Atlantic storm forecast to bring persistent heavy rain to western Spain from 6 November

Storm timing and flood warning

AEMET has issued a note warning that a deep Atlantic storm will reach Spain and the Canary Islands, bringing showers described as strong, persistent and accompanied by thunder. The agency says the system will form west of the Azores before approaching the Peninsula early next week. Its spokesperson, Rubén del Campo, said the change will be noticeable from Saturday, 7 November, when warmer southerly winds lift minimum temperatures by as much as 8 degrees above Friday's level and frosts disappear. The first front is expected to enter northwest Spain on Friday, 6 November, with local showers in western Galicia and very strong gusts on high ground in Galicia and the Cantabrian range.

The agency also warns of flooding in its note, and its wording is reproduced below.

“Local flooding in low-lying areas and river rises could occur.”

Successive fronts are forecast for Sunday, Monday and Tuesday, 8 to 10 November, with the heaviest rain concentrated in the west of the Peninsula. Parts of the Atlantic coast could also see waves of up to six metres during the episode.

Seville and the wider west

After a dry spell, Seville is expected to see rain from Sunday, 8 November, with the wettest day forecast for Monday, 9 November. Forecasts cited for the city put totals at about 50 litres per square metre over four days, with 10.8 mm on Sunday, 17.6 mm on Monday, 9.2 mm on Tuesday and 12.4 mm on Wednesday. Winds could reach 60 km/h on Monday, and temperatures are expected to fall progressively through the week.

2026-11-0810.8

2026-11-0917.6

2026-11-109.2

2026-11-1112.4

2026-11-08

10.8 mm

2026-11-09

17.6 mm

2026-11-10

9.2 mm

2026-11-11

12.4 mm

Data from the article text

For context, the same forecast notes that 69.4 litres per square metre fell in Seville on 29 October 2025, the highest daily total in a series that began in March 2010. AEMET puts the official city record at 109.3 mm, set on 2 November 1997. Further west, the meteorologist Jorge Rey, known for forecasts based on cabañuelas, says accumulations could exceed 200 litres per square metre in western Andalusia and northern Extremadura, with rain from Sunday afternoon to Wednesday, 11 November. Meteored warns of accumulations in Andalusia and Extremadura, with some scenarios above 150 l/m².

Canary Islands and La Palma

Rain in the Canary Islands is expected to start on Friday, 6 November, with heavy showers in the western islands and a focus on La Palma. Showers described as very strong, with storms, are forecast for Saturday, 7 November, starting in the west of the archipelago and spreading to the rest of the islands on Sunday. Rey puts the risk on La Palma at up to 100 litres per square metre in 24 hours during Sunday, a figure drawn from his own method rather than an official warning.

Track still uncertain

Forecasters remain unsure where the system will end up. Xataka describes three low-pressure centres that could orbit one another west of the Azores, with one expected to dominate by Monday, 9 November. The moisture plume feeding the storm could reach Galicia, the Grazalema sierra or several other areas, and a small shift in the system could move it hundreds of kilometres. AEMET also says uncertainty remains over the storm's evolution and track, so the totals above may change as the date approaches.