Rapid Refresh (RAP) and High-Resolution Rapid Refresh (HRRR) Forum

Re: Dewpoint temps greater than temperature

Posted By: Stan Benjamin
Date: 16-September-04 2214Z

In Response To: Dewpoint temps greater than temperature (Scott Dennstaedt)

Scott, Thanks for your observant question on possible slight supersaturation in the RUC sounding data on the FSL sounding web page. You saw it correctly, but it is not from a model bug but instead a misdesign of the timing for calling output within the model. This is only an issue in the native-coordinate RUC output (used in the sounding web page), not the isobaric output, BUFR soundings or any other RUC output. The output is currently made within a time step when the cloud physics is 2 min behind the dynamics. So it is possible to get a slight supersaturation, as you found in the Pensacola sounding last evening. We'll get this output timing fixed, but at least you can be assured that it is not a bug in the RUC model physics. Thanks for asking. Stan Benjamin

Messages In This Thread

Dewpoint temps greater than temperature -- Scott Dennstaedt -- 16-September-04 0307Z

Re: Dewpoint temps greater than temperature -- Stan Benjamin -- 16-September-04 2214Z

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