Evaluation of the Weather Research and Forecast Model Over Dugway, Utah, During 2009

Report No. ARL-TR-5032
Authors: Jeffrey Passner, Robert Dumais, Barbara Sauter, and Robert Flanigan
Date/Pages: November 2009; 68 pages
Abstract: The U.S. Army Research Laboratory (ARL) performed numerous case studies of the Advanced Research version of the Weather Research and Forecasting (WRF) model at horizontal resolutions of 3 and 1 km to better understand weather output for military use. ARL's devised model sensitivity experiments of several WRF parameterizations including the vertical resolution of 40, 60, and 80 levels, model time steps of 9 and 3 seconds, three different explicit microphysics, and the two planetary boundary layer options. Model output was studied for numerous different meteorological parameters, but most of the effort was aimed at analyzing surface features such as wind, temperature, moisture, and precipitation to better understand how the different parameterizations influenced the surface-based observations. Four diverse meteorological days were studied and statistical results showed little difference between each model simulation. However, significant differences in some of the meteorological variables and some model errors were discovered. These model discrepancies are discussed in detail.
Distribution: Approved for public release
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Last Update / Reviewed: November 1, 2009