Hello, here's one idea that may help you,
See if you like any of these:
Hi Con: Are you looking to keep the wood off of the ground? If that's all, you could just stack the wood on the pallet. You could also use 3 more pallets to make sides and a back by nailing them together and then to the bottom pallet and use sheets of wood to make them so that the snow and rain don't get on them, and also make a top out of another piece off wood. Be sure to paint them with a THIN coat of Thompson's Waterseal. A thick coat isn't good, a thin coat is :) You can paint over the Thompsons, too .Good luck and hope this helped.
Here's an idea: https://www.youtube.com/watch?v=QTkugCe7gTo
There are lots of pallet storage ideas here:
Check this out!