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1.02

Flash Bridge

Cranleigh Waters
Wey catchment • Alfold Crossways • Surrey • ID: 3061TH • Level
(23m ago) • 4 readings/hr • 128 views

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⤴ Unusual rise — FloodRadar+Top 1% rise rate for this gauge.
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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
1.022 mASD
▬ Steady
24h Max
1.028 mASD
24h Min
1.008 mASD
Typical Range
0.96 - 3.00
mASD
Highest Recorded
3.95 mASD
EA official record
4.22 in our data (since Mar 1997)
Current level is 26% of this
🚽 Sewage overflows nearby

Recent Water Levels

🌍 floodradar.co.uk
1 day

Recent Readings

Falling · -0.4 cm over 5h
09 Oct 07:30 ▬ steady 1.022 mASD
09 Oct 07:15 ▬ steady 1.023 mASD
09 Oct 07:00 ▬ steady 1.023 mASD
09 Oct 06:45 ▼ -0.1 cm 1.023 mASD
09 Oct 06:30 ▲ +0.1 cm 1.024 mASD
09 Oct 06:15 ▬ steady 1.023 mASD
09 Oct 06:00 ▼ -0.1 cm 1.023 mASD
09 Oct 05:45 ▬ steady 1.024 mASD
09 Oct 05:30 ▬ steady 1.024 mASD
09 Oct 05:15 ▬ steady 1.024 mASD
09 Oct 05:00 ▬ steady 1.024 mASD
09 Oct 04:45 ▬ steady 1.025 mASD
09 Oct 04:30 ▬ steady 1.025 mASD
09 Oct 04:15 ▬ steady 1.025 mASD
09 Oct 04:00 ▬ steady 1.025 mASD
09 Oct 03:45 ▬ steady 1.025 mASD
09 Oct 03:30 ▼ -0.1 cm 1.025 mASD
09 Oct 03:15 ▬ steady 1.026 mASD
09 Oct 03:00 ▬ steady 1.026 mASD
09 Oct 02:45 1.026 mASD

Station Details

  • Monitoring Station: Flash Bridge
  • Watercourse: Cranleigh Waters
  • Nearest Town: Alfold Crossways
  • County: Surrey
  • Coordinates: 51°7'19"N 0°30'37"W (51.121978, -0.510356)
  • Open in: Google Maps · Apple Maps (opens your maps app)
  • Date Opened: 1 Jan 1996
  • Status: Active
  • Station Type: River level station
Technical details: references, datum, range, flow archive
  • Station Reference: 3061TH
  • RLOI id: 7233 (the EA's check-for-flooding station id)
  • EA Gauge ID: 3061TH-level-stage-i-15_min-mASD
  • Parameter: Level
  • Unit: mASD
  • Typical rise rate: 2 cm/hr (p95 sustained over 90 days)
  • Typical data delay: ~22 min (measured reading→publication lag)
  • Tidal: No
  • Lock / structure: No
  • Catchment Area: Wey
  • Typical Range: 0.958 – 3.000 mASD
  • EA Cross-check: 1.02 mASD (EA at 9 Oct 07:15)

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 downstream

Nearby

💧 Storm overflows upstream of this gauge

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.

2 storm overflows are traced upstream of this gauge, the nearest 7.9 km away along the river. None of their monitors has a current status (offline, or no report in the last 2 hours), so whether any is discharging is not known.

💧
Thames Water · into Thornhurst Brook · 7.9 km upstream along the river
13 spills · 82 hours in 2025
Monitor offline: it cannot say whether it is discharging
💧
Thames Water · into Cobbler's Brook · 12.0 km upstream along the river
9 spills · 63 hours in 2025
Monitor offline: it cannot say whether it is discharging

Nearby, connection not known

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

💧
Thames Water · into Trib Of Cranleigh Waters · 2.1 km away in a straight line · several watercourses close by, nothing to choose between them
16 spills · 183 hours in 2025
Monitor offline: it cannot say whether it is discharging
💧
Thames Water · into Cranleigh Waters/Littlemead · 2.3 km away in a straight line · its recorded watercourse is not the one mapped beside it
9 spills · 70 hours in 2025
Not discharging now · last
💧
Thames Water · into Cranleigh Waters · 3.3 km away in a straight line · no mapped watercourse close enough to be sure
3 spills · 11 hours in 2025
Monitor offline: it cannot say whether it is discharging
💧
Southern Water · into Tributary Of River Arun · 5.7 km away in a straight line · not connected to this gauge on the river map
13 spills · 88 hours in 2025
Not discharging now · last
💧
Southern Water · into Loxwood Stream · 5.8 km away in a straight line · not connected to this gauge on the river map
30 spills · 321 hours in 2025
Not discharging now · last

2 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 →

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 3.00 m on about 5 days. This year so far: 6 days.

2026 6 days so far
2025 6 days
2024 7 days
2023 8 days
2022 2 days patchy data
2021 6 days
2020 8 days
2019 7 days
2018 0 days
2017 0 days

Counted from each day's highest reading. Days with missing or implausible readings are left out, so a year marked patchy may have run high more often than shown.

Flood history near this gauge

Official Environment Agency warnings issued since 2012 for the 6 flood areas linked to this gauge (nearest 2.5 km away).

7flood warnings 143flood alerts

Most recent flood warning: 2 Nov 2023 — Loxwood, Brewhurst and Drungewick on the River Lox

Year by year
YearWarningsAlerts
2026 0 8
2025 0 9
2024 0 16
2023 1 11
2022 0 9
2021 1 15
2020 3 13
2019 0 11
2018 0 6
2017 0 7
2016 0 10
2015 0 6
2014 0 8
2013 2 6
2012 0 8

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 Alfold Crossways flood history.

Flood areas linked to this gauge

Flood warnings and alerts are issued for whole areas. These are the 6 areas linked to this gauge, nearest first.

Rain upstream

This gauge has no rain model of its own, but it usually follows Shalford: when about 10mm of rain falls near Shalford in 12h, this gauge usually starts rising about 75 minutes later.

Recent rain upstream: 0.4mm/12h — below Shalford's usual trigger.

Record: this held 8 of 10 times (past storms) · rain gauge: Rainfall station

Experimental, from historical rain and river data. Not an official flood warning.

Frequently asked questions

Is the Cranleigh Waters at Flash Bridge flooding today?

The current level is 1.02m, which is within the typical range of 0.96 to 3.00m. Flooding is unlikely at this level.

Is the river level rising or falling at Flash Bridge?

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 Cranleigh Waters at Flash Bridge?

The typical range at this station is 0.96m to 3.00m, based on Environment Agency historical data. Levels above 3.00m 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:

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 →