Jeremy R lives in St. Louis and is leaving weather information in the comments to this post. His latest:

Actually, now it's starting to pick up. Not a heavy rain, but more of a medium one. Just got back from walking my dogs, and they were soaking wet.

This may be a short game tonight. If they don't play today, they probably won't be able to go again until Friday at the earliest, meaning games get pushed back in Detroit as well. Although given that rain is in the forecast for Saturday in the Motor City, while St. Louis is supposed to be sunny, that may not be a bad thing.