Flood Alert Info - Upper Tawe

Area Description

Rivers in the Tawe catchment north of the M4 motorway including the Twrch.

This is a Flood Alert Area. For this area the highest level of flood notification that you will receive is a Flood Alert. No Flood Warnings or Severe Flood Warnings are issued for this area.
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Flood Alert Currently in Force

There are no Flood Alerts currently in force for this area. See below for historical flood warnings.

Area Covered by this Flood Alert

The orange highlighted area on the map below outlines the area covered by this Flood Alert.
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Flood Alert History

Number of historic Flood Alerts that have previously been recorded for this area:
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Historical Flood Alert Messages for this Area


Flood Alert issued on 6 Dec 2018 16:00
South West
Light rain will continue to fall for the remainder of this afternoon and into the evening. A more intense band of rain will arrive at midnight on Thursday the 6th of December and rainfall is expected to continue until 6:00 AM on Friday the 7th of December. Current forecasts for the upper Tawe catchment indicate that alert levels will be exceeded at a number of locations and river levels are expected to peak between 6:30 AM and 7:30 AM on Friday the 7th of December. There is still some uncertainty about the rainfall distribution over this period and therefore the timing and magnitude of flood peaks may change during the intervening period. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land during the next 24 hours.


Flood Alert issued on 11 Oct 2018 18:10
South West
A prolonged period of rainfall is expected from the early hours of Friday morning 12th October until Sunday 14th October. River levels are expected to rise during Friday morning and will remain high over the weekend giving a high risk of flooding to low-lying land and roads. You can monitor the situation using our river levels online service on the Natural Resources Wales website. We will update this message tomorrow as confidence in the forecast improves.


Flood Alert issued on 11 Oct 2018 17:43
South West
A prolonged period of rainfall is expected from the early hours of Friday morning 12th September until Sunday 14th September. River levels are expected to rise during Friday morning and will remain high over the weekend giving a high risk of flooding to low-lying land and roads. You can monitor the situation using our river levels online service on the Natural Resources Wales website. We will update this message tomorrow as confidence in the forecast improves.


Flood Alert issued on 20 Sep 2018 14:08
South West
Heavy rainfall is forecast to affect most of Wales throughout today, Thursday the 20th of September, clearing to more scattered showers overnight. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land from Thursday afternoon through to Friday morning.


Flood Alert issued on 21 Jan 2018 15:28
South West
The rainfall is forecast to continue until 5:30 p.m. on Sunday the 21st of January. The forecasts indicate that the level of the River Tawe between Craig-Y-Nos and Ystradgynlais is expected is to peak between 4:45 p.m. and 5:15 p.m. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land during the next 12 hours.


Flood Alert issued on 2 Jan 2018 21:21
South West
The rainfall is forecast to ease by 11:00PM on Tuesday 2nd Jan, although further heavy showers are forecast overnight. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land overnight.


Flood Alert issued on 7 Dec 2017 07:29
South West
The rainfall is forecast to the clear away soon this morning Thursday 7th December 2017, however river levels are still rising. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land this morning


Flood Alert issued on 23 Nov 2017 01:31
South West
The rainfall is forecast to ease by 02:00 AM on Thursday 23rd November. The heaviest rainfall has now cleared the area. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low lying land during the next 12 hours.


Flood Alert issued on 6 Jun 2017 02:21
South West
The rainfall is forecast to continue throughout the night with heavy showers at times. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land until mid morning