Q for a Met expert...
On more than one occasion, the ATIS has declared the temp/dewpoint to be the same. Digging deep into the very small storage areas in my brain, I can only recall that a close, or same, temp/dewpoint would mean saturated air, therefore visible moisture.
On each of these occasions, it has been totally clear, little or no visible moisture, but humid on arrival. For instance, this morning, it was 23'C/23'C, 7nm, Few at 7,500
Can anyone explain this to me (in words of less than one syllable, please.....)
Thank you.