River level Amwell Loop at Tumbling Bay Weir DS

Check for flood warnings in this area

Latest recorded level 30.32m at 8:00am Friday 7 August 2020.

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
• Show highest recorded level

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Observed data

DateTime	Value	Error
2020-08-07T07:00Z	30.317	false
2020-08-07T06:45Z	30.323	false
2020-08-07T06:30Z	30.326	false
2020-08-07T06:15Z	30.332	false
2020-08-07T06:00Z	30.335	false
2020-08-07T05:45Z	30.342	false
2020-08-07T05:30Z	30.348	false
2020-08-07T05:15Z	30.351	false
2020-08-07T05:00Z	30.36	false
2020-08-07T04:45Z	30.363	false
2020-08-07T04:30Z	30.366	false
2020-08-07T04:15Z	30.366	false
2020-08-07T04:00Z	30.366	false
2020-08-07T03:45Z	30.366	false
2020-08-07T03:30Z	30.366	false
2020-08-07T03:15Z	30.366	false
2020-08-07T03:00Z	30.366	false
2020-08-07T02:45Z	30.366	false
2020-08-07T02:30Z	30.366	false
2020-08-07T02:15Z	30.366	false
2020-08-07T02:00Z	30.366	false
2020-08-07T01:45Z	30.366	false
2020-08-07T01:30Z	30.366	false
2020-08-07T01:15Z	30.366	false
2020-08-07T01:00Z	30.366	false
2020-08-07T00:45Z	30.366	false
2020-08-07T00:30Z	30.366	false
2020-08-07T00:15Z	30.366	false
2020-08-07T00:00Z	30.363	false
2020-08-06T23:45Z	30.363	false
2020-08-06T23:30Z	30.363	false
2020-08-06T23:15Z	30.363	false
2020-08-06T23:00Z	30.363	false
2020-08-06T22:45Z	30.363	false
2020-08-06T22:30Z	30.363	false
2020-08-06T22:15Z	30.363	false
2020-08-06T22:00Z	30.363	false
2020-08-06T21:45Z	30.363	false
2020-08-06T21:30Z	30.36	false
2020-08-06T21:15Z	30.36	false
2020-08-06T21:00Z	30.36	false
2020-08-06T20:45Z	30.363	false
2020-08-06T20:30Z	30.36	false
2020-08-06T20:15Z	30.363	false
2020-08-06T20:00Z	30.366	false
2020-08-06T19:45Z	30.366	false
2020-08-06T19:30Z	30.369	false
2020-08-06T19:15Z	30.366	false
2020-08-06T19:00Z	30.36	false
2020-08-06T18:45Z	30.36	false
2020-08-06T18:30Z	30.36	false
2020-08-06T18:15Z	30.357	false
2020-08-06T18:00Z	30.354	false
2020-08-06T17:45Z	30.348	false
2020-08-06T17:30Z	30.348	false
2020-08-06T17:15Z	30.348	false
2020-08-06T17:00Z	30.351	false
2020-08-06T16:45Z	30.348	false
2020-08-06T16:30Z	30.354	false
2020-08-06T16:15Z	30.357	false
2020-08-06T16:00Z	30.351	false
2020-08-06T15:45Z	30.351	false
2020-08-06T15:30Z	30.348	false
2020-08-06T15:15Z	30.354	false
2020-08-06T15:00Z	30.342	false
2020-08-06T14:45Z	30.345	false
2020-08-06T14:30Z	30.345	false
2020-08-06T14:15Z	30.345	false
2020-08-06T14:00Z	30.345	false
2020-08-06T13:45Z	30.345	false
2020-08-06T13:30Z	30.348	false
2020-08-06T13:15Z	30.348	false
2020-08-06T13:00Z	30.348	false
2020-08-06T12:45Z	30.351	false
2020-08-06T12:30Z	30.354	false
2020-08-06T12:15Z	30.357	false
2020-08-06T12:00Z	30.351	false
2020-08-06T11:45Z	30.348	false
2020-08-06T11:30Z	30.342	false
2020-08-06T11:15Z	30.345	false
2020-08-06T11:00Z	30.345	false
2020-08-06T10:45Z	30.354	false
2020-08-06T10:30Z	30.351	false
2020-08-06T10:15Z	30.357	false
2020-08-06T10:00Z	30.357	false
2020-08-06T09:45Z	30.363	false
2020-08-06T09:30Z	30.36	false
2020-08-06T09:15Z	30.354	false
2020-08-06T09:00Z	30.357	false
2020-08-06T08:45Z	30.357	false
2020-08-06T08:30Z	30.357	false
2020-08-06T08:15Z	30.357	false
2020-08-06T08:00Z	30.357	false
2020-08-06T07:45Z	30.357	false
2020-08-06T07:30Z	30.357	false
2020-08-06T07:15Z	30.357	false
2020-08-06T07:00Z	30.36	false
2020-08-06T06:45Z	30.36	false
2020-08-06T06:30Z	30.36	false
2020-08-06T06:15Z	30.36	false
2020-08-06T06:00Z	30.36	false
2020-08-06T05:45Z	30.36	false
2020-08-06T05:30Z	30.36	false
2020-08-06T05:15Z	30.36	false
2020-08-06T05:00Z	30.36	false
2020-08-06T04:45Z	30.36	false
2020-08-06T04:30Z	30.36	false
2020-08-06T04:15Z	30.36	false
2020-08-06T04:00Z	30.36	false
2020-08-06T03:45Z	30.36	false
2020-08-06T03:30Z	30.36	false
2020-08-06T03:15Z	30.36	false
2020-08-06T03:00Z	30.36	false
2020-08-06T02:45Z	30.36	false
2020-08-06T02:30Z	30.36	false
2020-08-06T02:15Z	30.363	false
2020-08-06T02:00Z	30.363	false
2020-08-06T01:45Z	30.36	false
2020-08-06T01:30Z	30.36	false
2020-08-06T01:15Z	30.363	false
2020-08-06T01:00Z	30.36	false
2020-08-06T00:45Z	30.36	false
2020-08-06T00:30Z	30.36	false
2020-08-06T00:15Z	30.36	false
2020-08-06T00:00Z	30.36	false
2020-08-05T23:45Z	30.36	false
2020-08-05T23:30Z	30.36	false
2020-08-05T23:15Z	30.36	false
2020-08-05T23:00Z	30.36	false
2020-08-05T22:45Z	30.357	false
2020-08-05T22:30Z	30.357	false
2020-08-05T22:15Z	30.357	false
2020-08-05T22:00Z	30.357	false
2020-08-05T21:45Z	30.357	false
2020-08-05T21:30Z	30.354	false
2020-08-05T21:15Z	30.354	false
2020-08-05T21:00Z	30.354	false
2020-08-05T20:45Z	30.351	false
2020-08-05T20:30Z	30.351	false
2020-08-05T20:15Z	30.351	false
2020-08-05T20:00Z	30.351	false
2020-08-05T19:45Z	30.348	false
2020-08-05T19:30Z	30.348	false
2020-08-05T19:15Z	30.345	false
2020-08-05T19:00Z	30.345	false
2020-08-05T18:45Z	30.345	false
2020-08-05T18:30Z	30.342	false
2020-08-05T18:15Z	30.342	false
2020-08-05T18:00Z	30.342	false
2020-08-05T17:45Z	30.342	false
2020-08-05T17:30Z	30.342	false
2020-08-05T17:15Z	30.338	false
2020-08-05T17:00Z	30.338	false
2020-08-05T16:45Z	30.338	false
2020-08-05T16:30Z	30.342	false
2020-08-05T16:15Z	30.338	false
2020-08-05T16:00Z	30.345	false
2020-08-05T15:45Z	30.345	false
2020-08-05T15:30Z	30.348	false
2020-08-05T15:15Z	30.348	false
2020-08-05T15:00Z	30.351	false
2020-08-05T14:45Z	30.338	false
2020-08-05T14:30Z	30.335	false
2020-08-05T14:15Z	30.342	false
2020-08-05T14:00Z	30.345	false
2020-08-05T13:45Z	30.348	false
2020-08-05T13:30Z	30.351	false
2020-08-05T13:15Z	30.366	false
2020-08-05T13:00Z	30.357	false
2020-08-05T12:45Z	30.36	false
2020-08-05T12:30Z	30.36	false
2020-08-05T12:15Z	30.36	false
2020-08-05T12:00Z	30.354	false
2020-08-05T11:45Z	30.351	false
2020-08-05T11:30Z	30.351	false
2020-08-05T11:15Z	30.354	false
2020-08-05T11:00Z	30.357	false
2020-08-05T10:45Z	30.357	false
2020-08-05T10:30Z	30.363	false
2020-08-05T10:15Z	30.366	false
2020-08-05T10:00Z	30.36	false
2020-08-05T09:45Z	30.36	false
2020-08-05T09:30Z	30.36	false
2020-08-05T09:15Z	30.36	false
2020-08-05T09:00Z	30.357	false
2020-08-05T08:45Z	30.357	false
2020-08-05T08:30Z	30.36	false
2020-08-05T08:15Z	30.36	false
2020-08-05T08:00Z	30.36	false
2020-08-05T07:45Z	30.36	false
2020-08-05T07:30Z	30.36	false
2020-08-05T07:15Z	30.36	false
2020-08-05T07:00Z	30.36	false
2020-08-05T06:45Z	30.36	false
2020-08-05T06:30Z	30.36	false
2020-08-05T06:15Z	30.363	false
2020-08-05T06:00Z	30.363	false
2020-08-05T05:45Z	30.363	false
2020-08-05T05:30Z	30.363	false
2020-08-05T05:15Z	30.363	false
2020-08-05T05:00Z	30.363	false
2020-08-05T04:45Z	30.363	false
2020-08-05T04:30Z	30.363	false
2020-08-05T04:15Z	30.363	false
2020-08-05T04:00Z	30.363	false
2020-08-05T03:45Z	30.363	false
2020-08-05T03:30Z	30.363	false
2020-08-05T03:15Z	30.366	false
2020-08-05T03:00Z	30.363	false
2020-08-05T02:45Z	30.363	false
2020-08-05T02:30Z	30.366	false
2020-08-05T02:15Z	30.366	false
2020-08-05T02:00Z	30.366	false
2020-08-05T01:45Z	30.363	false
2020-08-05T01:30Z	30.363	false
2020-08-05T01:15Z	30.363	false
2020-08-05T01:00Z	30.363	false
2020-08-05T00:45Z	30.363	false
2020-08-05T00:30Z	30.363	false
2020-08-05T00:15Z	30.363	false
2020-08-05T00:00Z	30.363	false
2020-08-04T23:45Z	30.366	false
2020-08-04T23:30Z	30.363	false
2020-08-04T23:15Z	30.363	false
2020-08-04T23:00Z	30.366	false
2020-08-04T22:45Z	30.363	false
2020-08-04T22:30Z	30.363	false
2020-08-04T22:15Z	30.363	false
2020-08-04T22:00Z	30.363	false
2020-08-04T21:45Z	30.363	false
2020-08-04T21:30Z	30.363	false
2020-08-04T21:15Z	30.363	false
2020-08-04T21:00Z	30.363	false
2020-08-04T20:45Z	30.363	false
2020-08-04T20:30Z	30.363	false
2020-08-04T20:15Z	30.363	false
2020-08-04T20:00Z	30.363	false
2020-08-04T19:45Z	30.366	false
2020-08-04T19:30Z	30.363	false
2020-08-04T19:15Z	30.363	false
2020-08-04T19:00Z	30.36	false
2020-08-04T18:45Z	30.357	false
2020-08-04T18:30Z	30.354	false
2020-08-04T18:15Z	30.354	false
2020-08-04T18:00Z	30.351	false
2020-08-04T17:45Z	30.348	false
2020-08-04T17:30Z	30.348	false
2020-08-04T17:15Z	30.348	false
2020-08-04T17:00Z	30.351	false
2020-08-04T16:45Z	30.351	false
2020-08-04T16:30Z	30.348	false
2020-08-04T16:15Z	30.348	false
2020-08-04T16:00Z	30.348	false
2020-08-04T15:45Z	30.348	false
2020-08-04T15:30Z	30.348	false
2020-08-04T15:15Z	30.348	false
2020-08-04T15:00Z	30.348	false
2020-08-04T14:45Z	30.348	false
2020-08-04T14:30Z	30.345	false
2020-08-04T14:15Z	30.345	false
2020-08-04T14:00Z	30.345	false
2020-08-04T13:45Z	30.345	false
2020-08-04T13:30Z	30.348	false
2020-08-04T13:15Z	30.348	false
2020-08-04T13:00Z	30.345	false
2020-08-04T12:45Z	30.348	false
2020-08-04T12:30Z	30.351	false
2020-08-04T12:15Z	30.351	false
2020-08-04T12:00Z	30.351	false
2020-08-04T11:45Z	30.351	false
2020-08-04T11:30Z	30.354	false
2020-08-04T11:15Z	30.357	false
2020-08-04T11:00Z	30.357	false
2020-08-04T10:45Z	30.357	false
2020-08-04T10:30Z	30.357	false
2020-08-04T10:15Z	30.357	false
2020-08-04T10:00Z	30.357	false
2020-08-04T09:45Z	30.363	false
2020-08-04T09:30Z	30.363	false
2020-08-04T09:15Z	30.36	false
2020-08-04T09:00Z	30.363	false
2020-08-04T08:45Z	30.363	false
2020-08-04T08:30Z	30.363	false
2020-08-04T08:15Z	30.363	false
2020-08-04T08:00Z	30.363	false
2020-08-04T07:45Z	30.363	false
2020-08-04T07:30Z	30.363	false
2020-08-04T07:15Z	30.363	false
2020-08-04T07:00Z	30.363	false
2020-08-04T06:45Z	30.363	false
2020-08-04T06:30Z	30.363	false
2020-08-04T06:15Z	30.363	false
2020-08-04T06:00Z	30.366	false
2020-08-04T05:45Z	30.366	false
2020-08-04T05:30Z	30.366	false
2020-08-04T05:15Z	30.366	false
2020-08-04T05:00Z	30.366	false
2020-08-04T04:45Z	30.366	false
2020-08-04T04:30Z	30.366	false
2020-08-04T04:15Z	30.369	false
2020-08-04T04:00Z	30.369	false
2020-08-04T03:45Z	30.369	false
2020-08-04T03:30Z	30.369	false
2020-08-04T03:15Z	30.369	false
2020-08-04T03:00Z	30.369	false
2020-08-04T02:45Z	30.369	false
2020-08-04T02:30Z	30.369	false
2020-08-04T02:15Z	30.369	false
2020-08-04T02:00Z	30.369	false
2020-08-04T01:45Z	30.369	false
2020-08-04T01:30Z	30.369	false
2020-08-04T01:15Z	30.369	false
2020-08-04T01:00Z	30.369	false
2020-08-04T00:45Z	30.369	false
2020-08-04T00:30Z	30.369	false
2020-08-04T00:15Z	30.372	false
2020-08-04T00:00Z	30.369	false
2020-08-03T23:45Z	30.369	false
2020-08-03T23:30Z	30.369	false
2020-08-03T23:15Z	30.369	false
2020-08-03T23:00Z	30.369	false
2020-08-03T22:45Z	30.369	false
2020-08-03T22:30Z	30.369	false
2020-08-03T22:15Z	30.369	false
2020-08-03T22:00Z	30.369	false
2020-08-03T21:45Z	30.369	false
2020-08-03T21:30Z	30.366	false
2020-08-03T21:15Z	30.366	false
2020-08-03T21:00Z	30.366	false
2020-08-03T20:45Z	30.366	false
2020-08-03T20:30Z	30.366	false
2020-08-03T20:15Z	30.366	false
2020-08-03T20:00Z	30.366	false
2020-08-03T19:45Z	30.363	false
2020-08-03T19:30Z	30.363	false
2020-08-03T19:15Z	30.363	false
2020-08-03T19:00Z	30.36	false
2020-08-03T18:45Z	30.36	false
2020-08-03T18:30Z	30.36	false
2020-08-03T18:15Z	30.36	false
2020-08-03T18:00Z	30.36	false
2020-08-03T17:45Z	30.36	false
2020-08-03T17:30Z	30.36	false
2020-08-03T17:15Z	30.36	false
2020-08-03T17:00Z	30.363	false
2020-08-03T16:45Z	30.363	false
2020-08-03T16:30Z	30.369	false
2020-08-03T16:15Z	30.363	false
2020-08-03T16:00Z	30.36	false
2020-08-03T15:45Z	30.36	false
2020-08-03T15:30Z	30.357	false
2020-08-03T15:15Z	30.357	false
2020-08-03T15:00Z	30.354	false
2020-08-03T14:45Z	30.354	false
2020-08-03T14:30Z	30.354	false
2020-08-03T14:15Z	30.351	false
2020-08-03T14:00Z	30.348	false
2020-08-03T13:45Z	30.348	false
2020-08-03T13:30Z	30.354	false
2020-08-03T13:15Z	30.354	false
2020-08-03T13:00Z	30.36	false
2020-08-03T12:45Z	30.354	false
2020-08-03T12:30Z	30.357	false
2020-08-03T12:15Z	30.357	false
2020-08-03T12:00Z	30.357	false
2020-08-03T11:45Z	30.354	false
2020-08-03T11:30Z	30.354	false
2020-08-03T11:15Z	30.36	false
2020-08-03T11:00Z	30.36	false
2020-08-03T10:45Z	30.36	false
2020-08-03T10:30Z	30.36	false
2020-08-03T10:15Z	30.366	false
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2020-08-03T09:45Z	30.366	false
2020-08-03T09:30Z	30.366	false
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2020-08-03T08:15Z	30.366	false
2020-08-03T08:00Z	30.369	false
2020-08-03T07:45Z	30.366	false
2020-08-03T07:30Z	30.366	false
2020-08-03T07:15Z	30.366	false
2020-08-03T07:00Z	30.369	false
2020-08-03T06:45Z	30.369	false
2020-08-03T06:30Z	30.369	false
2020-08-03T06:15Z	30.369	false
2020-08-03T06:00Z	30.369	false
2020-08-03T05:45Z	30.369	false
2020-08-03T05:30Z	30.369	false
2020-08-03T05:15Z	30.372	false
2020-08-03T05:00Z	30.372	false
2020-08-03T04:45Z	30.372	false
2020-08-03T04:30Z	30.372	false
2020-08-03T04:15Z	30.372	false
2020-08-03T04:00Z	30.372	false
2020-08-03T03:45Z	30.372	false
2020-08-03T03:30Z	30.372	false
2020-08-03T03:15Z	30.372	false
2020-08-03T03:00Z	30.372	false
2020-08-03T02:45Z	30.372	false
2020-08-03T02:30Z	30.372	false
2020-08-03T02:15Z	30.372	false
2020-08-03T02:00Z	30.372	false
2020-08-03T01:45Z	30.372	false
2020-08-03T01:30Z	30.372	false
2020-08-03T01:15Z	30.372	false
2020-08-03T01:00Z	30.372	false
2020-08-03T00:45Z	30.372	false
2020-08-03T00:30Z	30.372	false
2020-08-03T00:15Z	30.372	false
2020-08-03T00:00Z	30.372	false
2020-08-02T23:45Z	30.372	false
2020-08-02T23:30Z	30.372	false
2020-08-02T23:15Z	30.372	false
2020-08-02T23:00Z	30.372	false
2020-08-02T22:45Z	30.372	false
2020-08-02T22:30Z	30.372	false
2020-08-02T22:15Z	30.369	false
2020-08-02T22:00Z	30.369	false
2020-08-02T21:45Z	30.369	false
2020-08-02T21:30Z	30.366	false
2020-08-02T21:15Z	30.366	false
2020-08-02T21:00Z	30.366	false
2020-08-02T20:45Z	30.366	false
2020-08-02T20:30Z	30.363	false
2020-08-02T20:15Z	30.363	false
2020-08-02T20:00Z	30.36	false
2020-08-02T19:45Z	30.36	false
2020-08-02T19:30Z	30.357	false
2020-08-02T19:15Z	30.348	false
2020-08-02T19:00Z	30.348	false
2020-08-02T18:45Z	30.345	false
2020-08-02T18:30Z	30.338	false
2020-08-02T18:15Z	30.342	false
2020-08-02T18:00Z	30.345	false
2020-08-02T17:45Z	30.345	false
2020-08-02T17:30Z	30.345	false
2020-08-02T17:15Z	30.345	false
2020-08-02T17:00Z	30.348	false
2020-08-02T16:45Z	30.354	false
2020-08-02T16:30Z	30.348	false
2020-08-02T16:15Z	30.357	false
2020-08-02T16:00Z	30.345	false
2020-08-02T15:45Z	30.342	false
2020-08-02T15:30Z	30.342	false
2020-08-02T15:15Z	30.345	false
2020-08-02T15:00Z	30.348	false
2020-08-02T14:45Z	30.351	false
2020-08-02T14:30Z	30.354	false
2020-08-02T14:15Z	30.354	false
2020-08-02T14:00Z	30.345	false
2020-08-02T13:45Z	30.345	false
2020-08-02T13:30Z	30.351	false
2020-08-02T13:15Z	30.351	false
2020-08-02T13:00Z	30.357	false
2020-08-02T12:45Z	30.357	false
2020-08-02T12:30Z	30.357	false
2020-08-02T12:15Z	30.36	false
2020-08-02T12:00Z	30.357	false
2020-08-02T11:45Z	30.354	false
2020-08-02T11:30Z	30.36	false
2020-08-02T11:15Z	30.351	false
2020-08-02T11:00Z	30.354	false
2020-08-02T10:45Z	30.354	false
2020-08-02T10:30Z	30.357	false
2020-08-02T10:15Z	30.357	false
2020-08-02T10:00Z	30.357	false
2020-08-02T09:45Z	30.363	false
2020-08-02T09:30Z	30.363	false
2020-08-02T09:15Z	30.366	false
2020-08-02T09:00Z	30.372	false
2020-08-02T08:45Z	30.372	false
2020-08-02T08:30Z	30.372	false
2020-08-02T08:15Z	30.372	false
2020-08-02T08:00Z	30.372	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
• View your property's long term risk of flooding

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