This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.
Gustavo, The packing file for dclsfc ($GEMTBL/pack/lsfc.pack) stores Daily max and min (TDXC and TDNC). The WMO region III reports only decode 12 hour max/min, so they are not written to the decoded file. The section 333 is region specific. Steve Chiswell Unidata User Support > Dear Unidata’support staff; > > > When reading a Surface data file (this is a synop file) variables like > > T6XC - Maximum 6-hour temperature in Celsius > T6NC - Minimum 6-hour temperature in Celsius > T6XF - Maximum 6-hour temperature in Fahrenheit > > It seems there is a problem. See for instance: > > SFFILE Surface data file > /data/ldm/gempak/syn/20061129_syn.gem > AREA Data area SAEZ ** > DATTIM Date/time ALL > SFPARM Surface parameter list T6XF > OUTPUT Output device/filename > IDNTYP STNM or STID STID > GEMPAK-SFLIST> > GEMPAK-SFLIST> > GEMPAK-SFLIST>r > [SFLIST 1] Parameter T6XF is not computable. > [SFLIST -4] No valid computable parameters. > Parameters requested: SFFILE,AREA,DATTIM,SFPARM,OUTPUT,IDNTYP. > > It can be there is a problem when reading maximum and minimum temperatures? > > Thank you! > > Gustavo Pittaluga > > > Ticket Details =================== Ticket ID: YGP-795011 Department: Support GEMPAK Priority: Normal Status: Closed