River Severn at Worcester · Diglis gauge
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River level timeline
Diglis · metres above station datum · UK time
Nearby monitoring stations
River Severn and River Teme gauges, upstream to downstream. Each gauge uses its own datum — compare trends and position in range, not raw numbers.
River explorer map
Layers
Stations on the map
Keyboard-friendly list. Select a station to fly to it and open its details.
Analysis
How the river is behaving
Five linked views of the recorded data. Hover for exact readings, drag the timeline handles to zoom, and download any dataset.
Multi-station comparison
Why compare in different ways? (station datums explained)
- Stage — each gauge’s height above its own local datum. Raw numbers are not comparable between gauges.
- Change — centimetres gained or lost since the start of the window. Good for comparing timing of rises.
- % of typical range — 0% = EA typical low, 100% = EA typical high for that gauge. Datum-independent; the best like-for-like comparison.
- Derived mAOD — stage + the EA “stage-scale datum”, which the EA API documents as the gauge’s datum on Ordnance Datum. Derived here, not published as a reading; useful for seeing the water surface fall downstream (e.g. over Diglis weir).
Level gauge
Latest reading against EA reference levels for the gauge.
Where each gauge sits in its typical range
Latest reading as % of the EA typical range. Click a bar to focus that station.
Rate of change
How fast the recorded level is rising (amber) or falling (blue), in centimetres per hour, from readings one hour apart.
Each bar compares a reading with the one closest to 60 minutes earlier (within 10 min). Missing readings leave gaps; values are not interpolated.
Rainfall and river level
Hourly rainfall at an EA rain gauge (hanging bars) above the river level. Rivers respond to rain over the whole catchment, often hours to days later.
Rain totals use only complete hours (all four 15-minute readings present); missing hours stay blank rather than zero. A single gauge measures rain at one point and does not represent the whole Severn catchment.
Scenario simulator
“If the level kept changing at a constant rate, when would it reach each reference level?” Real rivers do not behave linearly.
Explore mode
Investigate the record yourself
Pick stations and dates, scrub or play through time, pin notes on the chart, then share the exact view with a link.
Recorded river levels
Linked map
Hover a marker to highlight its line; hover a line to highlight its marker. During playback, markers show each gauge at the playhead.
What happened in this window
Select an insight to zoom the chart to it.
Historical explorer
Past rises and falls since 2000
Daily maximum levels from the Environment Agency hydrology archive (quality-flagged). Compare major past events with each other and with today.
Every day since 2000
Daily maximum stage. Numbered dots are the largest independent events (at least 14 days apart). Drag the handles or brush to zoom.
Largest recorded events
Tick events to overlay them. Select a date to zoom the long-term chart.
Event comparison
Daily maxima aligned on each event’s peak day.
Year at a glance
Each square is one day, coloured by its maximum level.