Over the past few days, the NWS-Cleveland forecast has been switching back and forth between a small chance of rain Sunday and no mention of rain chances. This afternoon, they have removed their mention of a chance of rain. I'm going to keep a slight chance in my forecast because there is a weak low pressure trough that will be moving across the Great Lakes that day. While most of the rain with that system will stay north of Mid-Ohio, there will be some instability present across central Ohio that may allow for some showers and storms to develop farther south. There are a couple models that are showing this. I still think the chance of any rain at the track is small, just 20%, and it is unlikely that the race will be impacted. However, as I've been saying for the past few days, it cannot be ruled out entirely, and I'd rather stay consistent with my forecast unless there is a compelling reason to change it.