Flood Alert Info - Upper Towy

Area Description

Rivers in the upper Towy catchment upstream of Llandeilo excluding the Bran at Llandovery.
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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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

  • We have only been collating detailed flood messages since May 2017.
  • Each Flood Alert may have multiple updates. The messages listed below may therefore be greater than the number of alerts detailed in the Flood Alert table above.

Flood Alert issued on 25 Aug 2020 06:17
South West
The arrival of Storm Francis has brought widespread rainfall to the catchment overnight. The heaviest rainfall is forecast to clear the area by approximately 08:30 AM on Tuesday 25th August, leaving only lighter isolated showers for the remainder of the morning. 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 15 Mar 2020 03:24
South West
The rainfall is forecast to continue until approximately 8:00 AM on Sunday 15th March. 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. River levels in some parts of this catchment are expected to remain high into this afternoon. Impacts are generally only expected to be minor, we will continue to monitor the situation and will update this message if the situation changes.


Flood Alert issued on 9 Mar 2020 20:26
South West
The current band of rain is expected to ease by about 9:15 PM on Monday the 9th of March. A second band of rain will commence at about 1:00 AM on Tuesday the 10th of March and continue until about midday. The River Tywi, between Ystradffin and Manorafon, is expected to reach a peak level between 10:30PM and 11:30PM on Monday the 9th of March. A second, larger peak, is forecast to occur at bout 9:00AM on Tuesday the 10th of March. 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 29 Feb 2020 13:45
South West
The heavy rainfall associated with Storm Jorge has now cleared the areas. 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. This message will be updated as the situation changes.


Flood Alert issued on 28 Feb 2020 12:11
South West
Heavy rainfall associated with Storm Jorge is impacting the area. The rainfall is forecast to continue overnight until 5am on Saturday 29th February. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land over the weekend.


Flood Alert issued on 23 Feb 2020 19:05
South West
Further rainfall is forecast through Sunday night and into Monday morning. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land on Monday morning. Land is already saturated following recent flood events and surface water flooding is also possible.


Flood Alert issued on 22 Feb 2020 18:55
South West
This Flood Alert is issued in advance of the rainfall forecast to arrive overnight Saturday 22nd February into Sunday 23rd February. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land over the weekend. Land is already saturated following recent flood events and surface water flooding is also possible.


Flood Alert issued on 16 Feb 2020 19:10
South West
The heaviest rainfall has now cleared the area, but further showers are expected overnight into Monday 17th February. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land overnight, over the weekend.


Flood Alert issued on 15 Feb 2020 12:17
South West
The rainfall is forecast to continue until 09:30AM on Sunday the 16th of February. Rain is expected to be largely continuous over this period with some higher intensity bursts expected during Saturday evening and overnight into Sunday. 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 9 Feb 2020 07:04
South West
The rainfall is forecast to 1pm on Sunday 9th February. Heavy showers are expected to continue as Storm Ciara takes hold. 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 14 Jan 2020 14:45
South West
The rainfall is forecast to continue until 4:30 PM on Tuesday the 14th of January. Isolated heavy showers may persist into the evening. The level of the River Tywi, upstream of Llandovery, is expected to reach the flood alert threshold by 4:00 PM on Tuesday the 14th of January. 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 11 Jan 2020 21:40
South West
The rainfall is forecast to continue until 1:00 AM on Sunday the 12th of January. The River Tywi, upstream of Llandovery, is expected to exceed the flood alert threshold by about 11:00 PM on Saturday the 11th of January and reach a peak level by 2:00 AM on Sunday the 12th of January. 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 19 Dec 2019 15:57
South West
The level of the River Tywi between Llyn Brianne and Manorafon has fallen below the flood alert threshold but additional rainfall, arriving during Thursday afternoon and evening is expected to raise the level above this threshold between 6:00PM and 8:00PM on Thursday the 19th of December. 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 19 Dec 2019 14:45
South West
The River Towy, between Llandeilo and Abergwili, is expected to remain above the flood alert threshold until about 02:00AM on Friday the 20th of December. The band of rain passing across the area during Thursday evening may further increase the river level, but this is not expected to rise significantly over this 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 19 Dec 2019 06:56
South West
The heaviest rainfall has now cleared the area, but a second band of rain is expected to arrive at 2:00PM on Thursday the 19th of December and this will bring additional rainfall until about 8:00PM. The River Towy, between Llyn Brianne and Manorafon is expected to reach a peak level between 7:30AM and 9:30AM. 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 12 Dec 2019 22:39
South West
Heavy showers are forecast to ease by midnight on Thursday 12th December. 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 11 Dec 2019 13:27
South West
The heaviest rainfall has now cleared the area but further showers are expected overnight on Wednesday 11th December, and during the day on Thursday 12th December. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land overnight into Thursday 12th December.


Flood Alert issued on 10 Dec 2019 17:26
South West
The rainfall is forecast to continue until this evening on Tuesday 10th and then ease. . 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 12 Nov 2019 14:23
South West
The rainfall is forecast to continue until 07:00 PM on Tuesday 12th November 2019. The heaviest rainfall is expected to continue. 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 2 Nov 2019 17:57
South West
The rainfall is forecast to continue until 03:00 AM on Sunday 3rd November. The heaviest rainfall is expected to continue for several hours. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land on Saturday 2nd November evening and into Sunday 3rd November during the next 24 hours.


Flood Alert issued on 26 Oct 2019 20:46
South West
The heaviest rainfall has now cleared the areas. The combination of ground conditions and existing river levels gives a high risk of flooding of low-lying land overnight.


Flood Alert issued on 25 Oct 2019 16:26
South West
The current period of rainfall is forecast to persist until late morning on Saturday the 26th of October, rainfall will become heavy at times. River levels in this area will rise this afternoon and will become high this evening and will remain high through Saturday. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land over the weekend. We will continue to monitor the situation and we will update this message if the situation changes.


Flood Alert issued on 12 Oct 2019 21:38
South West
A band of persistent rainfall, heavy at times is forecast overnight on Sunday the 13th October. River levels are expected to rise during the early morning and stay high into the afternoon. Only relatively minor impacts are currently expected. 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. We will monitor the situation and update this message if the situation changes.


Flood Alert issued on 11 Oct 2019 13:41
South West
The heaviest rainfall has cleared the area, river levels in the Upper Towy will continue to rise for a short period and then will remain high into this evening. Only very minor impacts are expected. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a small risk of flooding of low-lying land during the next 12 hours. We will update this message if the situation changes.


Flood Alert issued on 28 Sep 2019 19:14
South West
The rainfall is forecast to ease by 02:00 AM on Sunday 29th September, although there may be some very heavy isolated downpours during the course of the remainder of the night. 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 16 Aug 2019 20:33
South West
The rainfall is forecast to continue to ease. The heaviest rainfall has now cleared the areas. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land on Friday 16th August overnight.


Flood Alert issued on 16 Mar 2019 17:17
South West
The rainfall is forecast to continue until 08:00 PM today 16/03/2019. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land today 16/03/2019 and over the weekend.


Flood Alert issued on 12 Mar 2019 18:06
South West
The heaviest rainfall has now cleared the area. There will be some light rain between 8:30 PM on Tuesday the 12th of March and 5:00 AM on Wednesday the 13th of March but the quantities are no expected to have a significant impact on river levels. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land overnight. The level of the River Tywi between Ystradffin and Manorafon is expected to remain above the alert threshold until about 11:00 PM on Tuesday the 12th of March but this period may extend into the early hours of Wednesday the 13th of March.


Flood Alert issued on 12 Mar 2019 00:21
South West
The rainfall is forecast to continue until 1:30 PM on Tuesday the 12th of March. 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 8 Feb 2019 10:47
South West
The rainfall is forecast to ease by 12:30 PM on Friday 8th February. 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 18 Dec 2018 14:54
South West
The heaviest rainfall is now clearing the area, but river levels will continue to rise until early to mid-evening. The rainfall is forecast to slowly clear today Tuesday 18th of December 2018 around 7pm. Showers will remain overnight. 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 7 Dec 2018 15:51
South West
Following the heavy rain early on Friday 7th December river levels in the Upper Towy catchment remain high even though the river has peaked and is gradually receding. The combination of ground conditions, existing river levels and some forecast rainfall maintains the risk of flooding of low-lying land during the next 24 hours. You can monitor the situation in your area by using our River Levels Online Service on our website.


Flood Alert issued on 6 Dec 2018 16:25
South West
Heavy rainfall is forecast in the early hours of the morning, Friday 7th December 2018. River levels are expected to peak around 7:30 AM. At this point there are uncertainties regarding the rainfall quantities, confidence for this flood alert are low. 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 29 Nov 2018 09:02
South West
The rainfall is forecast to ease by 01:00 PM today 29th November 2018. However, heavy isolated showers are forecast to continue throughout the day. The combination of ground conditions, existing river levels and forecast rainfall quantities give a high risk of flooding of low-lying land today 29th November 2018 and during the next 24 hours.


Flood Alert issued on 11 Nov 2018 11:10
South West
The heaviest rainfall has cleared the area, however isolated showers are forecast throughout Sunday and overnight into Monday. River levels in the Upper Towy have responded to last night’s rainfall but the situation is improving, and risk of flooding is continually reducing. We will continue to monitor conditions and will update this message as the situation changes.


Flood Alert issued on 10 Nov 2018 12:21
South West
The heaviest rainfall has cleared the area. Isolated showers are expected over the remainder of the weekend. River levels in the upper Towy catchment remain elevated but are receding and are expected to continue to recede. The situation is improving, and risk of flooding is continually reducing. We are continuing to monitor conditions and we will update this message if the situation changes.


Flood Alert issued on 9 Nov 2018 15:41
South West
The current forecasts indicate that the River Tywi between Rhandirmwyn and Llandeilo will exceed the flood alert level between 8:00PM and 11:00 PM on Friday the 9th of November. The rainfall is forecast to continue until 9:00PM on Friday the 9th of November. 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 6 Nov 2018 16:27
South West
The rainfall is forecast to continue overnight on Tuesday 6th November and into the morning of Wednesday 7th November. 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 14 Oct 2018 15:09
South West
The heaviest of the rainfall has passed through South West Wales area. River levels will remain high over the next few days giving a high risk of flooding to low-lying land and roads. Some surface water issues may remain. You can monitor the situation using our river levels online service on the Natural Resources Wales website. We will update this message if there is any change to the situation.


Flood Alert issued on 11 Oct 2018 18:15
South West
A prolonged period of rainfall is expected from the early hours of Friday morning 12th of October, until the Sunday the 14th of 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 17:37
South West
A prolonged period of rainfall is expected from the early hours of Friday morning 12th of September, until the Sunday the 14th of 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 21 Sep 2018 11:51
South West
River levels are expected to remain high throughout the day. The heaviest rainfall has now cleared the areas. The combination of ground conditions and existing river levels gives a high risk of flooding of low-lying land throughout today, Friday the 21st of September.


Flood Alert issued on 20 Sep 2018 12:07
South West
A widespread area of rain is currently affecting the area. The rainfall is forecast to be prolonged through today, Thursday the 20th of September. Heavy rain is expected at times later. This rain is forecast to become more broken this evening, with the prolonged rainfall eventually clearing to leave more scattered showers during the early hours of Friday morning. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land this from Thursday afternoon through to Friday morning.


Flood Alert issued on 2 Apr 2018 17:55
South West
Further heavy showers are expected this evening. 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 22 Jan 2018 10:12
South West
Following the heavy and prolonged rainfall yesterday on Sunday the 21st January, river levels in the lower reaches of the Towy are high. River levels have peaked and the water levels are beginning to recede, this flood alert is likely to remain in force until later this afternoon on Monday 22nd January.


Flood Alert issued on 21 Jan 2018 12:43
South West
The rainfall is forecast until 4:00 PM today, 21st of January. The heaviest rainfall is expected to continue. 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 23:15
South West
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 13 Dec 2017 14:41
South West
The rainfall is forecast to continue until 08:00 PM on 13th December 2017. The heaviest rainfall is expected to continue until this time. The combination of ground conditions, melting snow, 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 27 Nov 2017 04:01
South West
The rainfall is forecast to continue until 04:30 AM on 27th November 2017. 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 22 Nov 2017 19:02
South West
The rainfall is forecast to continue until around midnight today, Wednesday 22nd of November. Bands of heavy showers are expected which will affect river levels in 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. The upper reaches of the River Towy and smaller watercourses in the area may be affected as river levels react to these showers .


Flood Alert issued on 22 Oct 2017 01:01
South West
The rainfall is forecast to continue overnight, and occasionally heavy at times. 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 15 Sep 2017 08:10
South West
The rainfall is forecast to continue until 6:00 PM on Friday the 15th of September. 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. Sporadic outbreaks of heavy rain will continue to occur throughout the day along a northerly airflow. Isolated bursts of intense rainfall are expected but these showers are not expected to form into more organised bands of rain.


Flood Alert issued on 6 Jun 2017 01:17
South West
The rainfall is generally easing; however, further heavy showers are expected into the early hours of Tuesday morning. 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. River Levels are expected to rise slowly through the night, and impacts are expected to be relatively minor. We will update this messages as the situation changes.