Tri City cannot catch a break with weather and USAC shows. That being said this seems premature to me looking from the outside. I understand you have to make the call early because guys are traveling from Indy and beyond but...with races the next night in Pevely (which is still on with even dimmer looking forecast), I think you could try? It's not like the forecast looks completely dismal. It looks like the rain is supposed to be gone by 1 on Friday.