River level River Yealm at Cornwood

Check for flood warnings in this area

Latest recorded level 0.25m at 9:00am Wednesday 20 March 2019.

River levels at this location in the last 5 days

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• Measured level
• When the water level reaches 1.50m 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
2019-03-20T09:00Z	0.246	false
2019-03-20T08:45Z	0.248	false
2019-03-20T08:30Z	0.244	false
2019-03-20T08:15Z	0.243	false
2019-03-20T08:00Z	0.245	false
2019-03-20T07:45Z	0.246	false
2019-03-20T07:30Z	0.247	false
2019-03-20T07:15Z	0.246	false
2019-03-20T07:00Z	0.246	false
2019-03-20T06:45Z	0.247	false
2019-03-20T06:30Z	0.246	false
2019-03-20T06:15Z	0.247	false
2019-03-20T06:00Z	0.247	false
2019-03-20T05:45Z	0.249	false
2019-03-20T05:30Z	0.249	false
2019-03-20T05:15Z	0.248	false
2019-03-20T05:00Z	0.248	false
2019-03-20T04:45Z	0.248	false
2019-03-20T04:30Z	0.248	false
2019-03-20T04:15Z	0.248	false
2019-03-20T04:00Z	0.247	false
2019-03-20T03:45Z	0.245	false
2019-03-20T03:30Z	0.246	false
2019-03-20T03:15Z	0.246	false
2019-03-20T03:00Z	0.247	false
2019-03-20T02:45Z	0.248	false
2019-03-20T02:30Z	0.248	false
2019-03-20T02:15Z	0.248	false
2019-03-20T02:00Z	0.247	false
2019-03-20T01:45Z	0.249	false
2019-03-20T01:30Z	0.248	false
2019-03-20T01:15Z	0.248	false
2019-03-20T01:00Z	0.247	false
2019-03-20T00:45Z	0.246	false
2019-03-20T00:30Z	0.248	false
2019-03-20T00:15Z	0.248	false
2019-03-20T00:00Z	0.246	false
2019-03-19T23:45Z	0.247	false
2019-03-19T23:30Z	0.248	false
2019-03-19T23:15Z	0.249	false
2019-03-19T23:00Z	0.248	false
2019-03-19T22:45Z	0.248	false
2019-03-19T22:30Z	0.25	false
2019-03-19T22:15Z	0.247	false
2019-03-19T22:00Z	0.25	false
2019-03-19T21:45Z	0.249	false
2019-03-19T21:30Z	0.251	false
2019-03-19T21:15Z	0.25	false
2019-03-19T21:00Z	0.249	false
2019-03-19T20:45Z	0.249	false
2019-03-19T20:30Z	0.249	false
2019-03-19T20:15Z	0.25	false
2019-03-19T20:00Z	0.252	false
2019-03-19T19:45Z	0.252	false
2019-03-19T19:30Z	0.254	false
2019-03-19T19:15Z	0.253	false
2019-03-19T19:00Z	0.252	false
2019-03-19T18:45Z	0.251	false
2019-03-19T18:30Z	0.25	false
2019-03-19T18:15Z	0.251	false
2019-03-19T18:00Z	0.253	false
2019-03-19T17:45Z	0.252	false
2019-03-19T17:30Z	0.252	false
2019-03-19T17:15Z	0.25	false
2019-03-19T17:00Z	0.254	false
2019-03-19T16:45Z	0.254	false
2019-03-19T16:30Z	0.254	false
2019-03-19T16:15Z	0.253	false
2019-03-19T09:00Z	0.256	false
2019-03-19T08:45Z	0.255	false
2019-03-19T08:30Z	0.256	false
2019-03-19T08:15Z	0.258	false
2019-03-19T08:00Z	0.256	false
2019-03-19T07:45Z	0.255	false
2019-03-19T07:30Z	0.256	false
2019-03-19T07:15Z	0.257	false
2019-03-19T07:00Z	0.256	false
2019-03-19T06:45Z	0.257	false
2019-03-19T06:30Z	0.257	false
2019-03-19T06:15Z	0.254	false
2019-03-19T06:00Z	0.255	false
2019-03-19T05:45Z	0.258	false
2019-03-19T05:30Z	0.257	false
2019-03-19T05:15Z	0.257	false
2019-03-19T05:00Z	0.256	false
2019-03-19T04:45Z	0.26	false
2019-03-19T04:30Z	0.259	false
2019-03-19T04:15Z	0.257	false
2019-03-19T04:00Z	0.26	false
2019-03-19T03:45Z	0.259	false
2019-03-19T03:30Z	0.259	false
2019-03-19T03:15Z	0.259	false
2019-03-19T03:00Z	0.259	false
2019-03-19T02:45Z	0.259	false
2019-03-19T02:30Z	0.258	false
2019-03-19T02:15Z	0.259	false
2019-03-19T02:00Z	0.258	false
2019-03-19T01:45Z	0.259	false
2019-03-19T01:30Z	0.261	false
2019-03-19T01:15Z	0.26	false
2019-03-19T01:00Z	0.26	false
2019-03-19T00:45Z	0.257	false
2019-03-19T00:30Z	0.261	false
2019-03-19T00:15Z	0.261	false
2019-03-19T00:00Z	0.26	false
2019-03-18T23:45Z	0.261	false
2019-03-18T23:30Z	0.261	false
2019-03-18T23:15Z	0.261	false
2019-03-18T23:00Z	0.262	false
2019-03-18T22:45Z	0.261	false
2019-03-18T22:30Z	0.26	false
2019-03-18T22:15Z	0.262	false
2019-03-18T22:00Z	0.262	false
2019-03-18T21:45Z	0.264	false
2019-03-18T21:30Z	0.261	false
2019-03-18T21:15Z	0.263	false
2019-03-18T21:00Z	0.263	false
2019-03-18T20:45Z	0.264	false
2019-03-18T20:30Z	0.263	false
2019-03-18T20:15Z	0.262	false
2019-03-18T20:00Z	0.263	false
2019-03-18T19:45Z	0.265	false
2019-03-18T19:30Z	0.265	false
2019-03-18T19:15Z	0.263	false
2019-03-18T19:00Z	0.261	false
2019-03-18T18:45Z	0.265	false
2019-03-18T18:30Z	0.261	false
2019-03-18T18:15Z	0.259	false
2019-03-18T18:00Z	0.261	false
2019-03-18T17:45Z	0.257	false
2019-03-18T17:30Z	0.261	false
2019-03-18T17:15Z	0.26	false
2019-03-18T17:00Z	0.263	false
2019-03-18T16:45Z	0.261	false
2019-03-18T16:30Z	0.258	false
2019-03-18T16:15Z	0.262	false
2019-03-18T16:00Z	0.258	false
2019-03-18T15:45Z	0.26	false
2019-03-18T15:30Z	0.259	false
2019-03-18T15:15Z	0.259	false
2019-03-18T15:00Z	0.256	false
2019-03-18T14:45Z	0.255	false
2019-03-18T14:30Z	0.255	false
2019-03-18T14:15Z	0.256	false
2019-03-18T14:00Z	0.258	false
2019-03-18T13:45Z	0.257	false
2019-03-18T13:30Z	0.258	false
2019-03-18T13:15Z	0.256	false
2019-03-18T13:00Z	0.257	false
2019-03-18T12:45Z	0.257	false
2019-03-18T12:30Z	0.255	false
2019-03-18T12:15Z	0.257	false
2019-03-18T12:00Z	0.255	false
2019-03-18T11:45Z	0.255	false
2019-03-18T11:30Z	0.255	false
2019-03-18T11:15Z	0.256	false
2019-03-18T11:00Z	0.257	false
2019-03-18T10:45Z	0.256	false
2019-03-18T10:30Z	0.253	false
2019-03-18T10:15Z	0.254	false
2019-03-18T10:00Z	0.254	false
2019-03-18T09:45Z	0.256	false
2019-03-18T09:30Z	0.253	false
2019-03-18T09:15Z	0.253	false
2019-03-18T09:00Z	0.256	false
2019-03-18T08:45Z	0.253	false
2019-03-18T08:30Z	0.254	false
2019-03-18T08:15Z	0.252	false
2019-03-18T08:00Z	0.251	false
2019-03-18T07:45Z	0.252	false
2019-03-18T07:30Z	0.253	false
2019-03-18T07:15Z	0.249	false
2019-03-18T07:00Z	0.253	false
2019-03-18T06:45Z	0.251	false
2019-03-18T06:30Z	0.253	false
2019-03-18T06:15Z	0.252	false
2019-03-18T06:00Z	0.252	false
2019-03-18T05:45Z	0.25	false
2019-03-18T05:30Z	0.255	false
2019-03-18T05:15Z	0.253	false
2019-03-18T05:00Z	0.255	false
2019-03-18T04:45Z	0.254	false
2019-03-18T04:30Z	0.253	false
2019-03-18T04:15Z	0.255	false
2019-03-18T04:00Z	0.256	false
2019-03-18T03:45Z	0.253	false
2019-03-18T03:30Z	0.254	false
2019-03-18T03:15Z	0.255	false
2019-03-18T03:00Z	0.257	false
2019-03-18T02:45Z	0.255	false
2019-03-18T02:30Z	0.255	false
2019-03-18T02:15Z	0.258	false
2019-03-18T02:00Z	0.256	false
2019-03-18T01:45Z	0.257	false
2019-03-18T01:30Z	0.258	false
2019-03-18T01:15Z	0.258	false
2019-03-18T01:00Z	0.257	false
2019-03-18T00:45Z	0.26	false
2019-03-18T00:30Z	0.257	false
2019-03-18T00:15Z	0.258	false
2019-03-18T00:00Z	0.258	false
2019-03-17T23:45Z	0.262	false
2019-03-17T23:30Z	0.259	false
2019-03-17T23:15Z	0.261	false
2019-03-17T23:00Z	0.259	false
2019-03-17T22:45Z	0.262	false
2019-03-17T22:30Z	0.261	false
2019-03-17T22:15Z	0.26	false
2019-03-17T22:00Z	0.263	false
2019-03-17T21:45Z	0.259	false
2019-03-17T21:30Z	0.261	false
2019-03-17T21:15Z	0.26	false
2019-03-17T21:00Z	0.263	false
2019-03-17T20:45Z	0.26	false
2019-03-17T20:30Z	0.263	false
2019-03-17T20:15Z	0.262	false
2019-03-17T20:00Z	0.264	false
2019-03-17T19:45Z	0.262	false
2019-03-17T19:30Z	0.264	false
2019-03-17T19:15Z	0.263	false
2019-03-17T19:00Z	0.266	false
2019-03-17T18:45Z	0.264	false
2019-03-17T18:30Z	0.268	false
2019-03-17T18:15Z	0.263	false
2019-03-17T18:00Z	0.265	false
2019-03-17T17:45Z	0.268	false
2019-03-17T17:30Z	0.268	false
2019-03-17T17:15Z	0.268	false
2019-03-17T17:00Z	0.267	false
2019-03-17T16:45Z	0.27	false
2019-03-17T16:30Z	0.272	false
2019-03-17T16:15Z	0.268	false
2019-03-17T16:00Z	0.267	false
2019-03-17T15:45Z	0.27	false
2019-03-17T15:30Z	0.268	false
2019-03-17T15:15Z	0.271	false
2019-03-17T15:00Z	0.271	false
2019-03-17T14:45Z	0.272	false
2019-03-17T14:30Z	0.27	false
2019-03-17T14:15Z	0.272	false
2019-03-17T14:00Z	0.272	false
2019-03-17T13:45Z	0.273	false
2019-03-17T13:30Z	0.277	false
2019-03-17T13:15Z	0.275	false
2019-03-17T13:00Z	0.273	false
2019-03-17T12:45Z	0.274	false
2019-03-17T12:30Z	0.276	false
2019-03-17T12:15Z	0.275	false
2019-03-17T12:00Z	0.275	false
2019-03-17T11:45Z	0.274	false
2019-03-17T11:30Z	0.277	false
2019-03-17T11:15Z	0.274	false
2019-03-17T11:00Z	0.275	false
2019-03-17T10:45Z	0.277	false
2019-03-17T10:30Z	0.276	false
2019-03-17T10:15Z	0.276	false
2019-03-17T10:00Z	0.274	false
2019-03-17T09:45Z	0.278	false
2019-03-17T09:30Z	0.278	false
2019-03-17T09:15Z	0.28	false
2019-03-17T09:00Z	0.282	false
2019-03-17T08:45Z	0.284	false
2019-03-17T08:30Z	0.285	false
2019-03-17T08:15Z	0.286	false
2019-03-17T08:00Z	0.29	false
2019-03-17T07:45Z	0.29	false
2019-03-17T07:30Z	0.286	false
2019-03-17T07:15Z	0.29	false
2019-03-17T07:00Z	0.292	false
2019-03-17T06:45Z	0.294	false
2019-03-17T06:30Z	0.29	false
2019-03-17T06:15Z	0.298	false
2019-03-17T06:00Z	0.299	false
2019-03-17T05:45Z	0.299	false
2019-03-17T05:30Z	0.3	false
2019-03-17T05:15Z	0.306	false
2019-03-17T05:00Z	0.305	false
2019-03-17T04:45Z	0.305	false
2019-03-17T04:30Z	0.308	false
2019-03-17T04:15Z	0.308	false
2019-03-17T04:00Z	0.313	false
2019-03-17T03:45Z	0.313	false
2019-03-17T03:30Z	0.318	false
2019-03-17T03:15Z	0.323	false
2019-03-17T03:00Z	0.327	false
2019-03-17T02:45Z	0.33	false
2019-03-17T02:30Z	0.327	false
2019-03-17T02:15Z	0.337	false
2019-03-17T02:00Z	0.34	false
2019-03-17T01:45Z	0.342	false
2019-03-17T01:30Z	0.348	false
2019-03-17T01:15Z	0.35	false
2019-03-17T01:00Z	0.354	false
2019-03-17T00:45Z	0.359	false
2019-03-17T00:30Z	0.361	false
2019-03-17T00:15Z	0.367	false
2019-03-17T00:00Z	0.368	false
2019-03-16T23:45Z	0.37	false
2019-03-16T23:30Z	0.374	false
2019-03-16T23:15Z	0.372	false
2019-03-16T23:00Z	0.379	false
2019-03-16T22:45Z	0.38	false
2019-03-16T22:30Z	0.383	false
2019-03-16T22:15Z	0.376	false
2019-03-16T22:00Z	0.38	false
2019-03-16T21:45Z	0.375	false
2019-03-16T21:30Z	0.364	false
2019-03-16T21:15Z	0.364	false
2019-03-16T21:00Z	0.352	false
2019-03-16T20:45Z	0.34	false
2019-03-16T20:30Z	0.329	false
2019-03-16T20:15Z	0.314	false
2019-03-16T20:00Z	0.303	false
2019-03-16T19:45Z	0.298	false
2019-03-16T19:30Z	0.292	false
2019-03-16T19:15Z	0.287	false
2019-03-16T19:00Z	0.281	false
2019-03-16T18:45Z	0.277	false
2019-03-16T18:30Z	0.274	false
2019-03-16T18:15Z	0.272	false
2019-03-16T18:00Z	0.272	false
2019-03-16T17:45Z	0.266	false
2019-03-16T17:30Z	0.267	false
2019-03-16T17:15Z	0.268	false
2019-03-16T17:00Z	0.266	false
2019-03-16T16:45Z	0.267	false
2019-03-16T16:30Z	0.268	false
2019-03-16T16:15Z	0.265	false
2019-03-16T16:00Z	0.267	false
2019-03-16T15:45Z	0.265	false
2019-03-16T15:30Z	0.27	false
2019-03-16T15:15Z	0.268	false
2019-03-16T15:00Z	0.267	false
2019-03-16T14:45Z	0.267	false
2019-03-16T14:30Z	0.266	false
2019-03-16T14:15Z	0.268	false
2019-03-16T14:00Z	0.265	false
2019-03-16T13:45Z	0.267	false
2019-03-16T13:30Z	0.269	false
2019-03-16T13:15Z	0.265	false
2019-03-16T13:00Z	0.268	false
2019-03-16T12:45Z	0.267	false
2019-03-16T12:30Z	0.269	false
2019-03-16T12:15Z	0.265	false
2019-03-16T12:00Z	0.264	false
2019-03-16T11:45Z	0.267	false
2019-03-16T11:30Z	0.266	false
2019-03-16T11:15Z	0.267	false
2019-03-16T11:00Z	0.263	false
2019-03-16T10:45Z	0.261	false
2019-03-16T10:30Z	0.262	false
2019-03-16T10:15Z	0.266	false
2019-03-16T10:00Z	0.262	false
2019-03-16T09:45Z	0.263	false
2019-03-16T09:30Z	0.268	false
2019-03-16T09:15Z	0.263	false
2019-03-16T09:00Z	0.264	false
2019-03-16T08:45Z	0.264	false
2019-03-16T08:30Z	0.265	false
2019-03-16T08:15Z	0.264	false
2019-03-16T08:00Z	0.265	false
2019-03-16T07:45Z	0.264	false
2019-03-16T07:30Z	0.265	false
2019-03-16T07:15Z	0.266	false
2019-03-16T07:00Z	0.264	false
2019-03-16T06:45Z	0.264	false
2019-03-16T06:30Z	0.263	false
2019-03-16T06:15Z	0.262	false
2019-03-16T06:00Z	0.262	false
2019-03-16T05:45Z	0.262	false
2019-03-16T05:30Z	0.266	false
2019-03-16T05:15Z	0.267	false
2019-03-16T05:00Z	0.265	false
2019-03-16T04:45Z	0.266	false
2019-03-16T04:30Z	0.268	false
2019-03-16T04:15Z	0.266	false
2019-03-16T04:00Z	0.265	false
2019-03-16T03:45Z	0.266	false
2019-03-16T03:30Z	0.267	false
2019-03-16T03:15Z	0.264	false
2019-03-16T03:00Z	0.268	false
2019-03-16T02:45Z	0.266	false
2019-03-16T02:30Z	0.267	false
2019-03-16T02:15Z	0.27	false
2019-03-16T02:00Z	0.269	false
2019-03-16T01:45Z	0.268	false
2019-03-16T01:30Z	0.265	false
2019-03-16T01:15Z	0.27	false
2019-03-16T01:00Z	0.27	false
2019-03-16T00:45Z	0.269	false
2019-03-16T00:30Z	0.268	false
2019-03-16T00:15Z	0.268	false
2019-03-16T00:00Z	0.271	false
2019-03-15T23:45Z	0.272	false
2019-03-15T23:30Z	0.27	false
2019-03-15T23:15Z	0.27	false
2019-03-15T23:00Z	0.272	false
2019-03-15T22:45Z	0.271	false
2019-03-15T22:30Z	0.27	false
2019-03-15T22:15Z	0.267	false
2019-03-15T22:00Z	0.27	false
2019-03-15T21:45Z	0.269	false
2019-03-15T21:30Z	0.27	false
2019-03-15T21:15Z	0.273	false
2019-03-15T21:00Z	0.271	false
2019-03-15T20:45Z	0.27	false
2019-03-15T20:30Z	0.269	false
2019-03-15T20:15Z	0.267	false
2019-03-15T20:00Z	0.272	false
2019-03-15T19:45Z	0.269	false
2019-03-15T19:30Z	0.271	false
2019-03-15T19:15Z	0.268	false
2019-03-15T19:00Z	0.271	false
2019-03-15T18:45Z	0.267	false
2019-03-15T18:30Z	0.271	false
2019-03-15T18:15Z	0.273	false
2019-03-15T18:00Z	0.27	false
2019-03-15T17:45Z	0.273	false
2019-03-15T17:30Z	0.273	false
2019-03-15T17:15Z	0.273	false
2019-03-15T17:00Z	0.271	false
2019-03-15T16:45Z	0.272	false
2019-03-15T16:30Z	0.271	false
2019-03-15T16:15Z	0.274	false
2019-03-15T16:00Z	0.272	false
2019-03-15T15:45Z	0.274	false
2019-03-15T15:30Z	0.272	false
2019-03-15T15:15Z	0.275	false
2019-03-15T15:00Z	0.274	false
2019-03-15T14:45Z	0.277	false
2019-03-15T14:30Z	0.272	false
2019-03-15T14:15Z	0.272	false
2019-03-15T14:00Z	0.276	false
2019-03-15T13:45Z	0.275	false
2019-03-15T13:30Z	0.274	false

Forecast data

Key information

• Station name: Cornwood
• Station ID: 3188
• River name: River Yealm
• Typical range: 0.11m to 1.50m
• Highest level on record: 2.59m on 07 July 2012
• 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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