Home / Weather / UK Weather Alerts: New Matrix for Storm Warnings
UK Weather Alerts: New Matrix for Storm Warnings
22 Oct
Summary
- A new harmonised matrix for weather warnings is effective from October 2026.
- Warnings are colour-coded based on impact likelihood and severity.
- Red warnings signify rare, dangerous weather with a high risk to life.
The UK's National Severe Weather Warning Service (NSWWS) has implemented a new harmonised matrix, effective October 2026, to enhance consistency in its alert system. This collaborative effort by the Met Office and other hydrological agencies assigns colours to warnings based on both the severity of potential impacts and their likelihood.
These colour codes range from yellow, indicating moderate impacts like travel disruption, to amber, signifying increased likelihood of significant disruption and potential risks to life and property. Amber warnings necessitate changes in plans for protection.
Red warnings, the highest alert level, are reserved for rare instances of dangerous weather. They signal a very high likelihood of a risk to life, substantial travel disruption, power outages, and widespread property damage, requiring immediate action and adherence to emergency service advice.
