River level River Alne at Henley River

Check for flood warnings in this area

Latest recorded level 0.45m at 10:00pm Tuesday 19 March 2019.

River levels at this location in the last 5 days

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• Measured level
• When the water level reaches 0.55m 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
2019-03-19T22:00Z	0.448	false
2019-03-19T21:45Z	0.448	false
2019-03-19T21:30Z	0.448	false
2019-03-19T21:15Z	0.448	false
2019-03-19T21:00Z	0.448	false
2019-03-19T20:45Z	0.448	false
2019-03-19T20:30Z	0.449	false
2019-03-19T20:15Z	0.448	false
2019-03-19T20:00Z	0.448	false
2019-03-19T19:45Z	0.448	false
2019-03-19T19:30Z	0.449	false
2019-03-19T19:15Z	0.448	false
2019-03-19T19:00Z	0.448	false
2019-03-19T18:45Z	0.448	false
2019-03-19T18:30Z	0.449	false
2019-03-19T18:15Z	0.449	false
2019-03-19T10:00Z	0.452	false
2019-03-19T09:45Z	0.452	false
2019-03-19T09:30Z	0.452	false
2019-03-19T09:15Z	0.452	false
2019-03-19T09:00Z	0.452	false
2019-03-19T08:45Z	0.452	false
2019-03-19T08:30Z	0.453	false
2019-03-19T08:15Z	0.453	false
2019-03-19T08:00Z	0.453	false
2019-03-19T07:45Z	0.453	false
2019-03-19T07:30Z	0.453	false
2019-03-19T07:15Z	0.453	false
2019-03-19T07:00Z	0.454	false
2019-03-19T06:45Z	0.453	false
2019-03-19T06:30Z	0.453	false
2019-03-19T06:15Z	0.453	false
2019-03-19T06:00Z	0.453	false
2019-03-19T05:45Z	0.454	false
2019-03-19T05:30Z	0.454	false
2019-03-19T05:15Z	0.455	false
2019-03-19T05:00Z	0.455	false
2019-03-19T04:45Z	0.454	false
2019-03-19T04:30Z	0.455	false
2019-03-19T04:15Z	0.455	false
2019-03-19T04:00Z	0.455	false
2019-03-19T03:45Z	0.455	false
2019-03-19T03:30Z	0.455	false
2019-03-19T03:15Z	0.454	false
2019-03-19T03:00Z	0.455	false
2019-03-19T02:45Z	0.455	false
2019-03-19T02:30Z	0.455	false
2019-03-19T02:15Z	0.456	false
2019-03-19T02:00Z	0.455	false
2019-03-19T01:45Z	0.455	false
2019-03-19T01:30Z	0.456	false
2019-03-19T01:15Z	0.456	false
2019-03-19T01:00Z	0.456	false
2019-03-19T00:45Z	0.456	false
2019-03-19T00:30Z	0.457	false
2019-03-19T00:15Z	0.456	false
2019-03-19T00:00Z	0.456	false
2019-03-18T23:45Z	0.456	false
2019-03-18T23:30Z	0.457	false
2019-03-18T23:15Z	0.457	false
2019-03-18T23:00Z	0.456	false
2019-03-18T22:45Z	0.457	false
2019-03-18T22:30Z	0.457	false
2019-03-18T22:15Z	0.457	false
2019-03-18T22:00Z	0.457	false
2019-03-18T21:45Z	0.457	false
2019-03-18T21:30Z	0.458	false
2019-03-18T21:15Z	0.457	false
2019-03-18T21:00Z	0.457	false
2019-03-18T20:45Z	0.458	false
2019-03-18T20:30Z	0.458	false
2019-03-18T20:15Z	0.458	false
2019-03-18T20:00Z	0.458	false
2019-03-18T19:45Z	0.458	false
2019-03-18T19:30Z	0.458	false
2019-03-18T19:15Z	0.459	false
2019-03-18T19:00Z	0.459	false
2019-03-18T18:45Z	0.459	false
2019-03-18T18:30Z	0.459	false
2019-03-18T18:15Z	0.46	false
2019-03-18T18:00Z	0.46	false
2019-03-18T17:45Z	0.46	false
2019-03-18T17:30Z	0.459	false
2019-03-18T17:15Z	0.46	false
2019-03-18T17:00Z	0.46	false
2019-03-18T16:45Z	0.46	false
2019-03-18T16:30Z	0.461	false
2019-03-18T16:15Z	0.461	false
2019-03-18T16:00Z	0.46	false
2019-03-18T15:45Z	0.46	false
2019-03-18T15:30Z	0.46	false
2019-03-18T15:15Z	0.46	false
2019-03-18T15:00Z	0.46	false
2019-03-18T14:45Z	0.461	false
2019-03-18T14:30Z	0.461	false
2019-03-18T14:15Z	0.461	false
2019-03-18T13:00Z	0.463	false
2019-03-18T12:45Z	0.462	false
2019-03-18T12:30Z	0.462	false
2019-03-18T12:15Z	0.463	false
2019-03-18T12:00Z	0.462	false
2019-03-18T11:45Z	0.463	false
2019-03-18T11:30Z	0.463	false
2019-03-18T11:15Z	0.463	false
2019-03-18T11:00Z	0.464	false
2019-03-18T10:45Z	0.463	false
2019-03-18T10:30Z	0.464	false
2019-03-18T10:15Z	0.464	false
2019-03-18T10:00Z	0.464	false
2019-03-18T09:45Z	0.464	false
2019-03-18T09:30Z	0.464	false
2019-03-18T09:15Z	0.465	false
2019-03-18T09:00Z	0.465	false
2019-03-18T08:45Z	0.465	false
2019-03-18T08:30Z	0.465	false
2019-03-18T08:15Z	0.465	false
2019-03-18T08:00Z	0.465	false
2019-03-18T07:45Z	0.466	false
2019-03-18T07:30Z	0.466	false
2019-03-18T07:15Z	0.466	false
2019-03-18T07:00Z	0.467	false
2019-03-18T06:45Z	0.467	false
2019-03-18T06:30Z	0.466	false
2019-03-18T06:15Z	0.468	false
2019-03-18T06:00Z	0.467	false
2019-03-18T05:45Z	0.468	false
2019-03-18T05:30Z	0.468	false
2019-03-18T05:15Z	0.469	false
2019-03-18T05:00Z	0.469	false
2019-03-18T04:45Z	0.469	false
2019-03-18T04:30Z	0.469	false
2019-03-18T04:15Z	0.47	false
2019-03-18T04:00Z	0.47	false
2019-03-18T03:45Z	0.469	false
2019-03-18T03:30Z	0.47	false
2019-03-18T03:15Z	0.471	false
2019-03-18T03:00Z	0.47	false
2019-03-18T02:45Z	0.471	false
2019-03-18T02:30Z	0.471	false
2019-03-18T02:15Z	0.472	false
2019-03-18T02:00Z	0.471	false
2019-03-18T01:45Z	0.472	false
2019-03-18T01:30Z	0.472	false
2019-03-18T01:15Z	0.473	false
2019-03-18T01:00Z	0.473	false
2019-03-18T00:45Z	0.473	false
2019-03-18T00:30Z	0.473	false
2019-03-18T00:15Z	0.474	false
2019-03-18T00:00Z	0.475	false
2019-03-17T23:45Z	0.474	false
2019-03-17T23:30Z	0.475	false
2019-03-17T23:15Z	0.476	false
2019-03-17T23:00Z	0.475	false
2019-03-17T22:45Z	0.476	false
2019-03-17T22:30Z	0.476	false
2019-03-17T22:15Z	0.476	false
2019-03-17T22:00Z	0.477	false
2019-03-17T21:45Z	0.477	false
2019-03-17T21:30Z	0.477	false
2019-03-17T21:15Z	0.477	false
2019-03-17T21:00Z	0.478	false
2019-03-17T20:45Z	0.479	false
2019-03-17T20:30Z	0.478	false
2019-03-17T20:15Z	0.479	false
2019-03-17T20:00Z	0.479	false
2019-03-17T19:45Z	0.481	false
2019-03-17T19:30Z	0.481	false
2019-03-17T19:15Z	0.482	false
2019-03-17T19:00Z	0.481	false
2019-03-17T18:45Z	0.481	false
2019-03-17T18:30Z	0.482	false
2019-03-17T18:15Z	0.482	false
2019-03-17T18:00Z	0.482	false
2019-03-17T17:45Z	0.483	false
2019-03-17T17:30Z	0.483	false
2019-03-17T17:15Z	0.483	false
2019-03-17T17:00Z	0.483	false
2019-03-17T16:45Z	0.484	false
2019-03-17T16:30Z	0.484	false
2019-03-17T16:15Z	0.483	false
2019-03-17T16:00Z	0.484	false
2019-03-17T15:45Z	0.484	false
2019-03-17T15:30Z	0.485	false
2019-03-17T15:15Z	0.485	false
2019-03-17T15:00Z	0.485	false
2019-03-17T14:45Z	0.486	false
2019-03-17T14:30Z	0.486	false
2019-03-17T14:15Z	0.486	false
2019-03-17T14:00Z	0.486	false
2019-03-17T13:45Z	0.487	false
2019-03-17T13:30Z	0.488	false
2019-03-17T13:15Z	0.488	false
2019-03-17T13:00Z	0.488	false
2019-03-17T12:45Z	0.489	false
2019-03-17T12:30Z	0.49	false
2019-03-17T12:15Z	0.49	false
2019-03-17T12:00Z	0.49	false
2019-03-17T11:45Z	0.491	false
2019-03-17T11:30Z	0.491	false
2019-03-17T11:15Z	0.493	false
2019-03-17T11:00Z	0.491	false
2019-03-17T10:45Z	0.494	false
2019-03-17T10:30Z	0.494	false
2019-03-17T10:15Z	0.495	false
2019-03-17T10:00Z	0.497	false
2019-03-17T09:45Z	0.496	false
2019-03-17T09:30Z	0.496	false
2019-03-17T09:15Z	0.498	false
2019-03-17T09:00Z	0.498	false
2019-03-17T08:45Z	0.5	false
2019-03-17T08:30Z	0.5	false
2019-03-17T08:15Z	0.5	false
2019-03-17T08:00Z	0.501	false
2019-03-17T07:45Z	0.501	false
2019-03-17T07:30Z	0.503	false
2019-03-17T07:15Z	0.503	false
2019-03-17T07:00Z	0.504	false
2019-03-17T06:45Z	0.505	false
2019-03-17T06:30Z	0.505	false
2019-03-17T06:15Z	0.505	false
2019-03-17T06:00Z	0.507	false
2019-03-17T05:45Z	0.507	false
2019-03-17T05:30Z	0.509	false
2019-03-17T05:15Z	0.509	false
2019-03-17T05:00Z	0.511	false
2019-03-17T04:45Z	0.511	false
2019-03-17T04:30Z	0.513	false
2019-03-17T04:15Z	0.512	false
2019-03-17T04:00Z	0.513	false
2019-03-17T03:45Z	0.513	false
2019-03-17T03:30Z	0.515	false
2019-03-17T03:15Z	0.516	false
2019-03-17T03:00Z	0.517	false
2019-03-17T02:45Z	0.517	false
2019-03-17T02:30Z	0.518	false
2019-03-17T02:15Z	0.519	false
2019-03-17T02:00Z	0.518	false
2019-03-17T01:45Z	0.519	false
2019-03-17T01:30Z	0.519	false
2019-03-17T01:15Z	0.521	false
2019-03-17T01:00Z	0.52	false
2019-03-17T00:45Z	0.52	false
2019-03-17T00:30Z	0.518	false
2019-03-17T00:15Z	0.517	false
2019-03-17T00:00Z	0.514	false
2019-03-16T23:45Z	0.513	false
2019-03-16T23:30Z	0.51	false
2019-03-16T23:15Z	0.509	false
2019-03-16T23:00Z	0.505	false
2019-03-16T22:45Z	0.502	false
2019-03-16T22:30Z	0.497	false
2019-03-16T22:15Z	0.492	false
2019-03-16T22:00Z	0.488	false
2019-03-16T21:45Z	0.484	false
2019-03-16T21:30Z	0.482	false
2019-03-16T21:15Z	0.479	false
2019-03-16T21:00Z	0.478	false
2019-03-16T20:45Z	0.476	false
2019-03-16T20:30Z	0.474	false
2019-03-16T20:15Z	0.474	false
2019-03-16T20:00Z	0.474	false
2019-03-16T19:45Z	0.474	false
2019-03-16T19:30Z	0.472	false
2019-03-16T19:15Z	0.471	false
2019-03-16T19:00Z	0.47	false
2019-03-16T18:45Z	0.468	false
2019-03-16T18:30Z	0.468	false
2019-03-16T18:15Z	0.467	false
2019-03-16T18:00Z	0.467	false
2019-03-16T17:45Z	0.467	false
2019-03-16T17:30Z	0.468	false
2019-03-16T17:15Z	0.467	false
2019-03-16T17:00Z	0.467	false
2019-03-16T16:45Z	0.467	false
2019-03-16T16:30Z	0.468	false
2019-03-16T16:15Z	0.468	false
2019-03-16T16:00Z	0.468	false
2019-03-16T15:45Z	0.467	false
2019-03-16T15:30Z	0.468	false
2019-03-16T15:15Z	0.469	false
2019-03-16T15:00Z	0.468	false
2019-03-16T14:45Z	0.468	false
2019-03-16T14:30Z	0.469	false
2019-03-16T14:15Z	0.469	false
2019-03-16T14:00Z	0.469	false
2019-03-16T13:45Z	0.47	false
2019-03-16T13:30Z	0.47	false
2019-03-16T13:15Z	0.47	false
2019-03-16T13:00Z	0.47	false
2019-03-16T12:45Z	0.472	false
2019-03-16T12:30Z	0.471	false
2019-03-16T12:15Z	0.47	false
2019-03-16T12:00Z	0.471	false
2019-03-16T11:45Z	0.472	false
2019-03-16T11:30Z	0.47	false
2019-03-16T11:15Z	0.472	false
2019-03-16T11:00Z	0.472	false
2019-03-16T10:45Z	0.473	false
2019-03-16T10:30Z	0.472	false
2019-03-16T10:15Z	0.472	false
2019-03-16T10:00Z	0.473	false
2019-03-16T09:45Z	0.472	false
2019-03-16T09:30Z	0.472	false
2019-03-16T09:15Z	0.473	false
2019-03-16T09:00Z	0.473	false
2019-03-16T08:45Z	0.472	false
2019-03-16T08:30Z	0.472	false
2019-03-16T08:15Z	0.471	false
2019-03-16T08:00Z	0.471	false
2019-03-16T07:45Z	0.471	false
2019-03-16T07:30Z	0.471	false
2019-03-16T07:15Z	0.471	false
2019-03-16T07:00Z	0.47	false
2019-03-16T06:45Z	0.47	false
2019-03-16T06:30Z	0.469	false
2019-03-16T06:15Z	0.469	false
2019-03-16T06:00Z	0.468	false
2019-03-16T05:45Z	0.468	false
2019-03-16T05:30Z	0.467	false
2019-03-16T05:15Z	0.467	false
2019-03-16T05:00Z	0.466	false
2019-03-16T04:45Z	0.465	false
2019-03-16T04:30Z	0.464	false
2019-03-16T04:15Z	0.464	false
2019-03-16T04:00Z	0.464	false
2019-03-16T03:45Z	0.464	false
2019-03-16T03:30Z	0.463	false
2019-03-16T03:15Z	0.463	false
2019-03-16T03:00Z	0.462	false
2019-03-16T02:45Z	0.462	false
2019-03-16T02:30Z	0.462	false
2019-03-16T02:15Z	0.463	false
2019-03-16T02:00Z	0.461	false
2019-03-16T01:45Z	0.462	false
2019-03-16T01:30Z	0.461	false
2019-03-16T01:15Z	0.461	false
2019-03-16T01:00Z	0.46	false
2019-03-16T00:45Z	0.46	false
2019-03-16T00:30Z	0.46	false
2019-03-16T00:15Z	0.459	false
2019-03-16T00:00Z	0.459	false
2019-03-15T23:45Z	0.46	false
2019-03-15T23:30Z	0.46	false
2019-03-15T23:15Z	0.459	false
2019-03-15T23:00Z	0.46	false
2019-03-15T22:45Z	0.459	false
2019-03-15T22:30Z	0.46	false
2019-03-15T22:15Z	0.46	false
2019-03-15T22:00Z	0.46	false
2019-03-15T21:45Z	0.46	false
2019-03-15T21:30Z	0.46	false
2019-03-15T21:15Z	0.461	false
2019-03-15T21:00Z	0.461	false
2019-03-15T20:45Z	0.462	false
2019-03-15T20:30Z	0.462	false
2019-03-15T20:15Z	0.462	false
2019-03-15T20:00Z	0.462	false
2019-03-15T19:45Z	0.463	false
2019-03-15T19:30Z	0.462	false
2019-03-15T19:15Z	0.463	false
2019-03-15T19:00Z	0.464	false
2019-03-15T18:45Z	0.463	false
2019-03-15T18:30Z	0.464	false
2019-03-15T18:15Z	0.464	false
2019-03-15T18:00Z	0.464	false
2019-03-15T17:45Z	0.465	false
2019-03-15T17:30Z	0.464	false
2019-03-15T17:15Z	0.465	false
2019-03-15T17:00Z	0.465	false
2019-03-15T16:45Z	0.465	false
2019-03-15T16:30Z	0.465	false
2019-03-15T16:15Z	0.466	false
2019-03-15T16:00Z	0.466	false
2019-03-15T15:45Z	0.466	false
2019-03-15T15:30Z	0.466	false
2019-03-15T15:15Z	0.467	false
2019-03-15T15:00Z	0.466	false
2019-03-15T14:45Z	0.466	false
2019-03-15T14:30Z	0.466	false
2019-03-15T14:15Z	0.466	false
2019-03-15T14:00Z	0.466	false
2019-03-15T13:45Z	0.466	false
2019-03-15T13:30Z	0.466	false
2019-03-15T13:15Z	0.466	false
2019-03-15T13:00Z	0.467	false
2019-03-15T12:45Z	0.466	false
2019-03-15T12:30Z	0.466	false
2019-03-15T12:15Z	0.465	false
2019-03-15T12:00Z	0.467	false
2019-03-15T11:45Z	0.467	false
2019-03-15T11:30Z	0.467	false
2019-03-15T11:15Z	0.467	false
2019-03-15T11:00Z	0.467	false
2019-03-15T10:45Z	0.468	false
2019-03-15T10:30Z	0.469	false
2019-03-15T10:15Z	0.468	false
2019-03-15T10:00Z	0.469	false
2019-03-15T09:45Z	0.467	false
2019-03-15T09:30Z	0.468	false
2019-03-15T09:15Z	0.467	false
2019-03-15T09:00Z	0.468	false
2019-03-15T08:45Z	0.468	false
2019-03-15T08:30Z	0.468	false
2019-03-15T08:15Z	0.469	false
2019-03-15T08:00Z	0.469	false
2019-03-15T07:45Z	0.469	false
2019-03-15T07:30Z	0.469	false
2019-03-15T07:15Z	0.47	false
2019-03-15T07:00Z	0.469	false
2019-03-15T06:45Z	0.469	false
2019-03-15T06:30Z	0.47	false
2019-03-15T06:15Z	0.469	false
2019-03-15T06:00Z	0.47	false
2019-03-15T05:45Z	0.47	false
2019-03-15T05:30Z	0.47	false
2019-03-15T05:15Z	0.47	false
2019-03-15T05:00Z	0.471	false
2019-03-15T04:45Z	0.471	false
2019-03-15T04:30Z	0.471	false
2019-03-15T04:15Z	0.471	false
2019-03-15T04:00Z	0.471	false
2019-03-15T03:45Z	0.471	false
2019-03-15T03:30Z	0.472	false
2019-03-15T03:15Z	0.472	false
2019-03-15T03:00Z	0.472	false
2019-03-15T02:45Z	0.471	false
2019-03-15T02:30Z	0.471	false
2019-03-15T02:15Z	0.472	false
2019-03-15T02:00Z	0.472	false
2019-03-15T01:45Z	0.472	false
2019-03-15T01:30Z	0.472	false
2019-03-15T01:15Z	0.472	false
2019-03-15T01:00Z	0.472	false
2019-03-15T00:45Z	0.472	false
2019-03-15T00:30Z	0.473	false
2019-03-15T00:15Z	0.472	false
2019-03-15T00:00Z	0.473	false
2019-03-14T23:45Z	0.473	false
2019-03-14T23:30Z	0.473	false
2019-03-14T23:15Z	0.473	false
2019-03-14T23:00Z	0.475	false
2019-03-14T22:45Z	0.474	false
2019-03-14T22:30Z	0.474	false
2019-03-14T22:15Z	0.475	false

Forecast data

Key information

• Station name: Henley River
• Station ID: 2083
• River name: River Alne
• Typical range: 0.39m to 0.55m
• Highest level on record: 2.43m on 20 July 2007
• Site datum: 73.50mAOD (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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