Historic Flood Warnings and Flood Alerts

These datasets show all messages issued for flooding from rivers or the sea in Wales since 2006.


There are three flood warning codes:


Flood Alert - flooding is possible; be prepared (replaced Flood Watch in 2010)

Flood Warning - flooding is expected; take immediate action

Severe Flood Warning - severe flooding is expected; danger to life

Environment Agency Wales provided data up until 1 April 2013. Since then, it has been provided by Natural Resources Wales.


The data is split across two Excel files. The first covers February 2006 to July 2024, when the Environment Agency’s Flood Warning System (FWS) and Floodline Warnings Direct (FWD) systems were in use. The second file contains data from July 2024 onwards, following the transition to our NRW-owned Flood Warning Information Services for Wales (FWISfW).

Identification

Identifier
NRW_DS116342
Alternative Title
  • AfA435 Historic Flood Warnings and Flood Alerts
Metadata Language
English
Lineage

Please note that from January 2011, the Flood Alert code replaced the older Flood Watch code. This historic dataset therefore contains Flood Watches rather than Flood Alerts prior to this date.
Additional Information

Live flood warnings in force are available on the NRW website https://flood-warning.naturalresources.wales/

Dataset Reference Date (Publication)
2026-06-29
Owner
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Originator
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
 

Extent

Extent

Geographic Extent
Wales (WLS)
N
W
E
S
Map representing the geographic extent of the dataset


 
 

Distribution

Distribution

Format Type and Description
  • Delimited ( Unknown )

    Specification

    Excel Spreadsheets

Resource Locator
Download Data and Web Service ( WWW:LINK-1.0-http--link )
 

Quality

Data quality

Quality Scope
Dataset
Conformity
Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services
Explanation

This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
Degree
false
Lineage

Please note that from January 2011, the Flood Alert code replaced the older Flood Watch code. This historic dataset therefore contains Flood Watches rather than Flood Alerts prior to this date.
 

Keywords

Keywords

GEMET - INSPIRE themes, version 1.0
Type
Theme

Citation

Date (Publication)
2008-06-01
Code
geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Keywords

NRW Thesaurus
  • floods (flooding)
  • flood risk
  • flood risk management
Type
Theme

Citation

Date (Publication)
2026-03-04
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords

Keywords

IPSV Subjects List
  • Flooding
Type
Theme

Citation

Date (Publication)
2020-11-18
Code
geonetwork.thesaurus.external.theme.subjects

Keywords

NRW SMNR Keywords
  • Hydrological Processes (SMNR)
  • Freshwater and Wetlands (SMNR)
  • Physical Geography (Physiography) (SMNR)
  • Natural Resources (Incl. Features and Processes) (SMNR)
  • Flooding (SMNR)
  • Soil and Land (SMNR)
  • Management Areas (SMNR)
  • Water Quality (SMNR)
  • Ecosystem (SMNR)
  • Sustainable Management of Natural Resources (SMNR)
  • Coastal Margins (SMNR)
  • Water Resources (SMNR)
  • Sea and Coast (SMNR)
Type
Theme

Citation

Date (Publication)
2024-06-26
Code
geonetwork.thesaurus.local.theme.converted_nrw-smnr-keywords
 

Spatial Reference System

Code
British National Grid (EPSG::27700)
 

Content

Content Information

NRW Profile

Custom Elements

 

Constraints

Constraints

Limitations on Public Access and Use

Restriction type
Other restrictions
 

Access Constraints Directive

Limitations
no limitations
 

Access Constraints Text

Other constraints

There are no access restrictions on this data. NRW may release, publish or disseminate it freely.
 

Use Constraints

Use constraints type
Other restrictions
Other constraints

© CNC/NRW. Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and NRW's copyright. It is the recipient's responsibility to ensure the data is fit for the intended purpose.
 

Attribution Statement

Other constraints

Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved.
 

Licence

Other constraints
Open Government Licence
 
 
 

Metadata

Metadata

File Identifier
4f4c4942-4343-5764-6473-313136333432 XML
Metadata Language
English
Resource type
Dataset
Metadata Date
2026-06-29T13:57:21.321Z
Metadata Standard Name
NRW
Metadata Standard Version

1.0

pointOfContact
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
 
 

Publishing Body

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