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Tucson, AZ Initial Results 8/10/2011 – 8/15/2011 Relatively cloudy/variable days Model settings

Tucson, AZ Initial Results 8/10/2011 – 8/15/2011 Relatively cloudy/variable days Model settings Domain 3 nests, Δ x = 1.3 on inner nest Initialization 12 UTC, driven by NAM Clouds initialized by GOES Parameterizations Cloud Physics: Thompson PBL: YSU RTM: RRTM ( Δ t = 5 min.)

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Tucson, AZ Initial Results 8/10/2011 – 8/15/2011 Relatively cloudy/variable days Model settings

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  1. 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)

  2. Correct evaporation timing 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 Afternoon cloud formation

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