5th Gen Thundurus thunderstorm problems

[PerfectKyurem]

So I checked the bulletin board in white, and it says that there is an unusual thunderstorm there. But when I go there, there is NO thunderstorm. What should I do?

 

[PurpleOrange]

So I checked the bulletin board in white, and it says that there is an unusual thunderstorm there. But when I go there, there is NO thunderstorm. What should I do?

the bulletin boards are kinda rubbish as in they don't really work properly, your best bet is to keep going in and out of the route until you hit a thunderstorm, i personally kept going between mistralton city and route 7 until there was a storm on route 7, hope this helps