain, while the interior and south will enjoy calmer weather, characterized by fog, low cloud cover, and moderate cold. With no significant temperature extremes and snow confined to higher elevations, the overall outlook is favorable for travel and making plans, provided you keep an eye on the skies and official weather warnings.
