"icy conditions" is correct and usable in written English.
You can use it to describe weather conditions that are cold and covered in ice. Example: The roads were treacherous due to the icy conditions.
wearing anti-slip shoes in icy conditions.
One example is slipping and falling in icy conditions.
Icy conditions complicated the work for rescuers, officials said.
In modern cities, icy conditions are easily recreated by technology.
Continued icy conditions kept the schools closed anyway.
Traffic accidents blamed on icy conditions have killed more than a dozen people.
Icy conditions were expected in the southern Appalachians today as the storm system moved east.
It said severe cold weather and icy conditions would last at least until Friday morning.
–What road surface would work the best in wet or icy conditions?
Authorities pleaded with people to stay off of roads due to the icy conditions.
The first windfarm designed to withstand icy conditions was built in Finland.
