HomeUK Storms › Storm Arwen
Archive Cat 4 · Severe

Storm Arwen

25–27 November 2021 · 2021-22 season · named by Met Office · Scotland, England, Northern Ireland, Wales

110 mphmax gust
36flood warnings & alerts
3UK deaths
A rare red wind warning storm driven by unusually destructive northeasterly winds; gusts to ~110mph felled an estimated eight million trees and cut power to over 200,000 homes across Scotland and north-east England. Impact was overwhelmingly wind/structural rather than flooding.

Flood footprintstorm total

0severe warnings
13flood warnings
23flood alerts
28areas
16counties
12rivers & seas

Worst-hit areas

  • North Sea at Sandsend2
  • North Sea at Scarborough - North Bay2
  • North Sea at Scarborough - Sandside2
  • North Sea coast at Bridlington2
  • North Sea coast at Skipsea, Hornsea and Mappleton2
  • North Sea coast at Withernsea, Easington and Kilnsea2

Counties

  • North Yorkshire20
  • East Riding of Yorkshire10
  • Redcar and Cleveland5
  • Norfolk3
  • Hartlepool2
  • Leicestershire2

Rivers & seas

  • North Sea24
  • River Seven2
  • Avon, Swift, Claycoton1
  • Bure, Ant, Thurne1
  • Humber Estuary, Winestead Drain1
  • North Sea, River Esk1

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.

The rainstorm-total by gauge

GaugeTotal mm
Embsay 59.2
Woodhead 53.7
Grimston 53.6
Mickleden Middle Fell Farm 49.6
Wallington 49.4
Font 47.6
Tunstall 43.6
Newbiggin 42.8
Tittesworth 42.8
North Walsham 41.8
Marsden Butterley 40.8
Gorpley 40.6

The riverspeak vs warning level

StationPeak% of warning
Clifton Hall · River Mease 5.42 m 366%
Middlesbrough Albert Park Footbridge · Marton West Beck 0.56 m 365%
Ferrybridge Fishergate · Wash Dike 0.73 m 342%
Skipton Eller Beck · Eller Beck 2.05 m 274%
Nunnington · River Riccal 0.99 m 225%
Dalton · Cod Beck 3.64 m 204%
Broadway Foot · River Rye 0.79 m 197%
Wensor Bridge, Shelton · River Devon 3.28 m 193%
Rowlands Gill · River Derwent 0.61 m 192%
Weetwood Bridge · River Till 2.07 m 183%
Ashford in the Water · River Wye 1.37 m 182%
Cherry Farm · Hodge Beck 0.78 m 172%

Gauge records cover 24–28 November 2021 (the storm window ± a day). Frozen 3 Jul 2026.

Storm Evert All UK storms Storm Barra

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.