http://www.pcgamer.com/a-new-fortnite-update-adds-weapons-smoke-grenades-and-two-more-leaderboards/

Epic's latest update to the zombie survival shooter Fortnite brings some handy new toys to both the Battle Royale and Save the World modes (and in case there's any question, by "toys" I mean mostly guns), plus a pair of new Battle Royale leaderboards and the return of "Mutant Storms." 

Mutant Storms are special storms in the Save the World mode that grant unique modifiers to enemies and heroes, and drop "useful rewards" for dealing with them. They were introduced in the 1.5 patch, and with the Fortnitemares event now concluded, they're back. New Mutant Storm-specific Event Quests have been added, and tickets from missions can be earned up to ten times per day. Nine new Vindertech weapons are also now available from event quests and event llamas.