The three day history for KGRR shows that the high on the 19th was 88 degrees F at numerous points throughout the afternoon and evening, and that the low was 71 degrees F early in the morning, but if you look at the daily data for a month it says the high was 90 degrees F and the low was . . . 49 degrees F.
The mean minimum for July going back to 1892 is 49 degrees F, so that explains that error. Some idiot transcribed that value instead of the actual value. So far this month, the lowest minimum was 52 degrees F.
Can't explain the 2 degree F discrepancy for the high, though. You would think that there would be room for a spike up to 90 during an hour interval by the presence of at least one 89 value at some regular hourly interval, but there isn't one.
Is someone's fat finger on the scale over there?
It's a good reminder that the human element introduces error into the record, whether intentional or not, and that you can't believe everything you're told, even about the simplest of things.
By the way, I'm just four miles from the station as the crow flies, and we had a rain shower last night which doesn't show up in the three day history either.
I know, I know, aLl wEaThEr iS LoCaL.
