From the Wizard101 login screen: Wizard101 Extended Maintenance & Game Update
Wizard101 the game will be offline tonight from 3:00am to 6:00am Central US Time. Updates are being made to the game, and more info can be found here. During this time, players will be unable to log in to the game, and active players will be prompted to log out.
Pre-quests are here and Greyrose confirms that the Warehouse will be OPTIONAL! Still good for a farm though... Happy Pre-questing and farming tomorrow!