WLP862 Cry Havoc. Licensed from Charlie Papazian, this strain can ferment at ale and lager temperatures, allowing brewers to produce diverse beer styles. The recipes in both Papazian's books, The Complete Joy of Homebrewing and The Homebrewers Companion, were originally developed and brewed with this yeast. For Ales: Attenuation: 66-70. Flocculation: M-L. Optimum Fermentation Temperature: 68-74F. Optimum Cellaring Temperature: 50-55F. Alt beers can be cellared at lagering temperatures. For Lagers: Attenuation: 66-70. Flocculation: L. Optimum Fermentation Temperature: 55-58F. Optimum Lagering Temperature: 32-37F.