Pennsylvania has snow days like it's nobody's business. If a mom somewhere just smells snow, it triggers a chain reaction as every school district closes down, county by county, and all of the remaining bread and milk in the supermarket is bought in a frenzy of fear. I'm serious, someone smells snow; good luck getting bread or milk.
PA doesn't hesitate to close schools for a week at a time due to irrational exhuberance and parental outrage. In all fairness, most PA bus drivers are either alcoholics or Bibleholics, both of which should remain off the roads during weather of any inclement.
Common scenario: someone (and generally not a meteorolgist) predicts that we will get "up to 12 inches" of snow. Schools across the state close down and rejoicing children everywhere wake up to clear skies and not a speck of white on the ground.
Additionally, a correct prediction of snow can be predicted using the following forumula:
Predicted Number of Inches of Snow - 5 = Actual snow fall. All predictions of 5 inches or less can be considered "truthiness" at best.