Another followup, looks like a fix will be out by Thursday to help with errant data.
I wanted to provide an update on this.
We confirmed it was an errant value received from the station. PWSweather will list the data in the individual data requests, but ignore it when making a summary. Our team is made this adjustment as well internally and running tests now. We are schedule to push the update to production on Thursday, which should prevent such an errant precip value from being utilized in the future.
I will leave the ticket open and provide a final update once I have confirmed the update has been pushed to production.