Question: how often are winds aloft issued?
Answer: 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).