-22 degrees for the low this Wednesday

Freezing is a relative term with antifreeze anyway. The hygrometer freeze point, in my experience, has been more of a slush point. It will usually have to get 10 degrees below that before going into a completely solid state. Even then, the glycols in antifreeze upset the crystal matrix in ice and prevent the full 18% expansion of the transition of water to ice until it gets even colder than the solidification point. Somewhere along the way there, the ice crystals will start to stack up and squeeze the antifreeze out of solution. The antifreeze, being lighter than water, will float on the ice. Part of the reason the core or "frost" plugs are at the bottom of the water jacket, I've known of several vehicles to have frozen from too much water being added to coolant to have pushed the freeze plugs out without actually damaging the block. I’ve seen one or two with almost no antifreeze too, those didn’t end so well.