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⤴Unusual rise — FloodRadar+Top 1% rise rate for this gauge.
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You'll be notified when this gauge is rising more than 0.10 mASD/hr — a sign of rapidly increasing water levels.
Beta. You'll be notified when a flood wave detected at an upstream gauge is forecast to reach this station, with an estimated arrival time. Accuracy improves as we verify more waves.
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.
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Current Level
0.024 mASD
▬ Steady
24h Max
0.026 mASD
24h Min
0.020 mASD
Typical Range
0.10 - 1.30
mASD
Highest Recorded
3.91 mASD
16 Mar 2013
Since Nov 2012
Current level is 1% of this
🚽Sewage overflows nearby
Recent Water Levels
🌍 floodradar.co.uk
1 day
Prediction V2
Prediction Eris
Nimbus beta
Experimental model fusing soil moisture, river flow, groundwater and catchment
character. Shown with its calibrated 10–90% confidence band. 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.
Long Term
🌍 floodradar.co.uk
—
Consecutive rainy days0 → 10+
Days Above Normal
This year vs 5-year monthly range
Recent Readings
Steady over 6h
24 Aug 00:00▬ steady0.024 mASD
23 Aug 23:45▬ steady0.024 mASD
23 Aug 23:30▬ steady0.024 mASD
23 Aug 23:15▬ steady0.024 mASD
23 Aug 23:00▬ steady0.024 mASD
23 Aug 22:45▬ steady0.024 mASD
23 Aug 21:30▬ steady0.024 mASD
23 Aug 21:15▬ steady0.024 mASD
23 Aug 21:00▬ steady0.024 mASD
23 Aug 20:45▬ steady0.024 mASD
23 Aug 20:30▬ steady0.024 mASD
23 Aug 20:15▬ steady0.024 mASD
23 Aug 20:00▬ steady0.024 mASD
23 Aug 19:45▬ steady0.024 mASD
23 Aug 19:30▬ steady0.024 mASD
23 Aug 19:15▬ steady0.024 mASD
23 Aug 19:00▬ steady0.024 mASD
23 Aug 18:45▬ steady0.024 mASD
23 Aug 18:30▬ steady0.024 mASD
23 Aug 18:150.024 mASD
Rainfall & Weather
Loading rainfall and weather data...
Flood history near this gauge
Official Environment Agency warnings issued since 2013 for the 4 flood
areas linked to this gauge (nearest 3.0 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 Hail Weston flood history.
Geographic coordinates may reflect the access point for the gauge, and not the precise location in the watercourse that it is taking readings from.
Catchment Character
🌊 FlashyRain runs off fast — levels rise and fall sharply, often within hours of heavy rain.
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
0.31
flashy — rain runs off fast
Avg Annual Rainfall
620 mm/yr
1991–2020 · +2% since 1941–70
Urban Extent
0.7%
largely rural
Median Annual Flood
16.82 m³/s
QMED — typical yearly peak flow
Highest Recorded Flow
21.90 m³/s
15 Mar 1964
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.
Compound weir gauging a predominantly clay catchment with near-natural flow regime.
More detail
The catchment
Predominantly clay catchment - very flashy by Anglian standards. Agricultural, predominantly arable.
The station
Compound weir with triangular profile centre section 3m wide and broad-crested flanks in a trapezoidal channel, 8.5m wide. One of 3 stations used to calculate Offord flow to determine abstraction regime at Grafham Water. No major bridge/weir change from 1959 drawings to H Reed 1994 survey.
How it measures flow
Downstream level used to flag non-modularity. Peak flow rating takes non-modularity into account but there is a high degree of scatter. One peak flow ratings applied across period of record. There is a stage offset of +1m in WISKI. This has been applied to all stage data, ratings, gaugings, bankfull and wingwall height.
Flow regime
Predominantly natural regime with modest abstractions for agriculture. Some effluent returns.
The flow record
Peak flows rejected between 1963 and 1966 due to low confidence. Water year 2002/2003 rejected due to AMAX occurring during missing period in Jan-Mar 2003. Full period of record peak flow data reviewed and released in August 2021 (WINFAP Files v10).
How this gauging station is built and how long it has measured (NRFA / UKCEH).
Gauge type
Gauging structure
Operating since
1960
Station datum
17.2 mAOD
Flow record
1960–2024 · 64 yrs · 100% complete
Peak-flow record
since 1960
Hydrometric area
33
Measured by
Environment Agency
Nearby Groundwater
Soil Moisture
Possible storm-overflow correlation
🚽 Storm overflows on this river
Frequently asked questions
Is the River Kym at Hail Weston flooding today?
The current level is 0.02m, which is below the typical range. Flooding is very unlikely at this level.
Is the river level rising or falling at Hail Weston?
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.
What is a normal level for the River Kym at Hail Weston?
The typical range at this station is 0.10m to 1.30m, based on Environment Agency historical data. Levels above 1.30m are higher than usually seen and may indicate a flood risk.
How often is this river level data updated?
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.
Embed this gauge on your website
Free live river-level widget — ideal for parish councils, angling clubs and local sites. Updates automatically.
Preview
📮 Flood risk by postcode near this gauge
Postcodes within 5 km with properties in the Environment Agency’s rivers-and-sea flood-risk bands:
21 Sep 2018 Upstream section
21 Sep 2018 Downstream section
1983 View of structure
1983 Upstream section
1983 Downstream section
1983 View across weir from right bank to left bank
