Severe Flood Warning: National Test Flood Warning Area — National Test Flood Warning Area

Measurements

Official source

MeteoAlarm. Data provided by EUMETNET members.

This is an official warning issued by the authority named above. Follow its instructions and those of your local emergency services.

Severity as published by MeteoAlarm (EUMETNET).

Also reported by: WMO

This event as JSON · API and licence

Source updated 28 days ago (Sep 21, 2026 14:24 UTC) · we last heard from MeteoAlarm (EUMETNET) 1 minute ago

Satellite view, before and after

The latest clear Sentinel-2 pass before this event and the earliest one after it.

25 Aug 2026, 27 days before this event. 2.8% cloud across the tile.

1 Oct 2026, 10 days after this event. 13.3% cloud across the tile.

The white ring marks where the event was reported.

Each image is a preview of a whole Sentinel-2 tile — an area of roughly 110 by 110 km, where one pixel is about 320 metres — not a close-up of the event, which may be a small part of it. "Clear" means under 30% cloud across the entire tile, so the exact place that matters can still be hidden. These are pictures for context, not an assessment of damage.

Contains modified Copernicus Sentinel data 2026, found through the Earth Search catalogue (Element 84) and served from the AWS Open Data Sentinel-2 archive.

Official authorities in United Kingdom

If you are there, these are the bodies whose instructions apply. This site is not an emergency service and does not issue warnings.

• Met Office weather warnings
• Environment Agency flood warnings

What to do

Follow the instructions issued by MeteoAlarm (EUMETNET) and your local emergency services. The guidance below is background.

Flood preparation, evacuation decisions, and the dangers of driving or walking through floodwater.