Problem(s) Encountered:

Slit and Dropleaf indicator on the MDM 1.3m Control Panel says 'rain' eventhough there's no rain on the site.

Solution:

This is typically a ‘red-herring’ artifact of the old Vaisala weather station equipment and interface that sometimes occurs when humidity levels increase, even if not to observational limits.  If the all-sky display, weather widget and (if available) 2.4m observer all indicate favorable conditions, it can be ignored.Restarting the TCS control GUI clears the warning.