I like to follow this thread from Ireland. Not sure how it relates to your part of the USA, but it's northern hemisphere and Nicky posts a calendar of what she sows with examples of types that grow well in the winter.
http://www.nickykylegardening.com/
For years, I've grown a kale called Ragged Jack (also called Red Russian) during winter months.
You only need two or three plants, they grow very big and I just pick leaves off as I need them. Young leaves can be used in salads also. Last year it did bolt, but i just cut it back near to the base and it grew back.