Hey MTB folks, here's what I'm looking at as of right now: after being too slick and soft to ride yesterday, the MTB trail is now fine and the race is on. The sun is out at the moment drying up what remains of the rain from 2 days ago.
We have a forecast of rain overnight, but we've also had rain forecasted for each of the past several days without much actually falling. Yesterday, 20 miles south of here got 2" of rain, while we didn't have any measurable amount. We can handle a bit of rain overnight but not a downpour.
The chance of rain is gone by the start of the TT, after which they're calling for sunnier skies. The TT course is also the most susceptible to flooding. So I would say the TT is the event most in danger of not happening at the moment, while I feel pretty confident the XC race can happen Sunday morning. The STXC race I'm thinking has like a 50/50 shot, maybe a little better.