Model Diagnostics
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Model Verification

Model Biases

NCEP Synergy Meeting Highlights

Numerical Model Output


NAM and GFS Model Trend Graphics

These graphics supplement the Model Diagnostic Discussion by comparing 500-mb geopotential height and sea level pressure every 6-h from F00-F84 from the most recent 00Z or 12Z NAM and GFS model runs to output from the model initialized 12 hours and 24 hours earlier. Difference fields between the current and older runs can also be displayed.
NAM 500-mb Height
NAM Sea Level Pressure
GFS 500-mb Height
GFS Sea Level Pressure


Model Biases

Model bias information is provided in two ways:
  1. Subjectively (by compiling impressions from forecasters)
  2. Objectively (by automated comparison of model forecasts to model initialization)

Subjective List of Observed Model Biases

Interactive Objective Comparision of Model Biases
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NCEP Synergy Meeting Highlights

Meetings between EMC, NCO, the NCEP Operational Centers, MDL, and NWS Regions were held routinely to discuss short-term model implementation plans in concert with super computer and communication system development. These meetings were discontinued after May, 2019 as the information was readily available through other resources.
 
Archived Highlights
 

Numerical Model Output
Links to sites with model output