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Co-Investigators: Joe Klemp, Bill Skamarock, John Michalakes, Jimy Dudhia, Jordan Powers, Dave Gill, Mo

WRF/ARW User Participation . 9/13/06 June 2006 Registered Workshop Users Participants Principal Partners

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Co-Investigators: Joe Klemp, Bill Skamarock, John Michalakes, Jimy Dudhia, Jordan Powers, Dave Gill, Mo

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    4. Recent Advances in WRF/ARW Enhanced performance in parallel computing Numerous new and updated physics packages A new WRF Preprocessing System for model initialization Moving 2-way interacting nests WRF integration with Earth System Modeling Framework Modifications for Nested Regional Climate applications Real-time forecasting experiments for convective systems and landfalling hurricanes

    9. Moisture Transport in ARW

    11. ARW test with PD scheme (24 h forecast)

    14. Digital Filter Initialization (DFI) for WRF (X.-Y. Huang, M. Chen, J.-W. Kim, W. Wang, Project funded by KMA and BMB)

    15. Digital Filter (DFL) Test Results

    17. Plans for 2006 Real-time WRF-ARW Hurricane Forecasts Add 2nd nested domain with 1.33 km grid Add ocean mixed layer for feedback on ocean surface temperature Add 12 h EnKF assimilation of hurricane position, intensity, and satellite winds

    19. New Model Features for WRF V2.2 New WRF Preprocessing System (WPS) Urban canopy model as part of NOAH LSM (with Mukul Tewari, RAL, Hiroyuki Kasaka, CRIEPI, JAPAN) Grid nudging FDDA (with Dave Stauffer & A.-J. Deng, PSU) Obs nudging FDDA (with Yubau Liu and others, RAL) New Thompson et al (2006) microphysics (with Greg Thompson, RAL) and CAM 3.0 radiation (with CGD) packages Positive-definite advection scheme for scalars Improved post-processing (GrADS, NCL, RIP)

    20. Ongoing Work for future WRF Releases Double moment microphysics packages Laura Fowler (CSU) Axel Siefert (DWD) Bill Hall (NCAR) Physics for high-resolution applications Bin microphysics (Barry Lynn, HUJI) Large-eddy PBL scheme (Chin-Hoh Moeng, NCAR) Porting physics from (NASA-Goddard, NRL-COAMPS, EPA) Digital filter for model initialization Coupling to CCSM’s CLM land-surface model Port to Microsoft Windows operating system

    21. Priority WRF Research and Development for High-Resolution NWP Refinement of unified 3D-Var, 4D-Var, EnKF data-assimilation system and integration into high-resolution forecast process Advanced physics for convection-resolving applications More accurate treatment of ice/liquid species in cloud microphysics Improved subgrid turbulence/PBL for scales larger than LES High-resolution land-surface processes Shallow cumulus parameterization for convection initiation? New verification techniques for high-resolution forecasts

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