The authors want to express their gratitude to NOAA/NCEP for providing the NMM source code. The scientific discussion with Zavisa Janjic of NCEP and all his help concerning the NMM were crucial for this research. This work substantially benefited from the comments and suggestions made by the anonymous reviewers. The support of Matthew Pyle of NCEP was very helpful. Thanks to Martin Jacquot of the University of Basel for reconfiguring the Beowulf cluster to run NMM. The authors also want to thank SLF and MeteoSwiss for providing measurement data.
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