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Hi Bill- Michael is out for a couple of weeks, so I'll start the conversation. > I am a long-time gempak user and have encountered a strange error in the > frontogenesis function, and was curious to whom I should send the email > reporting the problem? This is the place. We can elevate it to NCEP if need be. > Basically, we have a gempak file created from RUC grib data, and when we > use gdlist on frontogenesis at the surface....FRNT(THTA@2,WND@10), there > are a few points scattered randomly in this small domain covering Iowa > that have -9999 values. These points are NOT near any boundaries, and I > can plot THTA, and the wind values fine. None of these values are > missing, and thus I am not sure why FRNT yields missing values. Is this a new problem in 5.11.4 or is this a longer standing problem? > In doing the same research, we also noticed that SAVS does not appear to > be correctly computing the average over our subdomain -- at least it does > not match the values we see in GDLIST for our specified GAREA. Is that a > known problem, or is it not taking a simple average? (In other words, when > I had 25 points printed out, and then took SAVS of the field, the common > value it prints [average] is not the same as my parameter/25). Best to send separate questions in separate e-mails since we have no way of separating them here. We'll look into both of these. See you in a couple of weeks. Don Murray Ticket Details =================== Ticket ID: PWP-640462 Department: Support GEMPAK Priority: Normal Status: Open