Environment Agency013WAFMUGtr Mancs Mersey and Ches
River Mersey Uplands catchment including Hyde, Ashton-under-Lyne, Denton, Stalybridge and Glossop: flood history since 2006
The Environment Agency has issued 44 flood alerts for River Mersey Uplands catchment including Hyde, Ashton-under-Lyne, Denton, Stalybridge and Glossop since 15 Mar 2006, most often in December; the busiest year was 2012 (9).
Flood alerts only
The flood area
- Flood area
- River Mersey Uplands catchment including Hyde, Ashton-under-Lyne, Denton, Stalybridge and Glossop
- Code
- 013WAFMU
- Environment Agency area
- Gtr Mancs Mersey and Ches
- County
- Barnsley, Cheshire East, Derbyshire, Oldham, Stockport, Tameside
- River or sea
- River Mersey
- First in the history
- 15 Mar 2006
- Latest in the history file
- 14 Nov 2025
- Current status
- check-for-flooding.service.gov.uk (the Environment Agency's live page)
Flood alert, flood warning, severe flood warning: what each means
Source: Environment Agency, Historic Flood Warnings (England); Environment Agency flood-monitoring API. Contains public sector information licensed under the Open Government Licence v3.0.
How many alerts and warnings a year?
Flood alerts, flood warnings and severe flood warnings (updates not counted), by year. 2026 runs to the end of June.
The numbers
| Year | Alerts | Warnings | Severe |
|---|---|---|---|
| 2025 | 2 | 0 | 0 |
| 2024 | 2 | 0 | 0 |
| 2023 | 6 | 0 | 0 |
| 2022 | 2 | 0 | 0 |
| 2021 | 3 | 0 | 0 |
| 2020 | 3 | 0 | 0 |
| 2019 | 5 | 0 | 0 |
| 2017 | 2 | 0 | 0 |
| 2016 | 2 | 0 | 0 |
| 2015 | 3 | 0 | 0 |
| 2014 | 1 | 0 | 0 |
| 2013 | 2 | 0 | 0 |
| 2012 | 9 | 0 | 0 |
| 2011 | 2 | 0 | 0 |
Source: Environment Agency, Historic Flood Warnings (England); Environment Agency flood-monitoring API. Contains public sector information licensed under the Open Government Licence v3.0.
When in the year?
All alerts and warnings since 2006 by month.
Source: Environment Agency, Historic Flood Warnings (England); Environment Agency flood-monitoring API. Contains public sector information licensed under the Open Government Licence v3.0.
Before July 2026: the latest in the history file
| Date | Level |
|---|---|
| 14 Nov 2025 | Flood alert |
| 20 Sep 2025 | Flood alert |
| 31 Dec 2024 | Flood alert |
| 22 May 2024 | Flood alert |
| 26 Dec 2023 | Flood alert |
| 24 Dec 2023 | Flood alert |
| 9 Dec 2023 | Flood alert |
| 21 Oct 2023 | Flood alert |
| 18 Jun 2023 | Flood alert |
| 12 Jan 2023 | Flood alert |
| 16 Nov 2022 | Flood alert |
| 19 Feb 2022 | Flood alert |
Source: Environment Agency, Historic Flood Warnings (England); Environment Agency flood-monitoring API. Contains public sector information licensed under the Open Government Licence v3.0.