Winter Storm Christoph was named by the UK Met Office on 18th January. The storm produced a convective rainstorm which brought severe flooding to the United Kingdom. The peak of the flooding emergency occured around 21st January but the impacts of the storm were felt until the 26th.

Ambiental was actively monitoring Storm Christoph and conducted a review of the properties and postcodes which fell within the flood warning areas. Our analysis calculated the number of properties within warning areas by postcode and predicted which properties were likely to be flooded based on spatial analysis of our UK FloodScore™ database.

During the event we monitored media reports and river levels. In the immediate aftermath we commissioned a post event review where our team of flood analysts collated information and analytics on the event. Ambiental supported our clients with data and analysis and performed successful verifications of our flood hazard map predictions against the recorded instances of flooding.

By comparing our models to Storm Christoph we are able to determine the predictive accuracy of our high precision UK FloodMap product. Some of the results of this work are presented here in our UK Flood Event Analysis Report which is free to download. The summary report also includes relevant event information from definitive sources such as the Environment Agency and Met Office.

As Storm Christoph approached over 300 flood alerts were issued by the Environment Agency in the three days leading up to the storm hitting. The impact of Storm Christoph was widespread, with 675 properties flooded across England and Wales. A major incident was declared in South Yorkshire as Storm Christoph brought more torrential rain and flooding to the area already badly hit by Storm Bella in late December 2020.

The Ambiental flood report and our summary datasets from Storm Christoph will remain freely available from our website in order to support with the ongoing emergency response effort and for the benefit of wider society in dealing with the ever growing challenge of flooding in the UK and beyond.

Our Storm Christoph event report contains 18 pages of information and analysis including:

• Event timeline
• Rainfall analysis
• Flood forecasts & alerts
• River levels
• Impacts to property
• Insured losses
• Photos and satellite imagery

Click on the button above to get the full post-event report or visit this page to arrange a free 15 minute consultation to discuss how Ambiental can support with mitigating climate risk from flood damage and other climate related perils.