GEFS: Global Ensemble Forecast System Weather Model

The Global Ensemble Forecast System (GEFS) is a weather forecast model comprising 21 separate ensemble members. It is produced four times daily by the National Centers for Environmental Prediction (NCEP) to quantify forecast uncertainty, with predictions extending to 16 days. The model has global coverage.

Use Cases

• Quantifying forecast uncertainty based on 21 perturbed ensemble members
• Analyzing global weather patterns based on the model's global coverage
• Comparing forecast runs based on the four daily production cycles
• Studying long-term weather trends based on forecasts extending to 16 days

Strengths

• Model comprises 21 ensemble members for uncertainty quantification
• Forecasts are produced four times daily
• Forecasts extend to 16 days
• Model has global spatial coverage

Limitations

• Column-level documentation is absent; field semantics must be inferred after download
• Row count is unknown, which may limit suitability assessment
• Last update date is unknown; freshness unverified

Provenance

Source

National Centers for Environmental Prediction (NCEP)

Collection Method

Model-generated forecasts

Time Range

Forecasts extend to 16 days from each run

Freshness

Produced four times daily

Geography

Global