Catalonia Experience of Heavy Rain: An Analysis of September 2024

A Wet Season Start

The month of September 2024 marked a drastic change in the climate of Catalonia with an episode of intense rain that took place between days 3 and 4. According to the Meteorological Service of Catalonia, the precipitation was general, with accumulations ranging from ·washed between 20 and 50 mm in most regions.

Most Affected Areas

The areas of Ponent, Central Catalonia and the south recorded more than 50 mm, while regions such as Alt Empordà experienced minimal rain, less than 5 mm. La Granadella, located in Les Garrigues, was one of the highlights with an impressive accumulation of 87.5 mm.

A Historical Day

September 4 became the day with the most precipitation in Catalonia since April 29, with particular relevance in areas that usually receive little rain. In some cases, this day was the rainiest in the last five years in parts of Ponent.

Rain intensity

Weather conditions were extreme, with records exceeding 20 mm in just 30 minutes in several localities, Granollers being the most prominent with 34.3 mm in this short period.

Storms and Waters: A Second Episode

Between September 6 and 8, Catalonia faced a new episode of strong storms, with hail in some places. This phenomenon was caused by an atmospheric disturbance that caused accumulations of more than 80 mm in several localities.

Remarkable records

Montblanc, Querol and Arenys de Mar were some of the localities that recorded the highest amounts, with 123.0 mm, 95.6 mm and 90.2 mm, respectively.

An Unusual September

From September 17 to 24, Catalonia continued to experience irregular rains, with rainfall exceeding 200 mm in some southern areas. This situation was caused by an atmospheric depression that mainly affected the coast.

Impact of Precipitation

The heaviest downpours were concentrated between the 17th and 21st, with amounts reaching close to 100 mm in a single day. In Ametlla de Mar, 244.9 mm were recorded, while in Viu de Llevata the figure was 160.3 mm.

A Look into the Future

As October approaches, forecasts do not indicate a significant increase in rain. This invites us to reflect on the importance of water management and preparation for possible droughts in the future.

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