"Should I just take the domes off today and let some of the water evaporate out of the soil?"

Yes. Your medium should be 'moist' not 'wet'.
I've never used a cold frame, but I would think, since it is covered, that a plastic dome wouldn't be needed. Those domes are just to help keep moisture in the medium until the seeds sprout anyway. As long as your medium is moist and the cold frame is keeping your trays warm, I wouldn't bother with the domes. I would also take your starting pots/cells out of the trays and set them on the ground(or an old towel)until the excess moisture is drained/wicked off. HTH

Agree. No domes and do not leave them sitting in any water either - no moisture tray. Temperature in cold frames can get very hot if not properly monitored and it is easy to boil/kill seeds and even seedlings in soil that is too wet and too hot.

Dave

Where can I get a detailed planting schedule for a wide variety of both Annual and Perennial Spring flowers that relates to zone 8?

Thank you

Jim