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Storm Fionn

16–17 January 2018 · 2017-18 season · named by Met Eireann · Ireland, Scotland

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27flood warnings & alerts (England)
A deep Icelandic low affecting western Ireland and Scotland with strong winds, snow and ice but limited overall damage; naming was somewhat controversial as the UK/Ireland impact was modest.

Flood footprintEnvironment Agency warning history, England · storm total

0severe warnings
0flood warnings
27flood alerts
17areas
15counties
14rivers & seas

Counted from the Environment Agency's warning record for England (15–17 January 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.

Worst-hit areas

  • North Sea Coast at Bridlington4
  • Somerset coast at Porlock Weir3
  • The tidal River Waveney from Ellingham to Breydon Water3
  • The tidal River Yare, from Thorpe St Andrew to Breydon Water3
  • Exmoor Rivers2
  • Coast at Lytham St Annes1

Counties

  • Somerset6
  • Norfolk6
  • East Riding of Yorkshire5
  • Lancashire5
  • Devon4
  • Cornwall3

Rivers & seas

  • North Sea5
  • Bristol Channel3
  • Irish Sea3
  • River Yare3
  • Waveney3
  • River Barle, River Exe, River Lyn, River Mole, River Bray2

Flood mapthe storm's flood footprint

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.

The rainstorm-total by gauge

GaugeTotal mm
Bellever Dartmoor 82.1
Langsett 73.2
Marsden Butterley 72.2
Ringinglow 69.8
Broadhead Noddle 69.0
Great Wolden Edge No.2 68.4
Dore 67.6
Kinder Filters 66.9
Greenfield 65.6
Redmires 64.2
White Barrow 64.0
Gorpley 63.2

The riverspeak vs warning level

StationPeak% of warning
Ferrybridge Fishergate · Wash Dike 0.77 m 365%
Silsden · Silsden Beck 0.28 m 262%
Wensor Bridge, Shelton · River Devon 4.17 m 245%
Shipley · Bradford Beck 0.93 m 233%
Whitewater Bridge · River Maun 1.76 m 219%
Mytholmroyd Dauber Bridge · Cragg Brook 0.65 m 213%
Sprotbrough · River Don 2.32 m 207%
Hundred House Bridge · Royal Military Canal 0.90 m 197%
Calder Hall · River Calder 1.01 m 196%
Mansfield The Dykes · River Maun 1.94 m 194%
Fenton Dam · Bushy Beck 3.11 m 190%
Cononley · River Aire 1.96 m 185%

Gauge records cover 15–18 January 2018 (the storm window ± a day). Frozen 3 Jul 2026.

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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.