CMAQ

    * Bug discovered and fixed in advection: potential instability

    * Bug discovered and fixed in advection: potentially incomplete advection

    * Bug discovered and fixed in horizontal diffusion: partial diffusion.

    * Potential problem discovered in horizontal diffusion: Smagorinsky formulation in Cartesian coordinates.

MCIP

    * Bug discovered and fixed in wind direction calculation: incorrect northerly and southerly winds

    * MCIP cannot process WRF output if it uses tangent Lambert projection: 1-hr WRF output file

WRF

    * Symptoms of instability