Scott Dennstaedt, PhD Posted January 12, 2021 Report Posted January 12, 2021 (edited) On 1/5/2021 at 12:26 AM, PT20J said: Good question for @Scott Dennstaedt Skip, It's likely because it's an AWOS-3. They are a piece of crap compared to an ASOS. The ASOS has much higher standards and would never generate a dewpoint temperature warmer than the temperature. Here's a nearby obs from an ASOS. METAR KOMA 041452Z 00000KT 3SM BR FEW004 SCT120 BKN250 M02/M03 A2999 RMK AO2 SLP168 I3001 T10171028 53031= Chalk it up to fake news! Here's the algorithm used by the ASOS... The current 1-minute ambient temperature is also compared against the current 1-minute dew point temperature to ensure the dew point is not higher. If the dew point temperature exceeds the ambient temperature by 2°F or less, the dew point temperature is set equal to the ambient temperature. If the dew point temperature exceeds the ambient temperature by more than 2°F, the 1-minute dew point temperature is set to “missing.” Edited January 12, 2021 by Scott Dennstaedt 2
jlunseth Posted January 12, 2021 Report Posted January 12, 2021 I think I learned that from Scott Dennstaedt in the first place, at one of his great seminars. 2
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