Skip Navigation Links 
NOAA logo - Click to go to the NOAA homepage National Weather Service   NWS logo - Click to go to the NWS homepage
The Weather Prediction Center



Follow the Weather Prediction Center on Facebook Follow the Weather Prediction Center on Twitter
NCEP Quarterly Newsletter
WPC Home
Analyses and Forecasts
   National High & Low
   WPC Discussions
   Surface Analysis
   Days ½-2½ CONUS
   Days 3-7 CONUS
   Days 4-8 Alaska
   Flood Outlook
   Winter Weather
   Storm Summaries
   Heat Index
   Tropical Products
   Daily Weather Map
   GIS Products
Current Watches/

Satellite and Radar Imagery
  GOES-East Satellite
  GOES-West Satellite
  National Radar
Product Archive
WPC Verification
   Medium Range
   Model Diagnostics
   Event Reviews
   Winter Weather
International Desks
Development and Training
WPC Overview
   About the WPC
   WPC History
   Other Sites
Meteorological Calculators
Contact Us
   About Our Site is the U.S. Government's official web portal to all federal, state, and local government web resources and services.

Model Diagnostics
Product Menu

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
(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 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 

NOAA/ National Weather Service
National Centers for Environmental Prediction
Weather Prediction Center
5830 University Research Court
College Park, Maryland 20740
Weather Prediction Center Web Team
Privacy Policy
About Us
Career Opportunities
Page last modified: Tuesday, 01-Mar-2022 15:51:15 UTC