Did you check the calendar and see if it was "Mysterious weather", like MDianaSims mentioned? Because that was the first thing that popped into my head. Personally, I've never seen it, its never happened in any of my saves. And I've had sims living there since the release of IL, almost exclusively. Would be nice for Winterfest, honestly! Winter deco looks so out of place next to palm trees and sand and sims in bathing attire.
I couldn't find the issue on AHQ, could be nobody else has experienced this, or they just didn't bother to make a report on it. I did search for "snow sulani" and "snowstorm", but nothing spesific came up. Couldn't find anything in the compiled list either, when looking at IL and Seasons lists. Might be worth it to post there also?
