Storm Claudia Delivers Additional Inundation to Portugal and Spain

The Iberian nations are again dealing with the consequences of extensive flooding in the wake of Tempest Claudia brought heavy rain and powerful gusts last week.

The Storm's Formation and Trajectory

The storm system developed from an area of low pressure that had beforehand caused early season freezing temperatures and snowfall through the eastern regions of the Canadian territory and the north-eastern United States during the beginning of the eleventh month.

Claudia moved eastward across the Atlantic during the second weekend of November before losing momentum and stopping to the northwestern area of the Iberian region, snared in a dip of an ever more meandering atmospheric river.

Consequences for the Iberian Peninsula

Galicia in north-west Spain was the first affected, with 80-150mm of rain falling along its Atlantic coast in just one full day up to Wednesday night as a leisurely moving system of rain drifted across western parts of the region.

Further showers and thunderstorms on Thursday led to floods to areas in Portugal where a senior pair died in the capital Lisbon after water from the overflowing Tagus River entered their home as they slept.

Unsettled atmospheric states persisted into the weekend, with a twister ripping through a camping ground and a close-by inn in Albufeira in southern Portugal on Saturday last week, killing an 85-year-old British woman and injuring 28 people.

Extended Consequences across the European continent

This system triggered broader repercussions across western Europe. By drawing warm air from the subtropical zones, the system assisted in raising temperatures in France's south-west to nearly 30 degrees Celsius, the country's highest recorded autumn temperature.

By Friday, this tropical air mass collided with a cold air mass across the northern regions of the continent, generating a band of rain stretching from Ireland's west to the Russian Federation.

In the United Kingdom, this stationary front of rain produced record-breaking rain accumulations, causing severe flooding in Wales.

As the storm progressively weakens early this week, the frigid air will push south, delivering to Europe its premier experience of winter.

Related Incidents in California

The US state of California encountered a plume of tropical moisture the previous week, bringing heavy rain and strong winds that resulted in sudden inundations and landslides in areas impacted by wildfires earlier this year.

More than 50mm of rain fell in southern California on Friday, with a another 50 millimetres broadly over the state on Saturday.

More than 100mm of rain accumulated over coastal parts of southern California in aggregate, attaining 200mm overall in locations at higher elevations.

Such a weather system is a concentrated stream of warm, moist air stemming from the tropical or subtropical regions.

Locations with fire damage including Palisades and Altadena experienced the most severe the rapid inundations and earth movements, forcing residents to flee.

In other parts of the state, a man in his seventies died after his vehicle was washed off a inundated overpass, and a child of seven years and her father were dragged into the sea by large waves on the Central Coast.