PowerCast: Mining and Forecasting Power Grid Sequences Hyun Ah Song1, Bryan Hooi2, Marko Jereminov 3, Amritanshu Pandey, Larry Pileggi3, and Christos Faloutsos1 1 School of Computer Science 2 Department of Statistics 3 Deptartment of Electrical and Computer Engineering Carnegie Mellon University fhyunahsg, fbhooi, mjeremin, amritanp, pileggig,