Flood Alert Info - Rivers Llynfi and Ogmore

Area Description

Rivers in the Llynfi and Ogmore 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 8 May 2021 10:41
South West
The rainfall is forecast to continue throughout Saturday 8th May until midnight. Forecast rainfall quantities give a high risk of flooding of low-lying land during the next 24 hours. Recent dry weather means rivers are reacting slower to the rainfall as river levels were low. Firm ground conditions will increase the risk of surface water run-off.


Flood Alert issued on 19 Feb 2021 10:36
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 28 Jan 2021 03:45
South West
The rainfall is forecast to continue until 5:00 AM on Thursday the 28th 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 20 Jan 2021 19:20
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 15:51
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 16 Jan 2021 03:03
South West
The rainfall is forecast to continue until 08:00 AM on Saturday 16th 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 23 Dec 2020 14:03
South West
The rainfall is forecast to continue until 7:00 PM on Wednesday the 23rd 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 21 Dec 2020 16:38
South West
Heavy rainfall is impacting the area, and further showers are forecast overnight on Monday 21st 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 18:20
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 13 Dec 2020 14:45
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 12:41
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 11:20
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 morning 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 17:41
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 20:16
South West
The rainfall is forecast to continue until 11:30 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 8 Oct 2020 01:00
South West
The rainfall is forecast to continue overnight until 9:00am on Thursday 8 October. Heavy showers are forecast at times. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land overnight and during the next 12 hours.


Flood Alert issued on 3 Oct 2020 16:04
South West
Storm Alex will bring further persistent and heavy rain across the Llynfi and Ogmore catchments, today Saturday 3rd October. The slow moving nature of this rain is expected to give significant rainfall totals which will result in elevated river levels. Further widespread and significant rain is expected overnight and into Sunday morning 4th October. Again this rain will be slow moving, and the risk of flooding will increase and river levels are then expected to reach Alert levels in your area. 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 11:00 AM 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 8 Jul 2020 03:57
South West
The rainfall is forecast to continue until 11:00AM on Wednesday the 8th of July. 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 4 Jul 2020 01:30
South West
The rainfall rate is expected to ease substantially by about 2:00AM on Saturday the 4th of July, but light rain will continue during the day and is not expected to completely clear the area until the early hours of 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 12 hours.


Flood Alert issued on 10 Mar 2020 15:00
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 overnight


Flood Alert issued on 9 Mar 2020 20:00
South West
The rainfall is forecast to continue until 04:00 AM on Tuesday 10th March. The heaviest rainfall is expected to continue until tomorrow. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land on Monday 9th March and during the next 24 hours.


Flood Alert issued on 24 Feb 2020 09:13
South West
The rainfall is forecast to continue until 12:00PM 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 13:38
South West
The rainfall is forecast to continue until 10:00AM on Sunday the 16th of February. The rain is expected to be largely continuous over this period with the potential some high-intensity bursts 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 12 Dec 2019 11:32
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 24 hours.


Flood Alert issued on 6 Dec 2019 05:55
South West
The rainfall is forecast to continue until 07:00 AM on Friday 6th December. The heaviest rainfall has now cleared the area, but further showers are expected during the day. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land on Friday 6th December during the next 12 hours.


Flood Alert issued on 2 Nov 2019 09:28
South West
The rainfall is forecast to continue to ease. The heaviest rainfall (has now cleared the areas. A further band of rain is predicted for this afternoon into the evening, this will be monitored. 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 25 Oct 2019 22:03
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 14:26
South West
The rainfall is forecast to continue as scattered heavy showers until around 01:00 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 11 Oct 2019 14:43
South West
The rainfall is forecast to ease by this evening on Friday 11th October. 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. Motorists are urged to be mindful of surface water.


Flood Alert issued on 30 Sep 2019 19:00
South West
The rainfall is forecast to ease by 10:00 PM on Monday 30th September. Heavy showers are possible 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 28 Sep 2019 19:36
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 24 Sep 2019 08:15
South West
The rainfall is forecast to continue until 09:00 A


Flood Alert issued on 16 Aug 2019 16:24
South West
The rainfall is forecast to ease by 6PM on Friday 16th August, although there is a likelihood of further showers during the course of the evening which may mean river levels will rise and fall in response to those showers. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land overnight tonight Friday 16th August into Saturday morning the 17th August.


Flood Alert issued on 4 Feb 2019 06:35
South West
The rainfall is forecast to continue until 08 AM on Monday 4 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 6 Dec 2018 16:58
South West
A band of heavy rain will pass through the Ogmore catchment between 11:00 PM on Thursday the 6th of December and 07:00 AM on Friday the 7th of December. The River Ogmore is expected to reach the flood alert threshold between 2:00 AM and 3:00 AM between Coytrahen and Bridgend and the river level is forecast to reach its peak level between 7:00 AM and 8:00 AM at Bridgend. 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, overnight, over the weekend.


Flood Alert issued on 5 Dec 2018 12:34
South West
The rainfall is forecast to continue until 3:30 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 Oct 2018 14:08
South West
No additional information available


Flood Alert issued on 12 Oct 2018 12:12
South West
A prolonged period of rainfall is expected from Friday morning 12th September until Sunday 14th September. River levels are expected to rise during Friday 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.


Flood Alert issued on 20 Sep 2018 19:57
South West
Heavy rainfall has affected most of Wales throughout today, Thursday the 20th of September and this will clear 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 evening through to Friday morning. The situation will be monitored and updates will be issued as required. .


Flood Alert issued on 2 May 2018 02:53
South West
The rainfall is forecast to continue until 07 : 00 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 during Wednesday 2nd May for the next 12 hours


Flood Alert issued on 27 Jan 2018 14:01
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 during the next 12 hours.


Flood Alert issued on 21 Jan 2018 14:48
South West
The rainfall is forecast to continue until 5:30 p.m. on Sunday the 21st of January. The level of the River Ogmore at Bridgend is expected to reach the flood alert level by 4:00 p.m. and reach a peak level by 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 10 Dec 2017 08:54
South West
The rainfall is forecast to continue this morning, and occasionally becoming heavy before clearing to showers later. 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, today Sunday 10th December 2017.


Flood Alert issued on 21 Nov 2017 20:15
South West
The rainfall is forecast to continue until approximately 01:00 AM on Wednesday 22nd November. Further rainfall is expected throughout the day on Wednesday giving rise to potential surface water flooding. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land through Tuesday evening and during the next 24 hours. We will update this message should conditions change. .


Flood Alert issued on 20 Nov 2017 20:42
South West
The rainfall is forecast to (continue until 03:00 AM on Tues 21st Nov 2017. Further rainfall is expected during Tuesday and for the remainder of the week. The combination of ground conditions, existing river levels and forecast rainfall quantities gives a high risk of flooding of low-lying land from Mon 20th Nov during the next 12 hours.


Flood Alert issued on 21 Jul 2017 15:10
South West
Heavy rainfall is forecast to continue throughout the afternoon and into the evening on Friday 21st July. 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. Motorists should take particular care when driving during this period of intense rainfall as there are likely to be surface water issues. River levels may rise rapidly in some locations.