No Thunderstorm Icon

Hi there.

Sorry for bugging you so much! this is probably one of the last posts I’ll make on here. There is a problem with the plugin. It’s not a big one though but there isn’t any icon for Thunderstorms… When there is a thunderstorm it just displays a blank icon and makes the text overlap. Is there any way to add icons? Or can you add it? Thanks!

https://ww.wp.xz.cn/plugins/wp-cloudy/