I had reason to ask.
The drive to North Seattle from South Everett was uneventful for me, despite what KOMO 1000 was reporting --- until I parked in the Base lot. My first step out of the car was a 'slide'.
As I pulled out of the Base, the Coordinator announced on the radio that he had reports of 92 accidents! and for the Operators not to call unless we were involved in a 'Bus' accident...
I made it to Kenmore P&R and didn't have any trouble until pulling off of Lake City Way to Ravenna.
The back end of the 60' coach started to slide into the oncoming lane when applying the throttle.
My passengers were thrilled.
We'd already been slowly moving from 110th, southbound, for 45 minutes. There was a Bus pulled into the cutoff after being sideswiped by another vehicle and that's where the slowdown started.
Oncoming traffic was sliding all over the place and the southbound Express Lanes were closed - causing the major backup.
The early hours were the worst. After about 10AM, everything was just 'wet' instead of frozen.
I'm going to get up and check that weather link, and then venture out for Mini Pancakes!