River level Amwell Loop at Tumbling Bay Weir DS

Check for flood warnings in this area

Latest recorded level 30.53m at 8:15am Friday 23 July 2021.

River levels at this location in the last 5 days

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• Measured level
• When the water level reaches 30.73m here, minor flooding is possible in this area
• Highest recorded level. Hide
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Observed data

DateTime	Value	Error
2021-07-23T07:15Z	30.525	false
2021-07-23T07:00Z	30.525	false
2021-07-23T06:45Z	30.528	false
2021-07-23T06:30Z	30.534	false
2021-07-23T06:15Z	30.534	false
2021-07-23T06:00Z	30.534	false
2021-07-23T05:45Z	30.534	false
2021-07-23T05:30Z	30.534	false
2021-07-23T05:15Z	30.537	false
2021-07-23T05:00Z	30.534	false
2021-07-23T04:45Z	30.534	false
2021-07-23T04:30Z	30.534	false
2021-07-23T04:15Z	30.534	false
2021-07-23T04:00Z	30.534	false
2021-07-23T03:45Z	30.537	false
2021-07-23T03:30Z	30.537	false
2021-07-23T03:15Z	30.54	false
2021-07-23T03:00Z	30.54	false
2021-07-23T02:45Z	30.54	false
2021-07-23T02:30Z	30.543	false
2021-07-23T02:15Z	30.543	false
2021-07-23T02:00Z	30.543	false
2021-07-23T01:45Z	30.543	false
2021-07-23T01:30Z	30.546	false
2021-07-23T01:15Z	30.546	false
2021-07-23T01:00Z	30.546	false
2021-07-23T00:45Z	30.546	false
2021-07-23T00:30Z	30.546	false
2021-07-23T00:15Z	30.549	false
2021-07-23T00:00Z	30.549	false
2021-07-22T23:45Z	30.549	false
2021-07-22T23:30Z	30.549	false
2021-07-22T23:15Z	30.549	false
2021-07-22T23:00Z	30.546	false
2021-07-22T22:45Z	30.546	false
2021-07-22T22:30Z	30.546	false
2021-07-22T22:15Z	30.546	false
2021-07-22T22:00Z	30.546	false
2021-07-22T21:45Z	30.546	false
2021-07-22T21:30Z	30.546	false
2021-07-22T21:15Z	30.549	false
2021-07-22T21:00Z	30.549	false
2021-07-22T20:45Z	30.549	false
2021-07-22T20:30Z	30.552	false
2021-07-22T20:15Z	30.552	false
2021-07-22T20:00Z	30.552	false
2021-07-22T19:45Z	30.552	false
2021-07-22T19:30Z	30.555	false
2021-07-22T19:15Z	30.555	false
2021-07-22T19:00Z	30.558	false
2021-07-22T18:45Z	30.558	false
2021-07-22T18:30Z	30.561	false
2021-07-22T18:15Z	30.561	false
2021-07-22T18:00Z	30.561	false
2021-07-22T17:45Z	30.561	false
2021-07-22T17:30Z	30.561	false
2021-07-22T17:15Z	30.558	false
2021-07-22T17:00Z	30.558	false
2021-07-22T16:45Z	30.558	false
2021-07-22T16:30Z	30.558	false
2021-07-22T16:15Z	30.561	false
2021-07-22T16:00Z	30.567	false
2021-07-22T15:45Z	30.564	false
2021-07-22T15:30Z	30.57	false
2021-07-22T15:15Z	30.576	false
2021-07-22T15:00Z	30.576	false
2021-07-22T14:45Z	30.573	false
2021-07-22T14:30Z	30.57	false
2021-07-22T14:15Z	30.567	false
2021-07-22T14:00Z	30.561	false
2021-07-22T13:45Z	30.558	false
2021-07-22T13:30Z	30.555	false
2021-07-22T13:15Z	30.549	false
2021-07-22T13:00Z	30.546	false
2021-07-22T12:45Z	30.546	false
2021-07-22T12:30Z	30.543	false
2021-07-22T12:15Z	30.543	false
2021-07-22T12:00Z	30.54	false
2021-07-22T11:45Z	30.54	false
2021-07-22T11:30Z	30.537	false
2021-07-22T11:15Z	30.537	false
2021-07-22T11:00Z	30.534	false
2021-07-22T10:45Z	30.534	false
2021-07-22T10:30Z	30.531	false
2021-07-22T10:15Z	30.531	false
2021-07-22T10:00Z	30.534	false
2021-07-22T09:45Z	30.534	false
2021-07-22T09:30Z	30.531	false
2021-07-22T09:15Z	30.531	false
2021-07-22T09:00Z	30.531	false
2021-07-22T08:45Z	30.522	false
2021-07-22T08:30Z	30.531	false
2021-07-22T08:15Z	30.531	false
2021-07-22T08:00Z	30.534	false
2021-07-22T07:45Z	30.534	false
2021-07-22T07:30Z	30.54	false
2021-07-22T07:15Z	30.543	false
2021-07-22T07:00Z	30.543	false
2021-07-22T06:45Z	30.54	false
2021-07-22T06:30Z	30.543	false
2021-07-22T06:15Z	30.543	false
2021-07-22T06:00Z	30.543	false
2021-07-22T05:45Z	30.543	false
2021-07-22T05:30Z	30.543	false
2021-07-22T05:15Z	30.543	false
2021-07-22T05:00Z	30.543	false
2021-07-22T04:45Z	30.54	false
2021-07-22T04:30Z	30.543	false
2021-07-22T04:15Z	30.543	false
2021-07-22T04:00Z	30.543	false
2021-07-22T03:45Z	30.543	false
2021-07-22T03:30Z	30.546	false
2021-07-22T03:15Z	30.546	false
2021-07-22T03:00Z	30.546	false
2021-07-22T02:45Z	30.549	false
2021-07-22T02:30Z	30.549	false
2021-07-22T02:15Z	30.549	false
2021-07-22T02:00Z	30.552	false
2021-07-22T01:45Z	30.552	false
2021-07-22T01:30Z	30.555	false
2021-07-22T01:15Z	30.555	false
2021-07-22T01:00Z	30.555	false
2021-07-22T00:45Z	30.558	false
2021-07-22T00:30Z	30.558	false
2021-07-22T00:15Z	30.558	false
2021-07-22T00:00Z	30.561	false
2021-07-21T23:45Z	30.561	false
2021-07-21T23:30Z	30.561	false
2021-07-21T23:15Z	30.564	false
2021-07-21T23:00Z	30.564	false
2021-07-21T22:45Z	30.564	false
2021-07-21T22:30Z	30.564	false
2021-07-21T22:15Z	30.564	false
2021-07-21T22:00Z	30.564	false
2021-07-21T21:45Z	30.567	false
2021-07-21T21:30Z	30.567	false
2021-07-21T21:15Z	30.567	false
2021-07-21T21:00Z	30.567	false
2021-07-21T20:45Z	30.567	false
2021-07-21T20:30Z	30.567	false
2021-07-21T20:15Z	30.567	false
2021-07-21T20:00Z	30.567	false
2021-07-21T19:45Z	30.567	false
2021-07-21T19:30Z	30.564	false
2021-07-21T19:15Z	30.564	false
2021-07-21T19:00Z	30.564	false
2021-07-21T18:45Z	30.564	false
2021-07-21T18:30Z	30.567	false
2021-07-21T18:15Z	30.573	false
2021-07-21T18:00Z	30.58	false
2021-07-21T17:45Z	30.552	false
2021-07-21T17:30Z	30.546	false
2021-07-21T17:15Z	30.537	false
2021-07-21T17:00Z	30.531	false
2021-07-21T16:45Z	30.528	false
2021-07-21T16:30Z	30.531	false
2021-07-21T16:15Z	30.537	false
2021-07-21T16:00Z	30.549	false
2021-07-21T15:45Z	30.564	false
2021-07-21T15:30Z	30.576	false
2021-07-21T15:15Z	30.57	false
2021-07-21T15:00Z	30.573	false
2021-07-21T14:45Z	30.567	false
2021-07-21T14:30Z	30.567	false
2021-07-21T14:15Z	30.564	false
2021-07-21T14:00Z	30.567	false
2021-07-21T13:45Z	30.573	false
2021-07-21T13:30Z	30.573	false
2021-07-21T13:15Z	30.576	false
2021-07-21T13:00Z	30.576	false
2021-07-21T12:45Z	30.576	false
2021-07-21T12:30Z	30.57	false
2021-07-21T12:15Z	30.57	false
2021-07-21T12:00Z	30.567	false
2021-07-21T11:45Z	30.561	false
2021-07-21T11:30Z	30.552	false
2021-07-21T11:15Z	30.534	false
2021-07-21T11:00Z	30.528	false
2021-07-21T10:45Z	30.54	false
2021-07-21T10:30Z	30.546	false
2021-07-21T10:15Z	30.558	false
2021-07-21T10:00Z	30.567	false
2021-07-21T09:45Z	30.567	false
2021-07-21T09:30Z	30.567	false
2021-07-21T09:15Z	30.57	false
2021-07-21T09:00Z	30.57	false
2021-07-21T08:45Z	30.57	false
2021-07-21T08:30Z	30.567	false
2021-07-21T08:15Z	30.57	false
2021-07-21T08:00Z	30.573	false
2021-07-21T07:45Z	30.573	false
2021-07-21T07:30Z	30.576	false
2021-07-21T07:15Z	30.583	false
2021-07-21T07:00Z	30.592	false
2021-07-21T06:45Z	30.589	false
2021-07-21T06:30Z	30.586	false
2021-07-21T06:15Z	30.583	false
2021-07-21T06:00Z	30.576	false
2021-07-21T05:45Z	30.573	false
2021-07-21T05:30Z	30.57	false
2021-07-21T05:15Z	30.567	false
2021-07-21T05:00Z	30.564	false
2021-07-21T04:45Z	30.561	false
2021-07-21T04:30Z	30.558	false
2021-07-21T04:15Z	30.555	false
2021-07-21T04:00Z	30.555	false
2021-07-21T03:45Z	30.552	false
2021-07-21T03:30Z	30.552	false
2021-07-21T03:15Z	30.552	false
2021-07-21T03:00Z	30.552	false
2021-07-21T02:45Z	30.549	false
2021-07-21T02:30Z	30.549	false
2021-07-21T02:15Z	30.549	false
2021-07-21T02:00Z	30.549	false
2021-07-21T01:45Z	30.549	false
2021-07-21T01:30Z	30.549	false
2021-07-21T01:15Z	30.552	false
2021-07-21T01:00Z	30.552	false
2021-07-21T00:45Z	30.552	false
2021-07-21T00:30Z	30.552	false
2021-07-21T00:15Z	30.555	false
2021-07-21T00:00Z	30.555	false
2021-07-20T23:45Z	30.558	false
2021-07-20T23:30Z	30.558	false
2021-07-20T23:15Z	30.558	false
2021-07-20T23:00Z	30.561	false
2021-07-20T22:45Z	30.561	false
2021-07-20T22:30Z	30.564	false
2021-07-20T22:15Z	30.561	false
2021-07-20T22:00Z	30.561	false
2021-07-20T21:45Z	30.558	false
2021-07-20T21:30Z	30.555	false
2021-07-20T21:15Z	30.552	false
2021-07-20T21:00Z	30.552	false
2021-07-20T20:45Z	30.549	false
2021-07-20T20:30Z	30.552	false
2021-07-20T20:15Z	30.552	false
2021-07-20T20:00Z	30.552	false
2021-07-20T19:45Z	30.552	false
2021-07-20T19:30Z	30.558	false
2021-07-20T19:15Z	30.561	false
2021-07-20T19:00Z	30.567	false
2021-07-20T18:45Z	30.573	false
2021-07-20T18:30Z	30.576	false
2021-07-20T18:15Z	30.576	false
2021-07-20T18:00Z	30.561	false
2021-07-20T17:45Z	30.558	false
2021-07-20T17:30Z	30.552	false
2021-07-20T17:15Z	30.543	false
2021-07-20T17:00Z	30.534	false
2021-07-20T16:45Z	30.534	false
2021-07-20T16:30Z	30.537	false
2021-07-20T16:15Z	30.537	false
2021-07-20T16:00Z	30.534	false
2021-07-20T15:45Z	30.54	false
2021-07-20T15:30Z	30.546	false
2021-07-20T15:15Z	30.549	false
2021-07-20T15:00Z	30.564	false
2021-07-20T14:45Z	30.564	false
2021-07-20T14:30Z	30.58	false
2021-07-20T14:15Z	30.604	false
2021-07-20T14:00Z	30.613	false
2021-07-20T13:45Z	30.628	false
2021-07-20T13:30Z	30.561	false
2021-07-20T13:15Z	30.543	false
2021-07-20T13:00Z	30.543	false
2021-07-20T12:45Z	30.552	false
2021-07-20T12:30Z	30.543	false
2021-07-20T12:15Z	30.543	false
2021-07-20T12:00Z	30.546	false
2021-07-20T11:45Z	30.546	false
2021-07-20T11:30Z	30.543	false
2021-07-20T11:15Z	30.54	false
2021-07-20T11:00Z	30.54	false
2021-07-20T10:45Z	30.54	false
2021-07-20T10:30Z	30.54	false
2021-07-20T10:15Z	30.531	false
2021-07-20T10:00Z	30.534	false
2021-07-20T09:45Z	30.534	false
2021-07-20T09:30Z	30.546	false
2021-07-20T09:15Z	30.543	false
2021-07-20T09:00Z	30.543	false
2021-07-20T08:45Z	30.54	false
2021-07-20T08:30Z	30.54	false
2021-07-20T08:15Z	30.54	false
2021-07-20T08:00Z	30.54	false
2021-07-20T07:45Z	30.546	false
2021-07-20T07:30Z	30.546	false
2021-07-20T07:15Z	30.543	false
2021-07-20T07:00Z	30.543	false
2021-07-20T06:45Z	30.543	false
2021-07-20T06:30Z	30.543	false
2021-07-20T06:15Z	30.543	false
2021-07-20T06:00Z	30.543	false
2021-07-20T05:45Z	30.543	false
2021-07-20T05:30Z	30.546	false
2021-07-20T05:15Z	30.543	false
2021-07-20T05:00Z	30.546	false
2021-07-20T04:45Z	30.543	false
2021-07-20T04:30Z	30.546	false
2021-07-20T04:15Z	30.543	false
2021-07-20T04:00Z	30.543	false
2021-07-20T03:45Z	30.543	false
2021-07-20T03:30Z	30.546	false
2021-07-20T03:15Z	30.546	false
2021-07-20T03:00Z	30.549	false
2021-07-20T02:45Z	30.549	false
2021-07-20T02:30Z	30.549	false
2021-07-20T02:15Z	30.552	false
2021-07-20T02:00Z	30.552	false
2021-07-20T01:45Z	30.552	false
2021-07-20T01:30Z	30.552	false
2021-07-20T01:15Z	30.552	false
2021-07-20T01:00Z	30.555	false
2021-07-20T00:45Z	30.555	false
2021-07-20T00:30Z	30.555	false
2021-07-20T00:15Z	30.555	false
2021-07-20T00:00Z	30.555	false
2021-07-19T23:45Z	30.558	false
2021-07-19T23:30Z	30.555	false
2021-07-19T23:15Z	30.558	false
2021-07-19T23:00Z	30.558	false
2021-07-19T22:45Z	30.558	false
2021-07-19T22:30Z	30.558	false
2021-07-19T22:15Z	30.558	false
2021-07-19T22:00Z	30.558	false
2021-07-19T21:45Z	30.558	false
2021-07-19T21:30Z	30.558	false
2021-07-19T21:15Z	30.558	false
2021-07-19T21:00Z	30.558	false
2021-07-19T20:45Z	30.558	false
2021-07-19T20:30Z	30.558	false
2021-07-19T20:15Z	30.558	false
2021-07-19T20:00Z	30.558	false
2021-07-19T19:45Z	30.558	false
2021-07-19T19:30Z	30.558	false
2021-07-19T19:15Z	30.558	false
2021-07-19T19:00Z	30.561	false
2021-07-19T18:45Z	30.558	false
2021-07-19T18:30Z	30.558	false
2021-07-19T18:15Z	30.558	false
2021-07-19T18:00Z	30.558	false
2021-07-19T17:45Z	30.558	false
2021-07-19T17:30Z	30.558	false
2021-07-19T17:15Z	30.558	false
2021-07-19T17:00Z	30.558	false
2021-07-19T16:45Z	30.558	false
2021-07-19T16:30Z	30.555	false
2021-07-19T16:15Z	30.555	false
2021-07-19T16:00Z	30.552	false
2021-07-19T15:45Z	30.552	false
2021-07-19T15:30Z	30.552	false
2021-07-19T15:15Z	30.549	false
2021-07-19T15:00Z	30.549	false
2021-07-19T14:45Z	30.537	false
2021-07-19T14:30Z	30.54	false
2021-07-19T14:15Z	30.543	false
2021-07-19T14:00Z	30.549	false
2021-07-19T13:45Z	30.552	false
2021-07-19T13:30Z	30.555	false
2021-07-19T13:15Z	30.546	false
2021-07-19T13:00Z	30.546	false
2021-07-19T12:45Z	30.543	false
2021-07-19T12:30Z	30.549	false
2021-07-19T12:15Z	30.552	false
2021-07-19T12:00Z	30.549	false
2021-07-19T11:45Z	30.552	false
2021-07-19T11:30Z	30.552	false
2021-07-19T11:15Z	30.549	false
2021-07-19T11:00Z	30.546	false
2021-07-19T10:45Z	30.546	false
2021-07-19T10:30Z	30.549	false
2021-07-19T10:15Z	30.549	false
2021-07-19T10:00Z	30.549	false
2021-07-19T09:45Z	30.549	false
2021-07-19T09:30Z	30.549	false
2021-07-19T09:15Z	30.549	false
2021-07-19T09:00Z	30.549	false
2021-07-19T08:45Z	30.552	false
2021-07-19T08:30Z	30.549	false
2021-07-19T08:15Z	30.549	false
2021-07-19T08:00Z	30.549	false
2021-07-19T07:45Z	30.549	false

Forecast data

Key information

• Station name: Tumbling Bay Weir DS
• Station ID: 9047
• River name: Amwell Loop
• Typical range: 30.29m to 30.73m
• Highest level on record: 31.11m on 10 August 2017
• Site datum: 0.00mAOD (what does this mean?)

How are river levels measured?

The Environment agency uses a network of monitoring stations across the country. Each one has its own datum - a height in metres fixed relative to mean sea level. This height is expressed as metres above ordnance datum (mAOD). The river levels we provide for each monitoring station are all relative to its site datum.

If we didn't do this, we'd show some very high measurements, which could cause confusion. By using a local site datum, the river levels are easier to understand, especially by users familiar with the data from a particular monitoring station.

A river's height above ordnance datum can be seen by adding the site datum to the river level.

How often are river levels measured?

We use measuring stations like this one to collect water level data, usually once or twice a day. We collect data more frequently when there's a greater risk of flooding. That's why the graph might show a short time lag since the last measurement.

How might river levels affect flood risk?

Typical range

This is the usual range of river levels at this station, based on historical data.

Above typical

This means that flooding is possible because river levels at this station are currently higher than usual.
Many factors can influence the possibility of flooding - river levels are only one indicator. Always check if there's a flood warning in place at a particular location.

Below typical

This means that river levels at this station are currently lower than usual.
Drought or water management measures may be in place. Please check for the latest information on water resources and restrictions in your area.

• View nearby measuring stations

• View the flood information service for England
• Check the long term flood risk for an area in England.

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