GetFeatureInfo results:

Layer 'GDPS.ETA_TT'
  Feature 0: 
    x = '-73.5'
    y = '45.45'
    value_0 = '12.683252'
    value_list = '12.683252'
    class = '10 15'
    red = '-1'
    green = '-1'
    blue = '-1'