We’ve found out that some of the data from approximately July 2014 - July 2015 may have been collected using the wrong instrument calibrations on many of the analog instruments. This affects the cups, vanes, temperature and humidity sensors, and barometric pressure sensors on both towers. This does not affect the sonic anemometers, which are a digital signal.
Obviously symptoms include unusual temperature gradients and relatively low pressure for this elevation above sea level. Cups and vanes are thought to have had less than 1% change as a result.
If you have been using this data, please check that you are using data version 1.41 or higher, which has had this recalibration applied. Sorry for any inconvenience caused.