KDKA had a whole process for school closings. The Principal or an official of the school would call early in the morning, where a producer or intern was taking the calls. They would say "St. Pia Zadora closed" and give a secret code number to authenticate the call.
There was one well-known incident where they erroneously announced a Catholic school that was actually open. KDKA could never figure it out, as the code number should have prevented this.
I had a friend who went to school there whose mother worked in the office.....I may have an idea or two
about how that could have happened.