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20–21 September 2018 · 2018-19 season · named by Met Office · England, Wales
Counted from the Environment Agency's warning record for England (19–21 September 2018). Welsh warnings are held in a separate record and are not counted here, and FloodRadar only began recording Scottish warnings on 16 September 2026 because SEPA publishes no archive. So this is England's share of the storm, not its total.
Red/amber rings mark rivers that reached or came close to their own high level during the storm — the most direct evidence of likely flooding (the gauge measures the river, not any one property). Solid dots mark each flood area's reference point, coloured by the most severe warning raised there — a warning means flooding was expected. Shaded shapes are the Environment Agency's recorded flood outlines: land actually observed flooded, published retrospectively (updated quarterly). England data only. An unshaded area means no flood was mapped here, which is not evidence none happened: the Environment Agency mapped only some floods, mapping effort rose sharply after about 2000, and surface-water flooding is largely absent from this record.
| Gauge | Total mm |
|---|---|
| Aldon | 132.4 |
| Hollinsclough | 102.8 |
| Ilfracombe Hore Down | 101.8 |
| West Dunkery | 100.4 |
| Longcliffe | 100.0 |
| Parkham | 91.6 |
| White Barrow | 91.0 |
| Ashbourne | 87.2 |
| Barbrook | 86.0 |
| Ashford Hall | 85.4 |
| Oareford | 83.8 |
| Redmires | 81.6 |
| Station | Peak | % of warning |
|---|---|---|
| Wensor Bridge, Shelton · River Devon | 5.38 m | 316% |
| Brookhouse Farm · Ford Green Brook | 2.56 m | 270% |
| Whitewater Bridge · River Maun | 2.13 m | 266% |
| Marshfield Bridge · Valley Brook | 1.43 m | 258% |
| Arle · River Chelt | 1.61 m | 244% |
| Quixhill · River Churnet | 1.87 m | 237% |
| Calthorpe Park · River Rea | 0.93 m | 225% |
| Kielder Butteryhaugh · River North Tyne | 1.25 m | 223% |
| Waterhouses · River Hamps | 1.02 m | 220% |
| Church Wilne · River Derwent | 3.47 m | 217% |
| Bescot · River Tame | 2.69 m | 216% |
| Shifnal · Wesley Brook | 0.51 m | 213% |
Gauge records cover 19–22 September 2018 (the storm window ± a day). Frozen 3 Jul 2026.
FloodRadar compiles Environment Agency warning history, gauge data and public reporting. It is not an emergency service and does not replace official flood warnings — always follow official guidance during a storm.
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