Tucson, AZ Initial Results 8/10/2011 – 8/15/2011 Relatively cloudy/variable days Model settings Domain 3 nests, Δx = 1.3 on inner nest Initialization 12 UTC, driven by NAM Clouds initialized by GOES Parameterizations Cloud Physics: Thompson PBL: YSU RTM: RRTM (Δt = 5 min.) Cumulus parameterization on outer nest only 5th order vertical diffusion Run time Intra-day (0-15 hours)

WRF-CLDDA has RMSE of up to 50% less than NAM Initial results WRF-CLDDA has RMSE of up to 50% less than NAM Only 1 tested day (8/10/11) produced results worse than the NAM Correct evaporation timing Afternoon cloud formation Date WRF RMSE (W m-2) RMSE Ratio To NAM 8/10/2011 301.5 1.34 8/11/2011 144.4 0.61 8/12/2011 137.4 0.59 8/13/2011 101.0 0.51 8/14/2011 142.9 0.54 8/15/2011 117.2 0.79