Nitro's pools are grounded and protected from any potential lightning surges. Of course one should always exercise caution during stormy weather, but you can count on us being open and running classes and practices in all kinds of weather unless you hear otherwise. In the event of a closing, we would have our voicemail message updated as well as Facebook page notifying of the closure. In the event of a tornado warning, we would exit the pools and seek shelter in the internal changing rooms until it was deemed safe to continue classes.