Gelyn at Cynefail


Current River Level: 0.418m, falling

Within the usual range for this location

Current level recorded at 10:00am, Monday 28th November GMT

Change from previous measurement: -0.001m
(recorded at 9:00am, Monday 28th November GMT)

The usual range of the Gelyn at Cynefail is between 0.08m and 0.74m. It has been between these levels for 90% of the time since monitoring began.

The typical recent level of the Gelyn at Cynefail over the past 12 months has been between 0.07m and 0.42m. It has been between these levels for at least 150 days in the past year.

The highest level ever recorded at the Gelyn at Cynefail is 1.49m, reached on Thursday 4th November 2010 at 6:45pm.

Note that this data may not take account of recent measurements, as we wait until a level has been verified by Natural Resources Wales before adding it to our records.

  • Monitoring Station: Cynefail
  • Watercourse: Gelyn
  • Nearest Town/Village: Llandderfel
  • Local Authority: Gwynedd
  • Ceremonial County: Gwynedd
  • Coordinates: 52°57'47"N 3°43'29"W (52.963272,-3.7248956)
  • OS Grid: SH8424242049 (,)
  • Mapcode (Local): GBR 67.K7NM
  • Mapcode (Global): WH66Q.RSF4
  • Open Location Code: 9C4RX77G+82
  • Maidenhead Locator System: IO82dx31
  • Natural Resources Wales Location ID: 4164
  • Natural Resources Wales Gauge ID: 4164
  • Operational Area: Dee Upper above Alwen
  • Catchment Area: Dee
  • UK Hydrometric Area: Dee (Cheshire)

Nearby Monitoring Locations

There are no other monitoring stations on the Gelyn
There are no other monitored rivers nearby
Taming the Flood by Jeremy Purseglove

Nearby Flood Warning Locations

Coast from Aberthaw to Severn Bridge
Coast from Aberthaw to Severn Bridge

No current or recent warnings.

North Gwynedd Catchment
areas around the rivers of North West Wales, from Abergwyngregyn to Aberdaron.

No current or recent warnings.

Lleyn Peninsula and Cardigan Bay Coastline
areas along the North West Wales coastline from the Menai Straits to Aberdyfi

No current or recent warnings.

Mawddach and Wnion Catchment
areas around the river Mawddach and river Wnion, from Fairbourne to Ganllwyd and Rhydymain

No current or recent warnings.

Glaslyn and Dwyryd Catchment
areas around the river Glaslyn and river Dwyryd, from Dyffryn Ardudwy to Nant Gwynant

No current or recent warnings.

Long term graphs will work better if you rotate your fondleslab into landscape mode.

Past Week

Long Term

Darker blue shaded areas on long term data indicate maximum and minimum levels for the date (you may need to zoom in closer to see them).

Long term data may have gaps where the API data was not available.

Download long term data as csv

Note: CSV data will include any outlying values that have been ignored by our graphing system as probably erroneous (eg, because they are ridiculously high compared to the values either side of them). It is your responsibility to filter these out if necessary.

Important! If you are planning to retrieve the csv data automatically, you must read and understand the limitations on the data and its availability.

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