Storms hit Barcelona comarcas as Catalonia activates flood pre-alerts through Saturday

Severe storms hit Barcelona comarcas

A sudden shift in weather conditions brought severe thunderstorms, hail, and high winds to several comarcas across the province of Barcelona on Thursday afternoon. Between 16:00 and 17:00, the Bombers de la Generalitat logged approximately 50 emergency calls within less than an hour. Emergency crews were dispatched primarily to remove fallen trees blocking roads, secure damaged urban street furniture, and clear localized water accumulations and minor street flooding. The Vallès Occidental comarca recorded the highest concentration of emergency interventions, though storm damage was also registered in adjacent inland areas. Despite wind gusts exceeding 90 kilometers per hour and scattered hailstorms, emergency services confirmed that the incidents resulted only in material damage, with no personal injuries reported.

Flood pre-alerts and coastal safety measures

In response to the severe convective episode, Protecció Civil de la Generalitat activated the pre-alert phase of the Inuncat special emergency plan for flood risk. The civil protection pre-alert status was scheduled to remain active from Thursday afternoon through Saturday. The meteorological agency issued violent weather warnings across seven specific comarcas in the Barcelona area: Vallès Occidental, Vallès Oriental, Baix Llobregat, Anoia, Alt Penedès, Bages, and Lluçanès. Strong wind gusts also affected southern coastal territories, particularly in the Tarragonès comarca. Municipal authorities and lifeguards in Tarragonès raised red flags to prohibit swimming across the majority of coastal beaches due to adverse maritime conditions and strong winds.

Meteorological causes and Friday progression

According to the Servei Meteorològic de Catalunya (Meteocat), the stormy episode follows a stretch of intense mid-August heat, representing a weather pattern typical of the second half of the month when calm days alternate with violent storms. The instability is driven by the confluence of an Atlantic trough arriving from the west and unstable air rising from the south, resulting in a regional drop in temperatures, heavy showers, and thunderstorms. Precipitation began during the early hours of Friday, with storms moving eastward across the territory. While lingering showers were confined to the northeast quadrant at daybreak, forecasters scheduled a new convergence line to form by mid-morning, reactivating precipitation across interior sectors of northeastern Catalonia.

Costa Daurada braces for Friday night peak

The weather agency mapped an evolving path for Friday afternoon, projecting precipitation to extend across other sectors of the eastern half of Catalonia, the Pyrenees, and the Pre-coastal range. By the late afternoon and evening hours, the focus of atmospheric convergence is forecast to shift toward the southern coastline. Meteorologists identified the Costa Daurada and its surrounding coastal areas as the central zone for the heaviest downpours of the multi-day storm front heading into Saturday.

It will be the main event of the episode, with very intense rain heading into the night from Friday to Saturday.

Meteocat maintained active danger warnings for rainfall intensity and violent convective activity across eastern and southern comarcas, urging continued monitoring as the storm front shifts along the Catalan coast through Saturday.