A Flood Alert was issued for Groundwater flooding in Vernham Dean, Upton and the Bourne Valley in Hampshire on 24th February 2026. Affected watercourses included the Groundwater.
During this event, FloodRadar monitoring gauges recorded notable rises. The Groundwater Level at Everleigh rose 0.27m, peaking at 132.74m, while the Groundwater Level at Chapel Wood climbed 0.26m.
Environment Agency advice issued
High groundwater levels may lead to flooding. Flooding is possible . Mostly light rain (19mm) has fallen in the last week. At Vernham Dean, the groundwater level has started to stabilise. Flooding is affecting a small number of cellars in Upton. Septic tanks will also struggle to operate properly. On Tuesday 24/02/2026, Wednesday 25/02/2026 and Saturday 28/02/2026, the weather is expected to be dry. From Thursday 26/02/2026 into Friday, further rain (between 15 and 25mm) is forecast to affect Hampshire. If heavy rain affects the Bourne Valley, levels will rise for another 2 weeks. Cellar flo
Monitoring gauges during this event
| Station | River | Rise | Peak |
|---|---|---|---|
| Everleigh | Groundwater Level | +0.27m | 132.74m |
| Chapel Wood | Groundwater Level | +0.26m | 111.04m |
| Queen Manor Farm | Groundwater Level | +0.23m | 71.17m |
| Clarendon | Groundwater Level | +0.09m | 74.06m |
| Hazelberry Plantation | Groundwater Level | +0.09m | 126.97m |