Additionally, wind data for altitudes at or above 60,000 feet isn't commonly available. The spy balloon was in the 60,000 to 120,000 range. The variability of

Additionally, wind data for altitudes at or above 60,000 feet isn't commonly available. The spy balloon was in the 60,000 to 120,000 range. The variability of wind direction at different altitudes can be seen at https://www.aviationweather.gov/windtemp https://www.aviationweather.gov/windtemp and https://www.aviationweather.gov/windtemp/data?region=slc https://www.aviationweather.gov/windtemp/data?region=slc