How often is the global winds aloft forecast updated?

At a global level, the winds aloft are updated with a new forecast every 6 hours.  For North America, Europe and Australia, the forecasts are updated every hour.

The time resolution for the global forecasts is every 3 hours through 30 hours (ei: 00Z, 03Z, 06Z, 09Z).  For North America, Europe and Australia, the forecasts time resolution is every 1 hour for the first 12 hours and then every 3 hours out to 30 hours.