For Alton Water Reservoir : No gale warning.
The reliability of the situation is very good.
Sunny spells with possibility of mist forming in the morning, sunny in the afternoon. No precipitation.
In the evening, clear skies. NNE force 2 turning E force 3 in the middle of the day then ENE. Gusts reaching 17 knots in the middle of the day. Visibility reduced by mist becoming excellent in the middle of the day then good.