I have never seen one of these before.
... Record low temperature report at Douglas AZ retracted...
The kdug ASOS reported a low temperature of 29 degrees which would
break the old record of 30 set in 1949. Due to anomalous data trends
and the potential of insturment error this record report has been
retracted pending further investigation.
Earlier in the year they reported a record high rain of 8 inches in one day which I always suspected as bogus. They did not retract that one.