Unable to make Nightbot display South Pole's weather with weather variable

I'm trying to use Nightbot's $(weather [location]) variable to display the weather at the South Pole, but no matter what identifier I try to use it gives me the wrong place or gives an "invalid location specified" error. Its zip code returns Coatzacoalcos, Mexico (despite that being 96599, not 96598), and any permutation of South Pole, Antarctica, Amundsen-Scott Station, etc. returns things with vaguely similar names, but that are clearly incorrect (e.g. Santa Pola, Antártica, Scottsdale, etc.). Is there any list of valid locations so I can put in the precise one it needs to display the weather for the South Pole? At this point I'd even take some other part of Antarctica, if the South Pole Station isn't an option.