Aemet raises the alert and anticipates a red warning for the DANA in Valencia as some areas face 300 liters of rain

A DANA is a weather system in which cold air becomes isolated high above the surface. The cold air makes the atmosphere unstable, especially when it meets warmer air below. This matters because unstable air can rise quickly, forming tall clouds, thunderstorms, and intense rainfall. The reports describe DANA Adam affecting eastern Spain and the Balearic Islands until Monday.

The mechanism is strongest near the Mediterranean. Warm sea air contains abundant moisture. When that air rises beneath the colder air aloft, it cools and condenses into clouds. Repeated storms can form over similar areas, making rain persistent rather than brief. The reports warn of accumulations exceeding 300 liters in some locations and describe torrential downpours and possible flooding.

The immediate concern is eastern Spain, including Valencia, where Aemet raised the alert and anticipated a red warning. The episode is linked to two danas this weekend, not just one. Conditions may remain dangerous through Monday, so heavy rain, thunderstorms, and flooding are the central risks highlighted by the reports.

Aemet’s red warning is the highest-level alert described in the reports. It means the expected weather could be exceptionally hazardous and cause serious disruption or danger. For people in Valencia, this is a signal to avoid treating the forecast as routine rain. The warning matters because the predicted event includes torrential rainfall, storms, and possible accumulations near 300 liters in some places.

The practical response is caution. People should follow Aemet and local authorities, avoid unnecessary travel during the worst rain, and never enter flooded roads or low-lying areas. They should also keep away from rivers, barrancos, and places where water can rise quickly. These precautions are especially important when rain falls intensely and repeatedly over the same area.

The reports say Aemet raised the alert and anticipated a red warning for Valencia. They also place affected areas across the eastern peninsula and the Balearic Islands. The risk is expected to continue through Monday, so conditions can remain dangerous even after the first storm passes.

The reports repeatedly mention rainfall totals of up to 300 liters in some locations, while Aemet’s special warning refers to accumulations above 300 liters. In weather terms, liters per square meter are equivalent to millimeters of rain. So 300 liters per square meter means a 300-millimeter layer of water if none runs away or soaks in.

That is a huge amount for a small area. Imagine placing a one-square-meter tray outdoors and collecting 300 liters of water in it. The same volume may fall across streets, roofs, fields, and hillsides. Ground and drains may not absorb or carry it quickly enough, particularly when storms repeatedly pass over the same zone. Runoff then becomes rapid and concentrated.

The forecast is not a uniform amount for every place. It identifies the hardest-hit points, not the whole region. Reports describe intense, persistent rain in eastern Spain and the Balearic Islands, with the episode lasting until Monday. Such totals explain the warnings about storms, inundations, and flooding.

When hundreds of liters fall quickly, the main danger is that water arrives faster than soil, drains, channels, and rivers can carry it away. Rain can collect on streets and move downhill as powerful runoff. Rivers and barrancos may rise sharply, while low-lying areas can become inundated. The reports specifically warn of storms, flooding, and accumulations above 300 liters.

A town near a river or barranco faces extra exposure because water naturally concentrates in those channels. If intense storms keep forming over the same area, the flow can continue rising even after rain has eased locally. Coastal zones can also receive runoff from inland areas, while heavy rain may disrupt roads and urban drainage. These effects can happen rapidly during torrential downpours.

The current forecast covers eastern Spain and the Balearic Islands, with Valencia facing a possible red warning. The reports describe rain as intense and persistent until Monday. That combination means communities must prepare for both sudden flooding and prolonged water accumulation, following official alerts as the situation develops.

Unusually warm seawater provides extra energy because it increases evaporation and supplies the atmosphere with heat and moisture. That matters during a DANA, when the atmosphere is already primed for instability by cold air higher up. More moisture means clouds can release more rain, while extra heat helps air rise and strengthens storm development.

The reports describe “much energy accumulated in the sea” because of record temperatures. In practical terms, warm water continually feeds humid air into the lower atmosphere. If that air is lifted by the disturbance, it cools, condenses, and forms heavy clouds. Condensation releases heat, which can support further rising and repeated thunderstorm growth. The result can be intense, persistent rainfall.

This is part of the explanation for the sharp weather change forecast for the weekend. Two danas are expected to bring torrential rain, with totals reaching 300 liters in some points. Eastern Spain and the Balearic Islands remain at risk through Monday, according to the reports.

Cold air high in the atmosphere sits above warmer, moisture-rich air near the Mediterranean. This sharp temperature contrast makes the atmosphere unstable. Warm air is lighter and tends to rise, while the cold air above allows that rising motion to continue. As the air climbs, it cools, and its water vapour condenses into cloud droplets.

That process builds deep thunderclouds. Condensation releases heat, helping the rising air stay buoyant and strengthening the storm. If winds or the weather system keep supplying moist air, new storm cells can develop repeatedly. When those cells remain over or move across the same area, rainfall becomes intense and persistent. The reports connect this setup with storms, inundations, and totals above 300 liters.

DANA Adam is forecast to affect eastern Spain and the Balearic Islands until Monday. The broader weekend outlook mentions two danas and a sudden change in weather. Warm Mediterranean waters provide the moisture and energy, while the cold air aloft supplies the instability needed for powerful thunderstorms.

Eastern Spain is especially exposed because it borders the Mediterranean, the moisture source highlighted in the reports. When sea temperatures are unusually high, the lower atmosphere can contain more humid air. A DANA arriving above that air can trigger strong uplift, thunderstorms, and repeated rain. The reports identify eastern Spain and the Balearic Islands as the main affected areas.

The coast also receives weather systems directly from the sea, while nearby hills and valleys can force moist air upward. That lifting helps clouds grow. Rainfall can then become concentrated rather than evenly spread. If storms repeatedly affect one location, water accumulates quickly and flows toward rivers, barrancos, towns, and coastal areas. This is why a forecast of 300 liters in some points is particularly serious.

The current episode involves DANA Adam and, more broadly, two danas forecast for the weekend. Aemet raised the alert and anticipated a red warning in Valencia. Rain and storms are expected to continue across the east and the Balearic Islands until Monday, keeping flood concerns active.