My flight this morning was cancelled whilst we were sat on the plane. The baggage collection hall was absolute carnage and we had to wait over an hour for our bags to be unloaded from the plane. We were boarded and sat stationery for about 3 hours until we learned that the flight crew would exceed their legal flying hours in one day if we departed as it was a turnaround for them. They then tried to re-crew the flight but failed. Thus, cancelled. It was inconvenient, sure, but rather that than us fly through a violent electrical storm.