|Source: Tour of Utah|
An unfortunate aspect of the Tour of Utah and the US Pro Cycling Challenge in Colorado is that they are held in August, during the peak of the North American Monsoon. Thus, there is often a threat of thunderstorms. Climatologically, that risk peaks in the afternoon and evening.
Showers and thunderstorms are definitely a concern for the circuit this afternoon. The latest HRRR, for example, suggests a significant chance of showers and thunderstorms in the northern part of the state.
There is a chance that some of these storms could be strong and the Storm Prediction Center has given us a marginal risk of severe storms.
Here's their summary from their convective outlook issued at 1029 MDT this morning.