1. A method for compressor health monitoring comprising: receiving a plurality of turbine data points, wherein each of the turbine data points comprise one or more operating parameters and at least one of a compressor discharge temperature (CTD), and one or more performance parameters; categorizing the turbine data points into a plurality of bands based on the one or more operating parameters; computing a baseline variability measure of at least one of the CTD and the one or more performance parameters, for each of the plurality of bands over a first time window; computing a current variability measure of at least one of the CTD and the one or more performance parameters, for each of the plurality of bands over a second time window, wherein the second time window is shorter than the first time window; comparing the baseline variability measure and the current variability measure; and generating an alarm indicator if the current variability measure deviates from the baseline variability measure by a predefined difference.