Are Norwegian Forest Cats vocal?

This, I believe, is a difficult question to answer with precision because even within a cat breed there will naturally be variations between individual cats as to their character and behaviour and temperament et cetera. My reference work which I go to on this kind of topic is Legacy of the Cat by Gloria Stephens who is a former show judge and who knows the business very well. She is clearly imbued with all aspects of the cat fancy. And I will, therefore, quote her verbatim if I may as follows:

"They are by nature free thinking, yet because they have been domesticated, they remain extraordinarily astute, affectionate and loving. They are usually very quiet, so it may be difficult to know when the female is in season. Most are not interested in playing games but will quietly watch other cats at play. These cats are intelligent, dependable and sensible."

On that appraisal, I cannot say that the Norwegian Forest Cat is vocal. Quite the opposite in fact according to Gloria Stephens. They are quiet and reserved but smart and excellent companion cats. 

ASSOCIATED: Norwegian Forest Cat for Kids.

Norwegian Forest Cat. Montage by MikeB

You will see them in all colours and patterns so you will have a very wide choice if you decide to buy one from a cat breeder. 

They are larger than the average domestic cat ("substantial build") and became pedigree, purebred cats of the cat fancy in the 1930s in Norway for the first time. Before that they were standard moggies but beautiful moggies nonetheless which is exactly why somebody decided to turn them into purebred cats through selective breeeding.

If you go to Norway today you will see moggies and some of them should be like the purebred variety. Their history is a mystery! But they were for a long time random bred cats in Norway. I'm going to guess and say that the first domestic cats in Norway were probably imported with traders perhaps a thousand or more years ago. 

The domestic cat spread out from the Middle East where they were first domesticated around 9,500 years ago (Fertile Crescent which is now where Syria is) with the help of traders on boats.