Dear Shar,
If you’d like to access the undistributed wind upwind of the turbine within a FAST simulation at more than the 9 points NWindVel is limited to, you’ll have to make a minor modification to InflowWind and recompile FAST.
Though not “officially” documented, the LIDAR module of FAST may also be of interest to you: Linking measured wind data from LIDAR to Turbsim - #8 by Bonnie.Jonkman.
Apart from the FAST simulation, the standalone InflowWind driver is also useful for analyzing wind data that will be used in a FAST simulation: nwtc.nrel.gov/InflowWind/. In the standalone InflowWind driver, wind data can be output at a set of user-specified points or in a gridded volume.
Best regards,