Wave runup predictions at this site are made with LiDAR-derived foreshore beach slope extending from MSL to MHW at MOP transect L0899. Offshore wave conditions are extracted from the CDIP Topanga Nearshore Buoy (103) in 20m (67 ft) water depth. Forecasted waves include mean setup and time-variable swash motions, following Stockdon et al. 2006, equation 19, averaged at three-hour forecast intervals. The flood threshold (red line) is taken to be the vertical measurement (MLLW datum) of the nearby lifeguard station. Observed waves for this plot are derived with the ‘nowcast’ CDIP wave products.