River level Amwell Loop at Tumbling Bay Weir DS

Check for flood warnings in this area

Latest recorded level 30.49m at 7:30am Tuesday 19 January 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
2021-01-19T07:30Z	30.485	false
2021-01-19T07:15Z	30.485	false
2021-01-19T07:00Z	30.482	false
2021-01-19T06:45Z	30.476	false
2021-01-19T06:30Z	30.476	false
2021-01-19T06:15Z	30.473	false
2021-01-19T06:00Z	30.47	false
2021-01-19T05:45Z	30.47	false
2021-01-19T05:30Z	30.47	false
2021-01-19T05:15Z	30.473	false
2021-01-19T05:00Z	30.479	false
2021-01-19T04:45Z	30.479	false
2021-01-19T04:30Z	30.485	false
2021-01-19T04:15Z	30.485	false
2021-01-19T04:00Z	30.485	false
2021-01-19T03:45Z	30.482	false
2021-01-19T03:30Z	30.482	false
2021-01-19T03:15Z	30.479	false
2021-01-19T03:00Z	30.476	false
2021-01-19T02:45Z	30.476	false
2021-01-19T02:30Z	30.476	false
2021-01-19T02:15Z	30.473	false
2021-01-19T02:00Z	30.473	false
2021-01-19T01:45Z	30.473	false
2021-01-19T01:30Z	30.473	false
2021-01-19T01:15Z	30.47	false
2021-01-19T01:00Z	30.47	false
2021-01-19T00:45Z	30.47	false
2021-01-19T00:30Z	30.47	false
2021-01-19T00:15Z	30.467	false
2021-01-19T00:00Z	30.464	false
2021-01-18T23:45Z	30.464	false
2021-01-18T23:30Z	30.464	false
2021-01-18T23:15Z	30.464	false
2021-01-18T23:00Z	30.467	false
2021-01-18T22:45Z	30.467	false
2021-01-18T22:30Z	30.47	false
2021-01-18T22:15Z	30.473	false
2021-01-18T22:00Z	30.473	false
2021-01-18T21:45Z	30.473	false
2021-01-18T21:30Z	30.476	false
2021-01-18T21:15Z	30.476	false
2021-01-18T21:00Z	30.479	false
2021-01-18T20:45Z	30.479	false
2021-01-18T20:30Z	30.479	false
2021-01-18T20:15Z	30.476	false
2021-01-18T20:00Z	30.479	false
2021-01-18T19:45Z	30.479	false
2021-01-18T19:30Z	30.479	false
2021-01-18T19:15Z	30.479	false
2021-01-18T19:00Z	30.479	false
2021-01-18T18:45Z	30.476	false
2021-01-18T18:30Z	30.476	false
2021-01-18T18:15Z	30.479	false
2021-01-18T18:00Z	30.476	false
2021-01-18T17:45Z	30.479	false
2021-01-18T17:30Z	30.476	false
2021-01-18T17:15Z	30.476	false
2021-01-18T17:00Z	30.479	false
2021-01-18T16:45Z	30.482	false
2021-01-18T16:30Z	30.479	false
2021-01-18T16:15Z	30.479	false
2021-01-18T16:00Z	30.479	false
2021-01-18T15:45Z	30.476	false
2021-01-18T15:30Z	30.473	false
2021-01-18T15:15Z	30.467	false
2021-01-18T15:00Z	30.464	false
2021-01-18T14:45Z	30.464	false
2021-01-18T14:30Z	30.47	false
2021-01-18T14:15Z	30.473	false
2021-01-18T14:00Z	30.479	false
2021-01-18T13:45Z	30.479	false
2021-01-18T13:30Z	30.482	false
2021-01-18T13:15Z	30.479	false
2021-01-18T13:00Z	30.473	false
2021-01-18T12:45Z	30.47	false
2021-01-18T12:30Z	30.464	false
2021-01-18T12:15Z	30.467	false
2021-01-18T12:00Z	30.482	false
2021-01-18T11:45Z	30.482	false
2021-01-18T11:30Z	30.47	false
2021-01-18T11:15Z	30.47	false
2021-01-18T11:00Z	30.482	false
2021-01-18T10:45Z	30.488	false
2021-01-18T10:30Z	30.482	false
2021-01-18T10:15Z	30.47	false
2021-01-18T10:00Z	30.467	false
2021-01-18T09:45Z	30.479	false
2021-01-18T09:30Z	30.479	false
2021-01-18T09:15Z	30.476	false
2021-01-18T09:00Z	30.482	false
2021-01-18T08:45Z	30.476	false
2021-01-18T08:30Z	30.482	false
2021-01-18T08:15Z	30.488	false
2021-01-18T08:00Z	30.491	false
2021-01-18T07:45Z	30.488	false
2021-01-18T07:30Z	30.479	false
2021-01-18T07:15Z	30.47	false
2021-01-18T07:00Z	30.473	false
2021-01-18T06:45Z	30.482	false
2021-01-18T06:30Z	30.497	false
2021-01-18T06:15Z	30.491	false
2021-01-18T06:00Z	30.464	false
2021-01-18T05:45Z	30.47	false
2021-01-18T05:30Z	30.479	false
2021-01-18T05:15Z	30.479	false
2021-01-18T05:00Z	30.485	false
2021-01-18T04:45Z	30.488	false
2021-01-18T04:30Z	30.491	false
2021-01-18T04:15Z	30.491	false
2021-01-18T04:00Z	30.491	false
2021-01-18T03:45Z	30.485	false
2021-01-18T03:30Z	30.485	false
2021-01-18T03:15Z	30.482	false
2021-01-18T03:00Z	30.482	false
2021-01-18T02:45Z	30.485	false
2021-01-18T02:30Z	30.488	false
2021-01-18T02:15Z	30.488	false
2021-01-18T02:00Z	30.488	false
2021-01-18T01:45Z	30.488	false
2021-01-18T01:30Z	30.488	false
2021-01-18T01:15Z	30.488	false
2021-01-18T01:00Z	30.491	false
2021-01-18T00:45Z	30.491	false
2021-01-18T00:30Z	30.497	false
2021-01-18T00:15Z	30.497	false
2021-01-18T00:00Z	30.5	false
2021-01-17T23:45Z	30.503	false
2021-01-17T23:30Z	30.503	false
2021-01-17T23:15Z	30.5	false
2021-01-17T23:00Z	30.497	false
2021-01-17T22:45Z	30.5	false
2021-01-17T22:30Z	30.506	false
2021-01-17T22:15Z	30.512	false
2021-01-17T22:00Z	30.519	false
2021-01-17T21:45Z	30.519	false
2021-01-17T21:30Z	30.519	false
2021-01-17T21:15Z	30.515	false
2021-01-17T21:00Z	30.512	false
2021-01-17T20:45Z	30.506	false
2021-01-17T20:30Z	30.506	false
2021-01-17T20:15Z	30.512	false
2021-01-17T20:00Z	30.515	false
2021-01-17T19:45Z	30.519	false
2021-01-17T19:30Z	30.519	false
2021-01-17T19:15Z	30.519	false
2021-01-17T19:00Z	30.515	false
2021-01-17T18:45Z	30.519	false
2021-01-17T18:30Z	30.522	false
2021-01-17T18:15Z	30.525	false
2021-01-17T18:00Z	30.528	false
2021-01-17T17:45Z	30.537	false
2021-01-17T17:30Z	30.531	false
2021-01-17T17:15Z	30.525	false
2021-01-17T17:00Z	30.531	false
2021-01-17T16:45Z	30.54	false
2021-01-17T16:30Z	30.534	false
2021-01-17T16:15Z	30.537	false
2021-01-17T16:00Z	30.54	false
2021-01-17T15:45Z	30.537	false
2021-01-17T15:30Z	30.54	false
2021-01-17T15:15Z	30.546	false
2021-01-17T15:00Z	30.546	false
2021-01-17T14:45Z	30.549	false
2021-01-17T14:30Z	30.543	false
2021-01-17T14:15Z	30.543	false
2021-01-17T14:00Z	30.543	false
2021-01-17T13:45Z	30.555	false
2021-01-17T13:30Z	30.561	false
2021-01-17T13:15Z	30.564	false
2021-01-17T13:00Z	30.564	false
2021-01-17T12:45Z	30.561	false
2021-01-17T12:30Z	30.555	false
2021-01-17T12:15Z	30.552	false
2021-01-17T12:00Z	30.558	false
2021-01-17T11:45Z	30.558	false
2021-01-17T11:30Z	30.561	false
2021-01-17T11:15Z	30.567	false
2021-01-17T11:00Z	30.567	false
2021-01-17T10:45Z	30.57	false
2021-01-17T10:30Z	30.576	false
2021-01-17T10:15Z	30.58	false
2021-01-17T10:00Z	30.583	false
2021-01-17T09:45Z	30.586	false
2021-01-17T09:30Z	30.589	false
2021-01-17T09:15Z	30.595	false
2021-01-17T09:00Z	30.598	false
2021-01-17T08:45Z	30.61	false
2021-01-17T08:30Z	30.613	false
2021-01-17T08:15Z	30.61	false
2021-01-17T08:00Z	30.61	false
2021-01-17T07:45Z	30.61	false
2021-01-17T07:30Z	30.613	false
2021-01-17T07:15Z	30.613	false
2021-01-17T07:00Z	30.619	false
2021-01-17T06:45Z	30.622	false
2021-01-17T06:30Z	30.622	false
2021-01-17T06:15Z	30.625	false
2021-01-17T06:00Z	30.628	false
2021-01-17T05:45Z	30.628	false
2021-01-17T05:30Z	30.631	false
2021-01-17T05:15Z	30.634	false
2021-01-17T05:00Z	30.638	false
2021-01-17T04:45Z	30.641	false
2021-01-17T04:30Z	30.647	false
2021-01-17T04:15Z	30.65	false
2021-01-17T04:00Z	30.653	false
2021-01-17T03:45Z	30.656	false
2021-01-17T03:30Z	30.656	false
2021-01-17T03:15Z	30.65	false
2021-01-17T03:00Z	30.647	false
2021-01-17T02:45Z	30.65	false
2021-01-17T02:30Z	30.653	false
2021-01-17T02:15Z	30.656	false
2021-01-17T02:00Z	30.662	false
2021-01-17T01:45Z	30.662	false
2021-01-17T01:30Z	30.668	false
2021-01-17T01:15Z	30.665	false
2021-01-17T01:00Z	30.668	false
2021-01-17T00:45Z	30.665	false
2021-01-17T00:30Z	30.665	false
2021-01-17T00:15Z	30.665	false
2021-01-17T00:00Z	30.662	false
2021-01-16T23:45Z	30.662	false
2021-01-16T23:30Z	30.659	false
2021-01-16T23:15Z	30.659	false
2021-01-16T23:00Z	30.659	false
2021-01-16T22:45Z	30.659	false
2021-01-16T22:30Z	30.662	false
2021-01-16T22:15Z	30.659	false
2021-01-16T22:00Z	30.659	false
2021-01-16T21:45Z	30.656	false
2021-01-16T21:30Z	30.653	false
2021-01-16T21:15Z	30.65	false
2021-01-16T21:00Z	30.65	false
2021-01-16T20:45Z	30.641	false
2021-01-16T20:30Z	30.638	false
2021-01-16T20:15Z	30.638	false
2021-01-16T20:00Z	30.631	false
2021-01-16T19:45Z	30.628	false
2021-01-16T19:30Z	30.628	false
2021-01-16T19:15Z	30.625	false
2021-01-16T19:00Z	30.622	false
2021-01-16T18:45Z	30.622	false
2021-01-16T18:30Z	30.619	false
2021-01-16T18:15Z	30.613	false
2021-01-16T18:00Z	30.613	false
2021-01-16T17:45Z	30.61	false
2021-01-16T17:30Z	30.604	false
2021-01-16T17:15Z	30.601	false
2021-01-16T17:00Z	30.598	false
2021-01-16T16:45Z	30.592	false
2021-01-16T16:30Z	30.583	false
2021-01-16T16:15Z	30.586	false
2021-01-16T16:00Z	30.592	false
2021-01-16T15:45Z	30.589	false
2021-01-16T15:30Z	30.583	false
2021-01-16T15:15Z	30.576	false
2021-01-16T15:00Z	30.57	false
2021-01-16T14:45Z	30.567	false
2021-01-16T14:30Z	30.564	false
2021-01-16T14:15Z	30.564	false
2021-01-16T14:00Z	30.558	false
2021-01-16T13:45Z	30.54	false
2021-01-16T13:30Z	30.546	false
2021-01-16T13:15Z	30.558	false
2021-01-16T13:00Z	30.549	false
2021-01-16T12:45Z	30.543	false
2021-01-16T12:30Z	30.537	false
2021-01-16T12:15Z	30.534	false
2021-01-16T12:00Z	30.54	false
2021-01-16T11:45Z	30.543	false
2021-01-16T11:30Z	30.537	false
2021-01-16T11:15Z	30.531	false
2021-01-16T11:00Z	30.534	false
2021-01-16T10:45Z	30.537	false
2021-01-16T10:30Z	30.534	false
2021-01-16T10:15Z	30.54	false
2021-01-16T10:00Z	30.549	false
2021-01-16T09:45Z	30.552	false
2021-01-16T09:30Z	30.549	false
2021-01-16T09:15Z	30.54	false
2021-01-16T09:00Z	30.531	false
2021-01-16T08:45Z	30.519	false
2021-01-16T08:30Z	30.512	false
2021-01-16T08:15Z	30.506	false
2021-01-16T08:00Z	30.506	false
2021-01-16T07:45Z	30.506	false
2021-01-16T07:30Z	30.503	false
2021-01-16T07:15Z	30.509	false
2021-01-16T07:00Z	30.515	false
2021-01-16T06:45Z	30.519	false
2021-01-16T06:30Z	30.522	false
2021-01-16T06:15Z	30.515	false
2021-01-16T06:00Z	30.512	false
2021-01-16T05:45Z	30.519	false
2021-01-16T05:30Z	30.531	false
2021-01-16T05:15Z	30.537	false
2021-01-16T05:00Z	30.531	false
2021-01-16T04:45Z	30.525	false
2021-01-16T04:30Z	30.531	false
2021-01-16T04:15Z	30.537	false
2021-01-16T04:00Z	30.537	false
2021-01-16T03:45Z	30.531	false
2021-01-16T03:30Z	30.531	false
2021-01-16T03:15Z	30.534	false
2021-01-16T03:00Z	30.537	false
2021-01-16T02:45Z	30.543	false
2021-01-16T02:30Z	30.552	false
2021-01-16T02:15Z	30.552	false
2021-01-16T02:00Z	30.543	false
2021-01-16T01:45Z	30.531	false
2021-01-16T01:30Z	30.546	false
2021-01-16T01:15Z	30.543	false
2021-01-16T01:00Z	30.546	false
2021-01-16T00:45Z	30.546	false
2021-01-16T00:30Z	30.549	false
2021-01-16T00:15Z	30.552	false
2021-01-16T00:00Z	30.552	false
2021-01-15T23:45Z	30.555	false
2021-01-15T23:30Z	30.558	false
2021-01-15T23:15Z	30.558	false
2021-01-15T23:00Z	30.561	false
2021-01-15T22:45Z	30.561	false
2021-01-15T22:30Z	30.567	false
2021-01-15T22:15Z	30.573	false
2021-01-15T22:00Z	30.573	false
2021-01-15T21:45Z	30.573	false
2021-01-15T21:30Z	30.58	false
2021-01-15T21:15Z	30.58	false
2021-01-15T21:00Z	30.58	false
2021-01-15T20:45Z	30.586	false
2021-01-15T20:30Z	30.592	false
2021-01-15T20:15Z	30.589	false
2021-01-15T20:00Z	30.595	false
2021-01-15T19:45Z	30.601	false
2021-01-15T19:30Z	30.604	false
2021-01-15T19:15Z	30.604	false
2021-01-15T19:00Z	30.61	false
2021-01-15T18:45Z	30.616	false
2021-01-15T18:30Z	30.619	false
2021-01-15T18:15Z	30.625	false
2021-01-15T18:00Z	30.634	false
2021-01-15T17:45Z	30.638	false
2021-01-15T17:30Z	30.65	false
2021-01-15T17:15Z	30.656	false
2021-01-15T17:00Z	30.662	false
2021-01-15T16:45Z	30.671	false
2021-01-15T16:30Z	30.68	false
2021-01-15T16:15Z	30.683	false
2021-01-15T16:00Z	30.692	false
2021-01-15T15:45Z	30.702	false
2021-01-15T15:30Z	30.714	false
2021-01-15T15:15Z	30.717	false
2021-01-15T15:00Z	30.726	false
2021-01-15T14:45Z	30.738	false
2021-01-15T14:30Z	30.747	false
2021-01-15T14:15Z	30.76	false
2021-01-15T14:00Z	30.769	false
2021-01-15T13:45Z	30.781	false
2021-01-15T13:30Z	30.793	false
2021-01-15T13:15Z	30.805	false
2021-01-15T13:00Z	30.818	false
2021-01-15T12:45Z	30.827	false
2021-01-15T12:30Z	30.839	false
2021-01-15T12:15Z	30.848	false
2021-01-15T12:00Z	30.857	false
2021-01-15T11:45Z	30.866	false
2021-01-15T11:30Z	30.879	false
2021-01-15T11:15Z	30.888	false
2021-01-15T11:00Z	30.9	false
2021-01-15T10:45Z	30.906	false
2021-01-15T10:30Z	30.918	false
2021-01-15T10:15Z	30.934	false
2021-01-15T10:00Z	30.946	false
2021-01-15T09:45Z	30.964	false
2021-01-15T09:30Z	30.973	false
2021-01-15T09:15Z	30.985	false
2021-01-15T09:00Z	30.998	false
2021-01-15T08:45Z	31.004	false
2021-01-15T08:30Z	31.013	false
2021-01-15T08:15Z	31.025	false
2021-01-15T08:00Z	31.04	false
2021-01-15T07:45Z	31.053	false
2021-01-15T07:30Z	31.062	false
2021-01-15T07:15Z	31.077	false
2021-01-15T07:00Z	31.092	false
2021-01-15T06:45Z	31.111	false
2021-01-15T06:30Z	31.123	false
2021-01-15T06:15Z	31.138	false
2021-01-15T06:00Z	31.153	false
2021-01-15T05:45Z	31.172	false
2021-01-15T05:30Z	31.181	false
2021-01-15T05:15Z	31.199	false
2021-01-15T05:00Z	31.214	false
2021-01-15T04:45Z	31.239	false
2021-01-15T04:30Z	31.263	false
2021-01-15T04:15Z	31.288	false
2021-01-15T04:00Z	31.324	false
2021-01-15T03:45Z	31.352	false
2021-01-15T03:30Z	31.367	false
2021-01-15T03:15Z	31.346	false
2021-01-15T03:00Z	31.339	false
2021-01-15T02:45Z	31.355	false
2021-01-15T02:30Z	31.37	false
2021-01-15T02:15Z	31.422	false
2021-01-15T02:00Z	31.379	false
2021-01-15T01:45Z	31.367	false
2021-01-15T01:30Z	31.355	false
2021-01-15T01:15Z	31.339	false
2021-01-15T01:00Z	31.33	false
2021-01-15T00:45Z	31.33	false
2021-01-15T00:30Z	31.303	false
2021-01-15T00:15Z	31.257	false
2021-01-15T00:00Z	31.242	false
2021-01-14T23:45Z	31.227	false
2021-01-14T23:30Z	31.208	false
2021-01-14T23:15Z	31.196	false
2021-01-14T23:00Z	31.187	false
2021-01-14T22:45Z	31.175	false
2021-01-14T22:30Z	31.169	false
2021-01-14T22:15Z	31.156	false
2021-01-14T22:00Z	31.15	false
2021-01-14T21:45Z	31.144	false
2021-01-14T21:30Z	31.141	false
2021-01-14T21:15Z	31.138	false
2021-01-14T21:00Z	31.132	false
2021-01-14T20:45Z	31.129	false
2021-01-14T20:30Z	31.126	false
2021-01-14T20:15Z	31.126	false
2021-01-14T20:00Z	31.123	false
2021-01-14T19:45Z	31.117	false
2021-01-14T19:30Z	31.12	false
2021-01-14T19:15Z	31.123	false
2021-01-14T19:00Z	31.114	false
2021-01-14T18:45Z	31.104	false
2021-01-14T18:30Z	31.089	false
2021-01-14T18:15Z	31.089	false
2021-01-14T18:00Z	31.074	false
2021-01-14T17:45Z	31.065	false
2021-01-14T17:30Z	31.059	false
2021-01-14T17:15Z	31.056	false
2021-01-14T17:00Z	31.046	false
2021-01-14T16:45Z	31.034	false
2021-01-14T16:30Z	31.028	false
2021-01-14T16:15Z	31.022	false
2021-01-14T16:00Z	31.01	false
2021-01-14T15:45Z	31.001	false
2021-01-14T15:30Z	30.988	false
2021-01-14T15:15Z	30.973	false
2021-01-14T15:00Z	30.97	false
2021-01-14T14:45Z	30.985	false
2021-01-14T14:30Z	31.016	false
2021-01-14T14:15Z	31.013	false
2021-01-14T14:00Z	31.004	false
2021-01-14T13:45Z	31.004	false
2021-01-14T13:30Z	31.004	false
2021-01-14T13:15Z	31.001	false
2021-01-14T13:00Z	30.988	false
2021-01-14T12:45Z	30.973	false
2021-01-14T12:30Z	30.955	false
2021-01-14T12:15Z	30.943	false
2021-01-14T12:00Z	30.937	false
2021-01-14T11:45Z	30.927	false
2021-01-14T11:30Z	30.909	false
2021-01-14T11:15Z	30.894	false
2021-01-14T11:00Z	30.888	false
2021-01-14T10:45Z	30.885	false
2021-01-14T10:30Z	30.879	false
2021-01-14T10:15Z	30.866	false
2021-01-14T10:00Z	30.854	false
2021-01-14T09:45Z	30.845	false
2021-01-14T09:30Z	30.833	false
2021-01-14T09:15Z	30.815	false
2021-01-14T09:00Z	30.802	false
2021-01-14T08:45Z	30.793	false
2021-01-14T08:30Z	30.775	false
2021-01-14T08:15Z	30.757	false
2021-01-14T08:00Z	30.754	false
2021-01-14T07:45Z	30.732	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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