River Levels
River Levels

Amwell Loop at Tumbling Bay Weir DS

Current River Level


At 11:30pm, Saturday 20th July BST
(10:30pm, Saturday 20th July GMT)

Within the usual range for this location

Steady, no change from previous measurement at 10:30pm, Saturday 20th July BST

Flood Warning Areas Covering Here

River Lee at Hertford and Ware

No current or recent warnings.

River Lee at Hertford

No current or recent warnings.

Other Nearby Flood Warning Areas

River Rib at Wadesmill to Hertford

No current or recent warnings.

River Beane at Hertford

No current or recent warnings.

River Ash at The Hadhams

No current or recent warnings.

Seven Day Level Chart

Long Term Level Chart

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.

Location and Technical Data

  • Monitoring Station: Tumbling Bay Weir DS
  • Watercourse: Amwell Loop
  • Nearest Town/Village: Ware
  • Local Authority: East Hertfordshire
  • Ceremonial County: Hertfordshire
  • Coordinates: 51°48'32"N 0°1'22"W (51.809124,-0.023037)
  • OS Grid: TL3639014125 (536390,214125)
  • Mapcode (Local): GBR KBM.F0T
  • Mapcode (Global): VHGPH.KS5H
  • Open Location Code: 9C3XRX5G+JQ
  • Maidenhead Locator System: IO91xt74
  • Environment Agency Location ID: 5263TH
  • Environment Agency Gauge ID: 5263TH-level-stage-i-15_min-mASD
  • River Levels Online ID: 9047
  • Water Information System ID: 5263TH
  • Operational Area: Upper Lee
  • Catchment Area: Upper Lee
  • UK Hydrometric Area: Lee
  • Environment Agency Region: Thames
  • Datum Type: Above Stage Datum (ASD)

Please note: Geographic coordinates may reflect the access point for the gauge, and not the precise location in the watercourse that it is taking readings from.

The usual range of the Amwell Loop at Tumbling Bay Weir DS is between 30.29m and 30.73m. It has been between these levels for 90% of the time since monitoring began.

The typical recent level of the Amwell Loop at Tumbling Bay Weir DS over the past 12 months has been between 30.42m and 30.56m. It has been between these levels for at least 187 days in the past year.

The highest level ever recorded at the Amwell Loop at Tumbling Bay Weir DS is 31.11m, reached on Thursday 10th August 2017 at 1:00am.

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

Nearby Monitoring Locations

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