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Conwy catchmentDalgylch Conwy

Flood alert area Wales Conwy, Llugwy, Lledr, Machno, Merddwr, Hiraethlyn
NRW has no flood warning in force for this area. Checked 20 Sep 2026, 06:48 UTC, from Natural Resources Wales’ live warnings feed. That is a statement about this moment, not about whether the area can flood.
A warning for this area was stood down recently. It was in force and has been lifted — which is a different thing from nothing having happened here.

What this area covers

Areas around the river Conwy, from the Upper Conwy Valley and Dolwyddelan to the estuary

Natural Resources Wales’ own description of the area.

Where this area is

Boundary: Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved. Reused under the Open Government Licence v3.0. Boundaries from DataMapWales. Simplified for display — it shows roughly where the area is, and is not a property-level boundary.

River gauges in and near this area

Cwmlanerch River Station in this area
1.6 km from the centre of this area · Conwy
1.161m
20 Sep, 06:30
Llanrwst Bont Fawr River Station in this area
1.9 km from the centre of this area · Conwy
5.129mAOD
20 Sep, 06:15
Trefriw TideGauge in this area
5.0 km from the centre of this area · Conwy
2.006m
20 Sep, 06:15
Afon Lledr River Station in this area
6.1 km from the centre of this area · Lledr
0.595m
20 Sep, 06:30
Cynefail River Station
18.0 km from the centre of this area · Gelyn
0.362m
20 Sep, 06:15
Pont Y Gwyddel River Station
19.2 km from the centre of this area · Elwy
0.491m
20 Sep, 06:30
Nant Peris River Station
19.6 km from the centre of this area · Nant Peris
0.878m
20 Sep, 06:15
Beddgelert River Station
24.2 km from the centre of this area · Glaslyn
0.876m
20 Sep, 06:30
Afon Colwyn River Station
24.6 km from the centre of this area · Colwyn
0.155m
20 Sep, 06:30
Bala Weir X River Station
26.9 km from the centre of this area · Tryweryn
0.456m
20 Sep, 06:30

Distances are from the centre of the area, so a gauge marked “in this area” can show a larger distance than one outside it. A nearby gauge is context, not proof that this area is or is not flooding.

Flood warning areas inside this alert area (4)

A regional flood alert covers a wide area. These are the specific places NRW can issue a targeted flood warning for.

Conwy Valley Communities River Conwy at Gwydir Road River Conwy at Llanrwst River Conwy at Trefriw

Has it flooded here before?

Natural Resources Wales warnings FloodRadar holds for this area:

Live entries are timed by our 15-minute check (UK time), not the moment NRW issued or lifted them.

FloodRadar’s record of flood warnings for Welsh areas starts on 15 February 2006. Anything earlier is a gap in what we have banked, not a statement that this area has not flooded — it may well have. Natural Resources Wales publishes Welsh flooding information at naturalresources.wales.

Official sources for this area

Live flood warnings from Natural Resources Wales →
Floodline: 0345 988 1188 — the same number covers England, Scotland and Wales.
Welsh name: Dalgylch Conwy
NRW region: NRW Northern
Area code: 101WAFCO10

Live warnings are NRW’s and NRW is the authority on them. Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved. Reused under the Open Government Licence v3.0. Boundaries from DataMapWales. (OGL 3.0).