Alwen Reservoir Rainfall ForecastUnited KingdomWLConwyAlwen ReservoirToday 16 Sep100%Wed 17 Sep95%Thu 18 Sep90%Fri 19 Sep80%Sat 20 Sep80%Sun 21 Sep60%Mon 22 Sep15%Alwen Reservoir rainfall forecast issued today at 7:36 pm. Next forecast at approx. 9:36 am.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Clee Hill (Shropshire) RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads