Flood Alert Info - Glaslyn and Dwyryd Catchment
Area Description
Areas around the river Glaslyn and river Dwyryd, from Dyffryn Ardudwy to Nant Gwynant.
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:
We can provide a Flood Insurance Quote for properties in the Porthmadog area
Historical Flood Alerts for this Area
Flood Alert issued on 23 Feb 2025 14:07
North
Flooding of low-lying land and roads is expected. Rainfall is currently affecting this area. River Levels are above normal levels. We will continue to monitor the situation.
Flood Alert issued on 31 Dec 2024 16:48
North
Flooding of low-lying land and roads is expected. Rainfall is currently affecting this area. River Levels will be above normal levels.
Flood Alert issued on 18 Dec 2024 08:03
North
Flooding of low-lying land and roads is expected. Rainfall is currently affecting this area. We will continue to monitor the situation.
Flood Alert issued on 7 Dec 2024 02:47
North
Flooding of low-lying land and roads is expected. Rainfall is currently affecting this area. River Levels will be above normal levels. We will continue to monitor the situation.
Flood Alert issued on 4 Dec 2024 22:33
North
Flooding of low-lying land and roads is expected. Rainfall is currently affecting this area. River Levels are above normal levels. We will continue to monitor the situation.
Flood Alert issued on 23 Nov 2024 08:34
North
Flooding of low-lying land and roads is expected. Rainfall is currently affecting this area. River Levels will be above normal levels. We will continue to monitor the situation.
Flood Alert issued on 2 Sep 2024 06:00
North
Flooding of low-lying land and roads is expected. Rainfall is currently affecting this area. River Levels are above normal levels. We will continue to monitor the situation.
Flood Alert issued on 23 Aug 2024 01:27
North
Rainfall is currently affecting this area. River Levels are above normal levels. We will continue to monitor the situation.
Flood Alert issued on 22 Aug 2024 07:35
North
Rainfall is currently affecting this area. River Levels are above normal levels. We will continue to monitor the situation.
Flood Alert issued on 23 May 2024 02:07
North
River levels are expected to be above normal.
Flooding of Low-lying land and roads is expected.
We will continue to monitor the situation.
You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website.
For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 9 Apr 2024 04:58
North
River levels are expected to be above normal. Flooding of Low-lying land and roads is expected. . We will continue to monitor the situation. You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website. For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website
Flood Alert issued on 17 Mar 2024 01:45
North
A period of adverse weather is affecting this region. River levels are expected to be above normal. Flooding of Low-lying land and roads is expected.
We will continue to monitor the situation. You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website.
For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page
on our website.
Flood Alert issued on 13 Mar 2024 10:36
North
A period of adverse weather is affecting this region. River levels are expected to be above normal. Flooding of Low-lying land and roads is expected. We will
continue to monitor the situation. You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website. For more
information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 28 Feb 2024 22:08
North
River levels are expected to be above normal. Flooding of Low-lying land and roads is expected. . We will continue to monitor the situation. You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website. For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 20 Feb 2024 16:20
North
River levels are expected to be above normal. Flooding of Low-lying land and roads is expected. . We will continue to monitor the situation.
You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website.
For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 17 Feb 2024 17:08
North
River levels are expected to be above normal. Flooding of Low-lying land and roads is expected. We will continue to monitor the situation.
You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website.
For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 29 Jan 2024 12:42
North
A period of adverse weather is affecting this region.
River levels are expected to be above normal.
Flooding of Low-lying land and roads is expected.
We will continue to monitor the situation.
You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website.
For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 25 Jan 2024 22:06
North
A period of adverse weather is affecting this region.
River levels are expected to be above normal.
Flooding of Low-lying land and roads is expected.
We will continue to monitor the situation.
You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website.
For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 23 Jan 2024 11:42
North
Storm Jocelyn is affecting this region. Flooding of Low-lying land and roads is expected. . We will continue to monitor the situation. You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website. For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 21 Jan 2024 16:08
North
Storm Isha is affecting this region. River levels are expected to be above normal. Flooding of Low-lying land and roads is expected. . We will continue to monitor the situation. You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website. For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website
Flood Alert issued on 21 Jan 2024 00:57
North
A period of adverse weather is affecting this region. River levels are expected to be above normal. Flooding of Low-lying land and roads is expected. We will continue to monitor the situation. You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website. For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 1 Jan 2024 21:18
North
A period of adverse weather is affecting this region.
River levels are expected to be above normal.
Flooding of Low-lying land and roads is expected.
We will continue to monitor the situation.
You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website.
For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 27 Dec 2023 10:48
North
River levels are expected to be above normal. Flooding of Low-lying land and roads is expected. We will continue to monitor the situation. You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website. For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 18 Dec 2023 11:36
North
A period of adverse weather is affecting this region. River levels are expected to be above normal. Flooding of Low-lying land and roads is expected. . We will continue to monitor the situation. You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website. For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 9 Dec 2023 09:05
North
River levels are expected to be above normal. Flooding of Low-lying land and roads is expected. We will continue to monitor the situation. You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website. For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 19 Nov 2023 11:13
North
River levels are expected to be above normal.
Flooding of Low-lying land and roads is expected.
We will continue to monitor the situation.
You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website.
For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 5 Oct 2023 20:07
North
A period of adverse weather is affecting this region. River levels are expected to be above normal. Flooding of Low-lying land and roads is expected.
We will continue to monitor the situation. You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website.
For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page
on our website.
Flood Alert issued on 1 Oct 2023 04:10
North
A period of adverse weather is affecting this region. River levels are expected to be above normal. Flooding of Low-lying land and roads is expected. . We will continue to monitor the situation. You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website. For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 24 Sep 2023 11:21
North
A period of adverse weather is affecting this region. River levels are expected to be above normal. Flooding of Low-lying land and roads is expected. We will continue to monitor the situation. You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website. For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 19 Sep 2023 05:28
North
River levels are expected to be above normal. Flooding of Low-lying land and roads is expected. We will continue to monitor the situation. You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website. For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 27 Jul 2023 00:15
North
River levels are expected to be above normal. Flooding of Low-lying land and roads is expected. We will continue to monitor the situation. You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website. For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 22 Jul 2023 09:40
North
A period of adverse weather is affecting this region. River levels are expected to be above normal. Flooding of Low-lying land and roads is expected. We will continue to monitor the situation. You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website. For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 16 Jul 2023 03:08
North
A period of adverse weather is affecting this region. River levels are expected to be above normal. Flooding of Low-lying land and roads is expected. We will continue to monitor the situation. You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website. For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 21 Mar 2023 22:58
North
A period of adverse weather is affecting this region. River levels are expected to be above normal. Flooding of Low-lying land and roads is expected. . We will continue to monitor the situation. You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website. For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 16 Mar 2023 01:35
North
A period of adverse weather is affecting this region. River levels are expected to be above normal. Flooding of Low-lying land and roads is expected. . We will continue to monitor the situation. You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website. For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website
Flood Alert issued on 12 Mar 2023 23:12
North
A period of adverse weather is affecting this region.
River levels are expected to be above normal.
Flooding of Low-lying land and roads is expected.
We will continue to monitor the situation.
You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website.
For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 14 Jan 2023 03:04
North
A period of adverse weather is affecting this region.
River levels are expected to be above normal.
Flooding of Low-lying land and roads is expected.
We will continue to monitor the situation.
You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website.
For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 10 Jan 2023 09:47
North
River levels are expected to be above normal. Flooding of Low-lying land and roads is expected. We will continue to monitor the situation. You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website. For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 3 Jan 2023 17:21
North
River levels are expected to be above normal. Flooding of Low-lying land and roads is expected. . We will continue to monitor the situation. You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website. For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 31 Dec 2022 17:02
North
River levels are expected to be above normal. Flooding of Low-lying land and roads is expected. . We will continue to monitor the situation. You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website. For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 29 Dec 2022 15:49
North
River levels are expected to be above normal. Flooding of Low-lying land and roads is expected. . We will continue to monitor the situation. You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website. For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 28 Dec 2022 09:24
North
River levels are expected to be above normal. Flooding of Low-lying land and roads is expected. . We will continue to monitor the situation. You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website. For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website
Flood Alert issued on 27 Dec 2022 15:27
North
River levels are expected to be above normal.
Flooding of Low-lying land and roads is expected. We will continue to monitor the situation.
You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website.
For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 19 Dec 2022 01:51
North
River levels are expected to be above normal. Flooding of Low-lying land and roads is expected. We will continue to monitor the situation. You can monitor the
situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website. For more information on our Flood Alerts and how we issue them, please
visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 4 Oct 2022 14:43
North
A period of adverse weather is affecting this region. River levels are expected to be above normal. Flooding of Low-lying land and roads is expected. We will
continue to monitor the situation. You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website. For more
information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 30 Sep 2022 13:55
North
A period of adverse weather is affecting this region. River levels are expected to be above normal. Flooding of Low-lying lands and roads is expected. We will
continue to monitor the situation. You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website. For more
information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 2 Aug 2022 07:01
North
River levels are expected to be above normal. Flooding of low-lying land and roads is expected. We will continue to monitor the situation. You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website. For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 2 Jul 2022 03:43
North
A period of adverse weather is affecting this region. River levels are expected to be above normal. Flooding of low-lying lands and roads is expected. We will continue to monitor the situation. You can monitor the situation in your area by using our 'River Levels, Rainfall and Sea Data' on our website. For more information on our Flood Alerts and how we issue them, please visit the ‘How we forecast floods, issue warnings and assess flood risk’ page on our website.
Flood Alert issued on 13 Feb 2022 10:53
North
In addition to the area detailed, some localised flooding problems may result from surface water. River levels are above normal. We will continue to monitor the situation.
Flood Alert issued on 8 Jan 2022 10:31
North
In addition to the area detailed, some localised flooding problems may result from surface water. River levels are above normal. We will continue to monitor the situation.
Flood Alert issued on 30 Dec 2021 02:13
North
In addition to the area detailed, some localised flooding problems may result from surface water. River levels are above normal. We will continue to monitor the situation.
Flood Alert issued on 8 Dec 2021 12:28
North
In addition to the area detailed, some localised flooding problems may result from surface water. River levels are above normal. We will continue to monitor the situation.
Flood Alert issued on 30 Nov 2021 23:38
North
In addition to the area detailed, some localised flooding problems may result from surface water.
River levels are above normal.
We will continue to monitor the situation.
Flood Alert issued on 30 Oct 2021 04:34
North
River levels are above normal. We will continue to monitor the situation.
Flood Alert issued on 27 Oct 2021 18:11
North
In addition to the area detailed, some localised flooding problems may result from surface water.
River levels are above normal.
We will continue to monitor the situation.
Flood Alert issued on 19 Oct 2021 10:27
North
In addition to the area detailed, some localised flooding problems may result from surface water. River levels are above normal. We will continue to monitor the situation.
Flood Alert issued on 2 Oct 2021 12:17
North
In addition to the area detailed, some localised flooding problems may result from surface water. River levels are above normal. We will continue to monitor the situation.
Flood Alert issued on 30 Sep 2021 09:16
North
In addition to the area detailed, some localised flooding problems may result from surface water. River levels are above normal. We will continue to monitor the situation.
Flood Alert issued on 28 Sep 2021 13:32
North
We will continue to monitor the situation.
Flood Alert issued on 7 Aug 2021 09:07
North
In addition to the area detailed, some localised flooding problems may result from surface water. River levels are above normal. We will continue to monitor the situation.
Flood Alert issued on 20 May 2021 20:06
North
In addition to the area detailed, some localised flooding problems may result from surface water.
River levels are above normal.
We will continue to monitor the situation.
Flood Alert issued on 28 Mar 2021 09:13
North
In addition to the area detailed, some localised flooding problems may result from surface water. River levels are above normal. We will continue to monitor the situation.
Flood Alert issued on 10 Mar 2021 05:07
North
In addition to the area detailed, some localised flooding problems may result from surface water. River levels are above normal. We will continue to monitor the situation.
Flood Alert issued on 23 Feb 2021 20:39
North
In addition to the area detailed, some localised flooding problems may result from surface water. River levels are above normal. We will continue to monitor the situation.
Flood Alert issued on 19 Feb 2021 17:37
North
In addition to the area detailed, some localised flooding problems may result from surface water. River levels are above normal. We will continue to monitor the situation.
Flood Alert issued on 19 Jan 2021 05:14
North
In addition to the area detailed, some localised flooding problems may result from surface water. River levels are above normal. We will continue to monitor the situation.
Flood Alert issued on 12 Jan 2021 04:00
North
In addition to the area detailed, some localised flooding problems may result from surface water.
River levels are above normal.
We will continue to monitor the situation.
Flood Alert issued on 18 Dec 2020 13:34
North
In addition to the area detailed, some localised flooding problems may result from surface water.
River levels are above normal.
We will continue to monitor the situation.
Flood Alert issued on 18 Dec 2020 00:17
North
In addition to the area detailed, some localised flooding problems may result from surface water. River levels are above normal. We will continue to monitor the
situation.
Flood Alert issued on 14 Dec 2020 10:40
North
In addition to the area detailed, some localised flooding problems may result from surface water. River levels are above normal. We will continue to monitor
the situation.
Flood Alert issued on 20 Nov 2020 11:33
North
In addition to the area detailed, some localised flooding problems may result from surface water. River levels are above normal. We will continue to monitor the
situation.
Flood Alert issued on 18 Nov 2020 11:03
North
In addition to the area detailed, some localised flooding problems may result from surface water. River levels are above normal. We will continue to monitor
the situation.
Flood Alert issued on 16 Nov 2020 19:47
North
In addition to the area detailed, some localised flooding problems may result from surface water.
River levels are above normal.
We will continue to monitor the situation.
Flood Alert issued on 29 Oct 2020 09:42
North
In addition to the area detailed, some localised flooding problems may result from surface water. River levels are above normal. We will continue to monitor the situation.
Flood Alert issued on 8 Oct 2020 03:33
North
In addition to the area detailed, some localised flooding problems may result from surface water. River levels are above normal. We will continue to monitor the situation.
Flood Alert issued on 4 Oct 2020 07:28
North
In addition to the area detailed, some localised flooding problems may result from surface water.
River levels are above normal.
We will continue to monitor the situation.
Flood Alert issued on 3 Sep 2020 01:42
North
In addition to the area detailed, some localised flooding problems may result from surface water.
River levels are above normal.
We will continue to monitor the situation.
Flood Alert issued on 25 Aug 2020 08:14
North
In addition to the area detailed, some localised flooding problems may result from surface water.
River levels are above normal.
We will continue to monitor the situation.
Flood Alert issued on 5 Aug 2020 03:06
North
In addition to the area detailed, some localised flooding problems may result from surface water.
River levels are above normal.
We will continue to monitor the situation.
Flood Alert issued on 3 Jul 2020 13:50
North
In addition to the area detailed, some localised flooding problems may result from surface water. River levels are above normal. We will continue to
monitor the situation.
Flood Alert issued on 29 Jun 2020 09:39
North
In addition to the area detailed, some localised flooding problems may result from surface water. River levels are above normal. We will continue to monitor the situation.