As a person with lots of snow and chicken experience. I doubt they will go outside. The first snow of the year my chickens spend the whole day at the door, talking about the scary white stuff.
Even this time of the year when they have seen dozens of snow falls, every new one is an excuse to chatter amongst them self about it. I think one of them said the sky is falling.
When they come out (it will be a brave) one it will only come a few inches to feet, look around and skitter back in. By the second day they are out and running around, but they prefer the shoveled areas to the fluffy areas.