[lbrindze]

GEFS is the noaa ensemble product. The operational GFS is actually just a single deterministic forecast run.

A lot of private providers roll up different agencies models to provide their own proper ie tart weather model because this is a lot cheaper than running the HPC required for most deterministic models.

The most important thing when checking the weather, especially with apps like windy, is to compare multiple models for your self to see how “stable” the forecasts are that day.