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Catalonia braces for severe thunderstorms with heavy rainfall forecast

Heavy thunderstorms are forecasted for Catalonia today with warnings of intense rainfall exceeding 40 liters per square meter.

Jordi Cubarsi Jordi Cubarsi · August 25, 2026, 12:53 · 3 min de lectura

The Generalitat has issued a warning for intense storms expected to hit Catalonia this afternoon, with rainfall potentially exceeding 40 liters in just half an hour. Residents are urged to exercise caution.

Severe weather is on the horizon for Catalonia as the Generalitat has activated its flood alert system, Inuncat, due to forecasts predicting intense thunderstorms starting this afternoon. The anticipated downpours could deliver over 40 liters of rain per square meter within a mere half-hour, particularly affecting regions in the west and north of the autonomous community.

The Servei Meteorològic de Catalunya (SMC) has identified several areas at risk, including Alt Urgell, Noguera, Pallars Jussà, Pla d’Urgell, Segarra, Segrià, Solsonès, and Urgell. These regions are expected to experience not only heavy rain but also violent weather phenomena such as strong winds and hailstones measuring over 5 centimeters.

In light of these conditions, Protecció Civil has advised residents to remain vigilant regarding mobility and outdoor activities. The agency’s statement emphasizes that while some areas may see lower rainfall levels—around 20 liters per square meter—the potential for localized flooding remains significant.

The SMC has also issued a secondary warning regarding possible rainfall accumulation exceeding 60 liters over three hours, although this scenario is deemed less likely due to the transient nature of the storms. Nonetheless, areas like Alt Urgell and Noguera could still face challenges if conditions align.

The Catalan Water Agency does not anticipate major increases in river flows; however, should rain accumulation exceed critical thresholds of 40 liters, smaller streams and gullies may be impacted. This situation echoes past events where similar weather patterns led to significant flooding in urban areas.

The Confederación Hidrográfica del Ebro (CHE) predicts that the most affected regions will be those within Lleida’s basin. Fortunately, current river capacities are high enough to manage typical storm runoff without immediate concern.

As evening approaches and transitions into nightfall, forecasts suggest a decrease in precipitation likelihood across Catalonia’s northwest quadrant. However, residents are encouraged to stay informed through local weather updates as conditions can change rapidly.

This warning serves as a reminder of last summer’s severe storms that caused widespread disruption across various municipalities in Catalonia. As communities prepare for potential impacts from today’s forecasted storms, it is crucial for individuals to plan accordingly—whether by avoiding travel during peak storm hours or securing outdoor items that could become hazardous in high winds.

For those needing guidance on safe travel routes or shelter options during inclement weather today, local authorities recommend checking real-time updates via municipal websites or social media channels dedicated to emergency management.

Jordi Cubarsi
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Jordi Cubarsi

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