Flood Alert Info - Rivers Loughor and Amman

Area Description

Rivers in the Loughor and Amman catchments.
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

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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 24 Feb 2021 02:02
South West
The rainfall is forecast to gradually ease by mid-morning today Wednesday 24th February 2021, but will return again 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 24 hours.


Flood Alert issued on 19 Feb 2021 09:49
South West
The rainfall is forecast to continue through today Friday 19th February and most of Saturday 20th February and the prolonged nature raises the risk of significant impacts. The combination of ground conditions, existing river levels and exceptional rainfall quantities gives a high risk of flooding of low-lying land during the next 24 hours and over the weekend. Many rivers are already at elevated levels from rainfall earlier this week and will react to the quantities forecast.


Flood Alert issued on 14 Feb 2021 18:01
South West
The rainfall is forecast to continue until 07:00 PM on Sunday 14th February. 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 20 Jan 2021 19:07
South West
Remaining very unsettled this evening, Wednesday 20th January, as Storm Christoph brings further heavy rain over the next few hours. This will increase river levels further. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land until Thursday 21st January.


Flood Alert issued on 19 Jan 2021 15:40
South West
Remaining very unsettled today Tuesday 19th January, as Storm Christoph brings further heavy rain this afternoon and especially overnight into Wednesday. Rain will continue throughout Wednesday, increasing river levels further. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land until Thursday 21st January.


Flood Alert issued on 27 Dec 2020 01:15
South West
The rainfall is forecast to continue until 2:00 AM on Sunday the 27th 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 17 Dec 2020 18:21
South West
River levels are already high in this area and in many places ground conditions are saturated. Further rainfall is expected to arrive in the catchment tonight on Thursday 17th December and will continue until the early hours on Friday 18th December. A further band of heavy rain will arrive Friday morning and continue overnight to Saturday 19th December. This rainfall is expected to be very intense at times and there is a very high risk of flooding during Friday. Further bands of rainfall are expected during Sunday and into Monday and as a result the risk of flooding is likely to continue over the weekend into early next week. You can monitor the situation in this area by using our River Levels Online Service on our website. We will continue to monitor the situation closely and will update this message as the situation changes.


Flood Alert issued on 15 Dec 2020 15:32
South West
Although river levels have dropped during Tuesday 15th December, further heavy rainfall forecast overnight will likely reach flood alert level once more. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land over the next 24 hours


Flood Alert issued on 15 Dec 2020 04:46
South West
Heavy showers are over the area this morning, but will gradually become less frequent. 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 2020 12:27
South West
The rainfall is forecast to continue until 4 pm today Sunday 13 December 2020, and will often be heavy and persistent. Remaining unsettled overnight with further heavy showers. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land both today Sunday 13th December and overnight into Monday.


Flood Alert issued on 1 Nov 2020 12:42
South West
The weather remains very unsettled, and there is a continuing risk of flooding with saturated ground conditions. Further rainfall is expected today Sunday 1st November, accompanied by severe gale force southwesterly winds. The heaviest and most persistent rainfall will be inland over high ground tonight. This will clear to showery weather during the early hours of Monday 2nd November. You can monitor the situation in this area by using our River Levels Online Service on our website. We will continue to monitor the situation closely and will update this message as the situation changes.


Flood Alert issued on 31 Oct 2020 14:22
South West
River levels are already high in this area and in many places ground conditions are saturated. Further rainfall is expected to arrive in the catchment tonight on Saturday 31st October and will continue through the night to Sunday evening the 1st November. This rainfall is expected to be intense at times and there is a high risk of flooding during Sunday. Further bands of rainfall are expected during Sunday and into Monday and as a result the risk of flooding is likely to continue over the weekend into early next week. You can monitor the situation in this area by using our River Levels Online Service on our website. We will continue to monitor the situation closely and will update this message as the situation changes.


Flood Alert issued on 30 Oct 2020 17:33
South West
River levels are already high in this area and in many places ground conditions are saturated. Further rainfall is expected to arrive in the catchment tonight on Friday 30th October and will continue through the night to Saturday morning the 31st October. This rainfall is expected to be very intense at times and there is a very high risk of flooding during Saturday. Further bands of rainfall are expected during Sunday and into Monday and as a result the risk of flooding is likely to continue over the weekend into early next week. You can monitor the situation in this area by using our River Levels Online Service on our website. We will continue to monitor the situation closely and will update this message as the situation changes.


Flood Alert issued on 29 Oct 2020 20:14
South West
The rainfall is forecast to continue until 11:00 am on Friday the 30th of October. The heaviest rainfall is expected overnight through into Friday 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 3 Oct 2020 17:03
South West
Storm Alex will bring further rainfall across the Loughor and Amman catchments during today, Saturday 3rd October. Further widespread and significant rain is expected overnight and into Sunday morning 4th October. The slow-moving nature of this rain is expected to give significant rainfall totals which will result in elevated river levels. Natural Resources Wales officers will monitor the river levels overnight and during Sunday 4th October, providing updates as needed. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land overnight, and especially Sunday 4th October.


Flood Alert issued on 25 Aug 2020 06:10
South West
The rainfall is forecast to ease by 10:00AM on Tuesday the 25th August. 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 17 Aug 2020 15:06
South West
The rainfall is forecast to continue for the next 12 hours, with isolated heavy showers throughout the catchment. 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 28 Feb 2020 12:16
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 28 Feb 2020 11:28
South West
No additional information available


Flood Alert issued on 24 Feb 2020 08:26
South West
The rainfall is forecast to continue until 11:00AM on Monday 24th February. The heaviest rainfall is expected to continue for the next few hours. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land on Monday 24th February during the next 12 hours. Land is already saturated following recent flood events and surface water flooding is also possible.


Flood Alert issued on 22 Feb 2020 17:45
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 15 Feb 2020 14:33
South West
The rainfall is forecast to continue until 9:00AM on Sunday the 16th of February. The rain is expected to fall continuously over this period with the possibility of some high intensity burst during Saturday evening and into Sunday 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 13 Feb 2020 03:07
South West
The rainfall is forecast to continue until 3:30AM on Thursday the 13th of 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 9 Feb 2020 03:07
South West
The rainfall is forecast to continue until 1:00PM on Sunday 9th February. The heaviest rainfall has now cleared the areas, but further spells of heavy rain are expected. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land on Sunday 9th February during the next 24 hours.


Flood Alert issued on 14 Jan 2020 13:23
South West
The heaviest showers will continue through the 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 24 hours.


Flood Alert issued on 11 Jan 2020 21:23
South West
The rainfall is forecast to continue until 01:00 AM on Sunday 11th January. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land overnight and into early hours of Sunday Morning.


Flood Alert issued on 9 Jan 2020 01:48
South West
The rainfall is forecast to continue overnight, some of which will be heavy and should ease off by early hours on the 9th 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 14:11
South West
The rainfall is forecast to continue until 05:00 PM on Thursday 19th December 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 during the next 12 hours, on Thursday 19th December.


Flood Alert issued on 18 Dec 2019 19:51
South West
The rainfall is forecast to continue to ease. 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 this evening, Wednesday 18th December 2019.


Flood Alert issued on 12 Dec 2019 10:00
South West
The rainfall is forecast to continue until 01:00 pm today 12th December 2019. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land today 12th December 2019 and during the next 12 hours.


Flood Alert issued on 10 Dec 2019 16:51
South West
The rainfall is forecast to continue until 8:00 PM on Tuesday 10th December. The rainfall is expected to continue along with the current windy conditions. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land on Tuesday 10th December overnight.


Flood Alert issued on 25 Oct 2019 17:02
South West
The rainfall is forecast to continue until late morning on Saturday 26th October. Rainfall will be heavy at times and river levels will rise this evening and 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. Surface water will hamper driving conditions.


Flood Alert issued on 18 Oct 2019 15:03
South West
The rainfall is forecast to continue as scattered heavy showers up to around 01:00 am on Saturday the 19th of October. Through Saturday morning there will be further showery conditions before some drier weather for the remainder of the weekend. 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 17 Oct 2019 22:38
South West
The rainfall is forecast to continue until 02 :00 AM on Friday 18th October. The heaviest rainfall has now cleared the area but showers will continue through the night and tomorrow. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land on Thursday 17th and Friday 18th October.


Flood Alert issued on 28 Sep 2019 19:28
South West
The rainfall is forecast to continue until 01:00AM on Sunday 29th September 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 and tomorrow morning, Sunday 29th September 2019.


Flood Alert issued on 16 Aug 2019 16:07
South West
The rainfall is forecast to ease by 06:00 PM on Friday 16th August 2019. 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 during the next 12 hours.


Flood Alert issued on 16 Mar 2019 16:21
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 08:19
South West
The rainfall is forecast to continue until 1 PM on Tuesday 12th March. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flood during the next 12 hours.


Flood Alert issued on 8 Feb 2019 10:34
South West
The rainfall is forecast to continue until 1 :00 PM on Friday the 8th of 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 12:38
South West
The rainfall is forecast to continue until 3:00 PM on Tuesday 18th 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 12 hours.


Flood Alert issued on 6 Dec 2018 17:42
South West
A band of heavy rain will pass through the Loughor and Amman catchments between 1 AM and 6:00 AM on Friday the 7th of December. The main watercourses are expected to exceed the flood alert threshold during this period but there is considerable uncertainty over the timing of the flood peak. 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 5 Dec 2018 12:04
South West
The rainfall is forecast to continue until 2:30 PM on Wednesday 5th December. The heaviest rainfall is expected to continue for remainder of this morning. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land on Wednesday 5th December during the next 24 hours.


Flood Alert issued on 12 Nov 2018 14:26
South West
Scattered heavy and potentially thundery downpours are expected to continue to move across the catchment on strong south-westerly winds this afternoon and evening, Monday 12th November 2018. 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 9 Nov 2018 19:24
South West
The heavy rainfall is forecast to continue until 08 :00 PM on Friday 9th November 2018. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land today Friday 9th November 2018 and over the weekend.


Flood Alert issued on 7 Nov 2018 06:26
South West
The rainfall is forecast to continue until 9am on 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 12 hours.


Flood Alert issued on 11 Oct 2018 18:09
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 17:39
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 14:02
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 2 May 2018 04:12
South West
The rainfall is forecast to continue until 07 : 30 AM on Wednesday 2nd May. 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 on Wednesday 2nd May during the next 12 hours.


Flood Alert issued on 2 Apr 2018 05:54
South West
The rainfall is forecast to continue until 09:00 AM on Monday 2nd April, with further heavy showers expected through the day on Monday. 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 on Monday 2nd April. .


Flood Alert issued on 21 Jan 2018 13:52
South West
The rainfall is forecast to continue until 5:30 p.m. on Sunday the 21st 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 15 Jan 2018 10:06
South West
The rainfall is forecast to ease by 11 :00 AM on Monday 15th Jan. 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 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 06:09
South West
The rainfall is forecast to ease by 8 AM Thursday 7th December 2017. Further heavy rainfall is expected at times until then. 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 24 Oct 2017 19:43
South West
The rainfall is forecast to continue until 04:00 AM on Wednesday 25th October. 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 5 Jun 2017 20:07
South West
The rainfall is forecast to continue overnight to Tuesday 6th June 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 during the next 12 hours