Strange wind speed values 2018


I recently downloaded the PSM data for a location in Bolivia (the NSRDB point was at -17.79,-63.18) through the online viewer. When I was checking the data, the solar insolation values made sense and so did the wind directional information, but I think there is something wrong with the wind speed numbers. The data I downloaded shows average wind speeds of well below 1 m/s, with the maximum value over the 18 years of data being only 1.4 m/s! According to the data stored in the MERRA database, the average speeds should be more like 5-8 m/s.

Perhaps there was some bug in the wind speed data or perhaps an incorrect unit conversion? Has anyone else seen this sort of issue before?