Model Diagnostics Product Menu
Model Diagnostic Discussion
Model Verification
Model Biases
NCEP Synergy Meeting Highlights
Numerical Model Output
Model Diagnostic Discussion
The Model Diagnostic Discussion
NFDPMDHMD
describes performance attributes of the GFS and NAM models for the most recent 00Z or 12Z run.
For more information about this discussion, including recent changes and issuance deadlines, please read the
following detailed
product
description.
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
WPC 500-mb Height Pattern Graphics
These graphics supplement the Model Diagnostic Discussion by depicting the WPC preferred 500-mb geopotential height pattern every 12 hours from F36 through F84. The 500-mb height pattern from several numerical models can also be overlain with the WPC preferred pattern for comparison. These graphics are updated after the final issuance of the PMDHMD.
500-mb Height Pattern
Model Verification
The links below allow you to ascertain how well a model forecast has verified as a function of forecast
hour, cycle, and field. For some fields two map projections are provided, one over the CONUS, and a second over Alaska.
Model Biases
Model bias information is provided in two ways:
Subjectively (by compiling impressions from forecasters)
Objectively (by automated comparison of model forecasts to model initialization)
Subjective
List of Observed Model Biases
Interactive Objective Comparision of Model Biases
(Requires a frames-capable browser with JavaScript enabled. It is recommended that you have
a screen resolution of at least 1024x768 pixels.)
NCEP Synergy Meeting Highlights
Meetings between EMC, NCO, the NCEP Operational Centers, MDL, and NWS Regions are held routinely
to discuss short-term model implementation plans in concert with super computer and
communication system development. Operational feedback from users is incorporated into these plans.
Highlights
from the Latest Meeting
Archived Highlights
Minutes from May 6, 2013 Minutes from April 8, 2013 Minutes from March 4, 2013 Minutes from January 28, 2013 Minutes from December 3, 2012 Minutes from October 9, 2012 Minutes from August 8, 2012 Minutes from June 4, 2012 Minutes from May 7, 2012 Minutes from March 26, 2012 Minutes from February 6, 2012 Minutes from October 31, 2011 Minutes from September 26, 2011 Minutes from August 29, 2011 Minutes from July 25, 2011 Minutes from June 27, 2011 Minutes from May 23, 2011
Minutes from April 25, 2011 Minutes from March 28, 2011 Minutes from February 28, 2011 Minutes from January 31, 2011 Minutes from October 25, 2010 Minutes from September 27, 2010 Minutes from August 30, 2010 Minutes from July 26, 2010 Minutes from June 28, 2010 Minutes from May 24, 2010 Minutes from April 26, 2010 Minutes from March 29, 2010 Minutes from March 1, 2010 Minutes from January 25, 2010 Minutes from October 26, 2009 Minutes from September 28, 2009 Minutes from August 31, 2009 Minutes from August 3, 2009 Minutes from June 29, 2009 Minutes from May 26, 2009 Minutes from April 27, 2009 Minutes from March 30, 2009 Minutes from February 22, 2009 Minutes from January 05, 2009 Minutes from December 01, 2008 Minutes from November 03, 2008 Minutes from September 29, 2008 Minutes from August 25, 2008 Minutes from July 28, 2008 Minutes from June 30, 2008 Minutes from June 2, 2008 Minutes from May 5, 2008 Minutes from March 31, 2008 Minutes from February 25, 2008 Minutes from January 28, 2008 Minutes from December 31, 2007 Minutes from November 26, 2007 Minutes from October 29, 2007 Minutes from September 24, 2007 Minutes from August 27, 2007 Minutes from July 30, 2007 Minutes from June 4, 2007 Minutes from April 30, 2007 Minutes from April 2, 2007 Minutes from February 26, 2007 Minutes from January 29, 2007 Minutes from October 30, 2006 Minutes from August 14, 2006 Minutes from June 26, 2006 Minutes from May 30, 2006 Minutes from April 24, 2006 Minutes from February 27, 2006 Minutes from January 30, 2006 Minutes from November 28, 2005 Minutes from October 31, 2005 Minutes from September 26, 2005 Minutes from August 29, 2005 Minutes from July 25, 2005 Minutes from June 27, 2005 Minutes from May 23, 2005 Minutes from April 23, 2005 Minutes from March 28, 2005 Minutes from February 28, 2005 Minutes from January 31, 2005 Minutes from November 29, 2004 Minutes from October 25, 2004 Minutes from August 30, 2004 Minutes from July 26, 2004 Minutes from June 7, 2004 Minutes from April 27, 2004 Minutes from March 29, 2004 Minutes from March 1, 2004 Minutes from February 2, 2004 Minutes from December 3, 2003 Minutes from November 2, 2003 Minutes from September 30, 2003 Minutes from August 25, 2003 Minutes from July 29, 2003 Minutes from June 30, 2003 Minutes from April 28, 2003
Minutes from March 31, 2003
Minutes from January 6, 2003
Minutes from December 2, 2002
Minutes from October 28, 2002
Minutes from September 30, 2002
Minutes from July 29, 2002
Minutes from July 1, 2002
Minutes from May 28, 2002
Minutes from April 22, 2002
Minutes from March 25, 2002
Minutes from February 25, 2002
Minutes from January 28, 2002
Minutes from October 29, 2001
Minutes from September 24, 2001
Minutes from August 27, 2001
Minutes from July 30, 2001
Minutes from June 25, 2001
Minutes from April 30, 2001
Minutes from March 26, 2001
Minutes from February 26, 2001
Minutes from January 29, 2001
Numerical Model Output Links to sites with model output
Global Models
GFS
from NCEP EMC
Canadian
Global Model (courtesy of Environment Canada)
ECMWF
(courtesy of Unisys Weather)
NOGAPS
(courtesy of the Fleet Numerical Meteorology and Oceanography Center)
UKMET
Model (courtesy of the University of Wyoming)
Mesoscale Models Ensemble Forecasts
weather.gov 
