Interesting!

What does RED mean guys? A couple of other METARS had WHT or GRN at
the end, that too?


.... they are airfield 'fitness' colours, used by military:

From BLU best, through WHT GRN YLO (1 and 2), AMB and RED. I'll try and
find a link to the definitions, though someone may beat me to it!

Martin.