The unnamed teen is charged with terroristic threats, disorderly conduct, and communication with 911 systems for a non-emergency, the department said in a release.
His case will be adjudicated in Lehigh County Juvenile Court, they added.
APD officers rushed to the high school last Thursday morning, Oct. 26 when they received a report that an active shooter was roaming campus, Daily Voice reported.
Officers and Lehigh County sheriff's deputies "conducted a systematic clearing" of the building and found "no threat to the public," police said at the time.
The incident came just a month after a 15-year-old WAHS student was reportedly found in a bathroom with a loaded handgun.
At that time, district officials said they were considering installing metal detectors at school entrances as a security measure.
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