Auxiliary Material for Paper (#2013GL057427R) entitled "Genesis of Hurricane Sandy (2012) Simulated with a Global Mesoscale Model" by B.-W. Shen1,2, M. DeMaria3, J.-L. F. Li4, S. Cheung5 1UMCP/ESSIC, 2NASA/GSFC, 3NOAA/NESDIS, 4CalTech/JPL, 5NASA/ARC Geophysical Research Letters 1 Introduction The electronic supplemental materials contain four sections with two tables and ten figures to provide the following discussions. Displacement and intensity errors from the forecasts initialized at 00Z Oct. 22-26 (10/22-10/26) are discussed with Table S1 and Fig. S1 in section 2. The middle- and upper-level flows as revealed by the global reanalysis and the 10/23 run are shown in Figs. S2-S3. Wavelength and phase speeds of the wave-like disturbance(s) are are analyzed and compared with the linear dispersion relation of MRG and ER waves in Figs. S4-S5 of section 3. Genesis simulations from two additional runs (i.e., 10/14 and 10/15 runs) are displayed in Figs. S6-S7. Parallel experiments with cumulus parameterizations (CPs) are discussed with Figs. S8-S10 in section 4. Section 2-4: supplemental materials (in pdf) Fig. S1: FigureS1.pdf Fig. S2: FigureS2.pdf Fig. S3: FigureS3.pdf Fig. S4: FigureS4.pdf Fig. S5: FigureS5.pdf Fig. S6: FigureS6.pdf Fig. S7: FigureS7.pdf Fig. S8: FigureS8.pdf Fig. S9: FigureS9.pdf Fig. S10: FigureS10.pdf