3 rd annual wrf users workshop promote closer ties between research and operations develop an...
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3rd Annual WRF Users Workshop
Promote closer ties between research and operations
Develop an advanced mesoscale forecast and assimilation system
Design Priorities:
1-10 km horizontal grids
Portable and efficient on parallel computers
Advanced data assimilation and model physics
Well suited for a broad range of applications
Community model with direct path to operations
Overall WRF Goals:
WRF Project Collaborators Signatory Partners:
– NCAR Mesoscale and Microscale Meteorology Division– NOAA National Centers for Environmental Prediction– NOAA Forecast Systems Laboratory– Air Force Weather Agency– Federal Aviation Administration– Navy NRL Marine Meteorology Division
Additional Collaborators:– OU Center for the Analysis and Prediction of Storms– Department of Defense HPCMO
– NOAA Geophysical Fluid Dynamics Laboratory– NASA GSFC Atmospheric Sciences Division– NOAA National Severe Storms Laboratory– EPA Atmospheric Modeling Division– University Community
WRF Development Teams
Numerics and Software
(J. Klemp)
Data Assimilation (T. Schlatter)
Analysis and Validation
(K. Droegemeier)
Community Involvement
(W. Kuo)
Operational Implementation
(G. DiMego)
Data Handling and Archive (G. DiMego)
Regional Climate Modeling
(proposed)
Workshops, Distribution, and Support
(J. Dudhia)
Model Physics (J. Brown)
Atmospheric Chemistry (P. Hess)
Land Surface Models
(J. Wegiel)
Operational Requirements
(G. DiMego)
Operational Forecaster
Training (T. Spangler)
Ensemble Forecasting
(D. Stensrud)
Analysis and Visualization
(M. Stoelinga)
Model Testing and Verification
(C. Davis)
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Standard Initialization (J. McGinley)
3-D Var (J. Derber)
4-D Data Assimilation (D. Barker)
Dynamic Model Numerics
(W. Skamarock)
Software Architecture,
Standards, and Implementation (J. Michalakes)
24 October 2001 WRF forecast– 12 km Grid
(Michalakes, 2001)
24h WRF forecast valid 00Z 25 October 2001
WRF vertically integrated cloud water Satellite cloud image
25 Oct 18:30 UTC24 Oct 18:30 UTC
25 Oct 00 UTC 25 Oct 12 UTC 26 Oct 00 UTC24 Oct 12 UTC
WRF 12 km grid – Coastally Trapped Disturbance
Registered WRF Users (6/21/02)
WRF Principal Partners 75
NCAR 33 NCEP 16 FSL 13 OU/CAPS 4 AFWA 9
U.S. Universities 141U.S. Government Labs 91Private Sector 78
Foreign 342 ----
Total 727
WRF Web site: http://wrf-model.org
Development Task 2000 2001 2002 2003 2004 2005-08
Basic WRF model (limited physics, standard initialization)
Implementation and evaluation of alternative prototypes
Model physics Simple Research suite Advanced
Research quality NWP version of WRF
3D-Var assimilation systemBasic Research Advanced
4D-Var assimilation system, ensemble techniques
Basic Advanced
Testing for operational use at NCEP & AFWA
Diagnosis of operational performance, refinements
Release and support to community Operational deployment
Projected Timeline for WRF Project
24 h Forecast Precipitation, Valid 12Z 12 May 02
10 km ETA 22 km WRF
10 km WRF 8 km NHM
24 h RFC Analysis
1 10 100 km
Cumulus ParameterizationResolved Convection
LES PBL Parameterization
Two Stream Radiation3-D Radiation
Model Physics in High Resolution NWP
Physics“No Man’s Land”
Key Scientific Questions for Storm-Scale NWP
What is the predictability of storm-scale events, and will resolution of fine-scale details enhance or reduce their prediction?
What observations are most critical, and can high-resolution data (e.g. WSR-88D) from national networks be used to initialize NWP models in real time?
What physics is required, and do we understand it well enough for practical application?
How can ensembles be utilized for storm-scale prediction? What are the most useful verification techniques for storm and
mesoscale forecasts? What networking and computational infrastructures are needed to
support high-resolution NWP? How can useful decision making information be generated from
forecast model output?