Spain’s weather agency Agencia Estatal de Meteorología (AEMET) and the Servei Meteorològic de Catalunya (Meteocat) have issued an orange warning for heavy showers and local thunderstorms in parts of Catalonia for Tuesday, 6 October 2026. The official warning maps indicate high hourly rainfall intensities, especially in the Prelitoral de Barcelona and parts of the Costa Brava and adjoining inland areas. The worst conditions are expected in the afternoon and evening.
According to the authorities, high rainfall totals are possible locally over a short period, accompanied by lightning, strong gusts and small hail. Models point to an unstable air mass with localised convection, which could produce narrowly concentrated, very intense cells. Forecasts emphasise the high degree of spatial variability: while nearby places may see only light showers, storm conditions could occur just a few kilometres away.
The main risks identified by the services include sudden flooding in low-lying areas, underpasses and along streams, aquaplaning on motorways and arterial roads, and short-term disruption to urban infrastructure. In the metropolitan area Barcelona attention has been drawn to the vulnerability of the urban drainage network during heavy rain. The authorities advise people to avoid underpasses, seafront promenades and flood-prone crossings during intense rainfall, and to keep travel plans flexible.
Orange level (“aviso naranja”) signals a serious situation, though it remains below the highest alert level. Municipal services and transport operators are preparing for conditions to change rapidly. Residents should follow official advice and pay attention to short-notice updates; warning areas may change dynamically during the day, particularly if thunderstorms become stationary.
The current situation follows several wet days at the start of the month, when heavy showers were recorded across much of the north-eastern half of the Iberian Peninsula. For Catalonia AEMET and Meteocat stress that today’s setup, with an unstable, moist air mass over the Mediterranean region, increases the likelihood of locally very high hourly rainfall totals. Whether and where significant impacts occur will therefore depend largely on the development of individual storm cells, which are currently expected to form mainly between the coast and the foothills.
Editor: Andreas M. Brucker (Article created with AI assistance).