We thank Fred Conway of the Atmospheric Environment Service (AES) for arranging financial support,  providing data and helping with the access to the NEC-SX4 supercomputer of Environment Canada. NEC usage was arranged through Ontario Ministry of the Environment. Technical support for MC2 from David Sills of King City Radar, Stephane Belair and Yves Delages of Recherche en Prevision Numerique (RPN) of AES is gratefully acknowledged.