1. Brief  description:

Some coastal grid points may display unrealistic Tmax values. All of  the spurious Tmax points are flagged as being ocean points based on the atmosphere land-sea mask.

2. Recommendation:

To eliminate the spurious values, use Tmax  over land points only,  based on POAMA's* land sea mask .

* POAMA stands for Predictive Ocean Atmosphere Model for Australia.