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⤴Unusual rise — FloodRadar+Top 1% rise rate for this gauge.
Height for "Above a height"
Drag the line on the chart, or type a value:mASD
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You'll be notified when this gauge is rising more than 0.10 m/hr — a sign of rapidly increasing water levels.
You'll be notified when a new storm-overflow (sewage) discharge starts within ~3 km of this gauge, based on the water companies' near-real-time feeds.
Get notified when recent rainfall near this gauge crosses its learnt rise trigger — an early "watch"
signal, typically hours before a rise. Experimental; not an official flood warning.
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Not an emergency service — if in danger call 999. Alerts rely on
EA/SEPA/NRW data and are best-efforts. Terms
Current Level
0.102 mASD
▬ Steady
24h Max
0.104 mASD
24h Min
0.101 mASD
Typical Range
0.10 - 0.75
mASD
Highest Recorded
1.83 mASD
EA official record
1.82 in our data (since Nov 2012)
Current level is 6% of this
🚽Sewage overflows nearby
Recent Water Levels
🌍 floodradar.co.uk
1 day
EA forecast (official)
Prediction V2
Prediction Eris
Nimbus beta
Experimental model fusing soil moisture, river flow, groundwater and catchment
character. The shaded band is its 10–90% range, widened so that about 80% of recent outcomes fall inside it.
Under evaluation — not yet promoted, so treat as a second opinion.
River Flow
90 days
Daily mean discharge (m³/s) with the daily min–max band, from the EA Hydrology API. Flow is the volume of water passing the gauge — often a more direct flood signal than level.
Flow Data: Daily mean flow (m³/s) to 8 Oct (2 days behind — the EA publishes each day's mean a day or two after it ends; unchecked, provisional)via EA Hydrology
Storm overflows whose water reaches this gauge on the mapped river network, nearest first by distance along the river. The status is each water company's monitor: it says whether an overflow is discharging, not how much or what it contains.
5 storm overflows are traced upstream of this gauge, the nearest 5.1 km away along the river. 0 report discharging now, 5 report not discharging.
Wessex Water · into Shreen Water · 6.6 km upstream along the river
1 spill · 0 hours in 2025
Not discharging now · last
7 other overflows within 6 km are downstream of this gauge or on another branch of the river network, so they are not listed.
These are the water companies' monitor statuses; a spill does not by itself explain a change in the gauge level. River connections and distances are traced on OS Open Rivers (edition 2026-04), which leaves out many small channels. Explore the sewage map →
In a typical year this gauge reaches its typical high of 0.75 m
on about 8 days.
This year so far: 6 days.
20266 days, 1 of them high · 1 highso far
202510 days, 5 of them high · 5 high
202415 days, 8 of them high · 8 high
202312 days, 8 of them high · 8 high
20225 days, 1 of them high · 1 high
20215 days, 4 of them high · 4 high
20204 days, 1 of them high · 1 high
20194 days, 1 of them high · 1 high
201810 days, 4 of them high · 4 high
20173 days, 2 of them high · 2 high
Counted from each day's highest reading. Days with missing or implausible readings are left out.
The darker part is days above 1.00 m, the level this gauge tops only a few days a year.
Flood history near this gauge
Official Environment Agency warnings issued since 2007 for the 9 flood
areas linked to this gauge (nearest 0.1 km away).
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 Milton On Stour flood history.
Flood areas linked to this gauge
Flood warnings and alerts are issued for whole areas. These are the 9 areas linked to this gauge, nearest first.
🌊 Mixed responseA balance of quick runoff and slower groundwater baseflow.
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).
Baseflow Index
0.57
mixed response
Avg Annual Rainfall
944 mm/yr
1991–2020 · +3% since 1941–70
Urban Extent
1.6%
largely rural
Median Annual Flood
13.51 m³/s
QMED — typical yearly peak flow
Highest Daily Mean Flow
11.70 m³/s
9 Jul 2008 · daily mean, not the instantaneous peak
Flow-Duration Curve
Daily flow (m³/s) exceeded each % of the time — a steep curve is flashy, a flat one is steady. Q5 high · Q50 median · Q95 low.
Land Cover (2023)
Woodland 3%Grassland 56%Arable 35%Urban 5%
Grassland 63% → 56% since 1990
Flow affected by: groundwater abstraction.
Photos
Gauging-station photographs from the National River Flow Archive (UKCEH).
Predominantly Kimmeridge Clay (70%), some Chalk (15%) and Upper Greensand and Gault (15%) in the north of the catchment. Flat pasture land on both sides of river. Runoff calculations suggest hydrological & topographical catchments do not coincide. Runoff figures (may be over-estimated) suggest topographical and hydrological catchment areas do not coincide. Substantial baseflow component but flashy response to storm events. Land use is predominantly agricultural.
The station
Crump profile weir, crest 3m wide.
How it measures flow
Reasonable rating up to QMED. Structure drowns before bankfull stage, flow goes out-of-bank, and there is significant bypassing. Gauging is difficult and gaugings > 5m3s-1 show substantial scatter; high flows unreliable - may be significantly over-estimated. One peak flow rating applied across period of record.
Flow regime
Significant ground water pumping in catchment. Some augmentation from effluent returns.
The flow record
Full period of record peak flow data reviewed and released in October 2018 (WINFAP Files v7) and in August 2024 (WINFAP Files v13).
Timing, not cause. Gauges can move together simply because the same rain fell on both.
Frequently asked questions
Is the Shreen Water at Colesbrook flooding today?
The current level is 0.10m, which is within the typical range of 0.10 to 0.75m. Flooding is unlikely at this level.
Is the river level rising or falling at Colesbrook?
Based on the most recent readings, the level is currently steady. The chart above shows the last 12 hours of measurements by default (up to 7 days), updated roughly every 15 minutes.
What is a normal level for the Shreen Water at Colesbrook?
The typical range at this station is 0.10m to 0.75m, based on Environment Agency historical data. Levels above 0.75m are higher than usually seen and may indicate a flood risk.
How often is this river level data updated?
Readings are supplied by the Environment Agency gauge. FloodRadar checks for updates roughly every 15 minutes; the timestamp above shows how recent the latest available reading is.
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📮 Flood risk by postcode near this gauge
Postcodes within 5 km with properties in the Environment Agency’s rivers-and-sea flood-risk bands:
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