Prehen Rainfall ForecastUnited KingdomNIDerryPrehenToday 16 May35%Fri 17 May15%Sat 18 May15%Sun 19 May10%Mon 20 May35%Tue 21 May35%Prehen rainfall forecast issued today at 1:38 am. Next forecast at approx. 3:38 pm.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Castor Bay (Lurgan) RadarNational SatelliteNational SynopticGet an account to remove ads