North American Seasonal Forecast System (NASFS)

The North American Seasonal Forecast System (NASFS) will improve seasonal and multi-seasonal predictions for North America by combining different models of known performance to leverage on existing models to improve skills. Objectives of this activity are:

  • Continue with current National Multi-Model Ensemble (NMME) research/experimental project towards improved seasonal forecast products over North America and continued delivery of real-time experimental products.
  • Reach mutual trilateral agreement (between Mexico, Canada and USA) about an Operational partnership on a shared Seasonal Prediction System as an outcome of NMME
  • Make the transition from NMME to Operations
  • Develop NMME future 5-year plan to enhance NMME capabilities to better meet user needs and Evaluate the potential applications of NMME forecast from both, technical and end-user perspectives

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About the NMME


Climate Program Office
1315 East-West Hwy, Suite 1100
Silver Spring, MD 20910


Americans’ health, security and economic wellbeing are tied to climate and weather. Every day, we see communities grappling with environmental challenges due to unusual or extreme events related to climate and weather. In 2017, the United States experienced a record-tying 16 climate- and weather-related disasters where overall costs reached or exceeded $1 billion. Combined, these events claimed 362 lives, and had significant economic effects on the areas impacted, costing more than $306 billion. Businesses, policy leaders, resource managers and citizens are increasingly asking for information to help them address such challenges.