I’m trying to use weather information in a piston, but the $twcweather variable is null. Am I doing something wrong (e.g. didn’t complete some setup to be able to use $twcweather) or is this some kind of bug?
I googled around a little, but didn’t really find anything related to $twcweather (only the older $weather variable).
$twcweather is not a variable. (despite being seen in the drop down menu)
What exact weather data are you looking to gather?
I always use an Expression box, such as:
Ah, I see. When I entered $twcweather in the expression box under my piston, it showed up as null (in addition to showing up as null in the System Variables box). Looks like $twcweather isn’t a normal structure but some “magic” construct that can be null and have members that are accessible at the same time 
