2-3 thunderstorms a year, 2-3 windstorms a year. The only real notable one was a windstorm in 2006, where a storm packing 120km/h winds blowing in an unusual direction levelled 41 hectares (over 100 trees) of Stanley Park in Vancouver, and did extensive damage to the seawall there.
If we get 2 inches or more of snow in Vancouver (once or twice a year, usually) it's paralyzed...
In Penticton, we once had a large, dead evergreen fall on our house, without doing any damage at all,. It pulled out by the root ball, so that must have slowed the fall.