| Session 11 | 
|  | Ensembles | 
|  | Organizer: Richard H. Grumm, NOAA/NWSFO, State College, PA 
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|  | 10:30 AM | 11.1 | An Examination of Regional Ensemble Forecasting Techniques during three Winter Storms   Richard H. Grumm, NOAA/NWS, State College, PA; and R. Hart
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|  | 10:45 AM | 11.2 | Flow Dependent Background Error Covariance and Mesoscale Predictability Estimation through Ensemble Forecasting   Fuqing Zhang, Texas A&M University, College Station, TX; and J. Ham and A. Aksoy
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|  | 11:00 AM | 11.3 | Effects of nesting frequency and lateral boundary perturbations on the dispersion of limited-area ensemble forecasts   Paul Nutter, CIMMS/Univ. of Oklahoma, Norman, OK; and D. Stensrud and M. Xue
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|  | 11:15 AM | 11.4 | Mesoscale Ensemble Prediction of Tropical and Mid-latitude Cyclones   Mohan K. Ramamurthy, University of Illinois, Urbana, IL; and B. F. Jewett, B. Cui, and H. Liu
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|  | 11:30 AM | 11.5 | Results of using the PSU shallow convection scheme in an ensemble mode: Effects on mass flux profiles and thermodynamic tendencies   Ricardo C. Muņoz, Penn State Univ., University Park, PA; and N. L. Seaman, D. R. Stauffer, and A. Deng
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|  | 11:45 AM | 11.6 | Using adjoint-derived forecast sensitivities to characterize forecast uncertainty   Michael C. Morgan, University of Wisconsin, Madison, WI; and D. T. Kleist and G. A. Postel
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