Leyland cypress are marginally hardy in Maryland.  Not only did we have very low temperatures this winter and thus a lot of winter damage on evergreens, but we also had a very dry fall which make damage worse.  In addition, the long warm temperatures in the fall prevented many plants from going dormant and then the cold temperatures were very sudden.  

 All in all, not good for Leylands.  Many Leylands look like yours this year. The dead growth will fall off and eventually new growth will cover it.  Be sure to water if we have a drought this growing season--including droughts in spring or fall (until now, spring has been abnormally dry.)

Some of the inner browning is just old foliage that normally turns brown. Plus, shaded Leylands also have more browning. 

 ECN

Thank you very much for your quick and comprehensive response!

You're most welcome.