River level Amwell Loop at Tumbling Bay Weir DS

Check for flood warnings in this area

Latest recorded level 30.59m at 7:45am Monday 20 January 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
2020-01-20T07:45Z	30.589	false
2020-01-20T07:30Z	30.589	false
2020-01-20T07:15Z	30.589	false
2020-01-20T07:00Z	30.589	false
2020-01-20T06:45Z	30.589	false
2020-01-20T06:30Z	30.586	false
2020-01-20T06:15Z	30.589	false
2020-01-20T06:00Z	30.589	false
2020-01-20T05:45Z	30.589	false
2020-01-20T05:30Z	30.589	false
2020-01-20T05:15Z	30.589	false
2020-01-20T05:00Z	30.589	false
2020-01-20T04:45Z	30.589	false
2020-01-20T04:30Z	30.589	false
2020-01-20T04:15Z	30.589	false
2020-01-20T04:00Z	30.589	false
2020-01-20T03:45Z	30.589	false
2020-01-20T03:30Z	30.592	false
2020-01-20T03:15Z	30.592	false
2020-01-20T03:00Z	30.592	false
2020-01-20T02:45Z	30.595	false
2020-01-20T02:30Z	30.595	false
2020-01-20T02:15Z	30.598	false
2020-01-20T02:00Z	30.598	false
2020-01-20T01:45Z	30.598	false
2020-01-20T01:30Z	30.598	false
2020-01-20T01:15Z	30.598	false
2020-01-20T01:00Z	30.601	false
2020-01-20T00:45Z	30.598	false
2020-01-20T00:30Z	30.598	false
2020-01-20T00:15Z	30.601	false
2020-01-20T00:00Z	30.598	false
2020-01-19T23:45Z	30.598	false
2020-01-19T23:30Z	30.598	false
2020-01-19T23:15Z	30.595	false
2020-01-19T23:00Z	30.595	false
2020-01-19T22:45Z	30.592	false
2020-01-19T22:30Z	30.592	false
2020-01-19T22:15Z	30.589	false
2020-01-19T22:00Z	30.586	false
2020-01-19T21:45Z	30.583	false
2020-01-19T21:30Z	30.58	false
2020-01-19T21:15Z	30.576	false
2020-01-19T21:00Z	30.57	false
2020-01-19T20:45Z	30.564	false
2020-01-19T20:30Z	30.558	false
2020-01-19T20:15Z	30.555	false
2020-01-19T20:00Z	30.549	false
2020-01-19T19:45Z	30.546	false
2020-01-19T19:30Z	30.549	false
2020-01-19T19:15Z	30.555	false
2020-01-19T19:00Z	30.561	false
2020-01-19T18:45Z	30.567	false
2020-01-19T18:30Z	30.573	false
2020-01-19T18:15Z	30.58	false
2020-01-19T18:00Z	30.586	false
2020-01-19T17:45Z	30.589	false
2020-01-19T17:30Z	30.589	false
2020-01-19T17:15Z	30.589	false
2020-01-19T17:00Z	30.589	false
2020-01-19T16:45Z	30.592	false
2020-01-19T16:30Z	30.592	false
2020-01-19T16:15Z	30.589	false
2020-01-19T16:00Z	30.583	false
2020-01-19T15:45Z	30.586	false
2020-01-19T15:30Z	30.586	false
2020-01-19T15:15Z	30.595	false
2020-01-19T15:00Z	30.595	false
2020-01-19T14:45Z	30.598	false
2020-01-19T14:30Z	30.598	false
2020-01-19T14:15Z	30.598	false
2020-01-19T14:00Z	30.589	false
2020-01-19T13:45Z	30.595	false
2020-01-19T13:30Z	30.586	false
2020-01-19T13:15Z	30.598	false
2020-01-19T13:00Z	30.607	false
2020-01-19T12:45Z	30.604	false
2020-01-19T12:30Z	30.601	false
2020-01-19T12:15Z	30.601	false
2020-01-19T12:00Z	30.601	false
2020-01-19T11:45Z	30.589	false
2020-01-19T11:30Z	30.583	false
2020-01-19T11:15Z	30.58	false
2020-01-19T11:00Z	30.576	false
2020-01-19T10:45Z	30.58	false
2020-01-19T10:30Z	30.583	false
2020-01-19T10:15Z	30.586	false
2020-01-19T10:00Z	30.592	false
2020-01-19T09:45Z	30.595	false
2020-01-19T09:30Z	30.598	false
2020-01-19T09:15Z	30.589	false
2020-01-19T09:00Z	30.583	false
2020-01-19T08:45Z	30.576	false
2020-01-19T08:30Z	30.583	false
2020-01-19T08:15Z	30.589	false
2020-01-19T08:00Z	30.586	false
2020-01-19T07:45Z	30.586	false
2020-01-19T07:30Z	30.589	false
2020-01-19T07:15Z	30.589	false
2020-01-19T07:00Z	30.592	false
2020-01-19T06:45Z	30.592	false
2020-01-19T06:30Z	30.592	false
2020-01-19T06:15Z	30.595	false
2020-01-19T06:00Z	30.595	false
2020-01-19T05:45Z	30.595	false
2020-01-19T05:30Z	30.595	false
2020-01-19T05:15Z	30.592	false
2020-01-19T05:00Z	30.592	false
2020-01-19T04:45Z	30.589	false
2020-01-19T04:30Z	30.586	false
2020-01-19T04:15Z	30.586	false
2020-01-19T04:00Z	30.589	false
2020-01-19T03:45Z	30.589	false
2020-01-19T03:30Z	30.592	false
2020-01-19T03:15Z	30.595	false
2020-01-19T03:00Z	30.598	false
2020-01-19T02:45Z	30.601	false
2020-01-19T02:30Z	30.601	false
2020-01-19T02:15Z	30.601	false
2020-01-19T02:00Z	30.601	false
2020-01-19T01:45Z	30.598	false
2020-01-19T01:30Z	30.598	false
2020-01-19T01:15Z	30.595	false
2020-01-19T01:00Z	30.592	false
2020-01-19T00:45Z	30.595	false
2020-01-19T00:30Z	30.598	false
2020-01-19T00:15Z	30.598	false
2020-01-19T00:00Z	30.604	false
2020-01-18T23:45Z	30.607	false
2020-01-18T23:30Z	30.607	false
2020-01-18T23:15Z	30.61	false
2020-01-18T23:00Z	30.61	false
2020-01-18T22:45Z	30.61	false
2020-01-18T22:30Z	30.61	false
2020-01-18T22:15Z	30.607	false
2020-01-18T22:00Z	30.604	false
2020-01-18T21:45Z	30.601	false
2020-01-18T21:30Z	30.601	false
2020-01-18T21:15Z	30.607	false
2020-01-18T21:00Z	30.61	false
2020-01-18T20:45Z	30.613	false
2020-01-18T20:30Z	30.616	false
2020-01-18T20:15Z	30.619	false
2020-01-18T20:00Z	30.625	false
2020-01-18T19:45Z	30.628	false
2020-01-18T19:30Z	30.631	false
2020-01-18T19:15Z	30.634	false
2020-01-18T19:00Z	30.634	false
2020-01-18T18:45Z	30.638	false
2020-01-18T18:30Z	30.634	false
2020-01-18T18:15Z	30.638	false
2020-01-18T18:00Z	30.634	false
2020-01-18T17:45Z	30.631	false
2020-01-18T17:30Z	30.628	false
2020-01-18T17:15Z	30.628	false
2020-01-18T17:00Z	30.638	false
2020-01-18T16:45Z	30.638	false
2020-01-18T16:30Z	30.638	false
2020-01-18T16:15Z	30.647	false
2020-01-18T16:00Z	30.647	false
2020-01-18T15:45Z	30.644	false
2020-01-18T15:30Z	30.641	false
2020-01-18T15:15Z	30.644	false
2020-01-18T15:00Z	30.638	false
2020-01-18T14:45Z	30.628	false
2020-01-18T14:30Z	30.622	false
2020-01-18T14:15Z	30.628	false
2020-01-18T14:00Z	30.638	false
2020-01-18T13:45Z	30.65	false
2020-01-18T13:30Z	30.665	false
2020-01-18T13:15Z	30.677	false
2020-01-18T13:00Z	30.668	false
2020-01-18T12:45Z	30.653	false
2020-01-18T12:30Z	30.641	false
2020-01-18T12:15Z	30.628	false
2020-01-18T12:00Z	30.631	false
2020-01-18T11:45Z	30.668	false
2020-01-18T11:30Z	30.647	false
2020-01-18T11:15Z	30.613	false
2020-01-18T11:00Z	30.601	false
2020-01-18T10:45Z	30.619	false
2020-01-18T10:30Z	30.619	false
2020-01-18T10:15Z	30.628	false
2020-01-18T10:00Z	30.631	false
2020-01-18T09:45Z	30.634	false
2020-01-18T09:30Z	30.638	false
2020-01-18T09:15Z	30.638	false
2020-01-18T09:00Z	30.641	false
2020-01-18T08:45Z	30.641	false
2020-01-18T08:30Z	30.641	false
2020-01-18T08:15Z	30.641	false
2020-01-18T08:00Z	30.638	false
2020-01-18T07:45Z	30.641	false
2020-01-18T07:30Z	30.647	false
2020-01-18T07:15Z	30.644	false
2020-01-18T07:00Z	30.644	false
2020-01-18T06:45Z	30.644	false
2020-01-18T06:30Z	30.644	false
2020-01-18T06:15Z	30.644	false
2020-01-18T06:00Z	30.647	false
2020-01-18T05:45Z	30.65	false
2020-01-18T05:30Z	30.653	false
2020-01-18T05:15Z	30.653	false
2020-01-18T05:00Z	30.656	false
2020-01-18T04:45Z	30.656	false
2020-01-18T04:30Z	30.656	false
2020-01-18T04:15Z	30.656	false
2020-01-18T04:00Z	30.656	false
2020-01-18T03:45Z	30.653	false
2020-01-18T03:30Z	30.653	false
2020-01-18T03:15Z	30.647	false
2020-01-18T03:00Z	30.65	false
2020-01-18T02:45Z	30.653	false
2020-01-18T02:30Z	30.653	false
2020-01-18T02:15Z	30.656	false
2020-01-18T02:00Z	30.656	false
2020-01-18T01:45Z	30.659	false
2020-01-18T01:30Z	30.659	false
2020-01-18T01:15Z	30.659	false
2020-01-18T01:00Z	30.662	false
2020-01-18T00:45Z	30.662	false
2020-01-18T00:30Z	30.662	false
2020-01-18T00:15Z	30.662	false
2020-01-18T00:00Z	30.662	false
2020-01-17T23:45Z	30.665	false
2020-01-17T23:30Z	30.668	false
2020-01-17T23:15Z	30.668	false
2020-01-17T23:00Z	30.671	false
2020-01-17T22:45Z	30.674	false
2020-01-17T22:30Z	30.674	false
2020-01-17T22:15Z	30.674	false
2020-01-17T22:00Z	30.677	false
2020-01-17T21:45Z	30.677	false
2020-01-17T21:30Z	30.677	false
2020-01-17T21:15Z	30.674	false
2020-01-17T21:00Z	30.674	false
2020-01-17T20:45Z	30.668	false
2020-01-17T20:30Z	30.665	false
2020-01-17T20:15Z	30.665	false
2020-01-17T20:00Z	30.668	false
2020-01-17T19:45Z	30.671	false
2020-01-17T19:30Z	30.674	false
2020-01-17T19:15Z	30.68	false
2020-01-17T19:00Z	30.683	false
2020-01-17T18:45Z	30.689	false
2020-01-17T18:30Z	30.692	false
2020-01-17T18:15Z	30.696	false
2020-01-17T18:00Z	30.699	false
2020-01-17T17:45Z	30.702	false
2020-01-17T17:30Z	30.705	false
2020-01-17T17:15Z	30.708	false
2020-01-17T17:00Z	30.708	false
2020-01-17T16:45Z	30.708	false
2020-01-17T16:30Z	30.711	false
2020-01-17T16:15Z	30.711	false
2020-01-17T16:00Z	30.711	false
2020-01-17T15:45Z	30.714	false
2020-01-17T15:30Z	30.72	false
2020-01-17T15:15Z	30.723	false
2020-01-17T15:00Z	30.717	false
2020-01-17T14:45Z	30.717	false
2020-01-17T14:30Z	30.711	false
2020-01-17T14:15Z	30.708	false
2020-01-17T14:00Z	30.705	false
2020-01-17T13:45Z	30.696	false
2020-01-17T13:30Z	30.692	false
2020-01-17T13:15Z	30.683	false
2020-01-17T13:00Z	30.677	false
2020-01-17T12:45Z	30.668	false
2020-01-17T12:30Z	30.671	false
2020-01-17T12:15Z	30.686	false
2020-01-17T12:00Z	30.686	false
2020-01-17T11:45Z	30.662	false
2020-01-17T11:30Z	30.659	false
2020-01-17T11:15Z	30.699	false
2020-01-17T11:00Z	30.699	false
2020-01-17T10:45Z	30.647	false
2020-01-17T10:30Z	30.634	false
2020-01-17T10:15Z	30.659	false
2020-01-17T10:00Z	30.65	false
2020-01-17T09:45Z	30.659	false
2020-01-17T09:30Z	30.696	false
2020-01-17T09:15Z	30.711	false
2020-01-17T09:00Z	30.683	false
2020-01-17T08:45Z	30.68	false
2020-01-17T08:30Z	30.677	false
2020-01-17T08:15Z	30.671	false
2020-01-17T08:00Z	30.656	false
2020-01-17T07:45Z	30.628	false
2020-01-17T07:30Z	30.625	false
2020-01-17T07:15Z	30.647	false
2020-01-17T07:00Z	30.671	false
2020-01-17T06:45Z	30.699	false
2020-01-17T06:30Z	30.72	false
2020-01-17T06:15Z	30.692	false
2020-01-17T06:00Z	30.677	false
2020-01-17T05:45Z	30.68	false
2020-01-17T05:30Z	30.683	false
2020-01-17T05:15Z	30.68	false
2020-01-17T05:00Z	30.677	false
2020-01-17T04:45Z	30.674	false
2020-01-17T04:30Z	30.671	false
2020-01-17T04:15Z	30.668	false
2020-01-17T04:00Z	30.665	false
2020-01-17T03:45Z	30.665	false
2020-01-17T03:30Z	30.662	false
2020-01-17T03:15Z	30.662	false
2020-01-17T03:00Z	30.662	false
2020-01-17T02:45Z	30.662	false
2020-01-17T02:30Z	30.662	false
2020-01-17T02:15Z	30.662	false
2020-01-17T02:00Z	30.662	false
2020-01-17T01:45Z	30.662	false
2020-01-17T01:30Z	30.662	false
2020-01-17T01:15Z	30.659	false
2020-01-17T01:00Z	30.656	false
2020-01-17T00:45Z	30.65	false
2020-01-17T00:30Z	30.647	false
2020-01-17T00:15Z	30.638	false
2020-01-17T00:00Z	30.628	false
2020-01-16T23:45Z	30.625	false
2020-01-16T23:30Z	30.631	false
2020-01-16T23:15Z	30.644	false
2020-01-16T23:00Z	30.659	false
2020-01-16T22:45Z	30.671	false
2020-01-16T22:30Z	30.668	false
2020-01-16T22:15Z	30.644	false
2020-01-16T22:00Z	30.61	false
2020-01-16T21:45Z	30.592	false
2020-01-16T21:30Z	30.601	false
2020-01-16T21:15Z	30.622	false
2020-01-16T21:00Z	30.625	false
2020-01-16T20:45Z	30.625	false
2020-01-16T20:30Z	30.625	false
2020-01-16T20:15Z	30.622	false
2020-01-16T20:00Z	30.622	false
2020-01-16T19:45Z	30.622	false
2020-01-16T19:30Z	30.619	false
2020-01-16T19:15Z	30.625	false
2020-01-16T19:00Z	30.628	false
2020-01-16T18:45Z	30.625	false
2020-01-16T18:30Z	30.631	false
2020-01-16T18:15Z	30.634	false
2020-01-16T18:00Z	30.638	false
2020-01-16T17:45Z	30.641	false
2020-01-16T17:30Z	30.641	false
2020-01-16T17:15Z	30.638	false
2020-01-16T17:00Z	30.634	false
2020-01-16T16:45Z	30.638	false
2020-01-16T16:30Z	30.641	false
2020-01-16T16:15Z	30.644	false
2020-01-16T16:00Z	30.65	false
2020-01-16T15:45Z	30.656	false
2020-01-16T15:30Z	30.659	false
2020-01-16T15:15Z	30.665	false
2020-01-16T15:00Z	30.668	false
2020-01-16T14:45Z	30.671	false
2020-01-16T14:30Z	30.671	false
2020-01-16T14:15Z	30.668	false
2020-01-16T14:00Z	30.656	false
2020-01-16T13:45Z	30.65	false
2020-01-16T13:30Z	30.662	false
2020-01-16T13:15Z	30.662	false
2020-01-16T13:00Z	30.671	false
2020-01-16T12:45Z	30.668	false
2020-01-16T12:30Z	30.671	false
2020-01-16T12:15Z	30.671	false
2020-01-16T12:00Z	30.674	false
2020-01-16T11:45Z	30.677	false
2020-01-16T11:30Z	30.677	false
2020-01-16T11:15Z	30.677	false
2020-01-16T11:00Z	30.671	false
2020-01-16T10:45Z	30.674	false
2020-01-16T10:30Z	30.683	false
2020-01-16T10:15Z	30.692	false
2020-01-16T10:00Z	30.705	false
2020-01-16T09:45Z	30.717	false
2020-01-16T09:30Z	30.729	false
2020-01-16T09:15Z	30.726	false
2020-01-16T09:00Z	30.705	false
2020-01-16T08:45Z	30.674	false
2020-01-16T08:30Z	30.665	false
2020-01-16T08:15Z	30.692	false
2020-01-16T08:00Z	30.692	false
2020-01-16T07:45Z	30.696	false
2020-01-16T07:30Z	30.696	false
2020-01-16T07:15Z	30.702	false
2020-01-16T07:00Z	30.705	false
2020-01-16T06:45Z	30.708	false
2020-01-16T06:30Z	30.714	false
2020-01-16T06:15Z	30.717	false
2020-01-16T06:00Z	30.72	false
2020-01-16T05:45Z	30.726	false
2020-01-16T05:30Z	30.729	false
2020-01-16T05:15Z	30.732	false
2020-01-16T05:00Z	30.729	false
2020-01-16T04:45Z	30.741	false
2020-01-16T04:30Z	30.744	false
2020-01-16T04:15Z	30.747	false
2020-01-16T04:00Z	30.757	false
2020-01-16T03:45Z	30.766	false
2020-01-16T03:30Z	30.775	false
2020-01-16T03:15Z	30.784	false
2020-01-16T03:00Z	30.787	false
2020-01-16T02:45Z	30.787	false
2020-01-16T02:30Z	30.787	false
2020-01-16T02:15Z	30.79	false
2020-01-16T02:00Z	30.796	false
2020-01-16T01:45Z	30.802	false
2020-01-16T01:30Z	30.805	false
2020-01-16T01:15Z	30.808	false
2020-01-16T01:00Z	30.811	false
2020-01-16T00:45Z	30.821	false
2020-01-16T00:30Z	30.824	false
2020-01-16T00:15Z	30.824	false
2020-01-16T00:00Z	30.824	false
2020-01-15T23:45Z	30.827	false
2020-01-15T23:30Z	30.833	false
2020-01-15T23:15Z	30.836	false
2020-01-15T23:00Z	30.842	false
2020-01-15T22:45Z	30.845	false
2020-01-15T22:30Z	30.848	false
2020-01-15T22:15Z	30.857	false
2020-01-15T22:00Z	30.866	false
2020-01-15T21:45Z	30.876	false
2020-01-15T21:30Z	30.882	false
2020-01-15T21:15Z	30.891	false
2020-01-15T21:00Z	30.897	false
2020-01-15T20:45Z	30.903	false
2020-01-15T20:30Z	30.906	false
2020-01-15T20:15Z	30.909	false
2020-01-15T20:00Z	30.909	false
2020-01-15T19:45Z	30.912	false
2020-01-15T19:30Z	30.915	false
2020-01-15T19:15Z	30.915	false
2020-01-15T19:00Z	30.915	false
2020-01-15T18:45Z	30.915	false
2020-01-15T18:30Z	30.909	false
2020-01-15T18:15Z	30.9	false
2020-01-15T18:00Z	30.897	false
2020-01-15T17:45Z	30.9	false
2020-01-15T17:30Z	30.897	false
2020-01-15T17:15Z	30.903	false
2020-01-15T17:00Z	30.906	false
2020-01-15T16:45Z	30.906	false
2020-01-15T16:30Z	30.909	false
2020-01-15T16:15Z	30.912	false
2020-01-15T16:00Z	30.909	false
2020-01-15T15:45Z	30.909	false
2020-01-15T15:30Z	30.912	false
2020-01-15T15:15Z	30.912	false
2020-01-15T15:00Z	30.912	false
2020-01-15T14:45Z	30.903	false
2020-01-15T14:30Z	30.897	false
2020-01-15T14:15Z	30.891	false
2020-01-15T14:00Z	30.882	false
2020-01-15T13:45Z	30.869	false
2020-01-15T13:30Z	30.854	false
2020-01-15T13:15Z	30.848	false
2020-01-15T13:00Z	30.845	false
2020-01-15T12:45Z	30.851	false
2020-01-15T12:30Z	30.854	false
2020-01-15T12:15Z	30.857	false
2020-01-15T12:00Z	30.842	false
2020-01-15T11:45Z	30.836	false
2020-01-15T11:30Z	30.833	false
2020-01-15T11:15Z	30.836	false
2020-01-15T11:00Z	30.833	false
2020-01-15T10:45Z	30.815	false
2020-01-15T10:30Z	30.808	false
2020-01-15T10:15Z	30.802	false
2020-01-15T10:00Z	30.79	false
2020-01-15T09:45Z	30.787	false
2020-01-15T09:30Z	30.781	false
2020-01-15T09:15Z	30.775	false
2020-01-15T09:00Z	30.769	false
2020-01-15T08:45Z	30.766	false
2020-01-15T08:30Z	30.747	false
2020-01-15T08:15Z	30.738	false
2020-01-15T08:00Z	30.732	false
2020-01-15T07:45Z	30.714	false
2020-01-15T07:30Z	30.699	false

Forecast data

Key information

• Station name: Tumbling Bay Weir DS
• Station ID: 9047
• River name: Amwell Loop
• Typical range: 30.32m to 30.73m
• Highest level on record: 30.79m on 13 October 2014
• 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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