Wanted to give you an update, we've received a response from Aeris regarding the reported issue:
Our team has reviewed this issue and found the cause...
Specifically, an update to the platform last week seems to have caused a bug to surface. Specifically, some NOAA observations stations will send out a 24 hour precip parameter with the observation. For most stations this will be for the current day, though for these stations the value is the QCd value for the previous day.
The update last week was incorrectly using this value for the current day, if other precipitation had fallen, vs applying the value to the previous day's summary.
Our team has implemented the following in order:
Quick Fix - Reverted the change from last week
Added new tests based on this bug.
Resolved the bug of which all tests have passed.
Compared updated values to NOAA values for several hundred stations.
Pushed the critical path to production.
Updating the summary data for the past few weeks to ensure it's accurate
Thanks again for bringing this to our attention, we hope that you'll improvements with your weather data reporting moving forward. Please let us know if we can be of any further assistance.