Global Producing Centres for Long-Range Forecasts

In 2006, the World Meteorological Organization (WMO) began a process to designate centres making global seasonal forecasts as WMO Global Producing Centres for Long-Range Forecasts (GPCs-LRF). This forms an integral part of the WMO Global Data-Processing and Forecasting System (GDPFS).

Through this designation process, GPCs-LRF adhere to certain well-defined standards, aiding the consistency and usability of:

  • fixed forecast production cycles
  • standard sets of forecast products
  • WMO-defined verification standards (for retrospective forecasts).

A comprehensive set of standard verification measures has also been defined, and is known as the WMO Standard Verification System for Long-Range Forecasts (SVSLRF).

At minimum, the following are required from GPCs-LRF:

  • Predictions for averages, accumulations, or frequencies over 1-month periods or longer (typically anomalies in 3-month-averaged quantities is the standard format for seasonal forecasts, and forecasts are usually expressed probabilistically)
  • Lead time: between 0 and 4 months
  • Issue frequency: monthly or at least quarterly
  • Delivery: graphical images on GPC-LRF website and/or digital data for download
  • Variables: 2m temperature, precipitation, Sea Surface Temperature (SST), Mean Sea-Level Pressure (MSLP), 500hPa height, 850hPa temperature
  • Long-term forecast skill assessments, using measures defined by the SVSLRF.

WMO Global Producing Centres for Long-Range Forecasts



WMO has officially designated 14 GPCs-LRF:

In addition to the institutions referenced above, WMO has also designated the following Lead Centres:

Other Major Centres Providing Global Seasonal Forecasts