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         MISSION / VISION    |    About EMC

EMC > GLOBAL BRANCH > GFS > PERFORMANCE
GLOBAL FORECAST SYSTEM
The Environmental Modeling Center continuously monitors its NWP model performance against different performance measures, and against its 'competition' from other global forecast centers. Click (+/-) to see more information.

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OPERATIONAL

NCEP/EMC Global Model Performance Statistics link
Global Model Performance Statistics (longer record) and Daily Weather Maps link / maps
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SEMI-OPERATIONAL

Diagnostics of the Performance of the NCEP Operational Global Analysis/Forecast System (+/-)

(verified against analyses)

Includes text explaining graphic display of model diagnostics, and monthly diagnostics from October 1998 to last completed month.

Includes diagnostics for dynamical variables:
    • Zonal Mean Height and Temperature Errors
    • Regional Temperature Errors
    • Vertical Cross-sections of Temperature Errors>
    • Temperature Errors and Diabatic Heating
    • Regional Height Errors
    • Zonal Wind Errors
    • Meridional Wind Errors
    • Vector Wind Errors
    • Vertical Motion Errors
    • Horizontal Wind Divergence
    • A Measure of the Noise: Squared Divergence>
    • Forecast Bias In Specific Humidity and physical processes:
      • Precipitation
      • Surface Air Temperature
      • Precipitable Water
      • Zonal Surface Stress
      • Low Cloud Cover
      • Total Cloud Cover
      • Evaporation
      • Sensible Heat Flux
      • Surface Net Shortwave
      • Surface Net Heat Flux
link
GFS verified against RAOBS (+/-)

link
Comparison of GFS output grid data to observations (+/-)

link
Monthly Archive of NCEP/EMC Model Performance Maps link
WAFC Washington Performance Indicators link
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ANNUAL REVIEWS

2013 GFS Performance Review pdf
2012 GFS Performance Review pdf
2011 GFS Performance Review ppt
2009 Review of GFS Forecast Skill ppt
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PAST

Long-Term Performance Statistics for Multiple NWP Models
link
GFS Performance 1984-2006 Against Reanalysis ppt
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EXPERIMENTAL

Verifications of GFS parallel experiments

Q1FY15 GSM 12.0.0 pre-implementation parallel - prhw14 real-time



link
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IMPLEMENTATIONS

See GFS Implementations tab