A Flood Alert was issued for Porter Brook Catchment in Sheffield on 27th August 2026. Affected watercourses included the Porter Brook.
During this event, FloodRadar monitoring gauges recorded notable rises. The Bagley Dike at Grimesthorpe rose 1.45m, peaking at 1.51m, while the River Sheaf at Highfield climbed 1.22m.
Environment Agency advice issued
Forecast high river levels today may lead to flooding. Flooding is possible on 27 August 2026 due to the heavy and thundery downpours expected today Locations most affected will be low lying land and roads near rivers. We are closely monitoring the situation as river levels may rise suddenly and cause surface water flooding. . Take care and avoid walking, cycling or driving through flood water . This message will be updated by 11:00PM on 27 August 2026 or as the situation changes.
Monitoring gauges during this event
| Station | River | Rise | Peak |
|---|---|---|---|
| Grimesthorpe | Bagley Dike | +1.45m | 1.51m |
| Highfield | River Sheaf | +1.22m | 1.34m |
| Sheffield Lady's Bridge | River Don | +0.85m | 1.24m |
| Sheffield Centenary Works | River Sheaf | +0.78m | 0.72m |
| Sheffield Station | Porter Brook | +0.56m | 0.63m |
| Malinbridge | River Loxley | +0.47m | 0.69m |
| Sheffield Meersbrook | Meers Brook | +0.42m | 0.91m |
| Sheffield Oakbrook Road | Porter Brook | +0.39m | 0.45m |
| Dore Twenty Well Lane | River Sheaf | +0.37m | 0.70m |
| Loxley Rowell Bridge | River Loxley | +0.09m | 0.16m |