David Dowell
National Center for Atmospheric Research, Boulder, CO
29 April 2009, 2:00 PM
National Weather Center, Room 5600
120 David L. Boren Blvd.
University of Oklahoma
Norman, OK
Directions to the NWC (.pdf, 60 kb)
Three isolated convective storms have been simulated by assimilating Doppler velocity observations into the Weather Research and Forecasting (WRF) model. These storms, which were observed during the STERAO and STEPS field projects in 1996 and 2000, include ordinary cells, multicells, and supercells. The simulations are evaluated with independent observations: total ice masses estimated from polarimetric radar observations and updraft volume estimated from dual-Doppler wind syntheses. The sensitivity of the simulations to the hail/graupel parameters in the LFO single-moment bulk microphysics scheme is investigated. Also, attempts to parameterize total lightning from the model state are evaluated with available observations.
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