Determining the Impact of Meteorological Assimilation Data Ingest System (MADIS) Observations on Weather Research and Forecasting (WRF) Forecasts Utilizing National Center for Atmospheric Researchs (NCARs) Forecast Sensitivity to Observations Software Package

Report No. ARL-TR-6697
Authors: Stephen F. Kirby
Date/Pages: October 2013; 34 pages
Abstract: The National Center for Atmospheric Researchs (NCAR's) Forecast Sensitivity to Observations software is employed to determine the impact of both surface and upper-air observations on Weather Research and Forecasting (WRF) forecasts during early February 2012. Scripts were engineered to execute both the WRF Preprocessing System and WRF code modules in order to generate 12- and 24-h forecasts. These forecasts served as input for the generation of a regional background error (BE) covariance tuned to the timeframe and region of interest, the southwestern U.S. This new BE covariance was used in a sensitivity study to determine the impact of observations on the WRF forecast. Observation types included surface observations such as mesonet, meteorological terminal aviation routine weather report (METAR), and ship reports while the upper-air observations included profiler, balloon soundings, satellite, and pilot reports.
Distribution: Approved for public release
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Last Update / Reviewed: October 1, 2013