The Thursday evening snow took the Tri-State by surprise. The surprise was especially jarring in Warren and Butler Counties. By 10pm Thursday night 6 inches or more of snow had fallen. Butler County's Sheriff issued a level one advisory urging drivers to be careful. Side roads and neighborhoods are especially treacherous for vehicles without 4 wheel drive. At last report, no serious injuries are roadway delays had been reported in the northern part of the Ohio Tri-State counties.