Wondered why my threshold entries were empty in the settings
You changed the names for the threshold config, see: https://github.com/naofireblade/homebridge-weather-plus/compare/v3.3.3...master#diff-be1695b1e63a508d59982601f9e1fb7f58247deecb1e427adb77bcad758ae5e5
It was for example "tresholdAirPressure" in plugin version 3.3.2
Since 3.3.3 you corrected the typo and named it "t**h**resholdAirPressure".
This results in empty settings for the threshold sensors.
No big deal but would have been nice to be noticed about this. ;-)