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Not an emergency service — if in danger call 999. Alerts rely on EA/SEPA data and are best-efforts. Terms
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Official Environment Agency warnings issued since 2012 for the 13 flood areas linked to this gauge (nearest 0.9 km away).
Most recent flood warning: 24 Dec 2022 — Weatherhill Stream at Smallfield
| Year | Warnings | Alerts |
|---|---|---|
| 2026 | 0 | 7 |
| 2025 | 0 | 11 |
| 2024 | 0 | 22 |
| 2023 | 0 | 14 |
| 2022 | 4 | 8 |
| 2021 | 0 | 6 |
| 2020 | 3 | 8 |
| 2019 | 5 | 14 |
| 2018 | 0 | 2 |
| 2017 | 0 | 3 |
| 2016 | 0 | 13 |
| 2015 | 0 | 4 |
| 2014 | 18 | 9 |
| 2013 | 6 | 8 |
| 2012 | 6 | 11 |
Warnings apply to a whole flood area, not necessarily this exact spot. Years before 2006 aren't covered by the EA's historic record. See also the Horley flood history.
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Geographic coordinates may reflect the access point for the gauge, and not the precise location in the watercourse that it is taking readings from.
Your catchment is all the land that drains rainfall into the river above this gauge. Its character — how steep, wet, wooded, urban or chalky that land is — decides how fast rain here turns into a rising river. A steep, bare or clay catchment is “flashy” (rises and falls quickly, floods easily); a flat, chalk or well-wooded one is slow and steady. The tiles below put numbers to that; the flow-duration curve reads left-to-right from the river’s typical high flows (Q5) down to its low flows (Q95) — a steep curve means a flashy river.
The physical character of the land that drains to this gauge, and how it shapes its flood response — from the National River Flow Archive (UKCEH).
Flow affected by: public water supply, effluent returns.
Gauging-station photographs from the National River Flow Archive (UKCEH).
May 1985 Upstream view to gauging station
May 1985 Approach channel
May 1985 Downstream of weir
May 1985 Channel downstream
May 1985 Weir
View of weir profile from right bank
View of weir looking upstream from right bank
View of downstream road Bridge looking downstream from left bank (during flood conditions)
Downstream view
Photos © NRFA / UKCEH & the measuring authority — shown at web resolution. Full gallery on the NRFA ↗
Compound broad-crested weir. Runoff reduced by public water supply abstraction and increased by increasing sewage effluent contribution.
Descriptions from the National River Flow Archive (UKCEH). NRFA station record ↗
How this gauging station is built and how long it has measured (NRFA / UKCEH).
The current level is 0.32m, which is within the typical range of 0.19 to 2.42m. Flooding is unlikely at this level.
Based on the most recent readings, the level is currently steady. The chart above shows the last 7 days of measurements, updated roughly every 15 minutes.
When little or no rain has fallen for a while, a river level gradually drops as the water stored in the ground and soil drains away with nothing to replace it. This is called baseflow recession and is normal in dry spells. Only about 3.6mm of rain has fallen nearby in the last 7 days, so the flow is being sustained mainly by groundwater. A gentle decline like this is expected and is not a sign of a problem — downstream gauges often recede a little faster than headwaters further upstream, and levels recover once rain returns.
The typical range at this station is 0.19m to 2.42m, based on Environment Agency historical data. Levels above 2.42m are higher than usually seen and may indicate a flood risk.
Readings are taken by the Environment Agency gauge roughly every 15 minutes and FloodRadar refreshes its data continuously, so the level shown is normally less than an hour old.
Free live river-level widget — ideal for parish councils, angling clubs and local sites. Updates automatically.
Postcodes within 5 km with properties in the Environment Agency’s rivers-and-sea flood-risk bands:
