I still believe this is only a bug in the name of the displayed weather on some installations / versions of the game. The other is not a bug, but it is using one system for something it was not ment for. Like I do not think the weather on the map is ment to tell you when you can dig, but to give you an idea. Eg some mats can pop in some kind of fine weather, and some kind of bad, but never when it is rainy, and so forth. More rp implementation, than a way to see it exact.
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Ryztools