I am pretty sure this is MY term for this phenomenon...but we had it this morning. It is a fog that everything it touches leaves a frost. The air is brisk and cold and frozen...your breath a moist frozen puff. It looks like it snowed but the particles are most a frost.
Here is a closer look on the tree branches...
The trees are experiencing a heavy frost...this will be gone shortly the sun is up now and the fog is already lifting.
the chair shows the frost..and it is under a roof cover...the fog seeps everywhere and where it goes it leaves the frost.
Baby Jay is doing very well...Mom is so proud of her little one and VERY protective!