Extended Abstract (1.6M)15A.3
Wind Gust Speed Analysis in RTMA
Yanqiu Zhu, NOAA/NWS/NCEP/EMC, Camp Springs, MD; and G. DiMego, J. Derber, M. Pondeca, G. Manikin, R. Treadon, D. Parrish, and J. Purser
The Real-Time Mesoscale Analysis (RTMA) is a NOAA-NWS gridded surface
analysis system developed at the Environmental Modeling Center (EMC) of
the National Centers for Environmental Prediction in collaboration with the Global
Systems Division (GSD) of the Earth System Research Laboratory (ESRL). One
of its important applications is to provide a comprehensive set of high spatial and
temporal resolution analyses that can be used to monitor potential severe weather
events. In this work, wind gust speed is added as a new control variable in the
RTMA, and the gust observations from various sources, especially Mesonet
data, are examined and assimilated over the CONUS region. Wind gust
background fields are generated by downscaling of Rapid Update Cycle
(RUC) 1h forecasts, and terrain-following anisotropic background error
covariances are utilized in the RTMA's 2DVar procedure. Preliminary
analysis results and experiments will be presented at the conference.
Session 15A, Data Assimilation: RTMA and Rapid Refresh
Thursday, 4 June 2009, 1:30 PM-3:00 PM, Grand Ballroom East
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