Gnar pow is when a region gets completely shit on with a snow storm. We combine the words Gnarly and Powder. Gnarly meaning over the top and extreme with powder, which is high amounts of fallen snow.
"Holy crap look at the gnar pow! I can't wait to shred!"
A sledhead is crazed, out of their mind snowmobiler who loves powder, and breaking trail through five feet of snow. sledheads can be found all over, most prominant in the snowy regions of the west.
Look at them sledheads rippin it up on the mountain! Man, I wish I were them.