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System Configuration Information

These information can be changed if the corresponding operational model is modified.

GPC Washington

GPC Washington
When was the current long-range forecast system implemented? March 2011
Is it a coupled forecast system? Yes
Is it a Tier-2 forecast system? No
Atmospheric Model Resolution Spectral, T126/L64
Ocean model (if applicable) MOM4
Source of atmospheric initial conditions Climate Forecast System Reanalysis (CFSR)
Source of ocean initial conditions Global Ocean Data Assimilation System
If Tier-2, what is the source of SST predictions? N/A
Hindcast Period 1981-2010
Ensemble size for the hindcasts 20
How is the hindcast ensemble configured? 1-day apart 5 observed atmospheric initial conditions clustered around the analyzed ocean initial state on 1st, 11th, and 21st of the month
Ensemble size for the forecast 40
How is the forecast ensemble configured? 4 per day
Length of forecasts 9 months
Data Format GRIB 1
What is the latest date predicted anomalies for the next month/season become available? 7th of the current month.  For example, forecast for JJA are available on 7th May
How are the forecast anomalies constructed? Lagged ensemble based on forecasts from last 20 days
URL where forecast are displayed
Point of Contact Arun Kumar (

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