Abstract
A hydrostatic model is applied to a case study from the Pyrenean field experiment PYREX. The results from this simulation are compared with measurements, with the aim to evaluate the model behaviour in the case of a flow past a steep orography. The initial and boundary data, which were used for the simulation, were produced with the T213 reassimilation system at Reading by the European Center for Medium-Range Weather Forecasts (ECMWF). The comparison of the results with observations show that the local wind systems are captured reasonably well by the model. In particular the evolution of two counter rotating eddies in the lee of the Pyrenean mountain range are simulated correctly in space and time. Also the calculated orographic drag and vertical wave momentum flux agreed well with the measurements.
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