Where can I read up on every metric that Tempest displays and what it means exactly, for example my barometric pressure near the top verses Station Pressure at the bottom of my weather station readings - (what is the difference between these 2?) and explanation of every other metric.
Some are obvious, like temperature - but what about “Wet Bulb Temperature” & “Wet Bulb Glob Temperature”
TDK
Are you wanting more than what is on this page?
I would suggest asking Google for whatever terms you’re looking for. You might also look at the extensive set of weewx documentation which does a pretty good job - look near the top of their wiki at Home · weewx/weewx Wiki · GitHub
The three different pressure measurements are explained in this WeeWX page on the site linked above:
https://github.com/weewx/weewx/wiki/Barometer,-pressure,-and-altimeter