Setting of The Melting Sea

I Have chosen the book the melting sea by Erin Hunter for my independent reading novel for English 1B. The Setting in this book is very well descripted but always changing because the characters (Which are bears) are traveling so the setting is changing.We do know that stays constant that it is taking place in modern time and the location are in Canada because there is a map in the front of the book, An example of setting in this book is when they go trough a fog "The air was full of tiny ice crystals that stung her eyes and settled on her pelt, striking deep into her fur like frozen thorns." There is good imagery where u can see the tiny ice crystal in the air and see them sticking deep into Lusa's fur. I image its like a mist from a mister but all icy like sleet just floating there. How do you picture the frozen fog?