According to NOAA Space Weather Scales [1], the effects of those events, their levels, and the corresponding hazards (including biological risks for the "S" category) are listed.
It is unclear to me what "high-flying" and "high latitudes" mean in these cases, and I would think that they would depend on the severity and location of the space weather event.
[0] https://www.swpc.noaa.gov/communities/space-weather-enthusia...
[1] https://www.swpc.noaa.gov/sites/default/files/images/NOAAsca...