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0.43

Wansford Snakeholm Lock

West Beck ⚙ Structure
Hull and East Riding catchment • Wansford Snakeholm Lock • East Riding of Yorkshire • ID: F3105 • Level
(25m ago) • 4 readings/hr • 149 views

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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
0.426 m
▬ Steady
24h Max
0.436 m
24h Min
0.425 m
Typical Range
0.41 - 1.52
m
Highest Recorded
1.99 m
EA official record
1.94 in our data (since Jun 1989)
Current level is 21% of this
🚽 Sewage overflows nearby

Recent Water Levels

🌍 floodradar.co.uk
1 day

Flood predictions aren't generated for lock / structure gauges — their levels are driven by gate operation, not by catchment rainfall, so the forecast models would have no skill here.

Recent Readings

Falling · -0.3 cm over 5h
08 Oct 13:30 ▬ steady 0.426 m
08 Oct 13:15 ▬ steady 0.426 m
08 Oct 13:00 ▬ steady 0.426 m
08 Oct 12:45 ▼ -0.1 cm 0.426 m
08 Oct 12:30 ▲ +0.1 cm 0.427 m
08 Oct 12:15 ▬ steady 0.426 m
08 Oct 11:45 ▲ +0.1 cm 0.426 m
08 Oct 11:30 ▬ steady 0.425 m
08 Oct 11:15 ▼ -0.1 cm 0.425 m
08 Oct 11:00 ▬ steady 0.426 m
08 Oct 10:45 ▬ steady 0.426 m
08 Oct 10:30 ▬ steady 0.426 m
08 Oct 10:15 ▬ steady 0.426 m
08 Oct 10:00 ▼ -0.1 cm 0.426 m
08 Oct 09:45 ▬ steady 0.427 m
08 Oct 09:30 ▼ -0.1 cm 0.427 m
08 Oct 09:15 ▬ steady 0.428 m
08 Oct 09:00 ▬ steady 0.428 m
08 Oct 08:45 ▼ -0.1 cm 0.428 m
08 Oct 08:30 0.429 m

Station Details

Technical details: references, datum, range, flow archive
  • Station Reference: F3105
  • RLOI id: 9146 (the EA's check-for-flooding station id)
  • EA Gauge ID: F3105-level-stage-i-15_min-m
  • Parameter: Level
  • Unit: m
  • Typical rise rate: 2 cm/hr (p95 sustained over 90 days)
  • Typical data delay: ~22 min (measured reading→publication lag)
  • Tidal: No
  • Lock / structure: ⚙ Yes — lock, weir, sluice or pump
  • Catchment Area: Hull and East Riding
  • Typical Range: 0.411 – 1.517 m
  • Drainage Area: 242 km² upstream of this gauge
  • Flow Data: Daily mean flow (m³/s) to 6 Oct (2 days behind — the EA publishes each day's mean a day or two after it ends; unchecked, provisional) via EA Hydrology
  • EA Cross-check: 0.43 m (EA at 8 Oct 13:15)
  • Flow Archive: National River Flow Archive ↗

Geographic coordinates may reflect the access point for the gauge, and not the precise location in the watercourse that it is taking readings from.

Nearby Stations

Gauges connected to this river, and others nearby. A distance “by river” follows the river on the map; any other is in a straight line.

Connected upstream

Connected downstream

Same river system, separate branch

Nearby

Distances by river: OS Open Rivers. Contains OS data © Crown copyright and database rights 2026.

💧 Storm overflows upstream of this gauge

None of the storm overflows FloodRadar holds is traced upstream of this gauge on the mapped river network. That is not the same as none: the map leaves out many small streams and culverts, so an overflow it cannot place may still drain here, and not every company publishes every overflow. Those nearby are listed below.

Nearby, connection not known

Within 6 km in a straight line, but the river map cannot say whether their water passes this gauge.

💧
Yorkshire Water · into Unnamed Trib Of Nafferton Beck · 890 m away in a straight line · its water cannot be followed on the map
1 spill · 0 hours in 2025
Not discharging now · last
💧
Yorkshire Water · into Tributary Of Nafferton Beck · 1.1 km away in a straight line · its water cannot be followed on the map
62 spills · 486 hours in 2025
Not discharging now · last
💧
Yorkshire Water · into Nafferton Beck · 3.2 km away in a straight line · its water cannot be followed on the map
13 spills · 173 hours in 2025
Not discharging now · last
💧
Yorkshire Water · into Driffield Canal · 3.7 km away in a straight line · discharges into a canal
35 spills · 424 hours in 2025
Not discharging now · last
💧
Yorkshire Water · into Frodingham Mill Drain · 3.8 km away in a straight line · its watercourse is not on the river map
28 spills · 94 hours in 2025
Not discharging now · last

1 other overflow within 6 km is downstream of this gauge or on another branch of the river network, so it is 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 →

Contains OS data © Crown copyright and database rights 2026.

Rainfall & Weather

Loading rainfall and weather data...

How often this river runs high

In a typical year this gauge reaches its typical high of 1.52 m on about 56 days. This year so far: 42 days.

2026 42 days so far
2025 40 days
2024 92 days, 18 of them high · 18 high
2023 60 days, 45 of them high · 45 high
2022 0 days
2021 84 days, 19 of them high · 19 high
2020 66 days
2019 66 days, 5 of them high · 5 high
2018 92 days
2017 0 days

Counted from each day's highest reading. Days with missing or implausible readings are left out. The darker part is days above 1.83 m, the level this gauge tops only a few days a year.

Flood history near this gauge

Official Environment Agency warnings issued since 2017 for the 1 flood area linked to this gauge (nearest 7.7 km away).

0flood warnings 32flood alerts

Most recent flood alert: 12 Feb 2026 — North Holderness

Year by year
YearWarningsAlerts
2026 0 1
2025 0 3
2024 0 4
2023 0 7
2022 0 1
2021 0 4
2020 0 4
2019 0 4
2018 0 3
2017 0 1

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 Wansford Snakeholm Lock flood history.

Flood areas linked to this gauge

Flood warnings and alerts are issued for whole areas. This is the area linked to this gauge, nearest first.

Catchment Character

🌊 Groundwater-fed Slow and steady — fed largely by groundwater, so levels change gradually, not in sudden spikes.

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
0.90
groundwater-fed — slow & steady
Avg Annual Rainfall
797 mm/yr
1991–2020 · +4% since 1941–70
Urban Extent
0.6%
largely rural
Median Annual Flood
5.78 m³/s
QMED — typical yearly peak flow
Highest Daily Mean Flow
8.60 m³/s
10 Jan 2003 · daily mean, not the instantaneous peak
Flow-Duration Curve
mean 2.266.001.610.4125% (high)% of days exceeded95% (low)
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 4%Grassland 16%Arable 78%Urban 2%

Photos

Gauging-station photographs from the National River Flow Archive (UKCEH).

Photos © NRFA / UKCEH & the measuring authority — shown at web resolution. Full gallery on the NRFA ↗

About this gauge

Electromagnetic station in a permeable Chalk catchment draining the Yorkshire Wolds.

More detail

The catchment

Permeable Chalk (Lower Cretaceous / Jurassic) catchment draining from the Yorkshire Wolds; some superficial deposits in lower catchment - note that chalk is harder than that found in Southern England. Surface and groundwater catchments are expected to differ considerably. Rural, mixed agriculture. Catchment includes a SSSI. No known catchment changes. NRFA catchment definition changed in 2015 review, previously included Driffield Canal.

The station

Electromagnetic gauge (1988-2022) with buried magnetic coil in 8m wide channel. Measures the West Beck, Driffield Canal runs alongside (original course of West Beck) and is gauged separately (station 26010 until 2016, replaced by new gauge at Wansford Bridge not currently on NRFA).

How it measures flow

Electromagnetic gauge in trapezoidal section. Weedgrowth in channel and shallow gradient leads to variable control and backwater, this does not affect the Electromagnetic gauge but prevents use of alternative stage:discharge relationship. Check gaugings to check accuracy of gauge and gap editing only. Electromagnetic gauge replaced by time-of-flight ultrasonic gauge in same section in October 2022.

Flow regime

Hydrology dominated by groundwater component (seasonal winter maxima) with superimposed, small rainfall runoff hydrographs. Small net export of water and some spray irrigation (trivial overall impact). On rare occasions levels are affected by the tide, although normal tidal limit is Hempholme.

The flow record

Gauge has always been prone to drop outs and spikes in data. Early records edited using derived ratings and constant shifts but since 2001 validation has been limited to gross error checks and spike removal only. Check gaugings typically compare well with EM gauge though and record is considered good. Full period of record peak flow data reviewed and released in September 2023 (WINFAP Files v12).

Descriptions from the National River Flow Archive (UKCEH). NRFA station record ↗

Gauge Details

How this gauging station is built and how long it has measured (NRFA / UKCEH).

Gauge type
Electromagnetic
Operating since
1988
Station datum
8.0 mAOD
Flow record
1988–2024 · 36 yrs · 97% complete
Peak-flow record
since 1988
Hydrometric area
26
Measured by
Environment Agency

Frequently asked questions

Is the West Beck at Wansford Snakeholm Lock flooding today?

The current level is 0.43m, which is within the typical range of 0.41 to 1.52m. Flooding is unlikely at this level.

Is the river level rising or falling at Wansford Snakeholm Lock?

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 West Beck at Wansford Snakeholm Lock?

The typical range at this station is 0.41m to 1.52m, based on Environment Agency historical data. Levels above 1.52m 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.

Embed this gauge on your website

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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:

Check any UK postcode’s flood risk →

🏠 Buying or renting around here? Get the Property Flood-Risk Report for any English postcode — official risk band, recorded floods, warning history, river behaviour and nearby storm overflows. £19 one-off. Learn more →