As one of our reader's commented on the previous post, it is unbelievably dry today. I don't know what the record dew-point depression (the difference between the air temperature and dew point) is at the Salt Lake City Airport, but at 4 PM this afternoon it was 100.4ºF with a dewpoint of 1.4ºF. Well chief, that gives us an Agent 99 dewpoint depression and a 2% relative humidity.
Some industrious soul needs to process the hourly weather records and see how common a 99ºF dewpoint depression is at KSLC. My guess is it is extremely rare. I know that in June, the average afternoon (6 PM) dewpoint is 42ºF, but have never looked at the extremes.
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