It will be fine!!! I have never been in pow in CO that really REQUIRED a monster powder board. I ride my 158 Evo in the pow as much as possible and it's awesome. For your board just set the binders back a little and dont slow down!!!
I agree with Fluid... you're totally fine. I ride a 157 at least 100+ days a year in the BC mountains. That's a pretty good board too. Keep it, it will be excellent. You don't want some super long stiff plank that you can't maneuver through trees or spin off things with.