yeah, kept me up all night as well....i thought our roof was going to rip right off at one point. No point in flying...you would just be blown right off the end of 29R and find yourself flying backwards into Denver.
Not that rare, used to see it all the time when I lived there. It can happen quick too... One time I was at BJC at it was calm. 30 mins later, a peak gust of 80 mph was recorded, with sustained winds of 55 mph.
I was flying in north eastern WY today, we had winds 290 @ 140 from FL330 all the way down to FL220. Didn't drop below 100 kts until 16000, and at traffic pattern altitude, the winds are blowing at 75 kts. I'm surprised we didn't hit any wind shear.