4f4c4942-4343-5764-6473-313136333432 English Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en 2026-03-17T15:05:59.808Z NRW 1.0 wel British National Grid (EPSG::27700) Historic Flood Warnings and Flood Alerts Historic Flood Warnings and Flood Alerts Rhybuddion i Fod yn Barod am Lifogydd a Rhybuddion Llifogydd Hanesyddol AfA435 Historic Flood Warnings and Flood Alerts 2026-03-17 NRW_DS116342 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). 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). Aeth rhestri o Rybuddion Llifogydd Difrifol, Rhybuddion Llifogydd (Flood Warnings), Diweddariadau i Rybuddion Llifogydd a Rhybuddion Llifogydd (Flood Alerts) a gyhoeddwyd ers y gwasanaeth Rhybuddion Llifogydd Uniongyrchol, yn fyw ar Ionawr 26, 2006 hyd heddiw. Mae'r set ddata hon yn cynnwys rhybuddion llifogydd a gyhoeddwyd gan Gyfoeth Naturiol Cymru (CNC) ers 1 Ebrill 2013. Mae Rhybuddion Llifogydd (Warnings ac Alerts) yn cael eu cyhoeddi ar gyfer llifogydd o afonydd a'r môr. Mae Rhybuddion Llifogydd (Flood Alerts) yn gyffredinol ar gyfer dalgylchoedd afonydd neu rannau o’r arfordir. Mae Rhybuddion Llifogydd (Flood Warnings) a Rhybuddion Llifogydd Difrifol ar gyfer cymunedau penodol neu rannau o gymunedau. Mae rhybuddion llifogydd (Warnings ac Alerts) i'w gweld yn fyw yma. Cydnabyddiaeth Yn cynnwys gwybodaeth Cyfoeth Naturiol Cymru © Cyfoeth Naturiol Cymru a Chronfa Ddata Hawl. Cedwir pob hawl. Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Natural risk zones Human health and safety GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme flood risk flood risk management floods (flooding) NRW Thesaurus 2026-03-04 geonetwork.thesaurus.local.theme.converted_nrw-keywords Flooding IPSV Subjects List 2020-11-18 geonetwork.thesaurus.external.theme.subjects Hydrological Processes (SMNR) Freshwater and Wetlands (SMNR) Natural Resources (Incl. Features and Processes) (SMNR) Flooding (SMNR) Soil and Land (SMNR) Water Quality (SMNR) Physical Geography (Physiography) (SMNR) Ecosystem (SMNR) Coastal Margins (SMNR) Management Areas (SMNR) Sea and Coast (SMNR) Water Resources (SMNR) Sustainable Management of Natural Resources (SMNR) NRW SMNR Keywords 2024-06-26 geonetwork.thesaurus.local.theme.converted_nrw-smnr-keywords There are no access restrictions on this data. NRW may release, publish or disseminate it freely. no limitations © 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. Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved. Open Government Licence English health SeaVoX Vertical Co-ordinate Coverages 2021-01-06 Wales (WLS) -5.777741 -2.608865 51.240829 53.513067 2006-02-15 2026-03-13 Live flood warnings in force are available on the NRW website https://flood-warning.naturalresources.wales/ Delimited Unknown Excel Spreadsheets https://datamap.gov.wales/documents/2644 WWW:LINK-1.0-http--link Download Data and Web Service 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 2010-12-08 This dataset has not been assessed for conformance to the referenced INSPIRE regulation. false 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. 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.